Four Principles of Mill and Ball Ratio
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
The Collocation between steel ball and ball mill exist certain principles. So, what are these principles?
1, According to the power of the main motor of ball mill ball allowed determining the amount. Fill space load rate is in commonly 25% - 35%, ball load rate is low and the power consumption is also reduced, but the productivity is low. Therefore, prerequisite of verify the total weight is to add the steel ball and material in the mill and the weight is less than allowable value close to the ball mill and motor power.
2, Determine the maximum steel ball diameter.
3, Measure the ball ratio and steel ball surface area to reach the rationality. The warehouse steel ball surface area of steel per ton reach 9.5 - 10.5m2, for closed-circuit ball milling with roller press, this value can be adjusted to 12 - 14m2/t steel ball. The liner is a continuous improvement. The ball into the two bins in the specific surface area is 35 - 38m2/t steel ball; with roller press is 38 - 40m2/t steel ball. The entire specific ball diameter ratio still should be calculated in terms of the maximum packing density.
4, Match with the principle of ball main functions of each bin the ball, and combined with the liner type. A barn feeding clinker particles up to 30mm, and all its main role is to broken. So, the diameter of the steel ball load should be between 50 to 90mm. Clinker into the ball mill chamber second is less than 2-3mm, Dry Ball Mill Introductionso it is the role of fine grinding, which the storehouse ball range should be 15 - 50mm. Because the fine grinding is grinding and with a single size ball (20 - 25mm), which lined a single waveform lining board can achieve the highest efficiency. If the two cabins can still choose a certain range of steel ball diameter, it can adopt grading lining plate and let the ball near the partition board, small ball in the discharge end.
2015年5月29日星期五
2015年5月28日星期四
What is the Grinding Ball
What is the Grinding Ball
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
Grinding ball material mostly are alumina and zirconia which mainly used in chemical and mechanical grinding powder, and the sample particles by grinding particle diameter is smaller.
Refers to the bauxite, roller powder, industrial alumina, high temperature calcinations Alfa alumina powder as the raw material, after mixing, grinding, milling (pulp, making mud), forming, drying, sintering processes is made, and mainly used as grinding media and widely use of ball. According to the alumina content of different, it can be divided into the aluminum ball, high aluminum ball and high alumina ball. Generally the 60% - 65% alumina content of zoned are regarded as aluminum ball, 75% - 80% of alumina content is called high aluminum ball, 90% alumina content of high alumina ball. The high aluminum ball is subdivided into 90 porcelain, 92 porcelain, and 95, 99 porcelain. Because of its high production cost, the 99 porcelain has a few large manufacturers choose to mass production, and mainly made by part of special ceramics factory by handmade. Due to the lower price of the aluminum ball and high alumina ball, and accepted by most of the ceramic factory, which mainly used for grinding ceramic blank. High alumina ball because of its high strength, high hardness, high wear resistance, thick and hard material finishing and deep processing of heavy, small volume, high temperature resistance, corrosion resistance, no pollution and other excellent properties, it is widely used in different types of ceramic, enamel, glass, chemicals and other plants, especially the 92 content alumina balls were most commonly used.
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
Grinding ball material mostly are alumina and zirconia which mainly used in chemical and mechanical grinding powder, and the sample particles by grinding particle diameter is smaller.
Refers to the bauxite, roller powder, industrial alumina, high temperature calcinations Alfa alumina powder as the raw material, after mixing, grinding, milling (pulp, making mud), forming, drying, sintering processes is made, and mainly used as grinding media and widely use of ball. According to the alumina content of different, it can be divided into the aluminum ball, high aluminum ball and high alumina ball. Generally the 60% - 65% alumina content of zoned are regarded as aluminum ball, 75% - 80% of alumina content is called high aluminum ball, 90% alumina content of high alumina ball. The high aluminum ball is subdivided into 90 porcelain, 92 porcelain, and 95, 99 porcelain. Because of its high production cost, the 99 porcelain has a few large manufacturers choose to mass production, and mainly made by part of special ceramics factory by handmade. Due to the lower price of the aluminum ball and high alumina ball, and accepted by most of the ceramic factory, which mainly used for grinding ceramic blank. High alumina ball because of its high strength, high hardness, high wear resistance, thick and hard material finishing and deep processing of heavy, small volume, high temperature resistance, corrosion resistance, no pollution and other excellent properties, it is widely used in different types of ceramic, enamel, glass, chemicals and other plants, especially the 92 content alumina balls were most commonly used.
2015年5月27日星期三
Introduction of some mineral processing equipment for Iron ore reported by wear-resistant steel ball factory supplier
Introduction of some mineral processing equipment for Iron ore reported by wear-resistant steel ball factory supplier
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
Wear-resistant steel ball factory not only provide wear-resistant steel ball price, ball rolling and forging ball but also often introduce mineral processing equipment for Iron ore. It includes iron ore crushing equipment, wet cleaning equipment, dry separation equipment, grinding equipment, high-frequency screen and filtration equipment. The following are the brief introduction on the part of the equipment. According to the strength of the magnetic field, mineral processing equipment can be divided into strong magnetic and weak magnetic dry separator. Strong magnetic dry separator can reduce the run tail, but cannot improve the grade. Weak magnetic dry separator can effectively improve the grade; it will increase the amount of running tail. grinding balls In some areas, Iron ore beneficiation factories coarse and dry non- fully broken ore, the result is a lot of running tail and the loss of resources is very serious. A strong magnetic dry separation of low taste, large size, and increases the work load of the ball mill, also caused a lot of useless grinding operation. The process design of the iron ore field needs to be improved a certain process. Ball mill is the main iron ore grinding equipment generally. In the iron ore grinding process, grinding design has two sections; there are also designs of single stage grinding. Two sections or single stage depends mainly on the Characteristics of iron ore. For the relatively low hardness smaller particle of iron ore, design principles can be used single ball mill. Conversely, the higher hardness, size large iron ore needs to process using two ball mill designs.
After enrichment dry separation machine, the taste of Iron ore has been increased to about 16%.Grinding Ball After the grinding mill, we using the iron ore wet cleaning equipment further improve the iron enrichment. We can also remove impurity magnetic powder. As the ball after some iron ore size still not meet the requirements, we also need to use high frequency sieve for screening. We will repeat processing material not meet the size requirements after which go to the ball mill. Iron ore wet cleaning device can be just first level, second level third level configuration principle, in order to obtain the maximum lifting and lowering run taste and tail loss.
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
Wear-resistant steel ball factory not only provide wear-resistant steel ball price, ball rolling and forging ball but also often introduce mineral processing equipment for Iron ore. It includes iron ore crushing equipment, wet cleaning equipment, dry separation equipment, grinding equipment, high-frequency screen and filtration equipment. The following are the brief introduction on the part of the equipment. According to the strength of the magnetic field, mineral processing equipment can be divided into strong magnetic and weak magnetic dry separator. Strong magnetic dry separator can reduce the run tail, but cannot improve the grade. Weak magnetic dry separator can effectively improve the grade; it will increase the amount of running tail. grinding balls In some areas, Iron ore beneficiation factories coarse and dry non- fully broken ore, the result is a lot of running tail and the loss of resources is very serious. A strong magnetic dry separation of low taste, large size, and increases the work load of the ball mill, also caused a lot of useless grinding operation. The process design of the iron ore field needs to be improved a certain process. Ball mill is the main iron ore grinding equipment generally. In the iron ore grinding process, grinding design has two sections; there are also designs of single stage grinding. Two sections or single stage depends mainly on the Characteristics of iron ore. For the relatively low hardness smaller particle of iron ore, design principles can be used single ball mill. Conversely, the higher hardness, size large iron ore needs to process using two ball mill designs.
After enrichment dry separation machine, the taste of Iron ore has been increased to about 16%.Grinding Ball After the grinding mill, we using the iron ore wet cleaning equipment further improve the iron enrichment. We can also remove impurity magnetic powder. As the ball after some iron ore size still not meet the requirements, we also need to use high frequency sieve for screening. We will repeat processing material not meet the size requirements after which go to the ball mill. Iron ore wet cleaning device can be just first level, second level third level configuration principle, in order to obtain the maximum lifting and lowering run taste and tail loss.
2015年5月26日星期二
The history of the heat treatment of steel ball
The history of the heat treatment of steel ball
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
The history of the heat treatment of steel ball: in 1863, the British metallographer and geologists showed six different microstructure of steel under a microscope, which proved that during heating and cooling, there will be an organizational change in steel, the steel at high temperature phase in the quenched into a hard phase. Allotropic Frenchman Osmond established the theory of iron, and the British Austen first formulated the iron carbon phase diagram. The above two creations initially lay the theoretical foundation for the modern heat treatment process. At the same time, people also study the protection methods of metal in the heating process of metal heat treatment, in order to avoid metal’s oxidation and decarburization in the heating process.
From 1850 to 1880, there had a series of patents for the application of various gases (such as hydrogen, carbon monoxide gas, etc.) to protect the heating. From 1889 to 1890 the British Lake accessed the patent of the bright heat treatment of a variety of metal.
Since twentieth Century, the development of metal physics and the transplantation application of other new technologies make the metal heat treatment process get greater development. A significant development was in 1901 ~ 1925, application of gas carburizing rotary furnace in industrial production; in 1930s dew point potential difference meter appeared, which can control the carbon potential of furnace atmosphere, and later people developed ways to further control the carbon potential atmosphere furnace using carbon dioxide infrared instrument; in 1960s heat treatment technology made the use of plasma field and developed ion nitriding, carburizing process; the application of laser and electron beam technology made the metal gained new surface heat treatment and chemical heat treatment method.
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
The history of the heat treatment of steel ball: in 1863, the British metallographer and geologists showed six different microstructure of steel under a microscope, which proved that during heating and cooling, there will be an organizational change in steel, the steel at high temperature phase in the quenched into a hard phase. Allotropic Frenchman Osmond established the theory of iron, and the British Austen first formulated the iron carbon phase diagram. The above two creations initially lay the theoretical foundation for the modern heat treatment process. At the same time, people also study the protection methods of metal in the heating process of metal heat treatment, in order to avoid metal’s oxidation and decarburization in the heating process.
From 1850 to 1880, there had a series of patents for the application of various gases (such as hydrogen, carbon monoxide gas, etc.) to protect the heating. From 1889 to 1890 the British Lake accessed the patent of the bright heat treatment of a variety of metal.
Since twentieth Century, the development of metal physics and the transplantation application of other new technologies make the metal heat treatment process get greater development. A significant development was in 1901 ~ 1925, application of gas carburizing rotary furnace in industrial production; in 1930s dew point potential difference meter appeared, which can control the carbon potential of furnace atmosphere, and later people developed ways to further control the carbon potential atmosphere furnace using carbon dioxide infrared instrument; in 1960s heat treatment technology made the use of plasma field and developed ion nitriding, carburizing process; the application of laser and electron beam technology made the metal gained new surface heat treatment and chemical heat treatment method.
2015年5月21日星期四
Beneficiation ball manufacturers’ introduction: overview of Iron ore beneficiation process and the main process technology
Beneficiation ball manufacturers’ introduction: overview of Iron ore beneficiation process and the main process technology
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
China's domestic tastes of magnetite ore are low, mostly around 10%, grinding balls while the market for iron concentrate tastes must reach about 65%. So it is necessary to adopt the necessary processing equipment, processing the low-grade iron ore to high grade iron concentrate.
The technology of iron ore beneficiation process can be divided into dry selected section and wet selected section. Many iron ore processing plant usually separate dry selected section and wet selected section, someone set the dry selected section and wet selected section together. Whatever the method, the goal is to achieve maximum efficiency.
The difference of iron ores’ physical properties is big, among which is mainly the hardness difference is extremely obvious. So it should use special wear-resistant steel ball produced by skew rolling mill(http://ww.skewrollingmill.com) to maximize the efficiency of mineral processing. No matter what type of low grade magnetite, we should use crushing , crushed iron ore with low grade to a certain granularity range, then use the dry separation equipment, primary processing. In general, the smaller of low grade iron ore crushing particle size, the higher separation efficiency of dry separation machine, the longer and higher of the taste after rough processing. We use 10% magnetite as an example, usually in the crushing size reached 5mm, can be upgraded to 17% by dry taste.Grinding Ball Development If the particle size is about 10mm, dry taste will drop to around 15%. On the other hand, up to 3mm or even 1mm, dry taste will be higher. However, taking into account the cost control and the economy of the crushing equipment, we recommend suitable granularity control in 5~10mm. There are many types of iron ore crushing equipment, so it is an important technology process to select reasonable crushing technology and equipment.
The study of a large amount of data shows that the increase of forged steel ball and other kinds of grinding medium loading capacity cannot improve grinding efficiency. The study found that the most appropriate loading of grinding body should be 95% of the rated load of ball mill steel ball.
To strengthen the cement mill ventilation and sealing system, reducing air leakage proper ventilation, you can discharge the mill in the cement powder, reduce crushing, and discharged water vapor, reduce the ball. In addition, the ball mill is connected with lifting machine, powder selecting machine and other production equipment to improve the sealing, lock the wind effect. Reduce grinding temperature grinding system, strengthen the cooling grinding system with high temperature, part of gypsum dehydration effect of cement quality, processing equipment increase the fine powder electrostatic adsorption for ball mill, ball grinding paste increased, the phenomenon is serious, therefore, you should pay attention to the surface cooling system. You should also do regular clearance and timely relief. In the mineral processing production process, grinding and classification is a very important stage.
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
China's domestic tastes of magnetite ore are low, mostly around 10%, grinding balls while the market for iron concentrate tastes must reach about 65%. So it is necessary to adopt the necessary processing equipment, processing the low-grade iron ore to high grade iron concentrate.
The technology of iron ore beneficiation process can be divided into dry selected section and wet selected section. Many iron ore processing plant usually separate dry selected section and wet selected section, someone set the dry selected section and wet selected section together. Whatever the method, the goal is to achieve maximum efficiency.
The difference of iron ores’ physical properties is big, among which is mainly the hardness difference is extremely obvious. So it should use special wear-resistant steel ball produced by skew rolling mill(http://ww.skewrollingmill.com) to maximize the efficiency of mineral processing. No matter what type of low grade magnetite, we should use crushing , crushed iron ore with low grade to a certain granularity range, then use the dry separation equipment, primary processing. In general, the smaller of low grade iron ore crushing particle size, the higher separation efficiency of dry separation machine, the longer and higher of the taste after rough processing. We use 10% magnetite as an example, usually in the crushing size reached 5mm, can be upgraded to 17% by dry taste.Grinding Ball Development If the particle size is about 10mm, dry taste will drop to around 15%. On the other hand, up to 3mm or even 1mm, dry taste will be higher. However, taking into account the cost control and the economy of the crushing equipment, we recommend suitable granularity control in 5~10mm. There are many types of iron ore crushing equipment, so it is an important technology process to select reasonable crushing technology and equipment.
The study of a large amount of data shows that the increase of forged steel ball and other kinds of grinding medium loading capacity cannot improve grinding efficiency. The study found that the most appropriate loading of grinding body should be 95% of the rated load of ball mill steel ball.
To strengthen the cement mill ventilation and sealing system, reducing air leakage proper ventilation, you can discharge the mill in the cement powder, reduce crushing, and discharged water vapor, reduce the ball. In addition, the ball mill is connected with lifting machine, powder selecting machine and other production equipment to improve the sealing, lock the wind effect. Reduce grinding temperature grinding system, strengthen the cooling grinding system with high temperature, part of gypsum dehydration effect of cement quality, processing equipment increase the fine powder electrostatic adsorption for ball mill, ball grinding paste increased, the phenomenon is serious, therefore, you should pay attention to the surface cooling system. You should also do regular clearance and timely relief. In the mineral processing production process, grinding and classification is a very important stage.
2015年5月20日星期三
Reasons of the ball aging
Reasons of the ball aging
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
Ball is widely used in machine, but also aging rapidly, so we know the ball in the course of the causes of aging to improve the life of the ball is also helpful.
Four major causes of ball aging:
1 Cutting and gouging wear. The relative sliding motion in the cylinder of ball mill ball in the rising phase and material, by the group of hard material in cutting groove deep, cutting softer materials on the ball of the relatively shallow, at a certain angle contact materials, materials to produce local gouging wear of the grinding ball, the formation of drilling hole
2 Deformation wear. Cement ball mill and the material relative sliding and mutual impact, in addition to cutting and gouging withstand wear, as well as deformation and chisel plowing deformation incidental, metal is pushed into the grooves and pits oppressed outside edge of the repeat function and metal repeated deformation under strain due to fatigue cracks, crack propagation, connected to form a plow thinning tablets from the ball off the surface.
3 Brittle flaking. Ball mill in the impact process, brittle phase cracking, crushing, peeling from the surface, all of them cause wear.
4 Fatigue wear. Cement mill grinding in the mill up phase by repeated movement of the sliding and rolling, by repeated impact on dropping the phase. The constant impact stress, contact pressure, under the action of shear stress, fatigue cracks in the surface of the ball, Grinding Rod crack parallel to the surface of the expansion, extending to the surface layer formed flaking. Such as the surface of the extension will cause casting defects macroscopic fatigue spalling.
Knowing the above reasons, the ball can avoid as much as possible to enhance the life of the ball.
How to make the diameter of steel ball steel ball processing unified in the process? I will tell you about the secrets of the:。
To control the steel ball diameter, first step we need to control the size of cold heading. Each cutting or upsetting ball diameter size is required to have order. But in the cold heading steel ball after light grinding, hard grinding transfer step, because not every ball are subject to the same rotation and the same rotating force generated at every step, so the ball circulation will have all kinds of problems. Surface scratches, size is not consistent. Thus, the steel ball identification is an important link.
After the summary of experience and innovative technology for several years of production steel ball, Dingsheng steel production has developed advanced machine.
This new classification machine received four national patents. In the selection of other precision, efficiency and mechanical automation performance have made innovations. Steel ball were selected at each step, the unqualified (large or small) screening out the ball, to ensure the unity of the ball diameter. The size of the strict control of ball cannot do Hot rolling steel balls without the ball classification machine function. And its own R & D and production of steel ball machine, precision control in the 0.001mm, the machine can make the unqualified ball out, so that ensure a more finished steel ball steel ball factory production quality.
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
Ball is widely used in machine, but also aging rapidly, so we know the ball in the course of the causes of aging to improve the life of the ball is also helpful.
Four major causes of ball aging:
1 Cutting and gouging wear. The relative sliding motion in the cylinder of ball mill ball in the rising phase and material, by the group of hard material in cutting groove deep, cutting softer materials on the ball of the relatively shallow, at a certain angle contact materials, materials to produce local gouging wear of the grinding ball, the formation of drilling hole
2 Deformation wear. Cement ball mill and the material relative sliding and mutual impact, in addition to cutting and gouging withstand wear, as well as deformation and chisel plowing deformation incidental, metal is pushed into the grooves and pits oppressed outside edge of the repeat function and metal repeated deformation under strain due to fatigue cracks, crack propagation, connected to form a plow thinning tablets from the ball off the surface.
3 Brittle flaking. Ball mill in the impact process, brittle phase cracking, crushing, peeling from the surface, all of them cause wear.
4 Fatigue wear. Cement mill grinding in the mill up phase by repeated movement of the sliding and rolling, by repeated impact on dropping the phase. The constant impact stress, contact pressure, under the action of shear stress, fatigue cracks in the surface of the ball, Grinding Rod crack parallel to the surface of the expansion, extending to the surface layer formed flaking. Such as the surface of the extension will cause casting defects macroscopic fatigue spalling.
Knowing the above reasons, the ball can avoid as much as possible to enhance the life of the ball.
How to make the diameter of steel ball steel ball processing unified in the process? I will tell you about the secrets of the:。
To control the steel ball diameter, first step we need to control the size of cold heading. Each cutting or upsetting ball diameter size is required to have order. But in the cold heading steel ball after light grinding, hard grinding transfer step, because not every ball are subject to the same rotation and the same rotating force generated at every step, so the ball circulation will have all kinds of problems. Surface scratches, size is not consistent. Thus, the steel ball identification is an important link.
After the summary of experience and innovative technology for several years of production steel ball, Dingsheng steel production has developed advanced machine.
This new classification machine received four national patents. In the selection of other precision, efficiency and mechanical automation performance have made innovations. Steel ball were selected at each step, the unqualified (large or small) screening out the ball, to ensure the unity of the ball diameter. The size of the strict control of ball cannot do Hot rolling steel balls without the ball classification machine function. And its own R & D and production of steel ball machine, precision control in the 0.001mm, the machine can make the unqualified ball out, so that ensure a more finished steel ball steel ball factory production quality.
Application of Stainless Steel in construction
Application of Stainless Steel in construction
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
The Function of steel balls’ heat treatment process
Metals are generally subjected to heat treatment, but people are not familiar with the item, now flourishing balls to give everyone a brief look at the metal heat treatment process.
Heat treatment process generally includes heating, insulation and cooling three processes, Reasons of the ball aging sometimes only heating and cooling the two processes. These processes dovetail with each other, cannot be interrupted.
Heating is one important step in heating. Metal heat treatment heating has many ways; the earliest one is the use of charcoal and coal as a heat source, and thus the application of liquid and gaseous fuels. The application of electric heating is easy to control, and no environmental pollution.
Using these sources of heat it can be directly heated, can also be molten salt or metal, as well as the floating particles are heated indirectly.
When metal is being heated, the workplace is exposed to the air, often happens oxidation, decarburization (i.e. steel parts surface carbon content decreased), which after heat treatment parts of the surface performance is adversely affected. Thus metal normally be in a controlled atmosphere or protective atmosphere, the molten salt is heated and vacuum can also be used to protect the coating or packaging methods heating.
The heating temperature is one of the important parameters of the heat treatment process, Selection and control of heating temperature, main issues to ensure the quality of heat treatment. The selection and control of heating temperature is main issues to ensure the quality of heat treatment.
The heating temperature varied with the treated metal material and heat for different purposes; however, it is generally heated to the phase transition temperature or higher to obtain a high tissue. Further transformation requires some time, so when the metal surface achieve the required heating temperature, it must maintain a certain time at this temperature, the temperature inside and outside should be the same, the microstructure transformation complete, this time is called the holding time. High energy density,Difference heat and surface treatment, the heating fast, generally there is no holding time, and chemical treatment of the holding time is often longer.
Cooling is also a heat treatment process is indispensable step. Cooling method due process varies, mainly to control the cooling rate. Generally the slowest one is cooling annealing, normalizing faster cooling, quenching is the fastest one. But due to the different kinds of steel have different requirements, such as empty hard steel can be used as the cooling rate normalizing hardened.
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
The Function of steel balls’ heat treatment process
Metals are generally subjected to heat treatment, but people are not familiar with the item, now flourishing balls to give everyone a brief look at the metal heat treatment process.
Heat treatment process generally includes heating, insulation and cooling three processes, Reasons of the ball aging sometimes only heating and cooling the two processes. These processes dovetail with each other, cannot be interrupted.
Heating is one important step in heating. Metal heat treatment heating has many ways; the earliest one is the use of charcoal and coal as a heat source, and thus the application of liquid and gaseous fuels. The application of electric heating is easy to control, and no environmental pollution.
Using these sources of heat it can be directly heated, can also be molten salt or metal, as well as the floating particles are heated indirectly.
When metal is being heated, the workplace is exposed to the air, often happens oxidation, decarburization (i.e. steel parts surface carbon content decreased), which after heat treatment parts of the surface performance is adversely affected. Thus metal normally be in a controlled atmosphere or protective atmosphere, the molten salt is heated and vacuum can also be used to protect the coating or packaging methods heating.
The heating temperature is one of the important parameters of the heat treatment process, Selection and control of heating temperature, main issues to ensure the quality of heat treatment. The selection and control of heating temperature is main issues to ensure the quality of heat treatment.
The heating temperature varied with the treated metal material and heat for different purposes; however, it is generally heated to the phase transition temperature or higher to obtain a high tissue. Further transformation requires some time, so when the metal surface achieve the required heating temperature, it must maintain a certain time at this temperature, the temperature inside and outside should be the same, the microstructure transformation complete, this time is called the holding time. High energy density,Difference heat and surface treatment, the heating fast, generally there is no holding time, and chemical treatment of the holding time is often longer.
Cooling is also a heat treatment process is indispensable step. Cooling method due process varies, mainly to control the cooling rate. Generally the slowest one is cooling annealing, normalizing faster cooling, quenching is the fastest one. But due to the different kinds of steel have different requirements, such as empty hard steel can be used as the cooling rate normalizing hardened.
2015年5月18日星期一
How to make stainless steel ball wear-resisting
How to make stainless steel ball wear-resisting
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
Ball can be divided into stainless steel ball, bearing steel balls, carbon steel balls three categories. In addition to stainless steel ball has some rust function, the other two materials of the finished ball will need anti-rust oil protection against rust. Ball bearings used in the bearings, the anti-rust oil is essential for protecting agents and lubricants.
In order to improve the quality of the bearing, energy loss and improve the life of stainless steel ball and reducing the harm to human health, the use of anti-rust oil on its content has some elegant. Rust oil dehydration for existing applications, play a positive role.
Rust oil dehydration is made of dehydrating agents, rust inhibitors, and in light petroleum distillate allocation . After ball bears water-based cleaning fluid through the water-washing, it leaves a water film on surface of the ball . The rust oil dehydration dehydrating agent and the interfacial tension of the metal surface than tap water or water-based cleaning agent solution and the metal surface tension, rust oil dehydration, through its contact with the metal surface of the water film and the metal ball blasting further penetration surface. Attached to the surface of the ball to form a thinner layer of humor, which can play a protective role of ball surface and rust. After the ball bearing assembly used in the process, more wear-resistant and has a long-term anti-rust effect.
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
Ball can be divided into stainless steel ball, bearing steel balls, carbon steel balls three categories. In addition to stainless steel ball has some rust function, the other two materials of the finished ball will need anti-rust oil protection against rust. Ball bearings used in the bearings, the anti-rust oil is essential for protecting agents and lubricants.
In order to improve the quality of the bearing, energy loss and improve the life of stainless steel ball and reducing the harm to human health, the use of anti-rust oil on its content has some elegant. Rust oil dehydration for existing applications, play a positive role.
Rust oil dehydration is made of dehydrating agents, rust inhibitors, and in light petroleum distillate allocation . After ball bears water-based cleaning fluid through the water-washing, it leaves a water film on surface of the ball . The rust oil dehydration dehydrating agent and the interfacial tension of the metal surface than tap water or water-based cleaning agent solution and the metal surface tension, rust oil dehydration, through its contact with the metal surface of the water film and the metal ball blasting further penetration surface. Attached to the surface of the ball to form a thinner layer of humor, which can play a protective role of ball surface and rust. After the ball bearing assembly used in the process, more wear-resistant and has a long-term anti-rust effect.
2015年5月15日星期五
Specific advantages of liner wear is reflected in what areas?
Specific advantages of liner wear is reflected in what areas?
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
1, the high wear resistance chemical composition of the alloy layer of the carbon content is 4-5%, chromium content of up to 25 ~ 30%, the microstructure of Cr7C3 carbide volume fraction of 50% or more, macro-hardness of HRC56 ~ 62 , hardness of chromium carbide HV1400 ~ 1800, higher than the hardness of quartz sand HV800 ~ 1200. Since carbide into distribution in the direction perpendicular to wear, even with the same cast alloy composition and hardness compared to wear more than doubled working principle of ball mill liner. With several typical Abrasiveness comparison is as follows:
(1) and the low-carbon steel; 20 ~ 25:
(2) with a high manganese steel; 5 to 10:
(3) with the tool steel; 5 ~ 10:
(4) with high chromium cast iron; 1.5 to 2.5:
2, good impact resistance: resistant composite steel bottom are low-carbon steel or low alloy. Ductile material such as stainless steel, reflects the superiority of the bimetal, wear-resistant layer of wear resistant abrasive media, the substrate exposed to the medium load, it is good impact resistance. Material handling system can withstand high drop hopper to withstand impact and abrasion.
3, good heat resistance: Wear layer is recommended to use at ≤ 600 ℃ conditions, if the alloy layer was added vanadium, molybdenum and alloys can withstand high temperature of ≤ 800℃. Recommended temperature as follows: Ordinary carbon steel substrate is not recommended to use more than 380 ℃ working conditions; low-alloy heat-resistant steel (15CrMo, 12Cr1MoV, etc.) is not higher than 540 ℃ substrate recommended operating conditions used; resistant stainless steel substrate is not higher than recommended 800 ℃ conditions used.
4, good corrosion resistance, wear-resistant composite steel alloy layer contains a high percentage of chromium, it has some rust and corrosion resistance. Coal drop tube and funnel for other occasions can be done to prevent caking coal.
5, applicability resistant composite steel specifications, has many varieties, has become a commodity serialization. Wear-resistant alloy layer has a thickness 3 ~ 20mm. The thickness of the thinnest composite plate is 6mm, the thickness is not limited. Currently, the standard wear-resistant steel sheet provides 1200 or 1450 × 2000mm, also according to user needs, according to the paper size custom processing. Resistant composite plate are divided into common type, impact resistance and high temperature type, ordered high temperature resistant and impact-resistant composite plate to explain.
6, facilitate processing performance can be cut resistant composite plate, leveling, punching, bending and curling, characteristics of forging production it can be made flat, arc plate, cone and plate, cylinder. Composite panels can cut a good welding into a variety of engineering structures or components. Composite panels can also be pressed into heating touch with complex shapes. Resistant composite plate can be fixed with bolts or welding equipment, replacement and easy maintenance.
7, a high price-performance ratio resistant composite plate though manufacturing costs increase, but life improve several times, making the maintenance costs and downtime greatly reduced, its price performance is higher than common materials height of about 2 to 4 times. Greater the amount of material handling, equipment, factories and mines more serious wear and tear, wear-resistant composite plate using the more obvious economic effect.
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
1, the high wear resistance chemical composition of the alloy layer of the carbon content is 4-5%, chromium content of up to 25 ~ 30%, the microstructure of Cr7C3 carbide volume fraction of 50% or more, macro-hardness of HRC56 ~ 62 , hardness of chromium carbide HV1400 ~ 1800, higher than the hardness of quartz sand HV800 ~ 1200. Since carbide into distribution in the direction perpendicular to wear, even with the same cast alloy composition and hardness compared to wear more than doubled working principle of ball mill liner. With several typical Abrasiveness comparison is as follows:
(1) and the low-carbon steel; 20 ~ 25:
(2) with a high manganese steel; 5 to 10:
(3) with the tool steel; 5 ~ 10:
(4) with high chromium cast iron; 1.5 to 2.5:
2, good impact resistance: resistant composite steel bottom are low-carbon steel or low alloy. Ductile material such as stainless steel, reflects the superiority of the bimetal, wear-resistant layer of wear resistant abrasive media, the substrate exposed to the medium load, it is good impact resistance. Material handling system can withstand high drop hopper to withstand impact and abrasion.
3, good heat resistance: Wear layer is recommended to use at ≤ 600 ℃ conditions, if the alloy layer was added vanadium, molybdenum and alloys can withstand high temperature of ≤ 800℃. Recommended temperature as follows: Ordinary carbon steel substrate is not recommended to use more than 380 ℃ working conditions; low-alloy heat-resistant steel (15CrMo, 12Cr1MoV, etc.) is not higher than 540 ℃ substrate recommended operating conditions used; resistant stainless steel substrate is not higher than recommended 800 ℃ conditions used.
4, good corrosion resistance, wear-resistant composite steel alloy layer contains a high percentage of chromium, it has some rust and corrosion resistance. Coal drop tube and funnel for other occasions can be done to prevent caking coal.
5, applicability resistant composite steel specifications, has many varieties, has become a commodity serialization. Wear-resistant alloy layer has a thickness 3 ~ 20mm. The thickness of the thinnest composite plate is 6mm, the thickness is not limited. Currently, the standard wear-resistant steel sheet provides 1200 or 1450 × 2000mm, also according to user needs, according to the paper size custom processing. Resistant composite plate are divided into common type, impact resistance and high temperature type, ordered high temperature resistant and impact-resistant composite plate to explain.
6, facilitate processing performance can be cut resistant composite plate, leveling, punching, bending and curling, characteristics of forging production it can be made flat, arc plate, cone and plate, cylinder. Composite panels can cut a good welding into a variety of engineering structures or components. Composite panels can also be pressed into heating touch with complex shapes. Resistant composite plate can be fixed with bolts or welding equipment, replacement and easy maintenance.
7, a high price-performance ratio resistant composite plate though manufacturing costs increase, but life improve several times, making the maintenance costs and downtime greatly reduced, its price performance is higher than common materials height of about 2 to 4 times. Greater the amount of material handling, equipment, factories and mines more serious wear and tear, wear-resistant composite plate using the more obvious economic effect.
2015年5月11日星期一
How to make wear-resisting stainless steel ball
How to make wear-resisting stainless steel ball
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
Ball can be divided into stainless steel ball, bearing steel balls, carbon steel balls three categories. In addition to stainless steel ball has some rust function, the other two materials of the finished ball will need anti-rust oil protection against rust. Ball bearings used in the bearings, the anti-rust oil is essential for protecting agents and lubricants.
In order to improve the quality of the bearing, energy loss and improve the life of stainless steel ball and reducing the harm to human health, the use of anti-rust oil on its content has some elegant. Rust oil dehydration for existing applications, play a positive role.
Rust oil dehydration is made of dehydrating agents, rust inhibitors, and in light petroleum distillate allocation . After ball bears water-based cleaning fluid through the water-washing, it leaves a water film on surface of the ball . The rust oil dehydration dehydrating agent and the interfacial tension of the metal surface than tap water or water-based cleaning agent solution and the metal surface tension, rust oil dehydration, through its contact with the metal surface of the water film and the metal ball blasting further penetration surface. Attached to the surface of the ball to form a thinner layer of humor, which can play a protective role of ball surface and rust. After the ball bearing assembly used in the process, more wear-resistant and has a long-term anti-rust effect.
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
Ball can be divided into stainless steel ball, bearing steel balls, carbon steel balls three categories. In addition to stainless steel ball has some rust function, the other two materials of the finished ball will need anti-rust oil protection against rust. Ball bearings used in the bearings, the anti-rust oil is essential for protecting agents and lubricants.
In order to improve the quality of the bearing, energy loss and improve the life of stainless steel ball and reducing the harm to human health, the use of anti-rust oil on its content has some elegant. Rust oil dehydration for existing applications, play a positive role.
Rust oil dehydration is made of dehydrating agents, rust inhibitors, and in light petroleum distillate allocation . After ball bears water-based cleaning fluid through the water-washing, it leaves a water film on surface of the ball . The rust oil dehydration dehydrating agent and the interfacial tension of the metal surface than tap water or water-based cleaning agent solution and the metal surface tension, rust oil dehydration, through its contact with the metal surface of the water film and the metal ball blasting further penetration surface. Attached to the surface of the ball to form a thinner layer of humor, which can play a protective role of ball surface and rust. After the ball bearing assembly used in the process, more wear-resistant and has a long-term anti-rust effect.
2015年5月8日星期五
The use of the grinding media steel ball correctly
The use of the grinding media steel ball correctly
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
Small steel ball to add just the first time and with the ball. Because, when the normal operation of the ball mill and ore, steel and reasonable friction between ball mill lining board, will make abrasion increases, in the small ball mill, ball mill for ball. So usually under normal circumstances, do not need to add ball. Add ball is no monomer dissociation in the useful mineral particle size when the fineness of grinding machine can not meet the flotation demand, can add a little ball. Wear of steel ball mill in the process of operation continuously, in order to keep the ball charge filling ratio and the ball of the reasonable proportion, maintain the stability of ball mill operation, must be reasonable for the ball, DiChang wear.
Steel ball add weight, it is according to the quality of the steel ball, steel ball quality, determines the ore tons of adding consumption, had better use the new wear-resistant steel ball, such as using the train wheels with special processing of forging steel ball on the wear-resisting.
New installation of the ball mill has a run-in period, in the running-in process, the amount of steel ball for the first time to add, 80% of the maximum loading ball of ball mill, the proportion of steel ball added can be according to the size of steel ball (Φ 120 ㎜, 100 ㎜ Φ, Φ 80 ㎜, 60 ㎜ Φ, Φ 40 ㎜) size added. Different models of its ball mill ball quantity is different. For example MQG1500 x 3000 largest ball mill ball quantity 9.5-10 tons. For the first time to add steel ball ball (120 ㎜ and 100 ㎜) accounted for 30%, 40%, Reasons of the ball aging the ball 80 ㎜ accounts for 40%, 30%, small ball (60 and 40 ㎜) accounted for 30%.
Why in the process of ball mill in ball mill ball only add 80%,because after installation of ball mill, ball mill need mesh size, capacity are to be gradually increased, with ball mill normal running in two or three days in a row, pick up to check the size of the gear meshing, everything is all right, open the add the remaining 20% steel ball mill manhole covers the second.
High chrome steel ball is mainly used in grinding machine mining condition is relatively poor metal processing industry, mines and thermal power energy.
Low chrome steel balls are widely used in cement industry, chemical industry, power plants, and other fields
Golden ball mill with chromium wear-resistant alloy cast steel balls of ball mill features: high hardness, low wear, Quality index of high chromium steel good toughness and do not break round, broken. Widely used in cement, chemical fertilizer, silicate products, new building material, refractory material, black and non-ferrous metal ore dressing and glass ceramics production industry, etc. In use process, the ball will further improve the surface hardness, wear resistance, and can improve the grinding machine production capacity, improve the cement specific surface area and recovery. Proved by many users, the factory of the wear resistant chromium alloy cast steel ball could keep higher grinding efficiency for a long time, the relative stability of the ball diameter and size distribution, is advantageous to the production of ball mill, stability and improve quality, reduce the ball, a clearance.
Steel ball which are made by skew rolling mill in cement mill during normal operation, every tons of cement production: consume 70 grams or less, low chrome steel ball single storehouse broken rate of 1% or less; High consumption of 30 grams or less chrome steel ball single storehouse, broken rate of 1 ‰ or less. Low chromium consume 80 grams or less forging single storehouse, broken rate of 1.5% or less; High chromium forging single storehouse consumption of 40 grams or less, breakage or less 5 ‰. In coal-fired power plant of the normal operation of coal mill, grinding coal per ton: consume 150 grams or less, low chrome steel ball single storehouse broken rate of 1% or less; High chrome steel balls single warehouse cost 60 grams, or less breakage rate of 1 ‰ or less. In metallurgy, mining,characteristics of forging production chemical and other industrial and mining enterprises according to the buyer conditions to determine the steel ball attrition and breakage rate.
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
Small steel ball to add just the first time and with the ball. Because, when the normal operation of the ball mill and ore, steel and reasonable friction between ball mill lining board, will make abrasion increases, in the small ball mill, ball mill for ball. So usually under normal circumstances, do not need to add ball. Add ball is no monomer dissociation in the useful mineral particle size when the fineness of grinding machine can not meet the flotation demand, can add a little ball. Wear of steel ball mill in the process of operation continuously, in order to keep the ball charge filling ratio and the ball of the reasonable proportion, maintain the stability of ball mill operation, must be reasonable for the ball, DiChang wear.
Steel ball add weight, it is according to the quality of the steel ball, steel ball quality, determines the ore tons of adding consumption, had better use the new wear-resistant steel ball, such as using the train wheels with special processing of forging steel ball on the wear-resisting.
New installation of the ball mill has a run-in period, in the running-in process, the amount of steel ball for the first time to add, 80% of the maximum loading ball of ball mill, the proportion of steel ball added can be according to the size of steel ball (Φ 120 ㎜, 100 ㎜ Φ, Φ 80 ㎜, 60 ㎜ Φ, Φ 40 ㎜) size added. Different models of its ball mill ball quantity is different. For example MQG1500 x 3000 largest ball mill ball quantity 9.5-10 tons. For the first time to add steel ball ball (120 ㎜ and 100 ㎜) accounted for 30%, 40%, Reasons of the ball aging the ball 80 ㎜ accounts for 40%, 30%, small ball (60 and 40 ㎜) accounted for 30%.
Why in the process of ball mill in ball mill ball only add 80%,because after installation of ball mill, ball mill need mesh size, capacity are to be gradually increased, with ball mill normal running in two or three days in a row, pick up to check the size of the gear meshing, everything is all right, open the add the remaining 20% steel ball mill manhole covers the second.
High chrome steel ball is mainly used in grinding machine mining condition is relatively poor metal processing industry, mines and thermal power energy.
Low chrome steel balls are widely used in cement industry, chemical industry, power plants, and other fields
Golden ball mill with chromium wear-resistant alloy cast steel balls of ball mill features: high hardness, low wear, Quality index of high chromium steel good toughness and do not break round, broken. Widely used in cement, chemical fertilizer, silicate products, new building material, refractory material, black and non-ferrous metal ore dressing and glass ceramics production industry, etc. In use process, the ball will further improve the surface hardness, wear resistance, and can improve the grinding machine production capacity, improve the cement specific surface area and recovery. Proved by many users, the factory of the wear resistant chromium alloy cast steel ball could keep higher grinding efficiency for a long time, the relative stability of the ball diameter and size distribution, is advantageous to the production of ball mill, stability and improve quality, reduce the ball, a clearance.
Steel ball which are made by skew rolling mill in cement mill during normal operation, every tons of cement production: consume 70 grams or less, low chrome steel ball single storehouse broken rate of 1% or less; High consumption of 30 grams or less chrome steel ball single storehouse, broken rate of 1 ‰ or less. Low chromium consume 80 grams or less forging single storehouse, broken rate of 1.5% or less; High chromium forging single storehouse consumption of 40 grams or less, breakage or less 5 ‰. In coal-fired power plant of the normal operation of coal mill, grinding coal per ton: consume 150 grams or less, low chrome steel ball single storehouse broken rate of 1% or less; High chrome steel balls single warehouse cost 60 grams, or less breakage rate of 1 ‰ or less. In metallurgy, mining,characteristics of forging production chemical and other industrial and mining enterprises according to the buyer conditions to determine the steel ball attrition and breakage rate.
2015年5月6日星期三
Three factors of Choosing forging grinding balls
Three factors of Choosing forging grinding balls
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
In the field of powder engineering industry, for forging steel ball are familiar with this new type of wear-resistant materials.It not only has the good performance-to-price ratio, and smooth surface , compact structure, high impact toughness, good wear-resisting performance.In addition, because it has the character of steel, steel ball also has a uniform hardness, no breakage, abrasive resistance, high impact value, using integrated high efficiency etc.
As the forging steel ball is used more and more widely, so how to choose the appropriate forging steel ball?What kind of factory is appropriate?There are three main factors, respectively quality, price and after-sales, the following specification about them.
Quality, it is one of the most important distinguishing factor of choosing the forging steel ball .The quality of the forging steel ball is required,it will be eliminated if can not meet the corresponding requirement , which from another aspect reminds manufacturers should pay attention to the quality of the product.
Price, the price is not only important for forging steel ball factory, the purchaser.For purchasing ,lower price, more better, but from the forging process of steel ball, it is impossible.Thus the price of forging steel ball are questionable.
Purchaser is more worried about after-sales, because forging steel ball is high consumption product, high quality and perfect supporting services can ensure good use of steel ball.
If we can do, it has great hope to win orders.
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
In the field of powder engineering industry, for forging steel ball are familiar with this new type of wear-resistant materials.It not only has the good performance-to-price ratio, and smooth surface , compact structure, high impact toughness, good wear-resisting performance.In addition, because it has the character of steel, steel ball also has a uniform hardness, no breakage, abrasive resistance, high impact value, using integrated high efficiency etc.
As the forging steel ball is used more and more widely, so how to choose the appropriate forging steel ball?What kind of factory is appropriate?There are three main factors, respectively quality, price and after-sales, the following specification about them.
Quality, it is one of the most important distinguishing factor of choosing the forging steel ball .The quality of the forging steel ball is required,it will be eliminated if can not meet the corresponding requirement , which from another aspect reminds manufacturers should pay attention to the quality of the product.
Price, the price is not only important for forging steel ball factory, the purchaser.For purchasing ,lower price, more better, but from the forging process of steel ball, it is impossible.Thus the price of forging steel ball are questionable.
Purchaser is more worried about after-sales, because forging steel ball is high consumption product, high quality and perfect supporting services can ensure good use of steel ball.
If we can do, it has great hope to win orders.
2015年5月5日星期二
Hot-rolled steel ball advantage
Hot-rolled steel ball advantage by skew rolling mill(machine):
http://www.skewrollingmill.com info@skewrollingmill.com
Our Hot rolled steel ball with precise dimensions, round geometry, high hardness and good mechanical properties and with high wear resistance, no distortion, no cracking of excellent quality.
Its characteristics as following:
1, High overall hardness: the surface hardness can reach 55-65HRC, volume hardness can reach 50-62HRC, and the hardness gradient distribution even.
2, High impact toughness: toughness greater than 12J/cm2.
3, Low broken rate: anti-peel broken and anti-crushing performance is more than 10 times the normal casting and forging steel balls, falling ball impact more than times 20,000, while the actual breakage rate less than 1%, close to no broken. Hot rolling steel ball adopted in all kinds of ball ferrous and nonferrous metals processing plant mines, power plants, cement plants, refractory plants and other industries.
2, High impact toughness: toughness greater than 12J/cm2.
3, Low broken rate: anti-peel broken and anti-crushing performance is more than 10 times the normal casting and forging steel balls, falling ball impact more than times 20,000, while the actual breakage rate less than 1%, close to no broken. Hot rolling steel ball adopted in all kinds of ball ferrous and nonferrous metals processing plant mines, power plants, cement plants, refractory plants and other industries.
Hot rolled steel ball technology
Hot rolled steel ball technology:
http://www.skewrollingmill.com info@skewrollingmill.com
Ball diameter range Φ20-Φ150mm. Rolling ball milling is used in a variety of chemical composition billets rolled round bars, its diameter is equal to the nominal diameter of the ball. The main production process of hot rolling steel ball as follows:
1, After the round bar examination, by length cut into steel ball billet.
2, The steel billet heated to a suitable temperature in a continuous heating furnace before rolling.
3, After the red-hot state steel billet feeding into the ball mill, forward rotation in between special spiral grooved rollers, and is continuously rolled into a ball. Each steel skew ball mill can roll 60-360 steel ball per minute.
4, The red hot ball rolled into special designed online heating treatment furnace for quenching – tempering heat treatment, so can get high uniform hardness ball.
5, After inspection steel balls sent to the finished goods warehouse, after packaging then sent to customers.
1, After the round bar examination, by length cut into steel ball billet.
2, The steel billet heated to a suitable temperature in a continuous heating furnace before rolling.
3, After the red-hot state steel billet feeding into the ball mill, forward rotation in between special spiral grooved rollers, and is continuously rolled into a ball. Each steel skew ball mill can roll 60-360 steel ball per minute.
4, The red hot ball rolled into special designed online heating treatment furnace for quenching – tempering heat treatment, so can get high uniform hardness ball.
5, After inspection steel balls sent to the finished goods warehouse, after packaging then sent to customers.
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