Comparation between casting ball and skew rolling ball
skewrollingmill@yeah.net
The disadvantage of the casting ball production manufacturing technique：
1、The essence of the casting ball is pig iron, After adding a large amounts of chromium element (13-28%), achieving the requirement of the grinding ball
2、The casting ball is organization loose, coarse grain, Wear-resisting performance is relatively poor, Impact toughness is poor
3、High energy consumption, pollution, the labor intensity of workers, low labor productivity.
4、High cost of raw materials,High wage costs, expecially diameter under F50mm casting ball, Its cost is higher.
Relative to the ball,Hot skew rolling steel ball is a new kind of rolling technology, It is the grinding steel ball manufacturing technology breakthrough, It gradually replaces casting ball,The features of the hot skew rolling steel bal is as following:
1、Hot skew rolling steel ball has all advantages of steel, Becoming high quality grinding steel ball after heat treatment.
2、Efficient production,large production,skew rolling steel ball production mechanization,high degree of automation, No manual operation of production.
3、Stable quality,hardness and hardenability good,metallographic structure densification, Grain size small, Wear-resisting performance is good, Its abrasion is half of the casting ball,Impact toughness is as high as 12-35J/cm2 , Broken rate is less than 0.1%
4、Low energy consumption, non-pollution, The intensity of labor is low, The production cost is low, in the long term,Casting ball will inevitably be replaced by skew rolling steel ball.
The Ball Mill Filling Ratio Automatic Detection System
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
Ball mill is the main equipment of ore dressing process, and it is widely used in mining, metallurgy, building materials, refractory, cement, chemical and thermal power industry.
With the rapid development of all walks of life, the ball mill is used more and more widely. There are many factors affecting the working effect of ball mill, and the grinding ball filling ratio is a major parameter of grinding of ore. In the grinding process, grinding mill is mainly rely on the role of media to complete the grinding task, and whether the medium filling rate is reasonable or not is the first factor to affect productivity. The accurate detection can make the mill capacity and energy efficiency improved obviously on the mill ball loading rate. For ball mill, load detection is usually to be stopped after the mill, open mill shell manhole cover and people entering the mill to obtain measurement and calculation of the filling factor.
If these works are not consistent with the maintenance plan of mills, it will seriously affect the technical and economic index of mill. In the working process of the ball mill, the adding of balls is carried out in advance according to the work plan and this plan is known to be grinding material medium consumption index compiled. Due to the raw material of no stable mechanical properties and medium quality, and the crushing medium unit consumption in the wide range is also changing, which may not be stable. Therefore, in the long time of mill work according to the original plan to maintain the simplified inside medium rate value will be difficult, the result is not the medium rate inadequacy is medium filling rate is too high. Because the major impact of machine inside medium rate of mill power and productivity, the actual production of medium filling rate is difficult in dynamic stability. Therefore, on one hand, according to the dynamic wear medium make the timely, scientific and reasonable way of adding, so that to make medium filling inside the mill rate stable at a reasonable level; on the other hand, it is to find the dynamic parameters of the medium filling rate regular and accurate as well as simple and convenient measuring method to guide the media timely supplement, and the mill power and productivity to maintain high level operation. The main problem of artificial detection is to detect the mill load shut down, and this will affect the continuity of production and product quality, reduce the operation rate of the instability of the mill, and mill frequent startup will also lead to the increase of power consumption. Therefore, the research on a high degree of accuracy and good cost performance of mill medium filling rate automatic detection is very important.
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.
How to make an accurate analysis of the market situation of coal grinding machine steel industry development
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
For accurate analysis of the market situation of coal grinding machine steel industry development,grinding balls it requires a combination of industry’s supply and demand relations changes over the years and predict and analysis ball mill industry’s development trend with the combination of qualitative and quantitative. So as to provide authoritative, sufficient, reliable decision basis for the enterprise development strategy, investment decision-making and enterprise management.
We need to make a survey and analysis of the following contents:
Induction of the model of industry chain, definition of industry chain, steel ball definition of industry chain, content of industry chain, industry chain type and industrial chain model.
"Potter's five forces model” analysis of ball mill industry environment: the existing competition among enterprises, potential entrants, substitute threat analysis, analysis of the bargaining power of suppliers and the bargaining power of customers.
Environment analysis of the development of coal machine grinding ball market; ball rolling strength analysis of the development of the industry, weak analysis of the development of the industry development, development opportunity of the industry, development threat of the industry.
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Email: info@skewrollingmill.com
For accurate analysis of the market situation of coal grinding machine steel industry development,grinding balls it requires a combination of industry’s supply and demand relations changes over the years and predict and analysis ball mill industry’s development trend with the combination of qualitative and quantitative. So as to provide authoritative, sufficient, reliable decision basis for the enterprise development strategy, investment decision-making and enterprise management.
We need to make a survey and analysis of the following contents:
Induction of the model of industry chain, definition of industry chain, steel ball definition of industry chain, content of industry chain, industry chain type and industrial chain model.
"Potter's five forces model” analysis of ball mill industry environment: the existing competition among enterprises, potential entrants, substitute threat analysis, analysis of the bargaining power of suppliers and the bargaining power of customers.
Environment analysis of the development of coal machine grinding ball market; ball rolling strength analysis of the development of the industry, weak analysis of the development of the industry development, development opportunity of the industry, development threat of the industry.
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)Youtube https://www.youtube.com/channel/UCGZ1mhhPeyBshSf8slJ6BFg/videosPinterest https://www.pinterest.com/skewrollingmachFacebook https://www.facebook.com/skewrollingmachineEmail: info@skewrollingmill.com China's domestic grade of magnetite ore are low, mostly around 10%, grinding balls while the market for iron concentrate grade 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 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.
Whether the forged steel ball is more suitable for wet grinding or dry grinding?
Suchuang Machinery Equipment Co., Ltd(http://www.skewrollingmill.com)
Youtube https://www.youtube.com/channel/UCGZ1mhhPeyBshSf8slJ6BFg/videos
Pinterest https://www.pinterest.com/skewrollingmach
Facebook https://www.facebook.com/skewrollingmachine
Email: info@skewrollingmill.com
With the development of wet ball mill, advantage of forged steel ball is more and more obvious. Compared with casting ball, forging steel ball has all the advantages of steel. After heat treatment, it becomes ball milling of high quality. Suchuang Machinery Equipment Co., Ltd is a professtional manufacturer of automatic production line, which reduce the production cost and improves the production efficiency.
The ball mill can be divided into dry ball mill and wet ball mill according to the material’ wet and dry.
Dry ball mill has been widely used in cement, silicate products, new building materials, refractory materials, chemical fertilizer, black and non-ferrous metal processing and the glass ceramic production industry. In 1950s, about 70% are dry ball mill in foreign countries. With the progress of technology, as well as to the energy saving and environmental protection have become increasingly demanding, wet ball mill is developing rapidly, which now accounts for more than 75% of the total of ball mill.
Hot skew rolling mill industry standard steel ball black (YB/T 091-2005) specializing in the production of various specifications of hot skew rolling mill. The ball diameter range of Φ 20- Φ 70mm. Skew rolling mill is used in hot rolling round steel of various chemical ingredients. Hot rolled steel ball production process is as follows:
1.After testing, round steel bar is sheared into steel ball billet according to the specified length.
2.Before skew rolling, steel ball billet is in continuous heating furnace to be heated to a suitable temperature.
3.After fed into the skew rolling mill, red hot billet rotate and move between the 2 special spiral groove roller, and is continuously skew rolled into a ball.Milling and grinding media Each ball mill per minute can roll 60-360 balls.
4.The rolling red hot ball immediate access to online heat treatment equipment, which is special design of the factory to under quenching and tempering heat treatment, so that the ball was very high and even hardness.
5.Qualified products are sent to the finished goods warehouse and packed to the customer.
