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What factors affect the grinding performance of a ball mill?

2022-06-07 14:23:53
When you think of ball mills, what can you think of? What is the ball mill mainly used for? Next, I will introduce you to Baichen Ball Mill from several aspects.
Ball mill is a kind of high-fine grinding machine widely used in industrial production. There are many types of ball mills, but we commonly use dry ball mills, wet ball mills, energy-saving ball mills, cement ball mills, overflow ball mills, ceramic ball mills, etc.
Ball mills are suitable for grinding various ores and other materials. Widely used in mineral processing, building materials, chemical and other industries.
A ball mill is a type of pulverizer. The dry ball mill is equipped with a cylindrical rotating unit and two silos. The discharge opening is straight. There are also air intake devices, dust exhaust pipes, dust collectors, etc.
So, what are the performance and working efficiency of the ball mill?
1. From the material point of view, the grindability of the ore, the particle size of the feed, the fineness of the product, etc.
Different ores have different grindability; the harder the ore, the worse the grindability, and the lower the productivity of the ball mill; but, when the ore is soft, the grindability is good, and the productivity of the ball mill is high. When feeding ore, if the ore particle size is too small or the proportion of large pieces is too small, the impact force of grinding will be insufficient, which will not only reduce the grinding efficiency but also accumulate stubborn stones in the ball mill.
If the feed particle size is large, the time for grinding to the specified fineness will be prolonged, and the grinding efficiency will also be reduced. Also, the mineral composition of the feed ore also has a significant effect on the grinding process.
2. Omit structure, the structure, size, liner structure, liner material, etc. of the ball mill.
The diameter and length of the ball mill determine the effective volume of the ball mill and limit the production capacity of the ball mill. The diameter of the ball mill determines the flow path and capacity of the pulp, and the length of the ball mill determines the grinding time of the material, that is, affects the grinding fineness.
The structure and material of the liner affect the motion state of the grinding media. Uneven liners are more productive than smooth liners. The excessive thickness of the liner will reduce the effective volume of the ball mill, thereby reducing the production efficiency of the ball mill. After the liner is worn, the diameter of the ball mill increases. If the ball amount is not increased at this time, the medium filling rate will be low and the productivity will be lowered. It can be seen that it is very important to optimize the internal structure of the ball mill.
3. From the aspects of working conditions, feeding system, material-to-ball ratio, ball mill speed, grinding concentration, etc. Carrier of energy transfer and implementation of crushing force.
For ball mills, if the medium filling rate is too large or too small, the grinding effect will be affected. If the filling rate of the medium is too small, the ball mill is in an empty grinding state; if the filling rate is too large, the ball mill is bulging. If the material-to-ball ratio is too small, it means that the material to be ground in the ball mill is too small, which will not only reduce the processing capacity of the ball mill but also increase the direct impact and grinding between the ball mills. Between the medium and the medium and the lining plate, increase the amount of scrap steel; if it is too large, it means that there is too much material in the ball mill, which will affect the movement of the grinding medium and the circulation of the material in the ball mill, and also reduce the processing capacity of the ball mill.
The factors that affect the performance and efficiency of a ball mill are far more than these, and each factor also affects the other. Thus, it is recommended to conduct a detailed study of all aspects and materials of the ball mill in the test stage, select a reasonable ball mill, and rationalize the economic benefits.