iron separator machine

PTMS MAGNETIC SEPARATOR

what is magnetic separation in Kaolin？

The ball mill is an indispensable equipment for the concentrator, and it is also a considerable investment in the construction of the concentrator. Therefore, it is very important to ensure the milling efficiency and service life of the ball mill. Among them, the ball mill liner, as an important part of the ball mill, can not only effectively protect the barrel of the ball mill, but also improve the impact and grinding between the medium and the material to improve the milling efficiency. However, under the long-term operation of the grinding mill lining, the lining wear is too fast. So what's the problem, what are the reasons for the ball mill liner to wear too fast? How does the application respond or improve?

1. Mutual wear of ball mill liner and steel ball The ball mill liner and steel ball are all wearing parts. During the grinding process, the ball mill ball and the material are thrown in the cylinder, and the ball mill liner and steel The ball and the material will collide with each other to generate friction. In continuous operation, ball mill liners and steel balls can experience severe wear and tear, which is directly related to the hardness of the material. The greater the hardness of the material, the faster the wear rate of the ball mill liner and the steel ball, which may cause equipment damage or even cause safety accidents. In addition, it is also related to the ball mill steel ball. The size of the steel ball and the number of steel balls will affect the service life of the ball mill liner. If the ball mill is in operation, increasing the amount of steel balls or filling the steel balls with larger diameters will increase the wear of the ball mill liner.

Coping method: Reasonable selection of ball mill liner and steel ball is one of the main ways to reduce the excessive wear of the liner. First, the relevant staff needs to know the ratio of the ball mill liner to the steel ball, and select the corresponding steel ball size and quantity according to the ratio. In general, the hardness ratio of the liner of the conventional ball mill to the steel ball is about 1:0.8. Second, it is necessary to control the ratio of the material to the steel ball, and the material is twice as large as the steel ball. Third, when choosing a ball mill, it is necessary to select a suitable ball mill liner according to the type of mineral, control the hardness of the ball mill liner and the steel ball, and make a reasonable match between the steel ball and the liner.

2, ball mill liner material is unreasonable ball mill liner material and its heat treatment process is the key to determine the mechanical properties of the liner, if the improper selection of liner material will greatly reduce its fatigue strength and life, not only can not meet the requirements of the ball mill There may even be plastic deformation or drumming.

Coping method: Select new wear-resistant lining material. Currently used ball mill lining materials are high manganese steel, high chrome steel, alloy steel and wear resistant rubber. Among them, the wear-resistant rubber is a lining material that has emerged in the past 10 years. The composite liner can be formed by using wear-resistant rubber and alloy steel, which not only improves the toughness of the liner but also solves the contradiction between toughness and rigidity.

3. The heat treatment process of the ball mill liner is unreasonable. The heat treatment of the ball mill liner is unreasonable, which not only increases the wear phenomenon of the liner, but also affects the yield strength of the liner, which causes the ball mill bolt to break under the action of large shear force. In the actual operation, the staff lacks the understanding of the material of the liner, and the heat treatment of the ball mill liner is insufficient. Therefore, the strengthening effect of the ball mill liner is not in place, the strength is low, and the plastic deformation often occurs when the steel ball and the material are impacted. phenomenon.

Coping method: pre-treatment of the ball mill liner can effectively reduce the wear of the ball mill liner, and select a suitable pre-treatment process according to the liner material.

4. If the ball mill is not working properly, the ball mill will be in an abnormal operating state, which will also have adverse effects on the ball mill liner. When the ball mill is in normal operation, the steel ball is mixed with the material. When the steel ball is thrown to the lining plate, a barrier is formed between the steel ball and the material to play a buffering role, and the material is gradually ground. If the ball mill is running at low load, the steel ball will directly impact the lining, causing severe wear and even breakage of the ball mill lining.

Coping method: The relevant staff needs to know the running state of the ball mill and control the running state of the ball mill. When the ball mill is running under low load condition, it is necessary to adjust the amount of the ball mill in time to ensure the grindability of the material.

In addition to the four causes of wear described above, the design, manufacture and installation of the ball mill liner is one of the reasons that affect the wear of the ball mill liner too fast. To improve the efficiency of the ball mill liner, it is necessary to analyze the cause of the liner wear. In order to develop a reasonable solution.