What are the causes of ball mill liner wear?

Ball mill liner is an important wear parts, mainly used in mining, cement, chemical and other fields of abrasive friction equipment, such as ball mills, mining crushers. The main function of the ball mill liner is to protect the grinding stone and the grinding cylinder from wear. The wear of the ball mill liner is a common problem, which not only reduces the production efficiency of the equipment, but also increases the maintenance and replacement costs. This paper will discuss the causes of wear of ball mill lining plate.

Material mismatch between grinding stone and grinding cylinder

Grinding stone and grinding cylinder are the key components of ball mill. The matching degree of grinding stone and grinding cylinder directly affects the friction and wear degree between them. If the hardness of the grinding stone is greater than that of the grinding cylinder, the friction force will increase, resulting in wear; if the hardness of the grinding stone is less than that of the grinding cylinder, problems such as loosening of the grinding stone will occur, resulting in increased wear.

The quality of the grinding stone is unqualified

The grinding stone should undergo strict abrasive screening and mixing to ensure that the grinding stone has uniform particle size and moderate hardness, otherwise it will cause wear. If the grinding stone contains too many inclusions or the particle size is uneven, it will cause the collision and wear between the grinding stones.

The quality of the grinding stone assembly is unqualified.

The grinding stone in the ball mill must be assembled in the right position to play the effect. If it is not assembled properly, it will cause wear. For example, the wrong installation of the grinding stone position will cause the grinding stone to collide and cause wear; if the grinding stone spacing is too large, the grinding stones will collide with each other and increase wear.

Uneven density and filling of grindstones

In the ball mill, the density and filling of the grinding stone also have a great influence on the wear. If the density of the grinding stones is uneven and there are too many grinding stones in some areas, the contact area between the grinding stones will increase, which will cause wear. In addition, if the filling of the grinding stones is uneven, the amount of grinding stones in some places is too small, which will cause the wear area to be concentrated.

The quality of the inner wall of the grinding cylinder is not good.

The wear of the ball mill liner may also be related to the quality of the inner wall of the grinding cylinder. If the hardness of the inner wall of the grinding cylinder is not enough, it will cause wear. In addition, if there are defects in the inner wall of the grinding cylinder, such as cracks, depressions, etc., it will cause the grinding stone to be swept away, and the wear will be different in different positions.

Ore contains inclusions

In the ore, may contain some inclusions, such as sand, gravel, etc. If these inclusions enter the ball mill, they will collide with the grinding stone, resulting in wear. At the same time, inclusions may also cause other equipment failures.

Poor quality of ball mill liner

The quality of the ball mill liner is also an important factor in wear. If the ball mill liner material is not good, the quality is not qualified, then the wear will increase. In addition, the installation process of the ball mill liner will also affect its performance. If the ball mill liner is installed improperly, it will also cause wear.

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