(1) Improper selection of ball mill liner material. Improper selection of the material of the liner will greatly reduce its fatigue strength and life, not only cannot meet the operating requirements of the ball mill, but also plastic deformation or bulging may occur.
(2) The ball mill is not operating normally. When the ball mill is in an abnormal operation state, it will increase the wear of the liner. In the normal operation of the ball mill, the steel balls are mixed with the materials. When the steel balls are dropped, they often do not directly impact the liner, but are blocked by the materials mixed with the steel balls, which can protect the liner. However, if the ball mill is running under low load, the steel balls will directly hit the liner, causing serious wear of the liner and even breakage.
(3) The running time of the ball mill is too long. The ball mill largely determines the processing capacity of the beneficiation plant. It is a high-efficiency equipment in the beneficiation plant. However, if it is not maintained and maintained in time, it will aggravate the wear and aging of the protective pad and liner.
(4) Corrosion in wet grinding environment. Concentrators generally use wet ball mills, and some adjusters for flotation operations are usually added during grinding operations, so that the slurry in the ball mill has a certain degree of acidity and alkalinity, and acid-alkaline slurry usually accelerates the corrosion of wear parts.
(5) The material of the lining board and the grinding ball does not match. There is a hardness matching problem between the liner and the grinding ball. The hardness of the grinding ball should be 2~4HRC higher than that of the liner. For example, the ball mill liner is made of high manganese steel, and the use of high chromium cast iron (steel) with excellent wear resistance for the grinding ball will increase the wear of the high manganese steel liner.
Post time: Oct-29-2021