Ideal structure and hardening property of cement Grinding liner

- Nov 15, 2018-

The ideal structure of the cement mill liner to a certain extent effectively includes high hardness alloy carbides and carbides spheroidization. In metal materials, high hardness alloy carbides are often obtained by adding some carbides to form elements. This is an effective way to improve the wear resistance of materials. This is due to the uniform distribution of carbides in the matrix, which reduces the stress concentration around the carbides, reduces the chance of crack initiation and avoids the spalling of carbides. At the same time, the ball-shaped carbides can block ploughing wear and reduce the depth and length of ploughs. Thus protecting the matrix.

To some extent, cement grinding linings require that the alloy carbide in the material be spheroidized and uniformly distributed. The strong and tough matrix and the high hard alloy carbide need to be supported by a strong and tough matrix, otherwise, the alloy carbides will flake off easily. The wear resistance of the material will be greatly weakened. Martensite lower bainite is a very good matrix structure. The existence of a small amount of retained austenite reduces the stress of heat treatment, improves the toughness of the material, and reduces the possibility of cracking in the process of production and use.

The cement mill liner has been applied to the ball mill of Panshigou Iron Mine and Tonghua Copper Mine in Tonghua Iron works. The relative wear resistance of the cement mill liner is 1.64 times that of the high manganese steel in grinding magnetite. The relative wear resistance of copper ore is 1.48 times higher than that of high manganese steel. The main reason for the improvement of wear resistance of this material is that it has better working-hardening performance than ordinary high manganese steel in ball mill, and it meets the special technical requirements of the cleaning method.