How to discern the steel ball quality of ball mill

The steel ball is grinding media of ball mill, through the crash friction between steel ball and material generated stripping effect, is important basic components. The output of the ball mill is not only affected by the loading capacity of the steel ball but also relates to the diameter of the steel ball. Requires a certain ball diameter and different ball diameter to maintain a certain proportion of the ball, then there are two important indicators to judge whether the ball is wear-resistant: ball hardness and ball density. 1. Factors of ball hardness: In general, as the hardness increases, as long as does not occur the crushing, the unit consumption of the ball decreases; But also the ball deformation is small, more energy can be used to crush the mineral particles, it can increase the productivity of the mill. However, the increase in hardness of the ball can only be modest, there is a proper range, the harder is not the better. If you consider only the ball consumption, the higher the hardness lower consumption. Ball hardness is too high on the grinding is negative. Ball rebounce serious, causing some energy loss during the rebound, so ball energy is not used more for crushing, and it will affect the broken; If the ball hardness is too high, when the ball and the ball contact each other sliding powerful, can not effectively kerchief live ball between the ball, so that the grinding effect of mineral particles weakened. In general, a ball of the same size, large density ball have large productivity, small density ball have low productivity. 2. Factors of ball density: (1) Material effects, steel, cast iron, alloy steel, etc. Different materials have different density, the density of steel is higher than that of cast iron. Alloy steel is based on the major elements of the alloy density and content of different. (2) Ball manufacturing methods. Rolled and forged steel ball have dense structure, so the density is high, Cast steel balls, cast iron balls or cast alloy balls and other organizations less dense, even there are pores, so the density of smaller. (3) Ball microstructure. Martensite, austenite, bainite, ferrite and other different crystal structures are not the same density, also affect the fineness of crystallinity.