Steel ball is a core condition for the working of ball mill; a better and deeper understanding of the specific gravity, size, material, hardness of the ball mill steel ball is conducive to optimize working efficiency.
Steel ball is the major grinding media in ball mill, the larger the proportion and size of the steel ball, the better the impact effect. If the steel ball has a better wear resistance and larger hardness, its grinding capacity will be correspondingly stronger; when grinding ore which has good abrasion resistance and dense structure, we’d better chose the ball whish has large specific gravity and size. However, in order to effectively strip fine ore and increase hammering times in unit time, it is required to increase the balls.
The proportion hardness, composition and toughness of steel balls are the main technical indicators of the steel ball, in accordance with the standard requirements, the specific gravity of forged steel ball and rolling ball is 7.8, the proportion of steel ball and cast iron ball is 7.5. If there are too many sand holes, the proportion can be reduced to 7.1.
Although cast iron ball contains high C, the hardness is below standard, the phenomenon of trachoma hollow and small proportion is more serious. Ball quality and grinding effect are significantly reduced. Thus, choose forged steel or cast steel ball which has high hardness and good toughness is more appropriate.
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