The effect of the ball mill'ball quality
Author : RuiGuang Time : 2013-10-25 Click :
For ball mill, good or bad quality ball quality not only affects productivity , but also affect the level of consumption of the ball , thereby affecting the grinding media costs. The simple pursuit of high hardness low consumption is wrong. High hardness and low consumption does not mean low cost, high hardness, low consumption of the ball that often the price high. High hardness does not necessarily increase the productivity , or even decline , only the high productivity of the consumption index can be dropped , so choose should be the primary criterion for ball mill grinding medium and large productivity and low cost. Only high productivity and low cost of grinding media in order to have a good economic benefits. Economic benefit is the enterprise survival and development of the necessary conditions.Select the ball , there are two problems is often overlooked. 1 ball is not the harder the better , but has its proper hardness values ; 2 . Ball density is also a problem can not be ignored . About hardness , in general , with the hardness increases , as long as no crushing , ball consumption decreased ; but also enable sphere deformation, crushing the ball in small to absorb deformation energy , more energy can be used for crushing ore grains , can increase the productivity of the ball mill . But the ball hardness only modest increases , there is a proper range , not the harder the better . If you only consider the ball consumption, the higher the hardness of the lower consumption . However, the productivity of the ball mill , in the certain range productivity increases with increasing hardness of the ball , when the hardness exceeds a certain range adversely affect the productivity of the mill , the mill productivity. When high hardness steel ball grinding negative for two reasons: 1 . Ball rebound beating severe springback caused in part of the energy losses, the energy is not more balls used for crushing , and therefore impact crusher ; 2 ball hardness is too high , the contact between the ball and the ball sliding when severe , can not effectively engage the ball between the mineral particles to live , so that grinding of mineral particles weakened . Various types of ore balls exists an optimum hardness , but the hardness of various ores that are different from the optimum value .
Density of the grinding balls on impact , in general, the same size ball density large productivity , the productivity of small density . Ball density is affected by three factors: 1 . Material influence , steel , cast iron , alloy steel , of different materials of different densities , the density of steel than cast iron large , steel is the main alloying element according to different content and different densities and