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Finally,we also can change the shape of a ball.We can consider to choose oval instead of round steel ball.Oval ball has a strong impact, it can reduce the crushing, large surface area, reduce liner wear, etc. In a word, ellipsoid compared with sphere, can make the crushing and grinding capacity of mill is greatly improved, but at the same time also have corresponding to equipment wear and tear.Therefore,ball mill can through the above reform achieved the purpose of saving energy and reducing consumption.In the appropriate range increasing the hardness of steel ball can increase the production efficiency of ball mill. On the impact of steel ball for grinding density,the same size of ball has small productivity and big size of ball has big productivity.Hongxing New Materials Technology Co.,Ltd. is a professional manufacturer and exporter of grinding balls in china,the diameter of our steel balls span from 20mm-150mm. Priorities of our steel balls: High hardness, good wear resistance, breakage rate lower than 0.5%, no deformation all through. Our modern quality assurance center could guarantee all our products meeting customers" need.Secondly ,to strive to increase the rate of filling and rotating velocity of the body.Experiments show that the steel ball filling rate at 45% when the grinding mills load is the largest, more than 45% with the increase of the filling rate of the load declined dramatically.Therefore, according to the actual need to select a reasonable ball filling rate to ensure the best grinding effect.The ore gradually is grinded and crushed under the action of impact. The steel ball is one of the major parts of ball mill. Its different degrees of hardness and density have a great effect on production efficiency of ball mill.The ball mill motor drives the cylinder through the reduction gear. The crushed ore and steel balls rotate in the cylinder and are forced by friction and centrifugal. Then the materials fall by gravity after taken to a certain height by lining board.powder grinding equipment: http://www.info-crusher.com/goods/product-list.html