为了降低磁选厂球磨机的磨矿介质单耗,改善磨矿工艺,提高选别技术经济指标,不断增加选矿厂的经济效益,鞍钢矿山公司研究所、科技处、供应处、大孤山选矿厂和安徽宁国耐磨材料总厂等单位组成联合试验组,从1989年8月开始,在大孤山选矿厂磁选车间5台φ2700×2100mm溢流型磨机中第二段磨矿使用宁国产φ35×45mm低铬铸段柱塞状异形磨矿介质代替φ60mm中锰稀土铸铁园球状磨矿介质开展工业试验研究,历时8个月,试用量 In order to reduce the magnetic separator mill mill unit consumption, improve the grinding process, improve technical and economic indicators sorting, and continuously increase the economic efficiency of concentrator, Anshan Iron and Steel Company Institute, Technology Department, the Department of Supply, Dagushan Concentrator And Anhui Ningguo wear-resistant materials Plant and other units to form a joint experimental unit, from August 1989 onwards, in the Dagushan Concentrator magnetic separation plant 5 sets of φ2700 × 2100mm overflow mill in the second paragraph of the use of grinding rather Nanjing φ35 × 45mm low chrome cast iron plunger piston shaped grinding media instead of φ60mm manganese rare earth cast iron ball mill grinding media to carry out industrial test research, which lasted 8 months, the trial volume