高压辊磨机粉碎贫赤铁矿产品粒度特性  

Product Size Characteristics of Low-Grade Hematite in High Pressure Grinding Roll

作　　者：袁致涛[1] 刘磊[1] 严洋 韩跃新[1] 

机构地区：[1]东北大学资源与土木工程学院,辽宁沈阳110819 [2]成都利君实业股份有限公司,四川成都610045

出　　处：《东北大学学报（自然科学版）》2011年第6期875-878,共4页Journal of Northeastern University(Natural Science)

基　　金：中央高校基本科研业务费专项资金资助项目(N100401007)

摘　　要：研究了贫赤铁矿经高压辊磨机开路、边料循环闭路和筛分全闭路粉碎后产品的粒度特性.试验结果表明:随着辊面压力的增加,粉碎产品粒度降低,分布更加均匀,破碎比F50/P50的增长速率高于破碎比F80/P80和F20/P20的增长速率;随着边料循环量的增加,粉碎产品的粒度降低,分布更不均匀,破碎比F80/P80的增长速率高于破碎比F50/P50和F20/P20的增长速率;采用全闭路粉碎时,高压辊磨机与颚式破碎机相比,破碎比明显增大,粉碎产品细粒级含量高,粒度分布均匀.This paper studied the comminuted hematite product size characteristics in different processes of high pressure grinding roll（HPGR）,including open circuit operation,closed circuit operation with edge product recycles and classification. The results showed that with the specific pressing force increased,the fineness of products decreases and the size distribution becomes more uniform owing to a higher increasing ratio of the F50/P50 reduction ratio than that of the F80/P80 and F20/P20 reduction ratio.The fineness of products decreases with the increasing of edge product circulating mass,while the size distribution becomes more non-uniform resulting from a higher increasing ratio of the F80/P80 reduction ratio than that of the F50/P50 and F20/P20 reduction ratio.Compared with jaw crusher,HPGR gives a higher reduction ratio and more fines in the process of closed circuit and produces a more uniform particle size distribution.

关 键 词：高压辊磨机 贫赤铁矿 粒度特性 破碎比 

分 类 号：TD451[矿业工程—矿山机电]