永磁强磁预选设备的研制与应用  

Development and Application of High-Intensity Permanent Magnetic Separator for Pre-concentration

作　　者：袁致涛[1] 高太[1,2] 郭小飞[1] 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110004 [2]齐大山铁矿,辽宁鞍山114043

出　　处：《东北大学学报（自然科学版）》2010年第8期1187-1191,共5页Journal of Northeastern University(Natural Science)

基　　金：国家高技术研究发展计划项目(2007AA06Z127);科技部国际合作计划重点项目(2006DFB72570)

摘　　要：采用新型永磁材料Nd-Fe-B和挤压式磁系设计研制了永磁强磁预选设备,传送带表面磁感应强度可达1.0 T,磁场梯度最高可达68 mT/mm.对齐大山铁矿极贫赤铁矿-75 mm+50 mm,-50 mm+20 mm,-20 mm+5 mm,-5 mm+0 mm各粒级进行预选试验,一粗一扫两次选别,在入选矿石铁品位17%～18%的条件下,预选精矿铁品位提高5.3%～6.8%,回收率大于60%,尾矿铁品位约13%,抛尾产率大于50%.A high-intensity permanent magnetic separator for pre-concentration was designed and developed with the new-type extruded permanent magnet made of Nd-Fe-B.Then,the magnetic induction on the surface of belt conveyor came up to 1.0 T with the maximum magnetic gradient up to 68 mT/mm.Pre-concentration tests were done for the extra-lean hematite from Qidashan Iron Mine,including the size fractions-75 mm＋50 mm,-50 mm＋20 mm,-20 mm＋5 mm,-5 mm＋0 mm—roughing and scavenging each once.After the pre-concentration,the Fe ore grade was improved by 5.3%～6.8% if the original grade was 17%～18%,i.e.,the recovery rate is higher than 60% and tailing grade around 13% with the yield of tailing higher than 50%.

关 键 词：永磁强磁分选设备 预选 ND-FE-B 挤压式磁系 极贫赤铁矿 

分 类 号：TD921[矿业工程—选矿]