东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2010, Vol. 31 ›› Issue (8): 1187-1191.DOI: -

• 论著 • 上一篇    下一篇

永磁强磁预选设备的研制与应用

袁致涛;高太;郭小飞;韩跃新;   

  1. 东北大学资源与土木工程学院;齐大山铁矿;
  • 收稿日期:2013-06-20 修回日期:2013-06-20 出版日期:2010-08-15 发布日期:2013-06-20
  • 通讯作者: -
  • 作者简介:-
  • 基金资助:
    国家高技术研究发展计划项目(2007AA06Z127);;

Development and application of high-intensity permanent magnetic separator for pre-concentration

Yuan, Zhi-Tao (1); Gao, Tai (1); Guo, Xiao-Fei (1); Han, Yue-Xin (1)   

  1. (1) School of Resources and Civil Engineering, Northeastern University, Shenyang 110004, China; (2) Qidashan Iron Mine, Anshan 114043, China
  • Received:2013-06-20 Revised:2013-06-20 Online:2010-08-15 Published:2013-06-20
  • Contact: Guo, X.-F.
  • About author:-
  • Supported by:
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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%.

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

Abstract: 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%.

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