从某钼尾矿中回收铁的选矿试验及工业实践  

Beneficiation Experiment and Industrial Practice of Recovering Iron from Molybdenum Tailings

作　　者：张子瑞 辛百军 ZHANG Zirui;XIN Baijun(Luoyang Luanchuan Molybdenum Group Co.,Ltd,Luoyang,Henan 471542,China)

机构地区：[1]洛阳栾川钼业集团股份有限公司,河南洛阳市471542

出　　处：《矿业研究与开发》2022年第7期51-55,共5页Mining Research and Development

摘　　要：洛阳某钼浮选尾矿中含有8.15%的磁性铁、12.71%的全铁。为了合理回收该钼尾矿中的铁资源,针对矿石的特性,进行了粗选抛尾、细磨再选、磁悬浮精选等工艺试验。结果表明:采用“粗选抛废—塔磨再选—磁悬浮精选”流程,即钼尾矿先在400 mT磁感应强度下进行预富集,再将所得磁性产品细磨至-0.045 mm 87%,并分别在260 mT、180 mT磁感应强度下进行湿式弱磁粗选、精选,然后将所得精矿在上升水量14 L/min的条件下进行磁悬浮精选提纯,最终获得磁性铁品位63.727%的铁精粉,磁性铁回收率达到96.15%。A Molybdenum flotation tailings in Luoyang contains 8.15%of the magnetic iron and 12.71%of total iron.In order to reasonably recover the iron resources in the molybdenum tailings,according to the characteristics of the ore,the process tests of roughing and tailings discarding,fine grinding and reconcentration,as well as magnetic suspension cleaning were carried out.The results show that,the process of roughing and tailings discarding,tower grinding and reconcentration,as well as magnetic suspension cleaning is adopted,that is,the molybdenum tailings are pre-enriched under the magnetic induction strength of 400 mT,and then the obtained magnetic products are finely ground to the fineness of-0.045 mm 87%for wet weak magnetic roughing and cleaning under the magnetic induction strength of 260 mT and 180 mT respectively.Then,the obtained concentrate is refined by magnetic suspension cleaning under the condition of rising water volume of 14 L/min.Finally,the iron concentrate with magnetic iron grade of 63.727%and recovery of 96.15%can be obtained.

关 键 词：钼尾矿 阶段磨选 超贫磁铁矿 塔磨机 

分 类 号：TD924.1[矿业工程—选矿]