鞍山地区微细粒贫磁铁矿石磁选工艺研究  

Research on Magnetic Separation Process of Fine-grained Lean Magnetite Ore in Anshan Region

作　　者：李万兴 吴俊杰 宁辰禹 徐冬林 郑纪民 郭小飞 LI Wanxing;WU Junjie;NING Chenyu;XU Donglin;ZHENG Jimin;GUO Xiaofei(School of Mining Engineering,University of Science and Technology Liaoning,Anshan 114051,China;Anshan Iron and Steel Group Mining Design and Research Institute,Anshan 114002,China;Anqian Mining Co.,Ltd.,Anshan Iron and Steel Group,Anshan 114043,China;Weihai Haiwang Cyclone Co.,Ltd,Weihai 264204,China)

机构地区：[1]辽宁科技大学矿业工程学院,辽宁鞍山114051 [2]鞍钢集团矿业设计研究院有限公司,辽宁鞍山114002 [3]鞍钢集团鞍千矿业责任有限公司,辽宁鞍山114043 [4]威海市海王旋流器有限公司,山东威海264204

出　　处：《金属矿山》2024年第3期94-98,共5页Metal Mine

基　　金：辽宁省“兴辽英才计划”项目(编号:XLYC20020208);辽宁省教育厅重点攻关项目(编号:JYTZD2023097)。

摘　　要：鞍山地区许东沟和哑巴岭采区的铁矿石铁品位为29.50%,铁矿物主要为磁铁矿,主要脉石为石英。为高效开发利用该矿石,在采用X荧光分析、化学成分分析、铁物相检测和扫描电子显微镜分析矿石性质基础上,进行了湿式粗粒中磁预选—阶段磨矿、阶段弱磁选—淘洗机精选条件试验和扩大连选试验。结果表明:①-2.5 mm高压辊磨产品经过筒式磁选机中磁预选,粗精矿铁品位为40.20%、铁回收率为89.76%;②预选粗精矿经过两阶段磨矿(一、二段磨矿细度分别为-0.074 mm占75%和-0.045 mm占90%)、三阶段弱磁选和一段淘洗机精选,最终获得产率35.73%、铁品位67.08%、铁回收率81.24%的铁精矿,尾矿铁品位为8.61%,研究结果可作为该矿石开发利用依据。The iron grade of iron ore in Xudonggou and Yabaleng mining areas in Anshan region is 29.50%.The main i-ron minerals is magnetite,and the main gangue mineral is quartz.In order to develop and utilize the ore efficiently,based on the ore properties analysis obtained by X-ray fluorescence analysis,chemical composition analysis,iron phase detection and scan-ning electron microscope,the selection conditions of wet coarse medium magnetic preconcentration,stage grinding stage weak magnetic separation,elutriation machine cleaning and extended continuous separation test were carried out.The results showed that:①the iron grade and recovery rate of magnetic pre-selected coarse concentrate in the drum magnetic separator of-2.5 mm high pressure roller grinding products are 40.20%and 89.76%;②After two stages of grinding(the fineness of the first and second stages of grinding is-0.074 mm accounting for 75%and-0.045 mm accounting for 90%,respectively),three sta-ges of low intensity magnetic separation,and one stage of washing machine selection,the iron concentrate with final yield of 35.73%,iron grade of 67.08%,iron recovery of 81.24%was obtained,and iron grade of tailings is only 8.61%.The research results can be used as the basis for development and utilization of the ore.

关 键 词：贫磁铁矿 微细粒 粗粒预选 阶段磨矿 阶段磁选 

分 类 号：TD951[矿业工程—选矿] TD924