转炉渣强化还原选矿提高镍、钴回收率的研究与应用  

Research and Application of Enhanced Reduction Beneficiation of Converter Slag to Improve the Recovery of Nickel and Cobalt

作　　者：王亨 陈志新 唐伟栋 石继宗 刘立彦 杨洪 Wang Heng;Chen Zhi-xin;Tang Wei-dong;Shi Ji-zong;Liu Li-yan;Yang Hong

机构地区：[1]金川集团镍钴有限公司镍冶炼厂 [2]镍钴共伴生资源开发与综合利用全国重点实验室 [3]金川镍钴研究设计院

出　　处：《金川科技》2024年第4期11-20,共10页Jinchuan Science and Technology

摘　　要：本文研究了将转炉渣进一步硫化还原得到强化还原渣,并检测了转炉渣和强化还原渣的矿物成分、矿物构造、镍铜化学物相、主要有价金属及其金属矿物分布特征等特性,并在此基础上开展了选矿试验,得到含镍15%以上、含铜8%以上的铜镍混合精矿,镍回收率达到45%以上、铜回收率85%以上,尾矿含镍1.5%以下、含铜0.1%左右;还分析了磨矿产品的主要金属镍铜矿物单体解离及粒度分布状态,并查明尾矿含镍偏高主要原因是尾矿中镍大部分以氧化相及硅酸盐相赋存,部分以细小的连生体或单体包裹在脉石矿物中,此部分有价金属很难通过沉降分离的方式进行再利用,必须先通过强化硫化还原后再进行沉降分离或炉渣选矿进行回收。In this paper,the converter slag is further sulfide reduction to get strengthened reduction slag,and the mineral com-position,mineral structure,nickel-copper chemical phases,the main valuable metals and their metal minerals distribution charac-teristics of the converter slag and strengthened reduction slag are detected,and based on this,the beneficiation test is carried out,and a mixed copper-nickel concentrate containing more than 15%nickel and more than 8%copper is obtained,and the recovery rate of nickel reaches more than 45%,and the recovery rate of copper reaches more than 85%.The recovery rate of nickel is more than 45%and copper is more than 85%,and the tailings contain less than 1.5%of nickel and less than 0.1%of copper;we also analyzed the dissociation of the main metal nickel-copper minerals and particle size distribution of the mill products,and identified the main reason for the high nickel content in the tailings is that most of the nickel in the tailings to the oxidized phase and silicate phase endowment,part of the fine conidia or monomers encapsulated in the vein minerals,this part of the valuable metal is difficult to be reused through the way of precipitation and separation,it must be strengthened through the sulfide reduction and then precipi-tation and separation or slag recovery by beneficiation.

关 键 词：转炉渣 硫化还原 强化还原渣 选矿 矿物组成 

分 类 号：TQ3[化学工程]