硅铁配比对氧化镍矿低温金属化还原的影响  

Effect of Si/Fe Ratio on Metalized Reduction of Nickel Oxide Ore at Low Temperature

作　　者：马保中[1,2] 杨玮娇[1,2] 刘伟强[1] 王成彦[3] 王华[1] 

机构地区：[1]昆明理工大学冶金与能源工程学院,昆明650093 [2]北京矿冶研究总院,北京100160 [3]北京科技大学冶金与生态工程学院,北京100083

出　　处：《有色金属（冶炼部分）》2016年第7期1-4,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金面上项目(51274044);国家自然科学基金青年基金项目(51304023);国家自然科学基金云南省联合基金项目(U1302274)

摘　　要：以三氧化二铁、氧化亚镍和硅酸镁为原料,依照云南代表性氧化镍矿原矿中铁、镍和硅质量比进行配矿,研究硅铁比对镍铁金属化以及镍铁合金聚合行为的影响。结果表明,当Fe/Ni=13/1,Si/Fe=1.2/1,煤粉加入理论量2倍,1 280℃反应60 min后,经磁选分离获得的精矿中镍、铁品位分别为4.95%、50.93%,镍、铁回收率分别为99.32%、80.12%。还原产物主要相为MgSiO_3和[Fe,Ni],镍铁合金聚集状态良好,精矿主要相为[Fe,Ni],仅有少量SiO_2残留,分离效果较好。云南代表性氧化镍矿原矿的验证试验取得了相似结果。The effects of Si/Fe ratios on metallization of nickel and iron and aggregating behavior of nickeliron alloy were investigated applying iron trioxide,nickel oxide and magnesium silicate as raw materials,which were blended based on mass ratio of iron,nickel and silicon of typical nickel oxide ore in Yunnan province.The results show that grade of nickel and iron in obtained concentrates after magnetic separation is 4.95％ and 50.93％ respectively,and recovery of nickel and iron is 99.32％ and 80.12％ respectively under the conditions of Fe/Ni=13/1,Si/Fe=1.2/1,twice theoretical value of coal addition,1 280 ℃ and 60 min.Main phases in reduction product are MgSiO3 and [Fe,Ni] with good aggregation state,and [Fe,Ni] is as main phase in concentrate with a little residual SiO2 which indicates a good separation result.Verification tests conducted to treat typical nickel oxide ore in Yunnan province acquires similar results.

关 键 词：氧化镍矿 金属化还原 低温 硅铁比 

分 类 号：TF815[冶金工程—有色金属冶金]