残积型红土镍矿金属化还原焙烧—磁选高效回收镍铁  

Recovery of Ferronickel from Eluvial Nickel Laterite Ore by Metallic Reduction Roasting and Magnetic Separation

作　　者：揭晓武[1] 王成彦[1] 尹飞[1] 陈永强[1] 杨永强[1] 

机构地区：[1]北京矿冶研究总院,北京100160

出　　处：《有色金属（冶炼部分）》2015年第5期10-13,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：采用添加促进剂金属化还原焙烧—磁选工艺从残积型红土镍矿中富集镍、铁,考察焙烧温度、促进剂用量、恒温时间、配煤量对金属化焙烧过程镍、铁富集的影响。结果表明,添加5%的促进剂后,精矿镍、铁的回收率分别由41.9%、39.22%提高到93.31%、75.65%。优化的焙烧工艺条件为:原矿添加5%的促进剂、7%的煤混匀造球,1 200℃恒温焙烧150min,焙砂中94.02%的镍及77.39%的铁以镍铁合金形式产出;焙砂磨矿—磁选分离,得含Ni 7.32%、Fe 73.85%的精矿,且精矿镍回收率>93%,铁回收率>75%。Nickel and iron were enriched in ferronickel from eluvial nickel laterite ore by metallic reduction roasting and magnetic separation. The effects of roasting temperature, dosage of promoter, roasting time and carbon dosage on enrichment of ferronickel were investigated. The results indicate that recoveries of Ni, Ferise from 41.9%, 39.22% to 93.31%, 75.65%, respectively after adding 5% promoter. 94.02% nickel and 77.39 % iron in calcining exist in the form of ferronickel under the optimum conditions including 5% promote, 7% coal, pelletizing, and reduction roasting 180 min at 1 200℃. Calcining is ground and magnetically separated to produce concentrate containing 7.32% Ni and 73.85% Fe with recovery of Ni and Fe of 93 % and 75 % above respectively.

关 键 词：红土镍矿 金属化还原焙烧 促进剂 磁选 镍铁 

分 类 号：TF815[冶金工程—有色金属冶金]