红土镍矿转底炉预还原-电炉熔分制取镍铁合金  

Production of Ni-Fe alloy from nickeliferous laterite ore by prereduction-electric furnace smelting separation

作　　者：范兴祥[1] 董海刚[1] 汪云华[1] 吴跃东[1] 李柏榆[1] 李博捷[1] 赵家春[1] 暂林寒[1] 

机构地区：[1]昆明贵金属研究所稀贵金属综合利用新技术国家重点实验室,云南昆明650106

出　　处：《中南大学学报（自然科学版）》2012年第9期3344-3348,共5页Journal of Central South University:Science and Technology

基　　金：国家科研院所技术开发专项资金资助项目(NCSTE-2007-JKZX-062);云南省科技计划项目(2008AA001)

摘　　要：对某红土镍矿采用转底炉预还原-电炉熔分工艺制取镍铁合金进行研究。实验结果表明:根据矿石性质,选择合适的渣型为SiO2-MgO-CaO-FeO四元渣系,在熔剂石灰配比为25%,还原剂配比为3.5%,预还原温度为1 150℃,预还原时间为30 min,电炉熔分温度为1 450℃,熔分时间为15 min的条件下,经转底炉预还原-电炉熔分后,获得镍质量分数为8.68%、镍回收率97.62%、铁质量分数为86.23%的镍铁合金,该合金可用作不锈钢生产原料。The production of Ni-Fe alloy from nickeliferous laterite ore was studied by rotary hearth furnace prereduction-electric furnace smelting separation.The results show that a SiO2-MgO-CaO-FeO slag style is chosen according to the characteristic of the nickeliferous laterite ore and Ni-Fe alloy with 8.68% Ni（mass fraction）,Ni 97.62% recovery and 86.23% Fe is obtained under the conditions of lime dosage 25%,reductant coke powder dosage 3.5%,prereduction temperature 1 150 ℃,prereduction time 30 min,smelting temperature 1 450 ℃,smelting time 15 min,respectively,which can be used as the raw material of production of stainless steel.

关 键 词：红土镍矿 预还原 电炉熔分 镍铁合金 

分 类 号：TF125.212[冶金工程—粉末冶金]