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对镍冶炼渣的组分进行了分析,采用煤做还原剂对镍冶炼渣中金属元素进行高温还原,结果表明:主金属元素铁被还原成单质,其他有价金属元素Ni,Cu,Co以合金的形式存在于单质铁中.通过对温度、时间、配碳比和CaO添加量等反应参数的实验研究,得到了最优的反应条件,即温度为1 300℃,时间为60min,配碳比为4,CaO添加量为20%,还原产物中铁的金属化率可达到99.22%.对还原产物进行破碎-磨矿-磁选处理,可得到铁品位89.84%,金属化率96.85%,回收率92.15%,其他金属Cu,Co,Ni回收率≥85%的混合精矿.
The composition of nickel smelting slag was analyzed. Using coal as reductant, the metal elements in nickel smelting slag were reduced at high temperature. The results showed that the main metal element iron was reduced to simple substance and the other valuable metal elements Ni, Cu and Co The form of the alloy exists in the elemental iron.The optimum reaction conditions were obtained through the experimental study on the reaction parameters such as temperature, time, the ratio of carbon to carbon and the amount of CaO added, ie the temperature was 1300 ℃, the time was 60min, The ratio of CaO is 20%, the metallization rate of iron in the reduced product can reach 99.22% .After the crushing-grinding-magnetic separation of the reduced product, the iron grade is 89.84% and the metallization rate is 96.85% Rate of 92.15%, other metal Cu, Co, Ni recovery ≥ 85% of the mixed concentrate.