近年来,随着高品位硫化镍矿的枯竭及国内不锈钢产业的快速发展,低品位红土镍矿已经成为生产镍铁产品的主要原料。为了解决红土镍矿的合理利用问题,以红土镍矿为原料,煤粉为还原剂,采用直接还原法将矿石中的镍还原成了金属镍,经磁选分离使镍得到富集。考察了还原温度,还原时间,原料粒度,配煤量对镍回收率的影响。通过试验得出的最佳工艺条件为:原料粒度-0.074mm、配煤量4%、还原剂粒度0.177～0.25mm、还原温度1200℃、还原时间90min;得到的焙烧产物细磨至-0.048mm,并在0.4T的磁场强度下扫选。在0.1T精选后,镍的品位为6.4%,镍的回收率为90%。 In recent years, with the depletion of high-grade nickel sulfide ore and the rapid development of the domestic stainless steel industry, low-grade lateritic nickel ore has become the main raw material for producing ferronickel products. In order to solve the problem of the reasonable utilization of lateritic nickel ore, laterite nickel ore was used as raw material and pulverized coal was used as reducing agent. Nickel in ore was reduced to nickel by direct reduction method. Nickel was enriched by magnetic separation. The effects of reduction temperature, reduction time, particle size and coal blending on nickel recovery were investigated. The optimum technological conditions obtained through the experiment are as follows: raw material particle size -0.074mm, coal blending 4%, reducing agent particle size 0.177 ~ 0.25mm, reduction temperature 1200 ℃ and reduction time 90min; the obtained roasted product is finely ground to -0.048mm , And in the 0.4T magnetic field intensity sweep. After 0.1T selection, the grade of nickel is 6.4% and the nickel recovery is 90%.