研究了离析焙烧-磁选法富集磁铁矿尾渣中钴的工艺条件。正交试验结果表明,炭粉加入量对精矿产品钴含量的影响最大,其次是焙烧温度,最后是氯化钠加入量。炭粉加入量、焙烧温度的提高均有助于钴的富集,在焙烧温度1 200℃、炭粉加入量20%、氯化钠加入量4%、焙烧时间2h的条件下,精矿钴品位可达到0.044 5%,钴回收率为75.35%。 The conditions of cobalt enrichment in magnetite tailing by segregation roasting and magnetic separation were studied. Orthogonal test results show that the amount of carbon powder concentrate on the cobalt content of the product most affected, followed by the calcination temperature, and finally the amount of sodium chloride. At the calcination temperature of 1 200 ℃, the amount of carbon powder added 20%, the amount of sodium chloride added 4% and the calcination time 2h, the contents of the cobalt powder and the calcination temperature are all increased. Grade can reach 0.044 5%, cobalt recovery rate of 75.35%.