Recovery of Rare Earth and Cobalt from Co-based Magnetic Scraps

摘要：

The reuse of RE and cobalt in Co-based magnetic scraps was studied. Making sure feat lixiviated condition is that: 200 mesh,sulfuric acid dosage of 1.4 times theoretic dosage,temperature 90℃,leaching time lh. The result indicated that lixiviate rate of cobalt and rare earth attained 97.8％,99.6％ respectively. The optimum technology conditions was:Na2S2O8 dosage of 8 times theoretic dosage,oxidation temperature 80℃,oxidation time 2 hour,pH=4.5.Rare earth was precipitated by saturated (NH4)2C2O4 solution,after roasting of rare earth oxalate,received rare earth oxide. The samarium and gadolinium sum recovery was 96％,92％ respectively. Cobalt-iron residue was soaked by hydrochloric acid,the Fe(OH)3 was preferential solution,pH was adjusted to 1.4 by hydrochloric acid,Co(OH)3does not dissolved,Cobalt and iron were separated,after roasting of Co(OH)3,received cobalt oxide. The total recovery of cobalt was found to be 97％ and rare earths was 96％.

关键词： cobalt-based magnetic scrap cobalt rare earth

作者: XU Tao ZHANG Xiao-dong

作者单位: Baotou Research Institute of Rare Earth,Baotou 014030,China National Engineering Research Center of Inner Mongolia Baotou Steel Rare Earth Hi-Tech CO.,LTD.,Baotou 014030,China

会议类型: 国际会议

会议名称: The 2010 International Symposium on Project Management(2010年首届工程管理国际研讨会)

会议地点: 江苏沭阳

会议语种:英文

页码: 30-35

在线出版日期: 2010-07-01（万方平台首次上网日期，不代表论文的发表时间）