从废高温镍钴合金中浸出镍和钴的试验研究  

Experimental Study on Leaching of Nickel and Cobalt From Waste High-temperature Ni-Co Alloys

作　　者：侯晓川[1,2] 肖连生[1] 高从堦[1] 张启修[1] 叶新华 郭金良 

机构地区：[1]中南大学冶金科学与工程学院,湖南长沙410083 [2]金川有色金属公司,甘肃金昌737100

出　　处：《湿法冶金》2009年第3期164-169,共6页Hydrometallurgy of China

摘　　要：研究了采用"苏打焙烧—碱浸出铝、钼—氯气浸出钴、镍、铁等—TBP萃取除铁—中和水解除铬—P204萃取除微量杂质—N235萃取分离镍、钴"工艺处理废高温镍钴合金,重点考察了从废镍钴合金中浸出镍和钴,讨论了苏打焙烧温度和碱浓度对铝、钼浸出率的影响,碱浸渣氯气浸出电位、浸出时间、废合金粒度、添加剂的加入等因素对镍、钴浸出率的影响。试验确定了从废高温镍钴合金中浸出镍、钴的工艺优化条件。综合条件下,镍、钴平均浸出率分别为99.30%和97.67%,浸出渣中镍、钴质量分数平均为0.51%和0.44%。The disposal process for waste high-temperature Ni-Co alloys is experimental studied. The flow sheet consists of alkali roast-leaching by NaOH solution-chlorine leaching-removing iron by TBP solvent extraction-removing chromium by hydrolyzing-removing other impurities by P204 solvent extraction-separating nickel from cobalt by N235 solvent extraction. This paper focuses on describing the leaching parts of the process. The effects of soda roasting temperature and alkali concentration on A1 and Mo leaching rate, and influence of chlorine leaching potential, leaching time, residue particle size,additives and other factors on leaching of Ni and Co from alkali leaching residue have been examined mainly. The optimum technical conditions of leaching Ni and Co from the waste high-temperature nickel-cobalt alloy have been determined through pilot studies. Under the optimum conditions, the leaching rates was 99.30% for nickel and 97.67% for cobalt, 0.51% for nickel and 0.44% for cobalt were left in leaching residue. The leaching solution containing nickel and cobalt can be used for producing nickel and cobalt products.

关 键 词：高温合金 焙烧 碱浸出 氯气浸出 镍 钴 

分 类 号：TF81[冶金工程—有色金属冶金]