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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%。
In this paper, the technology of “soda roasting-alkali leaching of aluminum, molybdenum-chlorine leaching of cobalt, nickel, iron-TBP extraction iron removal-neutralization hydrolysis chromium removal-P204 extraction of trace impurities -N235 extraction and separation of nickel and cobalt” The research focuses on the leaching of nickel and cobalt from waste nickel-cobalt alloy. The effects of roasting temperature and alkali concentration on the leaching rate of aluminum and molybdenum were discussed. The leaching potential of alkali leaching chlorine gas, leaching time, particle size of waste alloy , Additives and other factors on the nickel, cobalt leaching rate. The experiment determined the process optimization conditions for leaching nickel and cobalt from waste high temperature nickel-cobalt alloy. Under the comprehensive conditions, the average leaching rates of nickel and cobalt were 99.30% and 97.67%, respectively. The average nickel and cobalt contents in leaching residue were 0.51% and 0.44% respectively.