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采用LIX84从氨性溶液中萃取分离镍、钴、铜。首先采用 5级逆流共萃铜、镍 ,钴留在萃余液中 ,含铜、镍的负载有机相经二级洗涤氨 ;用镍电解废液进行 7级逆流选择性反萃镍 ,实现镍与铜的初步分离 ;然后从含铜有机相中反萃铜得到纯净的硫酸铜溶液 ,选择性反萃镍得到含有少量铜的粗镍液 ,该液仍采用LIX84萃取脱铜 ,并回收铜 ,从而将铜、镍彻底分离 ,实现了用一种萃取剂分离氨浸液中的镍、钴、铜。联动连续运转试验结果表明 ,采用本研究确定的萃取工艺流程和萃取设备处理氨浸液 ,萃取分离效果好 ,试验结果稳定、可靠。金属回收率高 ,萃取回收率分别为 ( %) :Ni 99 0 ,Co 99 7,Cu 99 9。
Extraction, separation and purification of nickel, cobalt, copper from ammoniacal solution using LIX84. First of all, the countercurrent co-extraction of copper 5, nickel, cobalt remain in the raffinate, containing copper, nickel loaded organic phase secondary washing ammonia; nickel electrolytic waste liquid countercurrent selective nickel 7, nickel And copper preliminary separation; and then from the copper-containing organic phase stripping copper pure copper sulfate solution, the selective stripping of nickel to get a small amount of copper with a crude nickel solution, the liquid is still using LIX84 extraction decalcification and recovery of copper, Thus, copper and nickel are completely separated, thereby realizing the separation of nickel, cobalt and copper in the ammonia immersion liquid by using an extractant. The results of the linkage continuous operation test showed that the extraction process and the extraction equipment determined by this study were effective for the extraction and separation of ammonia leachate, and the test results were stable and reliable. High metal recovery, extraction recovery were (%): Ni 99 0, Co 99 7, Cu 99 9.