多金属结核氨浸液中镍钴铜的萃取分离  

Solvent Extraction Separation of Ni, Co and Cu from Ammonia Leaching Solution of Ocean Polymetallic Nodules

作　　者：汪胜东[1] 尹才硚[1] 蒋开喜[1] 蒋训雄[1] 

机构地区：[1]北京矿冶研究总院,北京100044

出　　处：《有色金属（冶炼部分）》2002年第6期7-9,共3页Nonferrous Metals（Extractive Metallurgy)

摘　　要：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。LIX84 is used to separate Ni, Co and Cu from the cuprous ammonia leach solution of ocean polymetallic nodules. Cu and Ni are co-extracted via 5 stages of count-current extraction, while cobalt remains in the raffinate. The organic phase loaded with Ni and Cu is scrubbed to remove the entrained ammonia. The spent nickel electrolyte is used to strip selectively nickel via 7 stages of stripping, so Ni and Cu can separated primarily. The organic phase is further stripped to produce a pure copper sulphate solution. The little copper containing in the nickel stripper liquor, which is removed by LIX84 again for a complete Ni-Cu separation. The separation of Ni, Co and Cu from the ammonia solution has been achieved with a single solvent reagent. Thus the results indicate that a good separation with a high metal recovery can be obtained via this process. 99.0% Ni, 99.7% Co, and 99.9% Cu can be recovered.

关 键 词：镍 钴 铜 大洋多金属结核 亚铜离子氨浸扩试液 萃取分离 

分 类 号：TF804.2[冶金工程—有色金属冶金]