大洋多金属结核与富钴结壳合并还原氨浸工艺研究  

Study of Merger Metallurgy Process of Ocean Polymetallic Nodules and Cobalt-rich Crusts

作　　者：王仍坚[1] 蒋开喜[1] 蒋训雄[1] 汪胜东[1] 范艳青[1] 张登高[1] 

机构地区：[1]北京矿冶研究总院,北京100160

出　　处：《有色金属（冶炼部分）》2014年第9期19-22,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：中国大洋协会专项基金资助项目(DY125-14-T-01)

摘　　要：以大洋多金属结核和富钴结壳按一定比例混合后的矿物为原料,在氨性体系中,以亚铜离子为催化剂,一氧化碳为还原剂,考察配矿比、硫酸铵浓度、氨浓度、亚铜离子浓度、温度等对有价金属浸出率的影响。结果表明,最佳浸出条件为:富钴结壳占比25%、硫酸铵浓度25g/L、体系总氨120g/L、亚铜离子浓度10g/L、温度50℃、一氧化碳流量20mL/min。在上述最佳条件下Ni、Co、Cu、Mn浸出率分别为97.15%、93.68%、92.64%、20.90%。实现了多金属结核和富钴结壳的合并冶炼,解决了单一富钴结壳氨浸法处理时钴浸出率低的难题。Mineral mixed by ocean polymetallic nodules and cobalt-rich crusts was used as raw material.Effects of mixture ratio of ocean polymetallic nodules to cobalt-rich crusts,concentration of ammonium sulfate,ammonia concentration,cuprous ion concentration and temperature on leaching rate of valuable metals were investigated in low temperature ammonia solution system with cuprous ions as catalyst and carbon monoxide as reductant.The results show that leaching rates of nickel,cobalt,copper and manganese are 97.15％,93.68％,92.64％ and 20.90％ respectively under the optimum conditions including ratio of cobalt-rich crusts of 25％,concentration of ammonium sulfate of 25 g/L,ammonia concentration of 120 g/L,cuprous ion concentration of 10 g/L,temperature of 50 ℃,and flow rate of carbon monoxide of 20 mL/min.Combined metallurgy process of ocean polymetallic nodules and cobaltrich crusts is achieved,and the problem of low cobalt leaching rate in leaching of single cobalt-rich crusts by ammonia is addressed.

关 键 词：大洋多金属结核 富钴结壳 还原氨浸 硫酸铵 

分 类 号：TF803.2[冶金工程—有色金属冶金]