摘要
实验采用全湿法冶金工艺从锰钴镍渣中回收钴、镍,制备硫酸钴和硫酸镍产品,并研究了不同工艺参数对各项技术指标的影响。通过加热、鼓泡和稀酸洗涤,使94.5%的钴镍富集在占原渣量16%的钴镍泡沫渣中,该渣经过热浓硫酸浸出后,通过黄钠铁矾法除铁,NaF除钙、镁,以及用P204萃取剂深度净化后,净化液中杂质的浓度(g/L)降至:Cu2+0.01、Zn2+0.01、Mn2+0.01、Fe3+0.01,而净化液中Co2+、Ni2+浓度分别达到1.95 g/L和25.5 g/L,钴镍损失量很小。采用P507萃取剂使净化液中钴镍很好地分离,分离系数达到300。淬余相为硫酸镍溶液,负载钴的有机相通过硫酸反淬后形成硫酸钴溶液,通过蒸发浓缩和冷却结晶,分别制得纯度为99.5%以上的水合硫酸镍和水合硫酸钴产品。
Cobalt and nickel were recovered from manganese-cobalt-nickel slag exclusively through hydrometallurgical method to pro-duce cobalt sulfate and nickel sulfate in the experiment. The effects of different process parameters on various technical indicators were studied. 94.5percent of cobalt and nickel elements were enriched into a cobalt-nickel foaming slag which weighed only 16 percent of its original slag by the sequential heating,bubbling and washing treatments. Then the foaming slag was leached through hot concentrated sulfuric acid.The digested solution includes impurity ions such as Cu2＋,Zn2＋,Mn2＋,Ca2＋,Mg2＋and Fe3＋besides of the expected Co2＋and Ni2＋. Fe3＋in the solution was removed by sodium jarosite purifying process,and Ca2＋and Mg2＋were removed by using NaF precipitant,and the residue impurity elements were deeply purified by using P204 extraction agent. The concentrations （g/L） of Co2＋and Ni2＋in purified solution are 1.95 and 25.5,and the impurity elements Cu2＋,Zn2＋,Mn2＋,and Fe3＋are 0.01,0.01,0.01, 0.01,respectively. The loss of cobalt and nickel is small in the process. Cobalt could be well separated from nickel in the solution by using P507 extraction agent and the separated factor is as high as 300. The remaining water solution called residue phase is nickel sul-fate solution. Cobalt sulfate solution was obtained from the organic phase loaded with cobalt in the reverse extraction process using sul-fate acid. After these solutions were concentrated by evaporation and cooling crystallization,the products including 99.5%hydrous cobalt sulfate and hydrous nickel sulfate were both produced.
出处
《企业技术开发》
2014年第2期20-22,共3页
Technological Development of Enterprise
基金
年处理5000吨净化渣回收镍钴金属的研究(桂科攻11217001-3-2)
关键词
锰钴镍渣
回收
硫酸钴
硫酸镍
manganese-cobalt-nickel slag
recycle
cobalt sulfate
nickel sulfate
