钴冰镍常压浸出工艺研究

Study on Atmospheric Pressure Leaching Process of Cobalt-nickel Matte

以镍转炉渣还原硫化熔炼得到的钴冰镍为原料,在常压下于硫酸体系中进行浸出,考察了硫酸浓度、液固比、浸出时间及浸出温度对钴冰镍中有价成分浸出率的影响。结果表明,液固比和硫酸浓度对钴、镍、铁的浸出率影响较大。当硫酸浓度为1.6mol/L、液固比5、浸出时间2.5h、浸出温度85℃时,铁浸出率达到69%,镍、钴浸出率分别控制在1%和5%以内,取得了很好的选择性浸出效果。

The cobalt-nickel matte, a reduction product from nickel converter slag by vulcanization smel-ting, was atmospherically pressure leached at the sulfuric acid system. The effects of sulfuric acid concen- tration, ratio of liquid to solid （L/S）, leaching time and temperature on leaching rate of valuable metals were investigated. The results show that L/S and sulfuric acid concentration have great influence on the leaching rate of cobalt, nickel and ferrum. The ferrum leaching rate reaches to 69%, nickel and cobalt leaching rate could be controlled below 1% and 5 % respectively under the conditions including sulfuric acid concentration of 1.6 mol/L, L/S of 5, leaching time of 2.5 h, and leaching temperature of 85 ℃. A good selectivity leaching effect was obtained.