以镍、钴的提取为目的,研究褐铁矿型镍红土矿高压酸浸过程中各金属元素的浸出行为,探讨硫酸加入量、浸出温度、浸出时间及液固比对各金属元素浸出率的影响。实验结果表明,在优化条件下Ni、Co、Mn和Mg的浸出率分别达到97%、96%、93%和95%以上,则Fe的浸出率小于1%。对高压浸出渣的分析表明,渣中的铁和硫主要分别以赤铁矿和明矾石的形式存在。高压浸出过程提供了一种从镍红土矿中提取镍和钴的简单有效的方法,同时产生具有利用价值的铁渣。 In order to extract nickel and cobalt, the leaching behavior of each metal element in high-pressure acid leaching process of limonite nickel laterite was studied. The effects of sulfuric acid addition, leaching temperature, leaching time and liquid-solid ratio on the leaching rate of each metal element influences. The experimental results show that under the optimal conditions, the leaching rates of Ni, Co, Mn and Mg reach 97%, 96%, 93% and 95% respectively, and the leaching rate of Fe is less than 1%. Analysis of high pressure leaching residue showed that the iron and sulfur in the slag are mainly in the form of hematite and alunite, respectively. The high pressure leaching process provides a simple and efficient method of extracting nickel and cobalt from nickel laterite ore while producing ferrous slag with value.