Oxidative acid leaching behavior of Fe–Ni–Co alloy powder derived from a laterite ore  

作　　者：Meishi Hu Jing Chen Mingjun Rao Siyu Chen Jun Luo Guanghui Li Tao Jiang 

机构地区：[1]School of Minerals Processing&Bioengineering,Central South University,Changsha 410083,China [2]College of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China

出　　处：《International Journal of Minerals,Metallurgy and Materials》2025年第4期825-834,共10页矿物冶金与材料学报(英文版)

基　　金：financially supported by the National Natural Science Foundation of China (Nos.52174288 and 51804346)。

摘　　要：The demand for Ni and Co has surged due to the rapid expansion of the electric vehicle industry. Thus, developing efficient and eco-friendly metallurgical routes for extracting these metals has become imperative. This study introduces a sustainable and effective method for extracting Ni and Co from Ni–Co–Fe alloy powder obtained from limonitic laterite ores through selective reduction and magnetic separation. The leaching efficiency for Ni, Co, and Fe was 89.4%, 94.8%, and 96.5%, respectively, under the following conditions for leaching: 3 mol/L H_(2)SO_(4), 85℃, 10 m L/g liquid–solid ratio, and 90 min leaching time. The incorporation of H_(2)O_(2) enhanced the leaching efficiency for Ni, Co, and Fe. The redox potential of the solution plays a crucial role in acid dissolution, and H_(2)O_(2) enhances Ni and Co dissolution. Phosphate precipitation facilitated the removal of Fe from the leachate, affording a 96.1% Fe removal ratio and 2.29% Ni loss.

关 键 词：Ni–Co–Fe alloy powder atmospheric acid leaching oxidation–reduction potential of solution laterite ore 

分 类 号：TG1[金属学及工艺—金属学]