镍钴锰三元前驱体废料与草酸钴废料的联合浸出

Integrated Leaching of Waste of Ni-Co-Mn Ternary Precursor and Cobalt Oxalate

采用镍钴锰三元前驱体废料和草酸钴废料联合氧化还原浸出,研究了三元前驱体废料和草酸钴废料的质量配比、初始酸度、反应温度、反应时间等对镍、钴和锰浸出率的影响。结果表明,最佳反应条件为:三元前驱体废料和草酸钴废料的质量比53.5、初始酸度4mol/L、反应温度50℃、液固比41、反应时间120min,钴、镍和锰的浸出率分别达到96.76%、99.75%和99.80%,浸出液直接用于共沉淀法制备三元前驱体。实现了两种废料同时浸出和循环回收利用的目的。

Ni-Co-Mn ternary precursor （NixCoyMnc1-x-y） （OH）2） waste and cobalt oxalate （CoC2O4） waste were simultaneously leached. Effects of mass ratio of （NixCoyMn（1-x-y） （OH）2） and CoC2O4 waste, initial acidity, reaction temperature, L/S, and reaction time on leaching rate of Ni, Co, and Mn were investigated. The results show that leaching rate of Ni, Co, and Mn is 99.75%, 96.76%, and 99.80%, respectively under the optimum conditions including mass ratio of （Nix Coy Mn（1-x-y）） （OH）2） and CoC2O4 waste of 5 ： 3.5, initial acidity of 4 mol/L, reaction temperature of 50 ℃, L/S of 4 ： 1, and reaction time of 120 rain. Lixivium can be used to prepare NixCoyMn（1-x-y） （OH）. directly. The objective of integrated leaching and comprehensive recycling of two wastes is realized.