镍钴锰三元前驱体废料与草酸钴废料的联合浸出

摘要

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4 mol/L、反应温度50℃、液固比4∶1、反应时间120 min,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 (Nix Coy Mn(1-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 (NixCoyMn(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 min.Lixivium can be used to prepare NixCoyMn(1-x-y) (OH)2 directly.The objective of integrated leaching and comprehensive recycling of two wastes is realized.