CAJ | 학술논문

采用还原氨浸法对高锰氢氧化镍钴原料中的镍钴进行了选择性浸出研究. 采用NH3 ·H2 O-NH4 HCO3 浸出体系,引入水合肼作还原剂,可有效实现镍钴的选择性浸出,原料中的锰不被浸出而富集成为高锰渣. 在ρ( CO2 ) T=35~40 g/L,ρ( NH3 ) T=110~120 g/L,还原剂85% N2 H4 ·H2 O溶液用量为原料中钴元素摩尔含量的2倍,液固比为15 mL/g,室温下浸出3 h,保温陈化2 h的条件下,镍钴浸出率分别达到98.75%和92.71%,约99%的锰进入浸出渣中.
채용환원안침법대고맹경양화얼고원료중적얼고진행료선택성침출연구. 채용NH3 ·H2 O-NH4 HCO3 침출체계,인입수합정작환원제,가유효실현얼고적선택성침출,원료중적맹불피침출이부집성위고맹사. 재ρ( CO2 ) T=35~40 g/L,ρ( NH3 ) T=110~120 g/L,환원제85% N2 H4 ·H2 O용액용량위원료중고원소마이함량적2배,액고비위15 mL/g,실온하침출3 h,보온진화2 h적조건하,얼고침출솔분별체도98.75%화92.71%,약99%적맹진입침출사중.
Nickel and cobalt were selectively leached by reduction-ammonia leaching process from the raw material of high-manganese nickel-cobalt hydroxide. In the system of NH3 ·H2 O-NH4 HCO3 , hydrazine hydrate was used as reductant, which made nickel and cobalt effectively and selectively leached but made manganese enriched in the leaching slag. Under the optimum conditions as follows:ρ( CO2 ) T=35~40 g/L,ρ( NH3 ) T=110~120 g/L,liquid-solid ratio of 15 mL/g, 85% N2 H4 ·H2 O dosage being two times of cobalt molar content in the raw material, leaching time of 3 h and ageing time of 2 h, the leaching ratio of Ni and Co are 98.75% and 92.71% respectively, with 99% of Mn left in the slag.