锈蚀法提取预还原红土镍矿中镍和钴  

Extraction of nickel and cobalt from reductive laterite by corrosion process

作　　者：赵玉先[1] 胡启阳[1] 李新海[1] 王志兴[1] 郭华军[1] 

机构地区：[1]中南大学冶金科学与工程学院,长沙410083

出　　处：《中国有色金属学报》2012年第11期3208-3213,共6页The Chinese Journal of Nonferrous Metals

基　　金：国家重点基础研究发展计划资助项目(2007CB613607)

摘　　要：以国外某红土镍矿经氯化离析法预处理后的还原矿为原料,对锈蚀法处理预还原红土镍矿工艺进行研究,系统考察酸料质量比、空气流量、锈蚀温度、锈蚀时间、搅拌速率以及固液比(固体质量与液体体积比,mg/mL)对铁、镍和钴浸出率的影响。结果表明:在酸料质量比0.10,空气流量1 L/min、锈蚀温度80℃、锈蚀时间8 h、搅拌速率300 r/min和固液比1:10的条件下,镍和钴的浸出率分别达到90.9%和80.2%,铁的浸出率仅为9.9%,实现了铁与镍和钴的分离。The treatment of reductive laterite by corrosion process was studied using the laterite processed by chloridizing segregation process as starting materials.The effects of mass ratio of acid to ore,air flux,leaching temperature,leaching time,stirring speed,and solid-to-liquid ratio（ratio of solid mass to liguid volume,g/mL） on the leaching rates of Fe,Ni and Co were systematically investigated.The results show that under the optimum conditions of mass ratio of acid to ore 0.1：1,air flux 1 L/min,leaching temperature 80 ℃ and time 8 h,stirring speed 300 r/min,solid-to-liquid ratio 1：10,the leaching rates of Ni and Co are respectively 90.9% and 80.2%,and the leaching rate of Fe is only 9.9%.Consequently,Ni and Co can be effectively separated from Fe.

关 键 词：红土镍矿 镍 钴 锈蚀法 浸出率 

分 类 号：TF803.21[冶金工程—有色金属冶金]