以改性腐殖土型红土镍矿中和褐铁型红土镍矿高压浸出液  

Neutralizing high pressure leaching solution of limonite laterite nickel ore with modified saprolite laterite nickel ore

作　　者：田庆华 王青骜[1] 董波 郭学益 曾奎彰 许志鹏[1,2,3,4] TIAN Qing-hua;WANG Qing-ao;DONG Bo;GUO Xue-yi;ZENG Kui-zhang;XU Zhi-peng(School of Metallurgy and Environment,Central South University,Changsha 410083,China;National Local Joint Engineering Research Center for Recycling of Nonferrous Metal Resources,Central South University,Changsha 410083,China;Key Laboratory of Nonferrous Metal Resources Recycling of Hunan Province,Central South University,Changsha 410083,China;China Nonferrous Metals Industry Clean Metallurgical Engineering Research Center,Central South University,Changsha 410083,China)

机构地区：[1]中南大学冶金与环境学院,长沙410083 [2]中南大学有色金属资源循环利用国家地方联合工程研究中心,长沙410083 [3]中南大学有色金属资源循环利用湖南省重点实验室,长沙410083 [4]中南大学中国有色金属工业清洁冶金工程研究中心,长沙410083

出　　处：《中国有色金属学报》2023年第12期4254-4264,共11页The Chinese Journal of Nonferrous Metals

基　　金：国家重点研发计划资助项目(2019YFC1907402);国家自然科学基金资助项目(51922108)。

摘　　要：以改性腐殖土型红土镍矿作中和剂,在100 mL高压浸出溶液中添加25 g改性腐殖土型红土镍矿、中和反应时间60 min、中和反应温度40℃的条件下对褐铁型红土镍矿高压浸出液进行中和处理,高压浸出液中杂质铁、铝脱除率分别达到98.8%、96.8%,实现了铁、铝等杂质的高效脱除。采用高压酸浸工艺处理中和反应产物中和渣,在浸出温度250℃、浸出时间1 h、硫酸浓度1.2 mol/L、液固比8∶1(mL∶g)的条件下进行高压浸出,中和渣中镍、钴浸出率均达到98%。改性腐殖土型红土镍矿中和高压浸出液-中和渣高压酸浸工艺全流程的镍、钴回收率分别达99.5%、96.8%,实现了物料中镍、钴的高效回收,以及中和反应过程的“零排放”。所开发工艺物料利用率高、环境效益显著、普适性强,符合当前镍、钴金属湿法生产的工艺需求,应用前景广阔。The high pressure leaching solution of limonite laterite nickel ore was neutralized with modified saprolite as neutralizer under the conditions of adding modified saprolite 25 g into 100 mL high-pressure leaching solution of limonite laterite nickel ore,neutralization time 60 min and neutralization temperature 40 ℃.The removal rates of iron and aluminum impurities in the high pressure leaching solution reach 98.8% and 96.8%,which realized the efficient removal of iron,aluminum and other impurities.The neutralization reaction product neutralization slag is treated by high pressure acid leaching process.Under the conditions of leaching temperature 250 ℃,leaching time 1 h,sulfuric acid concentration 1.2 mol/L and liquid-solid ratio 8∶1(mL∶g),the leaching rate of nickel and cobalt in neutralization slag reached 98%.The recovery rates of nickel and cobalt in the whole process of neutralization high pressure leaching solution-neutralization slag high pressure acid leaching process of modified saprolite reach 99.5% and 96.8%,which realize that the efficient recovery of nickel and cobalt in the material and the 'zero emission' of neutralization process.The developed process has high material utilization rate,significant environmental benefits and strong universality,which meets the current process requirements of nickel and cobalt metal wet production and has broad application prospects.

关 键 词：改性腐殖土型红土镍矿 中和反应 高压酸浸 镍钴提取 

分 类 号：TF8[冶金工程—有色金属冶金]