摘要
研究了用硫酸从印尼某高铁低品位红土镍矿中加压酸浸镍、钴、铁,并探讨了浸出渣中铁品位变化及常压、加压下的浸出动力学。结果表明:在酸矿比260 kg/t、温度250℃(对应水蒸气压力4.0 MPa)、液固体积质量比3/1、搅拌速度300 r/min、粒度100目、反应时间1 h条件下,镍、钴、铁浸出率分别为98.1%、98.3%、4.7%,铁品位可达51.3%;加压和常压下,镍、钴浸出过程均符合界面化学反应控制的收缩核模型,加压下反应活化能分别为116、91 kJ/mol,常压下反应活化能分别为41、53 kJ/mol;常压下主要是针铁矿的浸出,高压下主要是铬铁矿、磁铁矿等矿相的浸出。
The change of iron grade in the leaching residue and the leaching kinetics under normal pressure and pressure were examined.The pressure leaching of nickel and cobalt from a high iron and low grade laterite nickel ore in Indonesia with sulfuric acid was studied.The results show that under the conditions of acid/ore ratio of 260 kg/t,leaching temperature of 250℃(corresponding to water vapor pressure of 4.0 MPa),liquid volume/solid mass ratio of 3/1,stirring speed of 300 r/min,particle size of 100 mesh and reaction time of 1 h,the leaching rates of nickel,cobalt and iron are 98.1%,98.3%and 4.7%,respectively,and the iron grade can reach 51.3%.The leaching processes of nickel and cobalt under pressure and atmospheric pressure are in line with the shrinkage kernel model of interfacial chemical reaction control,and the activation energies of the reactions are 116 kJ/mol and 91 kJ/mol under pressure,respectively,and the activation energies of the reaction under atmospheric pressure are 41 kJ/mol and 53 kJ/mol,respectively.The leaching is mainly goethite under normal pressure,and chromite,magnetite and other mineral phases under high pressure.
作者
郭佳文
陈进中
冯吉福
GUO Jiawen;CHEN Jinzhong;FENG Jifu(College of Materials Science and Engineering,Guilin University of Technology,Guilin 541004,China;Key Laboratory of New Technology for Non Ferrous Metals and Materials Processing,Guilin University of Technology,Guilin 541004,China;Collaborative Innovation Center for Exploration of Nonferrous Metal Deposits and Efficient Utilization of Resources,Guilin University of Technology,Guilin 541004,China;China Nonferrous Guilin Institute of Mineral Geology Co.,Ltd.,Guilin 541004,China)
出处
《湿法冶金》
CAS
北大核心
2024年第1期20-28,共9页
Hydrometallurgy of China
基金
桂林理工大学科研启动基金资助项目(GLUTQ2017099)
广西重点研发计划项目(桂科AB21076013)
广西科技基地和人才专项项目(桂科AD22035105)
国家环境保护矿冶资源利用与污染控制重点实验室开放基金课题资助项目(HB202105)。
关键词
红土镍矿
高铁
低品位
镍
钴
酸浸
动力学
laterite nickel ore
high iron content
low grade
nickel
cobalt
acid leaching
dynamics
