摘要
为了研究黄铁矿经高温焙烧制取硫酸后产生的铜品位为0.87%硫酸渣的铜浸出动力学规律,采用X射线衍射分析等方法分析了矿石的性质,研究了矿石粒度、初始酸浓度、液固比、搅拌速率、浸出温度和浸出时间等因素对硫酸渣矿样中铜浸出的影响,采用未反应收缩核模型对硫酸渣浸出过程进行动力学分析。结果表明,各因素对硫酸渣铜浸出的浸出率有较大影响;从浸出过程控制模型、浸出动力学方程、浸出反应表观活化能方面确定了硫酸渣浸出过程的主要控制步骤为内扩散过程控制,得出浸出反应的表观活化能Ea=19.96 kJ/mol。
In order to study the kinetics of copper leaching from pyrite cinder containing 0.87%Cu sulfuric acid slag after being roasted at high temperature,the properties of ore were analyzed by X-ray diffraction and other methods.The effects of ore particle size,initial acidity,liquid-solid ratio,stirring rate,leaching temperature and leaching time on copper leaching in sulfuric acid slag samples were studied experimentally.The unreacted shrinking nucleus model is used to analyze the kinetics of the sulfuric acid slag leaching process.The results show that all factors have a great influence on the leaching rate of copper leaching of sulfuric acid slag;based on the leaching process control model,leaching kinetic equation,leaching reaction appearance in terms of activation energy,the main control step of determining the slag leaching process is internal diffusion reaction controls,and the apparent activation energy of the leaching reaction is Ea=19.96 kJ/mol.
作者
张汉泉
蔡祥
陈官华
肖林波
金艳锋
余洪
ZHANG Hanquan;CAI Xiang;CHEN Guanhua;XIAO Linbo;JIN Yanfeng;YU Hong(School of Resources&Safety Engineering,Wuhan Institute of Technology,Wuhan 430074,China;Hubei Sanning Chemical Co.,Ltd.,Zhijiang 443206,China)
出处
《有色金属工程》
CAS
北大核心
2020年第4期44-50,56,共8页
Nonferrous Metals Engineering
基金
国家自然科学基金资助项目(51974204)
武汉工程大学研究生教育创新基金项目(CX2018089)。
关键词
硫酸渣
铜浸出
缩核模型
表观活化能
sulfuric acid slag
copper leaching
shrinking core model
apparent activation energy
