摘要
利用三价铁离子(Fe^(3+))的氧化性,采用氯化铁溶液浸取低冰镍,提取其中的镍、铜元素。本研究考察了浸出液固比、浸出温度、浸出时间、氯化铁溶液浓度对镍和铜浸出率的影响。动力学研究表明:氯化铁溶液浸出低冰镍时,镍元素的浸出过程由化学反应控制,铜元素的浸出过程由混合反应控制,经计算镍的浸出活化能为70.26 kJ/mol、铜元素的浸出活化能为38.62 kJ/mol。低冰镍和浸出渣的物相分析结果表明,浸出反应发生时,低冰镍中的硫元素被氧化成单质硫。本研究避免了传统工艺中的含硫气体污染问题。
The oxidation of trivalent iron ions was utilized to extract nickel and copper from a low ice nickel matte in ferric chloride solution.In this study,the effects of the liquid-solid ratio,leaching temperature,leaching time and ferric chloride solution concentration on the leaching rates of nickel and copper were investigated by single-factor tests and orthogonal experiments.The kinetic study shows that the leaching process of nickel in ferric chloride solution is controlled by a chemical reaction,while the leaching process of copper is controlled by mixing.The calculated leaching activation energies of nickel and copper are 70.26 kJ/mol and 38.62 kJ/mol,respectively.In addition,the phase analysis of low-ice nickel and leaching residue shows that the sulfur element in low-ice nickel is oxidized to elemental sulfur when the leaching reaction occurs.Furthermore,the problem of sulfur-containing gas pollution in traditional processes is avoided.
作者
宁志强
唐子瑞
刘家辉
王露
朱飞晓
NING Zhiqiang;TANG Zirui;LIU Jiahui;WANG Lu;ZHU Feixiao(School of Metallurgy,Northeastern University,Shenyang 110819,China)
出处
《有色金属科学与工程》
CAS
北大核心
2022年第3期43-48,共6页
Nonferrous Metals Science and Engineering
基金
国家重点基础研究发展计划(973计划)项目(2014CB643405)。
关键词
低冰镍
氯化铁
浸出
硫
low ice nickel
ferric chloride
leaching
sulfur
