不同pH值硫酸铁溶液中碳酸盐岩型黄铜矿的浸出机理

Kolela J NYEMBWE; Elvis FOSSO-KANKEU; Frans WAANDERS; Martin MKANDAWIRE

首页> 中文期刊> 《中国有色金属学报（英文版）》 >不同pH值硫酸铁溶液中碳酸盐岩型黄铜矿的浸出机理

不同pH值硫酸铁溶液中碳酸盐岩型黄铜矿的浸出机理

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在pH值0.5～2.5、温度25°C和时间12 h的条件下,研究碳酸盐岩型黄铜矿在H2SO4-Fe2(SO4)3-FeSO4-H2O体系中的溶解行为.实验所用的颗粒粒度为53～75μm.在所有pH条件下,Cu的回收率均低于15％.浸出渣的XRD、SEM-EDS和光学显微镜(OM)分析结果表明,溶解过程中形成了中间相.pH为0.5和1.0时的中间相分别是Cu3.39Fe0.61S4和Cu2S,而pH值为1.5和1.8时的主要矿物为Cu5FeS4.热力学模拟预测产物的生成顺序为CuFeS2→Cu5FeS4→Cu2S→CuS.Cu5FeS4 and Cu2S为可溶性中间相,而CuS和Cu3.39Fe0.61S4是难溶中间相,在整个溶解过程中不断积累.所得结果表明,CuFeS2浸出过程中CuS和Cu3.39Fe0.61S4的生成有助于形成钝化膜.

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《中国有色金属学报（英文版）》 |2021年第007期|2139-2152|共14页
作者
Kolela J NYEMBWE; Elvis FOSSO-KANKEU; Frans WAANDERS; Martin MKANDAWIRE;
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作者单位

Water Pollution Monitoring and Remediation Initiatives Research Group School of Chemical and Minerals Engineering Faculty of Engineering North-West University South Africa;

Department of Chemistry School of Science and Technology Cape Breton University Canada;

Water Pollution Monitoring and Remediation Initiatives Research Group School of Chemical and Minerals Engineering Faculty of Engineering North-West University South Africa;

Water Pollution Monitoring and Remediation Initiatives Research Group School of Chemical and Minerals Engineering Faculty of Engineering North-West University South Africa;

Water Pollution Monitoring and Remediation Initiatives Research Group School of Chemical and Minerals Engineering Faculty of Engineering North-West University South Africa;

Department of Chemistry School of Science and Technology Cape Breton University Canada;

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原文格式 PDF
正文语种 chi
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关键词
黄铜矿; 碳酸岩; 化学浸出; 浸出机理; 中间相; 热力学行为;

不同pH值硫酸铁溶液中碳酸盐岩型黄铜矿的浸出机理

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