金在含黄铜矿的氰化物溶液中的溶解(英文)
发布时间:2021-05-21 03:03
利用旋转圆盘电极研究了金在有黄铜矿存在的缺氧氰化物溶液中的阳极溶解特性。研究发现:黄铜矿的存在会削弱金在低电位区的氰化溶解活性,但会增强其在高电位区的溶解活性。在电位≤177m V时,金的溶解过程控制步骤与体系中氰化物浓度有关,当氰化物浓度低于980mg/L时,金的溶解过程受扩散控制;当氰化物浓度高于980mg/L时,金的阳极溶解电流密度降低,溶解过程由扩散控制转变为电化学反应控制。在电位>177 mV时,金的阳极溶解始终受扩散控制,而与体系中氰化钠浓度无关。同时,在含黄铜矿的氰化物溶液中,适当提高体系pH值和升高温度可以促进金阳极溶解,但是pH>11.5也会促进钝化作用的产生而对金的氰化溶解不利。
【文章来源】:Journal of Central South University. 2020,27(05)EISCICSCD
【文章页数】:8 页
【文章目录】:
1 Introduction
2 Experimental
2.1 Minerals and reagents
2.2 Electrochemical test
3 Results and discussion
3.1 Effect of chalcopyrite on dissolution of gold
3.2 Effect of cyanide concentration
3.3 Effect of pH
3.4 Effect of rotation rate
3.5 Effect of temperature
4 Conclusions
【参考文献】:
期刊论文
[1]Solvent extraction of copper and zinc from bioleaching solutions with LIX984 and D2EHPA[J]. 蓝卓越,胡岳华,柳建设,王军. Journal of Central South University of Technology(English Edition). 2005(01)
本文编号:3198922
【文章来源】:Journal of Central South University. 2020,27(05)EISCICSCD
【文章页数】:8 页
【文章目录】:
1 Introduction
2 Experimental
2.1 Minerals and reagents
2.2 Electrochemical test
3 Results and discussion
3.1 Effect of chalcopyrite on dissolution of gold
3.2 Effect of cyanide concentration
3.3 Effect of pH
3.4 Effect of rotation rate
3.5 Effect of temperature
4 Conclusions
【参考文献】:
期刊论文
[1]Solvent extraction of copper and zinc from bioleaching solutions with LIX984 and D2EHPA[J]. 蓝卓越,胡岳华,柳建设,王军. Journal of Central South University of Technology(English Edition). 2005(01)
本文编号:3198922
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