Effect of copper and iron ions on the sulphidizing floatation of copper in copper smelting slag

2018 International Conference of Green Buildings and Environmental Management

土木建筑工程;生态环境科学

Pan, Qing-Qing^1,2 ; Peng, Hui-Qing^1

School of Resource and Environment, Wuhan University of Technology, Wuhan

200245, China^1

School of Mechanical, Shanghai Dianji University, Shanghai

201306, China^2

关键词: Adsorption amounts;    Effect of coppers;    Inhibition effect;    Metallic copper;    Oxidized sulfurs;    Recovery rate;    Solid surface;    Valence state;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/186/3/012011/pdf
DOI  :  10.1088/1755-1315/186/3/012011

来源: IOP

【 摘 要 】

This study investigates the influence of Na2S, CuSO4 and FeCl3 on sulphidizing floatation of copper in copper smelting slag. The results show that copper has a good floatability, independent of the addition of Na2S and Cu2 + ions, while Fe3+ inhibits the floatation. In the pH range between 2 and 4, in conditions with Na2S and Cu2 + ions addition, the recovery rate of metal copper rapidly increased and maintained the high level. But the inhibition effect of Fe3+ was enhanced with the increasing of the concentration. Further analysis shows that the Cu2+ and Fe3+ both enhance the surface potential, but with addition of Na2S, Fe3+ and Cu2+ get an opposite effect. Sodium sulfide would formed polysulfide, Monosulfides and polysulfides on solid surface. The addition of Cu2+ would not increase the adsorption amount of S2p on Cu surface and Fe3+ would not only oxidized sulfur ions thus reduce the adsorption and change the valence state of sulfur, but also oxidized metallic copper.