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Mechanism of crud formation in copper solvent extraction

Mechanism of crud formation in copper solvent

extraction

柳建设;蓝卓越;邱冠周;王淀佐

【期刊名称】《中南大学学报(英文版)》

【年(卷),期】2002(009)003

【摘要】The authors investigated the mechanism of crud formation in copper solvent extraction. It is indicated that pH value of solution and the phase ratio (O/A) are the main factors affecting crud formation in solvent extraction. The amount of crud extraction increases with aqueous pH value increase, and reduces with the increase of the phase ratio. Fe3+, Mg2+, fine air bubble and suspended particulates in leaching solution contribute to crud formation. One case is that a series of reactions of hydrolization and polymerization occurs for Fe3+, while pH>2.5, polyhydric complex or Fe-SO4 complex are formed. Then the complex-ions of FeOH2+, Fe2(OH)4+2 cause poly-reaction, which is likely to lead emulsion. The study on Zeta potential indicates the repulsion between electriferous droplets in solvent extraction prevents phase coalescence, which is one of the major reasons for emulsion.

【总页数】4页(169-172)

【关键词】copper;extraction;crud;mechanism;Zeta potential

【作者】柳建设;蓝卓越;邱冠周;王淀佐

【作者单位】School of Resources Processing and Bioengineering,