|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||In Situ Observation of the Precipitation of Copper Sulfate Hydrate on the Copper Based Anode Surface
||Yuma Ninomiya, Hideaki Sasaki, Takeshi Yoshikawa, Masafumi Maeda
|On-Site Speaker (Planned)
In a copper recycling process, the crude copper containing the large amounts of impurities is generated after smelting the copper scraps. Such low-grade copper cannot be subjected to electrorefining because of anode passivation caused by precipitation of copper sulfate hydrate so that it is refined by a more energy consuming process such as electrowinning. Hence, a fundamental understanding of passivation and preventive method are required to achieve a cost-effective copper recycling process through electrorefining. In this study, the precipitation mechanism of copper sulfate hydrate is investigated with an <I>in situ</I> observation of the copper-based anode surface. It is confirmed that the passivation behavior depends on the growth mode of copper sulfate hydrate.
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