科研之友
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摘要
In order to reduce the energy consumption of copper powder electrowinning, enhance the corrosion resistance of anode and improve the product quality, the Pb-based porous anodes with different pore sizes and various Ag and Ca contents were prepared by counter-gravity infiltration, and compared with plate anodes in following aspects: anodic potential, anodic corrosion rate, morphology and composition of the anodic oxidation film, purity and morphology of cathodic product. The results show that the porous anode can reduce the real anodic current density and decrease anodic oxygen evolution overpotential. For example, the oxygen evolution overpotential of Pb-Ag porous anode (pore diameter of 1.0-1.25 mm) is 131 mV lower than that of Pb-Ag plate anode, which can significantly decrease the energy consumption. Besides, the anodic oxidation film of porous anode changes from loose, powdery form into denser, flatter flaky form, which can enhance the anodic corrosion resistance, reduce the Pb content of copper powder and then improve the product quality.
- 出版日期2013
- 单位中南大学
