Fundamental Application of Basket Electrolysis Method for Black-Copper Anode

Crude copper with a high content of impurities derived from secondary raw materials, known as black-copper, cannot be used in the conventional electrorefining process because passivation. The current industrial for which involves combination high-temperature acid dissolution under pressure, and subsequent electrowinning, results power consumption. In this study, basket electrolysis method was investigated an alternative black-copper. Basket experiments were performed using black-copper alloy samples shaped into shot diameter 2.5 mm. anodic behaviors respect to connection between anode supporting conductor, shape, number anodes, composition, i.e., without Ag, investigated. Relatively ratios, greater than 70%, obtained all cases when multiple-shot anodes 10 or more shots used. film formed on surface is thought contribute maintenance by providing ion-conducting paths via electrolyte-filled pores, electron-conducting metal particles. This enabled application method.