周期的反転電流による銅の電解精製の工業化試験
高電流密度の銅の電解精製に関する研究 (第3報)
1969 年 85 巻 975 号 p. 516-520
詳細
1969 年 85 巻 975 号 p. 516-520
Large scale tests on the application of periodic reverse current in electrolytic refining of copper were carried out at the pilot plant of Hitachi Refinery. A thyrister rectifier with an output capacity of D. C. 13, 000A was installed for the tests to generate the periodic reverse current. High current density of 350-400 A/m2 (effective) was applied under normal electrolytic conditions.
Under these conditions, an anode passivation and other abnormal phenomenon did not occur and the appearance and deposition of cathode was found to be satisfactory. From the tests, it was confirmed that the technique of periodic reverse current could be applied in the electrolysis in industrial scale.
The cathode copper obtained from thses pilot plant tests were melted and casted into wire bars. Any differences in electric conductivity was not found between these wire bars and those of cathode copper obtained from the usual operation under 200-250A/m2 D. C.
