| 摘要 |
<p>PROBLEM TO BE SOLVED: To produce an anode for the electrolytic refining of copper capable of reliably preventing the inclusion of Bi into electrolytic copper though Bi is contained in the anode by a simple method and apparatus excellent in economical efficiency. SOLUTION: The anode for the electrolytic refining of copper has a lead content satisfying the conditions (1) 260 (mass-ppm)<=hPb <=600 (mass-ppm) in the case of Bi<40 (mass-ppm), (2) 260 (mass-ppm)<=Pb<=[50.0×Bi-1,400] (mass-ppm) in the case of 40 (mass-ppm)<=Bi<46 (mass-ppm), (3) [50.4×Bi-2,058] (mass-ppm)<=Pb<=[50.0×Bi-1,400] (mass-ppm) in the case of 46 (mass-ppm)<=Bi<71 (mass-ppm) and (4) 1,520 (mass-ppm)<=Pb<=2,150 (mass-ppm) in the case of Bi >=71 (mass-ppm). Metal lead is added to a refining furnace in the dry refining of copper and/or metal lead is added to crude copper aftermelt refining in an anode casting step to produce the objective anode for the electrolytic refining of copper.</p> |
