| 摘要 |
<p>PURPOSE:To efficiently and continuously produce high-quality electrolytic copper by controlling the concn. of pentavalent Sb in a copper electrolytic bath to less than a specified value to prevent passivation of an anode. CONSTITUTION:When copper is electrolytically refined with the crude copper contg. a large amt. of As, Sb, and Bi as an anode, a part of an electrolyte is drawn off from an electrolytic cell 3. The electrolyte is sent to an SO2 reduction vessel 6, and reduced to control the concn. of pentavalent Sb in the electrolyte to <=0.15g/l. The reduced electrolyte is deaerated in a deaeration vessel 7, and then sent to a circulating vessel 4. Meanwhile, a part of the electrolyte is passed through a chelate resin tower 5, sent to the circulating vessel 4, and mixed with the drawn-out electrolyte and an appropriate additive. The obtained electrolyte is returned to the electrolytic cell 3 via a filter 8.</p> |
