Method of separating lead from brass recycling circuit, involves subjecting brass recycling circuit to electrolytic copper refining in sulfuric acid, cementation by sodium hydroxide and zinc addition and electrolytic zinc recovery

摘要

A brass recycling circuit is subjected to electrolytic copper refining in sulfuric acid to form copper cathode material. The brass recycling circuit is further subjected to solid-liquid separation (s1), cementation by sodium hydroxide and zinc addition, solid-liquid separation (s2), electrolytic zinc recovery from electrolyte, precipitation with lime and/or sodium hydroxide, electrolytic treatment with addition of water, sulfuric acid and copper-containing sulfuric acid. A brass recycling circuit is subjected to electrolytic copper refining in sulfuric acid to form copper cathode material. The brass recycling circuit is further subjected to solid-liquid separation (s1), cementation by sodium hydroxide and zinc addition, solid-liquid separation (s2), electrolytic zinc recovery from electrolyte, precipitation with lime and/or sodium hydroxide, electrolytic treatment with addition of water, sulfuric acid and copper-containing sulfuric acid, and optionally copper salts and other copper-containing compounds are subjected to electrolytic copper refinement to form copper cathode material.