Method for recycling lead from copper pyrogenic process smelted smoke acid leaching slag

• Main Authors: PENG GUOMIN, WU YUEBIAO, LI XIAOHENG, WANG XIA, TIAN JING, WANG TINGYUAN
• Format: Patent
• Language: Chinese; English
• Published: 15.11.2019
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a method for recycling lead from copper pyrogenic process smelted smoke acid leaching slag, and belongs to the technical field of nonferrous metal hydrometallurgy. The method for recycling the lead from the copper pyrogenic process smelted smoke acid leaching slag comprises the following steps that (1) bismuth is separated from smoke acid leaching slag, specifically, a mixture of hydrochloric acid and calcium chloride is added according to a liquid-solid ratio of (3-5) to 1, reaction is carried out for 1-3 hours under 70-85 DEG C, filtering is carried out, filter slag is bismuth leaching slag, a filter liquor is a bismuth leaching liquor, and bismuth oxychloride is neutralized and recycled in the bismuth leaching liquor; (2) reduced lead is converted, specifically,the bismuth leaching slag is added into a calcium chloride solution with the temperature of 20-80 DEG C and the concentration of 20-200g/L according to the liquid-solid ratio of (1-4) to 1, then ironpowder with the theoretica