Comprehensive recovery method for valuable metals in lead-zinc smelting acid mud

• Main Authors: YANG DAJIN, DAI LONGGUO, LU WENPENG, MA YANHONG, HE YONGYI, YANG WEI, LI YANLIN, PEI QIFEI, ZHOU KAIMIN, HOU JIAO, HE ZONGYUN
• Format: Patent
• Language: Chinese; English
• Published: 09.07.2021
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; FERROUS OR NON-FERROUS ALLOYS; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention relates to a comprehensive recovery method for valuable metals in lead-zinc smelting acid mud, and belongs to the technical field of hazardous waste resource development and utilization. The method is mainly divided into two steps according to the form of a mercury-containing phase, the mercury-containing phase easy to treat is directly subjected to pyrogenic roasting and volatilization recovery, the selenium-containing and mercury-containing phase difficult to treat is converted into the phase easy to treat through wet leaching, and then the easy-to-treat phase is further treated and recycled; and mercury in the acid mud is recovered in the form of elemental mercury, selenium is recovered in the form of crude selenium, and the lead and silver residues are returned to a Isa furnace for smelting and recovery. According to the method, deep removal and separation of mercury and selenium and efficient recovery of lead, silver, selenium and mercury can be achieved, the recovery rate of mercury and se