Method for recycling lead, zinc and silver from lead sulfate slag of alkaline leaching zinc smelting

• Main Authors: LI SHIPING, WANG ZHIBIN, WEI GUOLONG, LU YU
• Format: Patent
• Language: Chinese; English
• Published: 21.08.2018
• Subjects: APPARATUS THEREFOR; CHEMISTRY; CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION ORPROCESSING OF GOODS; ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; FERROUS OR NON-FERROUS ALLOYS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; METALLURGY; PRETREATMENT OF RAW MATERIALS; PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY ORREFINING OF METALS; PRODUCTION AND REFINING OF METALS; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS; TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINSTCLIMATE CHANGE; TREATMENT OF ALLOYS OR NON-FERROUS METALS

The invention discloses a method for recycling lead, zinc and silver from lead sulfate slag of alkaline leaching zinc smelting. The method comprises the steps of microwave treatment, leaching, metallic lead electrolysis, metallic zinc powder electrolysis and metallic silver recycling. According to the method, the theory that microwave heating is fast and even, and no cold center or catalytic action exists is adopted, the characteristic that the lead sulfate slag mixed with carbon powder can absorb microwaves more easily and instant high temperature is generated on the carbon powder is adopted,alkaline lixivium and electrolytic treatment are adopted in cooperation, lead, zinc and silver can be effectively recycled from the lead sulfate slag, treatment cost can be reduced, and efficiency can be improved. 本发明公开了种碱性浸出锌冶炼的硫酸铅渣回收铅锌银的方法，该方法包括：微波处理、浸出、电解金属铅、电解金属锌粉、回收金属银；本发明采用微波加热迅速，均匀，无冷中心及催化作用的原理，采用混合碳粉的硫酸铅渣更易吸收微波并在碳粉处产生瞬间高温的特点，配合碱性浸出液及电解处理，不仅能够有效从硫酸铅渣回收铅锌银，又能降低处理成本，提高效率。