Quality-divided treatment method for gold smelting wastewater

• Main Authors: LIN FENGXIAN, WU ZENGLING, QIU JUNJIE, LAI BIN, WU WEIHUANG, JI CHANGQING, SUN GENRONG
• Format: Patent
• Language: Chinese; English
• Published: 10.12.2021
• Subjects: CHEMISTRY; FERROUS OR NON-FERROUS ALLOYS; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PRETREATMENT OF RAW MATERIALS; PRODUCTION AND REFINING OF METALS; SEPARATION; TRANSPORTING; TREATMENT OF ALLOYS OR NON-FERROUS METALS; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention discloses a quality-divided treatment method for gold smelting wastewater. The method comprises the following operation steps of: 1, independently pumping extraction wastewater into a micro-electrolysis filler catalytic oxidation reaction tank, controlling the flow rate and the reaction retention time under an aeration condition to enable the COD to reach 20-40 mg/L, and then entering a comprehensive regulating tank; 2, mixing the impurity-removed wastewater, the reduced wastewater and alkali liquor water, performing linkage control on an acid-base neutralization reaction point through an intelligent pH sensor, enabling the pH value of the mixed liquor to be 7.5-8.5, performing plate-frame pressure filtration, recovering copper hydroxide precipitates from filter residues, and enabling filtrate to enter the comprehensive regulating tank; 3, supplementing strong brine generated by an MVR system into the electrolyzed water, removing cyanide and ammonia nitrogen in an electrocatalytic oxidation reac