A large amount of flue gas is generated in the copper smelting process in Zhongyuan Gold Smelter.The quantity of the flue gas is large,the composition is complex and varying,and on some extreme occasions,the environmental index goes wrong and the concentration of PM and SO2 exceeds standards against the increasingly rigid environmental protection requirement.According to the characteristics,treatment processes and status quo of copper smelting flue gas,the environmental flue gas is further desulfurized,dedusted by introducing environmental equipment such as liquid caustic soda spray tower,electric demister,tower electricity integration.The treated environmental flue gas emission concentration is PM<10 mg/m³,SO₂<50 mg/m³,meeting the ultra-low emission standard of Henan Province.The treatment process can save over 0.9 million yuan environmental tax annually,and can recover valuable dust and mud from the flue gas,achieving outstanding environmental and economic benefits.