Combining Jinchuan's nickel-copper smelting process, scattered metallurgical furnace and kiln configuration, large amount of flue gas generation, and complex components, the company successfully developed the first domestic double-rotation and double-adsorption plus tail gas reabsorption to produce acid, and low-concentration sulfur dioxide flue gas caustic soda absorption double Efficient evaporation to produce sodium sulfite and other technologies. Implemented the "blue sky" project focusing on nickel-copper main process flue gas recycling, five major sulfuric acid tail gas, low-concentration flue gas from smelting kiln, and nickel-copper smelting ring desulfurization, and realized the goal of sulfur dioxide resource utilization and reduction, and the environment. Air quality has improved significantly. All nickel and copper smelting pollutant discharge outlets are installed with online monitoring facilities, and are connected to the Jinchang Environmental Protection Bureau Monitoring Center for real-time transmission.
Planning and construction of 50000 m 3 sewage treatment station, heavy metal wastewater treatment station in power plant, and wastewater treatment station in the third plant area, complete renovation of the water treatment facilities and pipe network of the beneficiation plant, transformation of the thermal power company's second overflow water reuse beneficiation, copper electrolysis A series of wastewater treatment projects such as reuse of acid wastewater. Through technological innovation and engineering measures, a plant waste water deployment network system has been established to achieve the matching of wastewater treatment technology, technology, and processing capacity and the balance between the production, treatment, and reuse of heavy metal wastewater, high-salt wastewater, and acid wastewater.
It has fundamentally improved the environmental quality of factories and urban areas, and has made an important contribution for Jinchang to become a national civilized city. The industrial wastewater treatment rate has increased from 91.7% to 100% at the end of the 11th Five-Year Plan, and the utilization of reclaimed water has increased from 10 At the end of the “Fifth Five-Year Plan” period, 12.86 million tons increased to 16.48 million tons; the reuse rate of industrial water reached over 93.4%, effectively alleviating the contradiction in water supply in Jinchang; the ability of waste gas, wastewater, and solid waste to be converted into renewable resources was further improved, which greatly promoted the Further development of the manufacturing industry. A series of innovative achievements have been obtained, the operation quality and benefits of environmental protection facilities have continued to improve, and rich experience has been accumulated for independently preparing large-scale environmental protection projects.