Sustainable Mining and Metallurgy

There were some problems in the open circulating cooling softened water system of Jinchuan Group, such as high water turbidity, high hardness of circulating softened water caused by concentration of Ca²⁺ and Mg²⁺, corrosion and spalling of tower concrete, damage and aging of filler, uncertainty of critical point of resin, etc. Starting from the composition of pollutants in the external environment, the blocking area and the causes of corrosion, the production process of the circulating cooling softened water system and the ion exchanger process were optimized by using the principle of microporous adsorption and cascade filtration of ion exchange resin. The softened water was introduced into the ion exchanger for reprocessing, and the advanced process of “N times small backwash+1 time large backwash” was used for resin regeneration. The turbidity index and microbial corrosion of the circulating cooling softened water were effectively reduced, and the water resources were effectively saved, the operation cost of the cooling circulating softened water production system was reduced, and the service life of the equipment was improved.