Demonstration project of comprehensive utilization of alkali resources in Xilingol, Su Nite

Xilingol Su Nite Alkali Industry Co., Ltd. is one of the large-scale chemical production enterprises in the field of natural alkali in China, which integrates natural alkali research, mining, processing and sales. The current resource reserve of the open-pit alkali mine owned by the company is160,000 tons. The mine adopts the combined mining technology of internal drawing and external discharging. In dry season, coal seams are mainly mined, and mined-out areas are covered with soil. The precipitation in rainy season and the waste liquid produced by enterprise production are injected into the goaf after precipitation, and the residual alkali ore and thin coal seam in the overburden are further recovered through the water-soluble process, which has produced good benefits. The recovery rate of coal seam is 93% ~ 94%, and the recovery rate of Na2CO3 is more than 80% in non-surface thin coal seam through aqueous solution and natural evaporation. The production water in the whole mining area has been recycled, and the heat energy in the circulating water has also been recovered. Backfilling open pit mines is helpful to the restoration of ecological environment in mining areas. The value created by comprehensive exploitation and comprehensive recovery accounts for 30% of the total industrial output value, and the economic, social and environmental benefits have been coordinated. The open-pit alkali mine owned by the company has a large reserve, and the combined mining technology of internal guiding and external discharging has a high recovery rate. The off-balance-sheet mines are well utilized and the ecological environment of the mining area is well restored, which has good promotion and demonstration significance.