Liyuanhe coal mine of Xuangang coal power company built a 2.4mt/a dry process coal preparation plant in 2014. In order to further improve the efficiency of the coal preparation plant and reduce costs, the mine entrusted Shenzhou group to contract and operate in October 2016, so as to realize the high-quality and efficient operation of the coal preparation plant. Since the plant has been operated by Shenzhou, the coal preparation output has increased, the energy consumption has been significantly reduced, the separation accuracy has been greatly improved, and the calorific value of cleaned coal has increased by 1200kcal / kg, which has won the recognition of customers with professional services and achieved mutual benefit and win-win results.