各有关单位:随着国民经济的快速发展,能源需求不断增长,煤炭作为我国的基础能源,煤炭用户对煤炭品种和质量要求也进一步提高。因此我国选煤生产和建设也得到快速发展,重介质选煤工艺因其适用范围广、洗选效率高,成为当前国内外选煤技术的发展方向,我国近年新建和改扩建的选煤厂 Relevant units: With the rapid development of the national economy, the demand for energy is constantly increasing. With coal as the basic energy source in China, coal users’ requirements for coal varieties and quality are further enhanced. Therefore, the production and construction of coal preparation in our country have also been developed rapidly. Because of its wide range of application and high washing efficiency, the process of coal preparation has become the development direction of coal preparation technology at home and abroad. In recent years, the coal preparation plant