重介质选煤技术具有分选精度高 ,对不同可选性、粒度、矸石含量的原煤适应性强 ,以及操作、调节方便等优点 ,近年来在世界各国已成为主要发展技术。但是传统的重介质选煤工艺对原煤需进行分级、脱泥 ,对需要出两种产品以上的重介质分选 ,需配备高、低密度的重介质悬浮液制备、 Heavy medium coal preparation technology has the advantages of high separation accuracy, strong adaptability to raw coal with different options, granularity and gangue content, and convenient operation and adjustment. In recent years, it has become a major development technology in various countries in the world. However, the traditional heavy medium coal preparation process needs to classify the raw coal and remove mud. For the heavy medium sorting which needs more than two products, it is required to prepare high and low density heavy medium suspensions,