干法选煤与湿法选煤相比较,有许多独特之处,在分选过程中不需要大量洗水,可以减少或省掉复杂的煤泥水处理系统,工艺较简单,投资与成本较低,能减轻或避免煤泥水造成的环境污染。由于经干洗的产品水份低,可以解决在高寒地区因产品水份高造成的冻结,也适用于干旱缺水地区的选煤。目前,美国、俄罗斯、中国、加拿大、英国、德国、 Compared with wet coal preparation, dry coal preparation has many unique features. It does not require a lot of water washing in the sorting process, which can reduce or eliminate complicated slime water treatment system. The process is simple, the investment and the cost are lower , Can reduce or avoid the environmental pollution caused by slime water. Due to the low water content of the dry-cleaned products, it can solve the freezing caused by the high product moisture in the alpine region and also apply to the coal preparation in arid and dry areas. At present, the United States, Russia, China, Canada, Britain, Germany,