多年来,我国洗精煤干燥脱水及其防冻问题一直没有得到彻底解决,尤其对浮选精煤或煤泥的单独干燥更是个老大难问题;国外干燥技术比较先进的国家如美国、日本、西德、苏联等虽基本上解决了这个问题,但仍在研究探讨新的干燥技术。 Over the years, the dehydration of dehydrated clean coal and the antifreeze problem in our country have not been completely solved. In particular, it is a long-standing problem for individual drying of flotation coal or slime. Countries with advanced foreign drying technologies such as the United States, Japan, Although Germany and the Soviet Union basically solved this problem, they are still studying the new drying technology.