为了精煤冬季不冻,东北、西北、华北地区的洗煤厂生产的精煤水分要求控制在10%以下,力争达到8%。现有的办法,是把浮选精煤先在大气中真空过滤(下称大气过滤),再单独或和13～0.5毫米洗精煤混合,用火力干燥机干燥。通化矿务局湾沟煤矿洗煤厂广大工人、干部和技术人员,遵照毛主席关于“打破洋框框,走自己工业发展道路”的教导,发扬了自力 In order to freeze winter coal in winter, northeast, northwest, coal washing plant in North China to produce clean coal moisture requirements below 10%, and strive to reach 8%. The existing method is to first flotation clean coal in the atmosphere by vacuum filtration (hereinafter referred to as atmospheric filtration), and then alone or with 13 ~ 0.5 mm clean coal mixed with the power dryer dry. The general workers, cadres and technicians of the coal washing plant at Wanghou Coal Mine, Tonghua Mining Bureau, followed Chairman Mao’s teachings on “breaking the framework of the world and taking the road of industrial development”