目前英国排往矸石山的矸石量占原煤产量的1/2,其中小于500μm级占15—20%;每年所处理的尾煤量达4—5Mt。这样,在条件允许的情况下,用沉淀池处理尾煤水是最经济的方法,但还得用箱式压滤机把关。这种过滤法在技术上虽然可行,但成本昂贵,在大型选煤厂中使用压滤机时,台机的一次滤饼排放量高达120t/h,这对向矸石山排弃造成了很大困难。而多辊带式压滤机在处理同一尾煤时的成本要比箱式压滤机低得多,但需大量絮凝 At present, the amount of gangue discharged to the gangue hill in the United Kingdom accounts for one-half of that of the raw coal, of which, less than 500 μm account for 15-20% of the total; and tailings coal handled annually reaches 4-5 Mt. In this way, when the conditions permit, the use of sedimentation tank tailings water treatment is the most economical way, but have to use the box filter press check. This filtration method technically feasible, but the cost is expensive, the use of filter press in a large coal preparation plant, the Taiwan machine a filter cake emissions up to 120t / h, which caused a lot to abandon the waste dump difficult. The multi-roll belt filter press in the treatment of the same cost when compared with the box filter is much lower, but a lot of flocculation