GUD—30型无格折带过滤机于一九七五年在唐山煤炭研究所开始进行实验室与半工业性试验。它具有槽深、无格及拆带卸料的特点,比普通圆筒式或折带式过滤机回收浮选尾煤,具有单位面积处理能力高、滤饼水份较低的优点。唐山煤炭研究所与沈阳选矿机械研究所协作进行设计, The GUD-30 filter-free bed filter started its laboratory and semi-industrial test in Tangshan Coal Research Institute in 1975. The utility model has the advantages of groove depth, gridless disassembly and unloading, and has the advantages of higher processing capacity per unit area and lower water content of the filter cake than recovery of the flotation coal tailings by the ordinary barrel type or folding belt type filter. Tangshan Coal Institute and Shenyang Mineral Processing Machinery Institute collaborative design,