煤炭科学研究院唐山分院设计的JL2550型立轮重介质分选机于1983年1月下旬在开滦范各矿进行鉴定。该机是为开滦范各庄矿重介质选矸车间设计、由大同矿山机械厂和开滦林西机厂制造的。会议认为JL2550型立轮分选机结构简单,占地面积小;提升轮采用托轮支承和棒齿传动,运转良好,磨损较小;洗选+50毫米块煤时,当分选比重为1.9,可能偏差Ep=0.05,数量效率η=99.91％。该立轮分选机是 Coal Institute of Tangshan branch design JL2550 vertical wheel heavy media separator in late January 1983 in Kailuan Fan Mine identified. This machine is designed for the Kailuan Fangezhuang HM Sewage Refueling Workshop designed by Datong Mine Machinery Factory and Kailuan Linxi Machine Factory. The meeting held that JL2550 vertical wheel sorter has the advantages of simple structure and small area; the lifting wheel adopts roller bearing and rod gear transmission and works well with less wear and tear; when washing +50 mm lump coal, when the sorting proportion is 1.9, The possible deviations Ep = 0.05, the quantitative efficiency η = 99.91%. The wheel sorting machine is