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英国重介质选煤始于二十世纪三十年代,当时出现了几个具有试验性质的重介选车间,其中包括1～2个以氯化钙和自然砂为加重剂的车间。1935—1939年,出现了6～7个Barvoy(立轮)分选车间和3个特朗普重介选车间。1939—1945年战争年代,重介质选煤发展缓慢,只增设了四个车间。1957—1958年,重介选在英国迅速发展,各种类型重介选车间相继出现,总数达74个。其间英国煤管局在东北管理局的罗辛顿矿安设了国内第一个Drewboy两产品重介选车间,处理量为250吨/时/台,入料粒度为127—50.8毫米。1960年英国使用了第一台Wemco型滚筒式重介质分选机。同时还使用了三产品强斯(chance)砂浮机(φ4800毫米,生产能力360吨/时),入选粒度为200—25毫米。截止1961年1月,英国使
HMM started in the 1930s in the United States. There were several pilot-scale HM plants, including one or two workshops weighted with calcium chloride and natural sand. Between 1935 and 1939, there were between 6 and 7 Barvoy sorting stations and three Trump Weessees. During the 1939-1945 war, the development of heavy medium coal preparation was slow, adding only four workshops. In 1957-1958, the re-election was rapidly developed in the United Kingdom. Various types of HM plants were successively present, totaling 74. In the meantime, the United Kingdom's Coal Administration established the first Drewboy two-product HM plant in Northeastern Administration at its Rohingden mine with a handling capacity of 250 t / h / t and a feed grain size of 127-50.8 mm. In 1960 Britain used the first Wemco drum heavy media separator. At the same time also used the three products of sand (chance) sand floating machine (φ4800 mm, production capacity of 360 tons / hour), the selected particle size of 200-25 mm. As of January 1961, the British made