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煤炭的开发与利用造成的环境问题已经成为影响中国经济和社会发展的一个制约因素,发展洁净煤技术具有特别重要的意义。选煤为煤炭燃烧前净化技术的主要组成部分,近年来选煤工业的发展进度已超过了原煤增长速度,1 995年国有重点煤矿有选煤厂2 2 8处,1 997年全国原煤入洗率达2 5
The environmental problems caused by the development and utilization of coal have become a constraint factor to China’s economic and social development. The development of clean coal technology is of particular significance. Coal preparation is a major component of coal combustion purification technology. In recent years, the development progress of coal preparation industry has surpassed the growth rate of raw coal. In 1995, the state-owned key coal mines had 2280 coal preparation plants and the nationwide raw coal washing in 1997 Rate of 25