煤炭工业是基础工业。因为煤炭是我国主要能源,因此对国民经济的发展和“四化”建设有着重要影响。几年来,我国煤炭生产增长很快,原煤产重已跃居世界前列。在国内,煤炭生产和消费都占我国一次能源的70%以上。但是由于对洗选加工重视不够,致使煤的利用受到影响。自1978年以来,入洗比重长期徘徊在18%左右,以致煤炭质量差,品种不全,不能适销对路,热能利用率仅为25%左右,对能源的浪费极大。为了合 Coal industry is the basic industry. Because coal is China’s major energy source, it has an important impact on the development of the national economy and the building of the “four modernizations.” Over the past few years, China’s coal production has grown rapidly, the output of raw coal has leapt to the forefront of the world. In China, coal production and consumption account for more than 70% of China’s primary energy. However, due to inadequate attention to the washing process, resulting in the utilization of coal affected. Since 1978, the share of laundering has hovering around 18% for a long time, resulting in poor quality and incomplete varieties of coal, which can not be marketable. The utilization rate of thermal energy is only about 25%, which is a great waste of energy. In order to meet