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早在二千多年以前,我国劳动人民就知道煤可以燃烧。在公元一世纪时,煤的开采就已经具有一定规模,并开始用来炼铁。煤到底是什么?它还有什么更广的用途?只有科学技术高度发达的今天,煤才被人类完全认识和充分利用。煤的形成经历了漫长的年代。远古时代的植物随着地壳和地形的变化被深埋在地下,经过几百万年以上的地压和地热的作用而碳化、变质,逐渐形成了今天的煤。在煤炭家族中,有无烟煤、烟煤和褐
As early as 2,000 years ago, our working people knew that coal could be burned. In the first century AD, coal mining had already reached a certain scale and began to be used for iron making. What is the use of coal and what is it more widely used? Only when science and technology are highly developed is coal fully recognized and fully utilized by humans. The formation of coal has gone through a long period of time. Plants in ancient times were buried deep underground with changes in the earth’s crust and topography. After millions of years of ground pressure and geothermal effects, they were carbonized and deteriorated, gradually forming today’s coal. In the coal family, there is no bituminous coal, bituminous coal and brown