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煤,除了供作燃料,在家庭中,在工业上(工厂锅炉,火车、轮船上的锅炉)直接燃烧以外,还可以把它气化,当作气体燃料使用,把它液化,当作液体燃料使用。作为燃料,它也可以做成块状,如煤砖、煤球等和块煤同样地使用,它也可以磨成粉状,随着气体一起由喷口里喷出来燃烧使用。但是煤的用途还不止於这些。将煤乾馏,炼成焦炭,是冶金工业中不可缺少的原料。煤里面还有许多有用的化学成份,我们还可以从煤或是它的副产品中得到许多宝贵的化学原料,因此煤在化学工业中还有很广泛的用途。炼焦为了供给大量的钢铁和其他的金属,需要发展冶金工业。冶金工业是一种复杂的综合性工业,除了矿砂的开
Coal, in addition to being used as fuel, in the home, in the direct combustion of industry (plant boilers, trains, boilers on ships), it can also be gasified, used as a gas fuel, liquefy it, as a liquid fuel use. As a fuel, it can also be made into blocks, such as briquettes, briquettes, etc., as well as lump coal. It can also be pulverized and used as a gas to be combusted from the spout. However, the use of coal does not stop there. The dry distillation of coal and refining into coke are indispensable raw materials in the metallurgical industry. There are many useful chemical components in coal, and we can also get a lot of valuable chemical raw materials from coal or its by-products, so coal has a very wide range of uses in the chemical industry. Coking requires the development of the metallurgical industry in order to supply large quantities of steel and other metals. Metallurgical industry is a complex and comprehensive industry, except for the opening of ore