前言近四十年来,虽然石油和天然气资源得到了大量的开发,能源和化工原料路线也随之发生了很大的变化,但由于煤炭的储量大,分布广,资源丰富,所以世界上各产煤国对如何充分利用煤炭资源(特别是对于劣质煤的利用)的研究,从未间断过.近年来,更有加强的趋势. Foreword In the past four decades, although oil and natural gas resources have been extensively developed, energy and chemical raw material routes have also undergone great changes. However, because coal reserves are large, widely distributed, and rich in resources, the world produces The study on how to make full use of coal resources (especially for the use of low-quality coal) by the coal-mining countries has never stopped. In recent years, there has been a stronger trend.