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一、概述目前商品煤分类是按其用途,加工方法和质量规格划分的,即以所含灰分、水分、粒度、牌号及品种(精煤、粒级煤、洗选煤、原煤、水采原煤、低质煤等)确定等级。这可做为制定煤炭商品价格的标准。煤种牌号通常按生成年代、变质程度所呈现出的物理化学特性分为无烟煤、烟煤、褐煤三大类。细分的方式很多。我国煤种牌号系根据1958年4月国家科学技术委员会推荐的《中国煤分类方案》划分的,摘要示于表1,分类的指标主要是煤的可燃基挥发分产率和胶
I. Overview At present, the classification of commercial coal is divided according to its use, processing methods and quality specifications, that is, by containing ash, moisture, grain size, grades and varieties (coal, coal, washing coal, raw coal, , Low-quality coal, etc.) to determine the level. This can be used as a standard for setting coal commodity prices. Coal grades are usually generated according to the age, metamorphism showed by the physical and chemical characteristics are divided into anthracite, bituminous coal, lignite three categories. There are many ways to segment. Coal grades in China are based on the “China Coal Classification Scheme” recommended by the National Science and Technology Commission in April 1958. The digests are shown in Table 1. The indicators for classification are mainly the volatile content of combustible base and the plasticity of coal