1.1 该分类涵盖了被称为磨煤的复合材料。它通常用作橡胶化合物的填充剂。 1.2 根据粒度、灰分和水分，有三个等级的磨煤。这些特性的选定值适用于橡胶化合物。 1.3 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 3.1 磨煤通常用作橡胶化合物中的廉价填料，直接或部分替代炭黑，或用作化合物中的稀释剂。 3.2 磨煤与大多数橡胶非常相容，很容易混合到化合物中。

1.1 This classification covers the compounding material known as ground coal. It is generally used in rubber compounds as a filler. 1.2 There are three grades of ground coal based on particle size, ash, and moisture. The selected values for these properties are suitable for use in a rubber compound. 1.3 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 3.1 Ground coal is commonly used as an inexpensive filler in rubber compounds as a direct or partial replacement for carbon black or as a diluent in the compound. 3.2 Ground coal is very compatible with most rubbers and is very easily mixed into the compound.