1.1 本试验方法包括测定不含除尘添加剂的石油焦的hardgrove可磨性指数（HGI）。该试验方法的程序与试验方法中的程序相同 D409 .本试验方法的章节包含石油焦HGI的重要性和用途、初步样品制备程序以及石油焦特有的程序、精度和偏差数据。 注1: 流动石油焦的粒度稠度（粒度分布）一般为100 %通过6.7 毫米[0.265 in.]筛且大于80 %通过2 mm【10号】筛网。 大部分流动焦炭将通过600 μm【30号】筛网。由于这种细度，HGI值与流动焦炭中的较粗颗粒有关，需要大样本来制备足够的正确颗粒尺寸的材料，用于试验方法 D409 。 1.2 以国际单位制或英寸磅单位表示的数值应单独视为标准。每个系统中规定的值可能不是完全相等的；因此，每个系统应独立使用。将两个系统的值合并可能导致不符合标准。 1.2.1 例外情况-- 哈德格罗夫可磨性指数是无单位的。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 HGI用于预测粗石油焦或煅烧石油焦在用于破碎操作的工业规模磨机中的排名。排名基于所需能量和进给速率或两者。 5.2 HGI还用于选择在混合物中研磨在一起时彼此相容的原石油焦和煤，以使混合物在粒径减小过程中不会发生离析。

1.1 This test method covers the determination of the hardgrove grindability index (HGI) of those petroleum cokes that contain no dedusting additive. The procedure for this test method is the same as in Test Method D409 . Sections of this test method contain the significance and use of the HGI of petroleum coke, preliminary sample preparation procedures, and procedure and precision and bias data specific to petroleum coke. Note 1: The size consistency (particle size distribution) of fluid petroleum coke is generally 100 % passing a 6.7 mm [0.265 in.] sieve and greater than 80 % passing a 2 mm [No. 10] sieve. Much of fluid cokes will pass a 600 μm [No. 30] sieve. Because of this fineness the HGI value is related to the coarser particles in fluid coke and large samples are required to prepare sufficient material of the correct particle size for Test Method D409 . 1.2 The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 1.2.1 Exception— Hardgrove grindability index is unitless. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 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 ====== 5.1 The HGI is used to predict the ranking of raw petroleum cokes or calcined petroleum cokes in industrial size mills used for crushing operations. The rankings are based on energy required and feed rate or both. 5.2 The HGI is also used to select raw petroleum cokes and coals that are compatible with each other when milled together in a blend so that segregation of the blend does not occur during particle size reduction.