1.1 本试验方法包括在4.75℃下通过对含金属矿石和相关材料进行筛分分析来测定粒度分布 mm（4号）筛，更粗。 1.2 以国际单位制表示的数值应视为标准值。括号中给出的值仅供参考，不被视为标准值。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户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（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====== 5.1 本试验方法旨在符合粒度分布的成分规范。假设所有使用该程序的人都是经过培训的分析员，能够熟练、安全地执行常见的实验室操作。预计工作将在配备适当的实验室进行，并遵循适当的废物处理程序。遵循适当的质量控制实践，如指南中所述 E882 .

1.1 This test method covers the determination of the particle size distribution by screen analysis of metal-bearing ores and related materials at 4.75 mm (No. 4) sieve and coarser. 1.2 The values stated in SI units are to be regarded as standard. The values given in parentheses are provided for information only and are not considered standard. 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 This test method is intended to be used for compliance with compositional specifications for particle size distribution. It is assumed that all who use this procedure will be trained analysts capable of performing common laboratory practices skillfully and safely. It is expected that work will be performed in a properly equipped laboratory and that proper waste disposal procedures will be followed. Follow appropriate quality control practices such as those described in Guide E882 .