ASTM E276-21 含金属矿石和相关材料在475mm（4号）筛和更细筛上粒度或筛分分析的标准试验方法.pdf

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 Remendations issued by the World Trade Organization Technical Barriers to Trade (TBT)Committee. Designation:E276-21 INTERNATIONAL Standard Test Method for Particle Size or Screen Analysis at 4.75 mm (No.4)Sieve and Finer for Metal-Bearing Ores and Related Materials' This standard is issued under the fixed designation E276:the number immediately following the designation indicates the year of original adoption or in the case of revision the year of last revision.A number in parentheses indicates the year of last reapproval.A superseript epsilon (8)indicates an editorial change since the last revision or reapproval. 1.Scope 3.Terminology 1.1 This test method covers the determination of the particle 3.1 Definitions: size distribution by screen analysis dry or wet of metal- 3.1.1 For definitions of terms used in this test method refer bearing ores and related materials at 4.75 mm (No.4)sieve and to Terminology E135. finer. 1.2 Units-The values stated in SI units are to be regarded 4.Summary of Test Method as standard.The values given in parentheses after SI units are 4.1 The sample is passed through a bank of sieves by provided for information only and are not considered standard.agitation.The dry screening technique described in this test 1.3 This standard does ...