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    ASTM D409/D409M-09

    Standard Test Method for Grindability of Coal by the Hardgrove-Machine Method
    • 발행일 : 2009-05-01
    • 발행기관 : ASTM
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분야 05.06 : 기체화 연료; 석탄 및 코커스
적용범위

1.1 This test method covers the determination of the relative grindability or ease of pulverization of coals in comparison with coals chosen as standards. A prepared and sized sample receives a definite amount of grinding energy in a miniature pulverizer, and the size consist of the pulverized product is determined by sieving. The resultant size consist is used to produce an index relative to the ease of grinding (Hardgrove Grindability Index (HGI)).

1.1.1 Some coals, such as some high-volatile bituminous, subbituminous, and lignite coals, can undergo physical change as the natural or seam moisture is released during handling and preparation. This change is often sufficient to alter the grindability characteristics that will be reported when tested in the laboratory and could produce different indices dependent on the conditions of drying and the moisture level of the 1.18-mm by 600-μm (No. 16 × No. 30) (see Test Method D 4749) materials used for the test. Therefore, the repeatability and reproducibility cited in this test method may not apply for these high-volatile bituminous, subbituminous, and lignite coals.

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.

1.3 It is recognized that the term weight is considered equivalent to mass as used in this test method.

1.4 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 and health practices and determine the applicability of regulatory limitations prior to use.
국제분류(ICS)코드 73.040 : 석탄
페이지수 17
Edition 09

이력정보

No. 표준번호 표준명 발행일 상태
1 ASTM D409/D409M-24상세보기 Standard Test Method for Grindability of Coal by the Hardgrove-Machine Method 2024-07-01 표준
2 ASTM D409/D409M-24 REDLINE상세보기 Standard Test Method for Grindability of Coal by the Hardgrove-Machine Method 2024-07-01 표준
3 ASTM D409/D409M-16상세보기 Standard Test Method for Grindability of Coal by the Hardgrove-Machine Method 2016-09-01 구판
4 ASTM D409/D409M-16 REDLINE상세보기 Standard Test Method for Grindability of Coal by the Hardgrove-Machine Method 2016-09-01 구판
5 ASTM D409/D409M-12상세보기 Standard Test Method for Grindability of Coal by the Hardgrove-Machine Method 2012-10-01 구판
6 ASTM D409/D409M-12e1상세보기 Standard Test Method for Grindability of Coal by the Hardgrove-Machine Method 2012-10-01 구판
7 ASTM D409/D409M-11ae1상세보기 Standard Test Method for Grindability of Coal by the Hardgrove-Machine Method 2011-12-01 구판
8 ASTM D409/D409M-11a상세보기 Standard Test Method for Grindability of Coal by the Hardgrove-Machine Method 2011-12-01 구판
9 ASTM D409/D409M-11상세보기 Standard Test Method for Grindability of Coal by the Hardgrove-Machine Method 2011-04-01 구판
10 ASTM D409/D409M-09ae1상세보기 Standard Test Method for Grindability of Coal by the Hardgrove-Machine Method 2009-11-01 구판
11 ASTM D409/D409M-09a상세보기 Standard Test Method for Grindability of Coal by the Hardgrove-Machine Method 2009-11-01 구판
12 ASTM D409/D409M-09상세보기 Standard Test Method for Grindability of Coal by the Hardgrove-Machine Method 2009-05-01 구판

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