ASTM D409 PDF

Full Description 1. 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 ]. 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.

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Want this as a site license? Changes from the previous issue A redline edition is available for this document, with all changes visible. Ask Document Center Inc. Scope 1. 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 ].

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. Therefore, the repeatability and reproducibility cited in this test method may not apply for these high-volatile bituminous, subbituminous, and lignite coals.

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. 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.

Significance and Use 3.

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ASTM D409/D409M:12

Want this as a site license? Changes from the previous issue A redline edition is available for this document, with all changes visible. Ask Document Center Inc. Scope 1. 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 ]. 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.

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ASTM D409-02

Please first verify your email before subscribing to alerts. You need to log in before adding standards to the monitoring service. The values stated in zstm system may not be exact equivalents; therefore, each system shall be used independently of the other. A prepared and sized sample receives a definite asgm of grinding energy in a miniature pulverizer, and the size consist of the pulverized product is determined by sieving.

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ASTM D409/D409M:12

A number in parentheses indicates the year of last reapproval. This standard has been approved for use by agencies of the U. Department of Defense. INTRODUCTIONThis test method is structured into the following parts:The body of the test method discusses the scope, referenced documents, significance and use,apparatus, gross samples, preparation of test samples, procedure, calculation and report, precision andbias, and keywords. Annex A6 contains the method for determining the moisture content of the 1.

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ASTM D409 PDF

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