ASTM-D441 Standard Test Method of Tumbler Test for Coal

ASTM-D441 - 2007 R19(E1) EDITION - CURRENT
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Standard Test Method of Tumbler Test for Coal
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Scope

1.1 This test method covers the determination of the relative friability of a particular size of sized coal. It affords a means of measuring the liability of coal to break into smaller pieces when subjected to repeated handling at the mine or subsequently, by the distributor or by the consumer. This test method is serviceable for ascertaining the similarity of coals in respect to friability rather than for determining values within narrow limits to emphasize their dissimilarity. This test method also may serve to indicate the relative extent to which sized coals will suffer size degradation in certain mechanical feed devices. This test method may be used for differentiating between certain ranks and grades of coal, and therefore the test method is of service for coal classification purposes.

1.2 The values stated in inch-pound units shall be regarded as the standard. Mass may be expressed in metric values.

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 and health practices and determine the applicability of regulatory limitations prior to use.

Keywords

breakage; coal; coal handling; friability; size stability; tumbler; ICS Number Code 73.040 (Coals)

To find similar documents by ASTM Volume:

05.06 (Gaseous Fuels; Coal and Coke)

To find similar documents by classification:

73.040 (Coals Including lignites Coal products, see 75.160.10)

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Document Number

ASTM-D0441-07R19E01

Revision Level

2007 R19(E1) EDITION

Status

Current

Modification Type

Reapproval

Publication Date

Dec. 1, 2019

Document Type

Test Method

Page Count

4 pages

Committee Number

D05.07