ISO 11760:2018
(Main)Classification of coals
Classification of coals
This document describes a simple classification system for coals providing — guidance on the selection of the appropriate ISO standard procedures for the analyses and testing of coals, — international comparison of coals in terms of some key characteristics, — descriptive categorization of coals. The system is applicable to coals of all ranks, but care is required in relation to the classification of some types of coal. The system can be applied to a wide range of representative coal samples, provided their exact nature is stated. Such samples include bore-core seam sections and composite samples, raw (as-mined) coal, washed coal, blends of coals of similar rank and selected, specified size fractions. The system provides a broad framework within which coals can be assessed. The selection of coals for a specific use requires detailed information that enables the likely performance of a coal in a particular application to be anticipated. The wide-ranging list of ISO analyses and test procedures for coals serve this purpose. The selection of the appropriate procedures to be used in assessing a coal depends on the intended use.
Classification des charbons
General Information
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 11760
Second edition
2018-11
Classification of coals
Classification des charbons
Reference number
ISO 11760:2018(E)
©
ISO 2018
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ISO 11760:2018(E)
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ii © ISO 2018 – All rights reserved
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ISO 11760:2018(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope .1
2 Normative references .1
3 Terms and definitions .1
4 Classification .3
4.1 General . 3
4.2 Rank — Primary categories . 3
4.3 Rank — Sub-categories . 4
4.4 Petrographic (maceral group) composition . 5
4.5 Ash yield . 6
5 Nature of the coal sample .6
6 Descriptive classification terminology .7
7 Analytical tolerances .7
8 Graphic representation . 8
Bibliography .9
© ISO 2018 – All rights reserved iii
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ISO 11760:2018(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with I
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