ISO 1170:2013

INTERNATIONAL ISO
STANDARD 1170
Third edition
2013-07-01
Coal and coke — Calculation of
analyses to different bases
Charbon et coke — Calculs pour les analyses par rapport à
différentes bases
Reference number
ISO 1170:2013(E)
©
ISO 2013

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ISO 1170:2013(E)

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ISO 1170:2013(E)

Contents Page
Foreword .iv
1 Scope . 1
2 Normatives references . 1
3 Principle . 1
4 Symbols . 1
5 Calculations for coal analyses . 2
5.1 Introduction . 2
5.2 Procedure . 2
5.3 Carbon . 2
5.4 Hydrogen . 2
5.5 Nitrogen . 3
5.6 Sulfur . 3
5.7 Oxygen . 3
5.8 Chlorine . 4
5.9 Volatile matter . 4
5.10 Net calorific value . 4
6 Calculations for coke analyses . 4
7 Table for calculation to different bases . 5
Annex A (normative) Mineral matter . 6
Bibliography . 7
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ISO 1170:2013(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 ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2. www.iso.org/directives
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of any
patent rights identified during the development of the document will be in the Introduction and/or on
the ISO list of patent declarations received. www.iso.org/patents
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
The committee responsible for this document is ISO/TC 27, Solid mineral fuels, Subcommittee SC 5,
Methods of analysis.
This third edition cancels and replaces the second edition (ISO 1170:2008), of which it constitutes a
minor revision.
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INTERNATIONAL STANDARD ISO 1170:2013(E)
Coal and coke — Calculation of analyses to different bases
1 Scope
This International Standard gives equations that allow analytical data relating to coal and coke to be
expressed on the various different bases in common use. Consideration is given to corrections that can
be applied to certain determined values for coal prior to their calculation to other bases.
2 Normatives references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
ISO 602, Coal — Determination of mineral matter
ISO 17247, Coal — Ultimate analysis
3 Principle
In order to convert an analytical result expressed on one basis to another basis, it is multiplied by a factor
calculated from the appropriate formulae (see Table 1) after insertion of the requisite numerical values.
4 Symbols
The symbols employed in the subsequent clauses are as follows, with suffixes (separated by a dot)
“ad” (air-dried), “ar” (as-received), “d” (dry), “daf” (dry, ash-free) or “dmmf” (dry, mineral-matter-free)
where appropriate.
w ash, expressed as percent mass fraction
A
w carbon content, expressed as percent mass fraction
C
w chlorine content, expressed as percent mass fraction
Cl
w inorganic chlorine content, expressed as percent mass fraction
Cl.inorg
w carbon dioxide content, expressed as percent mass fraction
CO2
w hydrogen content, excluding hydrogen in the moisture, but including the hydrogen from water
H
of hydration in minerals, expressed as percent mass fraction
w moisture content, expressed as percent mass fraction
H2O
w water of hydration in the mineral matter, expressed as percent mass fraction
h
w mineral matter content, expressed as percent mass fraction (see Annex A)
MM
w nitrogen content, expressed as percent mass fraction
N
w oxygen content, excluding oxygen in the moisture but including the oxygen from water of
O
hydration in minerals, expressed as percent mass fraction
w organic sulfur content, expressed as percent mass fraction
S,o
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ISO 1170:2013(E)

w pyritic sulfur content, expressed as percent mass fraction
S,p
w sulfate sulfur content, expressed as percent mass fraction
S,s
w total sulfur content, expressed as percent mass fraction
S,T
w volatile matter content, expressed as percent mass fraction
V
F national correction factor for the estimation of the inorganic chlorine content
Cl
F national correction factor for the estimation of water of hydration
h
F national correction factor for the estimation of the mineral matter (see Annex A)
MM
5 Calculations for coal analyses
5.1 Introduction
In International Standards covering the analysis of coal, it is generally specified that the determination
shall be carried out on an air-dried test sample. However, in making use of these analyses, it is sometimes
necessary to express or report the results on some other basis. The bases in common use are “air-dried”,
“as-received”, “dry”, “dry, ash-free”, and “dry, mineral-matter-free”.
5.2 Procedure
Any analytical value (except net calorific value) on a particular basis may be converted to any other
basis by multiplying it by the appropriate factor calculated from the formulae given in Table 1, after
insertion of the requisite numerical values for the symbols (for determination of moisture, see ISO 589
and ISO 11722; for ash, see ISO 1171). However, in some determinations, there is a direct involvement of
the mineral matter and, in these cases, it is essential to apply a correction to the air-dried result prior to
its calculation to the dry, mineral-matter-free basis. This correction is dependent on the nature, as well
as the quantity, of the mineral matter present and, for any given sample, the formula recommended by
the national standards organization of the country of origin of the sample should be use
...