ISO 23499:2013

INTERNATIONAL ISO
STANDARD 23499
Second edition
2013-07-01
Coal — Determination of bulk density
for the use in charging of coke ovens
Charbon — Détermination de la masse volumique en vrac à des fins
d’enfournement dans les fours à coke
Reference number
©
ISO 2013
© ISO 2013
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ii © ISO 2013 – All rights reserved

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normatives references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Samples and apparatus . 1
5.1 General . 1
5.2 Apparatus . 2
6 Sampling . 2
6.1 Test portion for bulk density . 2
6.2 Test sample . 2
7 Procedure. 2
8 Expression of results . 4
9 Reporting of results . 5
10 Precision . 5
10.1 Repeatability . 5
10.2 Reproducibility . 5
11 Test report . 5
Bibliography . 6
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
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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
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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 1, Coal
preparation: Terminology and performance.
This second edition cancels and replaces the first edition (ISO 23499:2008), which has been
technically revised.
This International Standard is based, with permission of ASTM International, on ASTM D291, Standard
Test Method for Cubic Foot Weight of Crushed Bituminous Coal, copyright ASTM International.
iv © ISO 2013 – All rights reserved

Introduction
The bulk density of coal is influenced by its physical characteristics, such as relative density, shape and
size distribution of the coal particles, on the coal moisture content as well as on the dimensions of the
measuring container. Since the results for coal bulk density change according to variations in the above
factors, it is recommended that a separate size analysis and total moisture determination be made in
accordance with ISO 1953 and ISO 589, respectively.
The present method describes a procedure for determining a reference bulk density for crushed coal
such as that charged into coke ovens. When charging a coke oven, a knowledge of the mass of coal placed
in the oven for maintaining a relatively constant oven charge is a requirement. This test is designed to
obtain a degree of compaction of coal comparable to the densities attained in industrial coke ovens.
INTERNATIONAL STANDARD ISO 23499:2013(E)
Coal — Determination of bulk density for the use in
charging of coke ovens
1 Scope
This International Standard provides description of a cone procedure for determining an uncompacted
bulk density of crushed coal less than 37 mm in size, such as is charged into coke ovens. It focuses on the
uncompacted bulk density of coal resulting from flowing the material into a measuring container (box)
in the absence of compacting forces.
This International Standard does not cover procedures for determining a compacted coal bulk density
nor to the testing of fine or powdered coal (for boiler or utility application) nor to the determination of
bulk density of coal in storage piles.
2 Normat
...