ISO 501:2003

SLOVENSKI STANDARD
SIST ISO 501:2005
01-november-2005
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Hard coal -- Determination of the crucible swelling number
Houille -- Détermination de l'indice de gonflement au creuset
Ta slovenski standard je istoveten z: ISO 501:2003
ICS:
73.040 Premogi Coals
SIST ISO 501:2005 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST ISO 501:2005

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SIST ISO 501:2005


INTERNATIONAL ISO
STANDARD 501
Third edition
2003-11-01

Hard coal — Determination of the
crucible swelling number
Houille — Détermination de l'indice de gonflement au creuset




Reference number
ISO 501:2003(E)
©
ISO 2003

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SIST ISO 501:2005
ISO 501:2003(E)
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ii © ISO 2003 — All rights reserved

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SIST ISO 501:2005
ISO 501:2003(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
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International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
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.
ISO 501 was prepared by Technical Committee ISO/TC 27, Solid mineral fuels, Subcommittee SC 5, Methods
of analysis.
This third edition cancels and replaces the second edition (ISO 501:1981), which has been technically revised.

© ISO 2003 — All rights reserved iii

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SIST ISO 501:2005

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SIST ISO 501:2005
INTERNATIONAL STANDARD ISO 501:2003(E)

Hard coal — Determination of the crucible swelling number
1 Scope
This International Standard specifies a method for determining the swelling properties of hard coal when
heated in a covered crucible. The terminology of “Crucible Swelling Number” or CSN is also known as “Free
Swelling Index” or FSI.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 13909-4:2001, Hard coal and coke — Mechanical sampling — Part 4: Coal — Preparation of test
samples
3 Principle
A sample of coal is heated in a covered crucible under standard conditions of time and temperature. The
shape of the coke button obtained is classified by comparison with the outlines of a set of standard profiles.
4 Preparation of the test sample
The test sample is the general analysis sample prepared in accordance with ISO 13909-4. Ensure that the
moisture content of the sample is in equilibrium with the laboratory atmosphere, exposing it, if necessary, in a
thin layer for the minimum time required to achieve equilibrium.
Avoid both very fine grinding and undue exposure of the ground coal to the atmosphere as oxidation of the
coal provides misleading results.
For coals that can be proven to be stable, analysis should be carried out as soon as possible after sample
preparation. With coals especially liable to oxidation, carry out the test as soon as possible, but not more than
2 h after grinding, unless the sample can be stored in an inert atmosphere.
Before commencing the determination, thoroughly mix the test sample for at least 1 min.
5 Apparatus
5.1 Crucible and lid (see Figure 1)
Silica crucible, squat form, and silica lid with ring handle. The crucible shall conform to the following
specifications:
External height: 26 ± 1,0 mm
External diameter at top: 41 ± 1,0 mm
© ISO 2003 — All rights reserved 1

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SIST ISO 501:2005
ISO 501:2003(E)
Internal diameter at base: 14 ± 2,0 mm
Mass: 12 ± 1,0 g
Capacity: 16 to 17,5 ml
Dimensions in millimetres

Key
1 Flat surface required
2 Lid
3 Crucible
Figure 1 — Crucible with lid for swelling test
5.2 Pierced silica lid (see Figure 2)
Similar to that described in 5.1 but with a 6 mm hole through which the thermocouple (5.7) can pass.
Dimensions in millimetres

Figure 2 — Pierced crucible lid
2 © ISO 2003 — All rights reserved

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SIST ISO 501:2005
ISO 501:2003(E)
5.3 Triangle, consisting of silica tubing of 6 to 6,5 mm external diameter, mounted on nickel/chromium wire
or a triangle formed of solid silica, the length of each side being approximately 55 mm to 60 mm.
5.4 Burner, capable of giv
...