ISO 4700:2015

INTERNATIONAL ISO
STANDARD 4700
Fourth edition
2015-08-01
Iron ore pellets for blast furnace
and direct reduction feedstocks —
Determination of the crushing strength
Boulettes de minerais de fer pour charges de hauts fourneaux et
réduction directe — Détermination de la résistance à l’écrasement
Reference number
ISO 4700:2015(E)
©
ISO 2015

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ISO 4700:2015(E)

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© ISO 2015, Published in Switzerland
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ii © ISO 2015 – All rights reserved

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ISO 4700:2015(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 1
5 Sampling, sample preparation and preparation of test portions .1
5.1 Sampling and sample preparation . 1
5.2 Preparation of test portions . 2
6 Apparatus . 2
7 Procedure. 2
7.1 Number of determinations for the test . 2
7.2 Load application . 3
8 Expression of results . 4
9 Test report . 4
10 Verification . 5
© ISO 2015 – All rights reserved iii

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ISO 4700:2015(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 (see 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 (see 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.
For an explanation on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical
Barriers to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 102, Iron ore and direct reduced iron,
Subcommittee SC 3, Physical testing.
This fourth edition cancels and replaces the third edition (ISO 4700:2007) which has been technically
revised to provide clarification in 7.2 when using automatic equipment.
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ISO 4700:2015(E)

Introduction
This International Standard concerns one of a number of physical test methods that have been developed
to measure various physical parameters and characteristics and to evaluate the behaviour of iron
ores, including reducibility, disintegration, crushing strength, apparent density, etc. This method was
developed to provide a uniform procedure, validated by collaborative testing, to facilitate comparisons
of tests made in different laboratories.
The results of this test have to be considered in conjunction with other tests used to evaluate the quality
of iron ores as feedstocks for blast furnace and direct reduction processes.
This International Standard can be used to provide test results as part of a production quality-control
system, as a basis of a contract, or as part of a research project.
© ISO 2
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