ISO 8371:2015

INTERNATIONAL ISO
STANDARD 8371
Third edition
2015-08-01
Iron ores for blast furnace
feedstocks — Determination of the
decrepitation index
Minerais de fer pour charges de hauts fourneaux — Détermination de
l’indice de décrépitation
Reference number
©
ISO 2015
© ISO 2015, Published in Switzerland
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ii © ISO 2015 – All rights reserved

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 Heating . 2
7.3 Sieving . 3
8 Expression of results . 3
9 Test report . 3
10 Verification . 4
Bibliography . 5
Foreword
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described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
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The committee responsible for this document is ISO/TC 102, Iron ore and direct reduced iron,
Subcommittee SC 3, Physical testing.
This third edition cancels and replaces the second edition (ISO 8371:2007) which has been technically
revised to address the care needed during hand sieving, to introduce the mechanical sieving and to
exclude the reference to ISO 4701.
iv © ISO 2015 – All rights reserved

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 processe
...