ISO 3271:2007
(Main)Iron ores for blast furnace and direct reduction feedstocks — Determination of the tumble and abrasion indices
Iron ores for blast furnace and direct reduction feedstocks — Determination of the tumble and abrasion indices
ISO 3271:2007 specifies a method to provide a relative measure for evaluating the resistance of iron ores to size degradation by impact and abrasion. It covers the determination of the tumble and abrasion indices. ISO 3271:2007 is applicable to lump ores, sinters and hot-bonded pellets.
Minerais de fer pour charges de hauts fourneaux et pour procédés par réduction directe — Détermination des indices de cohésion et d'abrasion
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Standards Content (Sample)
INTERNATIONAL ISO
STANDARD 3271
Fourth edition
2007-10-01
Iron ores for blast furnace and direct
reduction feedstocks — Determination of
the tumble and abrasion indices
Minerais de fer pour charges de hauts fourneaux et pour procédés par
réduction directe — Détermination des indices de cohésion et
d'abrasion
Reference number
ISO 3271:2007(E)
©
ISO 2007
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ISO 3271:2007(E)
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ii © ISO 2007 – All rights reserved
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ISO 3271:2007(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. 2
6 Apparatus . 2
7 Procedure . 3
8 Expression of results . 3
9 Test report . 4
10 Verification . 5
Annex A (normative) Flowsheet of the procedure for the acceptance of test results . 6
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ISO 3271:2007(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.
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 3271 was prepared by Technical Committee ISO/TC 102, Iron ore and direct reduced iron, Subcommittee
SC 3, Physical testing.
This fourth edition cancels and replaces the third edition (ISO 3271:1995), which has been revised to
homogenise with other physical test standards.
iv © ISO 2007 – All rights reserved
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ISO 3271:2007(E)
Introduction
This International Standard concerns one of a number of physical test methods that have been developed to
measure various physical parameters 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 should 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 may 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.
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INTERNATIONAL STANDARD ISO 3271:2007(E)
Iron ores for blast furnace and direct reduction feedstocks —
Determination of the tumble and abrasion indices
CAUTION — This International Standard may involve hazardous operations and equipment. This
standard does not purport to address all of the safety issues associated with its use. It is the
responsibility of the user of this International Standard to establish appropriate safety and health
practices and to determine the applicability of regulatory limitations prior to its use.
1 Scope
This International Standard specifies a method to provide a relative measure for evaluating the resistance of
iron ores to size degradation by impact and abrasion. It covers the determination of the tumble and abrasion
indices.
This International Standard is applicable to lump ores, sinters and hot-bonded pellets.
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.
1)
ISO 3082:2000 , Iron ores — Sampling and sample preparation procedures
ISO 3310-1:2000, Test sieves — Technical requirements and testing — Part 1: Test sieves of metal wire cloth
ISO 3310-2:1999, Test sieves — Technical requirements and testing — Part 2: Test sieves of perforated
metal plate
2)
ISO 4701:— , Iron ores and direct reduced iron — Determination of size distribution by sieving
ISO 11323:2002, Iron ore and direct reduced iron — Vocabulary
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 11323 apply.
4 Principle
The test porti
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