ISO/CD 15968

FINAL
INTERNATIONAL ISO/FDIS
DRAFT
STANDARD 15968
ISO/TC 102/SC 3
Direct reduced iron — Determination of
Secretariat: ABNT
apparent density and water absorption of
Voting begins on:
hot briquetted iron (HBI)
2007-06-13
Voting terminates on:
Minerais de fer préréduits — Détermination de la masse volumique
2007-08-13
apparente et de l'absorption d'eau du fer briqueté à chaud

Please see the administrative notes on page iii

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ISO/FDIS 15968:2007(E)
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ISO/FDIS 15968:2007(E)
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ii © ISO 2007 – All rights reserved

ISO/FDIS 15968:2007(E)
In accordance with the provisions of Council Resolution 15/1993, this document is circulated in the
English language only.
ISO/FDIS 15968:2007(E)
Contents Page
Foreword. v
Introduction . vi
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. 4
8 Expression of results. 5
9 Test report. 5
10 Verification. 6
Annex A (normative) Flowsheet of the procedure for the acceptance of test results . 7

iv © ISO 2007 – All rights reserved

ISO/FDIS 15968:2007(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 15968 was prepared by Technical Committee ISO/TC 102, Iron ore and direct reduced iron,
Subcommittee SC 3, Physical testing.
This second edition cancels and replaces the first edition (ISO 15968:2000), which has been revised to
homogenise with other physical test standards.
ISO/FDIS 15968:2007(E)
Introduction
The test method in this International Standard has been developed to evaluate the resistance of direct
reduced iron in the form of hot briquetted iron (HBI).
The results of this test should be considered in conjunction with other tests used to evaluate the quality of
products from 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.
The apparent density measured in this test may be used to certify that the HBI meets the apparent density
requirements of the International Maritime Organization (IMO) Code of Safe Practice for Solid Bulk Cargoes.

vi © ISO 2007 – All rights reserved

FINAL DRAFT INTERNATIONAL STANDARD ISO/FDIS 15968:2007(E)

Direct reduced iron — Determination of apparent density and
water absorption of hot briquetted iron (HBI)
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 determine the applicability of regulatory limitations prior to its use.
1 Scope
This International Standard specifies a method of determining the apparent density and water absorption of
direct reduced iron by immersion in water.
This International Standard is applicable to hot briquetted iron (HBI).
2 Normative references
The following referenced documents are indispensable for the application of this International Standard. For
dated references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
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.
ISO 10835:2007, Direct reduced iron and hot briquetted iron — Sampling and sample preparation.
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
Dried briquettes are weighed in air, soaked in water, surface-dried and weighed again, first in air and then in
water. The apparent density and water absorption are determined, by calculation, from the masses obtained.
...