ISO 11536:2015

Iron ores — Determination of loss on ignition — Gravimetric method

ISO 11536:2015 specifies a gravimetric method for the determination of the loss in mass of fully-oxidized iron ores, when ignited at 1 000 °C. This method is applicable to a concentration range of 1,0 % (m/m) to 10,0 % (m/m) loss on ignition in natural iron ores, iron ore concentrates and agglomerates. The method is not applicable to the following: a) Processed ores containing metallic iron (direct reduced iron); b) Natural or processed ores in which the sulfur content is higher than 0,2 % (m/m); c) Natural or processed ores in which the content of partially-oxidized iron is more than 1,0 % (m/m).

Minerais de fer — Détermination de la perte au feu — Méthode gravimétrique

General Information

• Status: Published
• Publication Date: 19-Jul-2015
• ICS: 73.060.10 - Iron ores
• Technical Committee: ISO/TC 102/SC 2 - Chemical analysis
• Drafting Committee: ISO/TC 102/SC 2 - Chemical analysis
• Current Stage: 9093 - International Standard confirmed
• Completion Date: 24-Jun-2022

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 11536
First edition
2015-08-01
Iron ores — Determination of loss on
ignition — Gravimetric method
Minerais de fer — Détermination de la perte au feu — Méthode
gravimétrique
Reference number
ISO 11536:2015(E)
©
ISO 2015

---------------------- Page: 1 ----------------------
ISO 11536:2015(E)

COPYRIGHT PROTECTED DOCUMENT
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2015 – All rights reserved

---------------------- Page: 2 ----------------------
ISO 11536:2015(E)

Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Principle . 1
4 Reagents . 1
5 Apparatus . 1
6 Sampling and samples — Laboratory sample . 2
7 Procedure. 2
7.1 General . 2
7.2 Number of determinations . 2
7.3 Determination of hygroscopic moisture content. 2
7.4 Test portion . 2
7.5 Determination . 3
8 Expression of results . 3
8.1 Calculation of loss on ignition . 3
8.2 General treatment of results . 3
8.2.1 Repeatability and permissible tolerances . 3
8.2.2 Determination of analytical result . 4
8.2.3 Between-laboratories precision . 4
8.2.4 Check for trueness . 4
8.2.5 Calculation of final result . 5
9 Test report . 5
Annex A (normative) Flowsheet of the procedure for the acceptance of analytical values for
test samples . 6
Bibliography . 7
© ISO 2015 – All rights reserved iii

---------------------- Page: 3 ----------------------
ISO 11536:2015(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 2, Chemical analysis.
iv © ISO 2015 – All rights reserved

---------------------- Page: 4 ----------------------
ISO 11536:2015(E)

Introduction
The measurement of loss on ignition (LOI) is a technique widely used in the iron ore industry. Ignition
loss is the sum of contributions from the mass loss of volatile compounds water vapour, carbon dioxide
and sulfides (due to the decomposition of goethite and carbonaceous materials), and the mass gain
due to oxidation [Fe(II) to Fe O ]. Its use is complementary to the determination of elemental or oxide
2 3
concentrations. It serves to allow for an addition of the oxides, generated at the ignition temperature,
and the LOI, to arrive at total (oxide + LOI). The determination of LOI is essential in sinter plant and
blast furnace balance calculations, as it is used to calculate calcinated elemental concentrations.
© ISO 2015 – All rights reserved v

---------------------- Page: 5 ----------------------
INTERNATIONAL STANDARD ISO 11536:2015(E)
Iron ores — Determination of loss on ignition —
Gravimetric method
WARNING — This International Standard may involve hazardous materials, operations and
equipment. This International Standard does not purport to address all of the safety problems
associated with its use. It is the responsibility of the user of this International Standard to
establish appropriate health and safety practices and determine the applicability of regulatory
limitations prior to use.
1 Scope
This International Standard specifies a gravimetric method for the determination of the loss in mass of
fully-oxidized iron ores, when ignited at 1 000 °C.
This method is applicable to a concentration range of 1,0 % (m/m) to 10,0 % (m/m) loss on ignition in
natural iron ores, iron ore concentrates and agglomerates.
The method is not applicable to the following:
a) Processed ores containing metallic iron (direct reduced iron);
b) Natural or processed ores in which the sulfur content is higher than 0,2 % (m/m);
c) Natural or processed ores in which the content of partially-oxidized iron is more than 1,0 % (m/m).
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its applic
...