ISO INTERNATIONAL STANDARD 11536 First edition 2015-08-01 Iron ores Determination ofloss on ignition Gravimetric method Mineraisdefer-Determinationdelaperteaufeu-Méthode gravimétrique Reference number IS0 11536:2015(E) ISO @ ISO 2015 IS0 11536:2015(E) COPYRIGHTPROTECTEDDOCUMENT IS0 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. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org i @ IS0 2015 - All rights reserved IS0 11536:2015(E) Contents Page Foreword .iv Introduction ..V 1 Scope. ..1 2 Normative references 3 Principle 4 Reagents. ..1 5 Apparatus ..1 6 SamplingandsamplesLaboratorysample .2 7 Procedure .2 7.1 General .2 .2 7.2 Number of determinations 7.3 Determination of hygroscopic moisture content. .2 7.4 Test portion .2 7.5 Determination .3 Expression of results 33 8 8.1 Calculationof lossonignition 8.2 General treatment of results 3 8.2.1 Repeatabilityandpermissibletolerances .3 8.2.2 Determinationofanalytical result 4 8.2.3 Between-laboratoriesprecision .4 8.2.4 Check for trueness. 4 8.2.5 Calculation of final result .5 9 Test report .5 Annex A (normative)Flowsheet oftheprocedurefor the acceptance of analyticalvaluesfor testsamples 6 Bibliography 7 IS02015-Allrights reserved ili IS0 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 throughIsOtechnicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnical 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 editorialrules of theIso/lEC Directives, Part2 (see www.iso.org/directives). Attention is drawn to thepossibility 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 anypatentrights identifiedduringthedevelopmentofthedocumentwillbeintheIntroductionand/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 Technica Barriers to Trade (TBT) see the following URL: Foreword -Supplementary information The committee responsible for this document is Iso/TC 1o2,Iron ore and direct reduced iron, Subcommittee SC 2, Chemical analysis. iv IS02015-All rights reserved IS0 11536:2015(E) Introduction The measurement of loss on ignition (Lol) is a technique widely used in the iron ore industry. Ignition loss isthesum ofcontributionsfromthemass loss of volatilecompoundswatervapour,carbon dioxide and sulfides (due to the decomposition of goethite and carbonaceous materials),and the mass gain due to oxidation [Fe(ll) to Fe2O3].