ISO INTERNATIONAL STANDARD 13930 Third edition 2015-08-01 Iron ores for blast furnace feedstocks Determination of low- temperature reduction-disintegration indices by dynamic method Minerais defer pour charges dehauts fourneauxDétermination des indices de désintégration par réduction a basse température, par méthode dynamique Reference number ISO 13930:2015(E) SO International Organization for Standardization @ IS0 2015 dardization 5956617 vided by IHS under ed without license from IHS IS0 13930:2015(E) COPYRIGHTPROTECTEDDOCUMENT IS02015,PublishedinSwitzerland 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 copyright@iso.org www.iso.org Intenationaibr Prganization for Standardization etworking permitted without license from IHS IS0 13930:2015(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions 4 Principle .1 5 Sampling, samplepreparation and preparation oftest portions 5.1 Sampling and sample preparation 1 5.2 Preparation of test portion. ..2 6 Apparatus .2 7 Test conditions .3 7.1 General .3 7.2 Reducing gas .3 7.2.1 Composition 3 7.2.2 Purity ..3 7.2.3 Flowrate 3 7.3 Heating and cooling gas .3 7.4 Temperature of the test portion .3 8 Procedure .4 8.1 Number of determinations for the test ..4 8.2 Reduction. 4 8.3 Sieving. .4 9 Expression of results 4 9.1 Calculation of the low-temperature disintegration indices (LTD+6,3, LTD-3,15 and LTD-0,5) 4 9.2 Repeatability and acceptance of test results. 5 10 Test report .5 11 Verification ..6 Annex A (normative) Flowsheet of the procedure for the acceptance of test results iii andardization 5956617 vided by IHS under thout license from IHS