ISO INTERNATIONAL STANDARD 11257 Fourth edition 2022-03 Iron ores for shaft direct-reduction feedstocks Determination of the low-temperature reduction- disintegration index and degree of metallization Minerais de fer pour charges utilisées dans les procedés par réduction directe - Determination de I'indice de desintegration par reduction a basse température et du degré de métallisation Reference number IS0 11257:2022(E) ISO @IS02022 IS0 11257:2022(E) COPYRIGHT PROTECTED DOCUMENT IS02022 All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may the internet or an intranet, withoutpriorwrittenpermission.Permission can be requested from eitherIso at the addressbelow or Iso's member body in the country of the requester. ISO copyright office CP 401 · Ch. de Blandonnet 8 CH-1214Vernier,Geneva Phone: +4122 749 0111 Email: [email protected] Website: www.iso.org PublishedinSwitzerland i @ IS0 2022 - All rights reserved