ISO INTERNATIONAL STANDARD 923 Third edition 2022-11 Coal Density separation equipment for coal Performance evaluation Charbon - Equipement de séparation par masse volumique pour le charbonEvaluation des performances Reference number IS0 923:2022(E) ISO ISO2022 IS0 923:2022(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 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 CP 401 · Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Email: copyright@iso.org Website: www.iso.org Published in Switzerland ii @ IS0 2022 - All rights reserved