ISO INTERNATIONAL STANDARD 924 Second edition 1989-12-01 Coal preparation plant - Principles and conventions for flowsheets Ateliers de preparation du charbon - Principes et conventions relatifs aux schemas de traitement Reference number ISO 924 : 1989 (E) No reproduction or networking permitted without icense from IHS Not for Resale ISO924:1989 (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, govern- mental 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. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by thei Iso Council. They are approved in accordance with IsO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 924 was prepared by Technical Committee iSO/TC 27, Solidmineralfuels. This second edition cancels and replaces the first edition (Is0 924 : 1975), of which it constitutes a technical revision. ISO 1989 All rights reserved. No part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from the publisher. International Organization for Standardization Case postale 56 . CH-1211 Geneve 20 . Switzerland Printed in Switzerland Copyright ! ermational Organization for Standardization No reproduction or networking permited without icense from IHS Not for Resale ISO924:1989(E) Introduction At various stages in the design of a complete plant, it is necessary to illustrate by flowsheets the process steps covering the operations to which the raw coal will be sub- jected in the preparation plant. In order that these may be more readily and universally understood, it is desirable that flowsheets should conform to a standard pattern and that various conventions should be well understood and adopted. CopyrightIntmationalOrganizatiforStandardzation by IHS No reproduction or networking permitted without license from IHS Not for Resale