ISO INTERNATIONAL STANDARD 6230 First edition 1989-11-01 Manganese ores - Determination of size distribution by sieving Minerais de manganese -- Determination de la distribution granulometrique par tamisage Reference number ISO 6230 : 1989 (E) No reproduction or networking permitted without license from IHS Not for Resale,04/21/200710:18:48MDT ISO 6230 :1989 (E) Contents Page Foreword. ili 1 Scope. Normative references . 3 Definitions 4 Principle .. 2 Apparatus 3 6 General principles of sieving 4 7 Derivation of size sample.. 6 8 Effect of moisture content .. 8 6 Procedure for drying and determination of moisture content .. 8 10 Determination of mass of charge and products 8 11 Choice of dry or wet sieving.. 8 12 Sieving time.... 8 13 Sieving procedures. 9 14 Expression of results. 9 AnnexA Example of suggested format for report of the determination of the size distribution of manganese ore.. 11 ISO1989 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. InternationalOrganizationforStandardization Case postale 56.CH-1211Geneve20.Switzerland Printed in Switzerland tion for Standardization Licensee=NASA Technical Standards 1/9972545001 No reproduction or networking permited without license from IHS Not for Resale, 04/21/2007 10:18:48 MDT ISO6230:1989(E) Foreword ISo(the International Organizationfor Standardization)is a worldwide federation of national standards bodies (iso memberbodies).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 al matters of electrotechnical standardization. DraftInternationalStandardsadoptedbythetechnical committeesarecirculatedto the member bodies for approval before their acceptance as International Standards by the ISo Council. They are approved in accordance with IsO procedures requiring at least 75 % approval by the member bodies voting. International Standard ISO 6230 was prepared by Technical Committee ISO/TC 65, Manganeseand chromiumores. AnnexAofthisInternationalStandardisforinformationonly. yghmationlOganizatiSandardizati 1/9972545001 ili No reproduction or networking permited without license from IHS Not for Resale, 04/21/2007 10:18:48 MD