ISO INTERNATIONAL STANDARD 6153 First edition 1989-09-01 Chromium ores -- Increment sampling Minerais de chrome -Echantillonnage par prelevements Referencenumber ISO6153: 1989 (E) No reproduction or networking permited without license from IHS Not for Resale ISO 6153:1989 (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 normaliy 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 the ISo Council, They are approved in accordance with ISO procedures requiring at least 75 % approval by the member bodies voting. International StandardISO6153was prepared byTechnical CommitteeISO/TC 65, Manganese and chromium ores. Annex A forms.an integral part of this International Standard. ISO1989 All rights reserved. No part of this publication may be reproduced or utlized 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 CopyightintemationaOrganizatonforstandardization'-1211 Geneve 20Switzerland No reproduction or networking permited without license from IHS Not fr Resale INTERNATIONALSTANDARD ISO6153:1989(E) Chromium ores - Increment sampling 1Scope Iso 8542 : 1986, Manganese and chromium ores - Ex- perimental methods for evaluation of quality variation and This International Standard specifies the methods for taking methods for checking the precision of sampling. samples of chromium ores to be used at the places of dispatch and acceptanceof oresfordeterminingthechemical compo- sition and moisture content of a consignment. 3Definitions The methods are applicable to both the manual and mechanical sampling of alf chromium ores, whether natural or processed. For the purposes of this International Standard, the following definitions apply Details of the hammer and shovel method for sampling ores containing lumps of + 100 mm in size are given in annex A. 3.1: lot : A definite quantity of an ore, processed or produced under conditions which are presumed uniform. Normative references 3.2 consignment : A quantity of an ore delivered at one time. The consignment may consist of one or more lots or parts The following standards contain provisions which, through of lots. referenceinthistext,constituteprovisionsofthisInternational Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to 3.3 increment : agreementsbased onthis International Standard are encour (1) A quantity of an ore taken by a sampling device at one agedtoinvestigatethepossibilityof applyingthemostrecent time from a consignment. editionsofthestandardslistedbelow.MembersofIECandISO maintain registers of currently valid International Standards. (2) A quantity taken by the increment division method. ISO 565 : 1983, Test sieves -- Woven metal wire cloth, per- forated plate and electroformed sheet -- Nominal sizes of 3.4 sub-sample : openings. (1) A quantity of an ore consisting of two or more increments Iso 6154 : 1989, Chromium ores - Preparation of samples. taken from a consignment. Is0 8541 : 1986, Manganese and chromium ores Ex (2) An aggregation of two or more increments each of which perimental methods for checking the bias of sampling and sam- has been optionally crushed and/or optionally