ISO INTERNATIONAL STANDARD 20905 First edition 2004-07-15 Coal preparation Determination of dust/moisture relationship for coal Preparation du charbon Détermination de la relation particules/humidité du charbon Reference number ISO 20905:2004(E) @ ISO 2004 ISO 20905:2004(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In downloading this file, parties accept therein the responsibility of not infringing Adobe's licensing policy. The Iso Central Secretariat accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation ISO2004 All rights reserved. Unless otherwise specified, 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 either isO at the address below or IsO's member body in the country of the requester. ISO copyright office Case postale 56 : CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ ISO 2004-All rights reserved ISO20905:2004(E) Contents Page Foreword Introductior 1 Scope. 2 Normative references 3 Termsanddefinitions 4 Safety..... 5 Apparatus and equipment.. 6 Reagent. 7 Sample — Initial 8 Sample preparation Initial.. 8.1 Initial total moisture .. 8.2 Moisture adjustment. 6 Sample preparation Reagent.. 10 Dust determination . 10.1 Environment and equipment checks 10.2 Dust testing 11 Calculation 6 12 Report. 13 Precision Annex A (informative) Worked example. Annex B (informative) Worksheet example. izallon'ghts reserved ii IS0 20905:2004(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 technicalcommittees.Eachmemberbodyinterestedinasubjectforwhichatechnical committeehasbeen International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/lEc Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO 20905 was prepared by Technical Committee ISO/TC 27, Solid mineral fuels, Subcommittee SC 1, Coal preparation: Terminology and performance. @ Iso 2004 - All rights reserved ISO 20905:2004(E) Introduction The development of the dust/moisture curve provides an indication of the likely response of different coal types to drying or water addition during mining and handling processes. The dust/moisture curve provides a good basis for comparing the response of different coal types. Understanding the dust/moisture characteristics conservation at mines and other handling facilities, as well as minimizing the total moisture of the product. This International Standard describes a reliable measurement of dustiness of coal and extends to cover the relationship between dust and total moisture utilizing the Rio Tinto Dust Tumbler Test. This test provides a also suitable for the assessment of dust suppression chemicals. The Rio Tinto Dust Tumbler Test was developed using rotating equipment i