ISO 589-2008 Hard coal - Determination of total moisture《硬煤 总水分的测定》.pdf
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1、 Reference number ISO 589:2008(E) ISO 2008INTERNATIONAL STANDARD ISO 589 Fourth edition 2008-11-01 Hard coal Determination of total moisture Houille Dtermination de lhumidit totale ISO 589:2008(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy
2、, 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 Adobes licensing policy. The ISO Central Se
3、cretariat 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 parameters were optimized for printing. Every care has been taken to
4、ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2008 All rights reserved. Unless otherwise specified, no part of this public
5、ation 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 ISOs member body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva
6、 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reservedISO 589:2008(E) ISO 2008 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1
7、 4 Principle. 2 5 Reagent 2 6 Apparatus 3 7 Sample . 3 8 Procedure 4 9 Precision 7 10 Test report . 8 Bibliography . 9 ISO 589:2008(E) iv ISO 2008 All rights reservedForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member b
8、odies). 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, governmental a
9、nd 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. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives
10、, 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 ca
11、sting 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 589 was prepared by Technical Committee ISO/TC 27, Solid mineral fuels, Subcommitte
12、e SC 5, Methods of analysis. This fourth edition cancels and replaces the third edition (ISO 589:2003), which has been technically revised. ISO 589:2008(E) ISO 2008 All rights reserved v Introduction Moisture is an important parameter in respect of coal quality. The moisture content of coal is not a
13、n absolute value and conditions for its determination have to be standardized. It is expected that the results given by the different methods specified here should be comparable within the limits of the tolerance quoted. It is always necessary that the determination of the total moisture content of
14、hard coals be considered in close connection with sampling. Therefore, this International Standard has been prepared in close relationship with the ISO standards for mechanical sampling ISO 13909 (all parts) and manual sampling ISO 18283. A major problem with the preparation of test samples for the
15、determination of moisture is the risk of bias due to inadvertent loss of moisture. This is dependent on the tightness of the sealing of sampling containers, the level of moisture content in the sample, the ambient conditions, the type of coal and the reduction and division procedures used. This is d
16、escribed in detail in ISO 13909-4 or ISO 18283. Depending on the mass, the nominal top size and the facilities available where samples are taken, it is possible to dry the sample directly after sampling (air-drying), then to reduce the particle size and prepare a test sample for determination of moi
17、sture in the air-dried sample. Alternatively, the whole sample may be transported to the laboratory and the total moisture determined. INTERNATIONAL STANDARD ISO 589:2008(E) ISO 2008 All rights reserved 1 Hard coal Determination of total moisture 1 Scope This International Standard describes two met
18、hods for determination of the total moisture content of hard coals, a two-stage method and a single-stage method. For either method there is a choice between drying in air and drying in a nitrogen atmosphere. Depending on the coal rank, there may be systematic differences between the results obtaine
19、d by drying in the different atmospheres on subsamples of the same sample. Drying in a nitrogen atmosphere is suitable for all hard coals, while drying in air is only suitable for hard coals not susceptible to oxidation. NOTE The term “not susceptible to oxidation” cannot be defined easily. Usually,
20、 high-rank coals such as anthracites are not oxidized under the conditions described in this International Standard. For all other types of coal, this has to be verified by experiments. 2 Normative references The following referenced documents are indispensable for the application of this document.
21、For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 1213-2, Solid mineral fuels Vocabulary Part 2: Terms relating to sampling, testing and analysis ISO 11722, Solid mineral fuels Hard Coal
22、 Determination of moisture in the general analysis test sample by drying in nitrogen ISO 13909-1, Hard coal and coke Mechanical sampling Part 1: General introduction ISO 13909-2, Hard coal and coke Mechanical sampling Part 2: Coal Sampling from moving streams ISO 13909-3, Hard coal and coke Mechanic
23、al sampling Part 3: Coal Sampling from stationary lots ISO 13909-4:2001, Hard coal and coke Mechanical sampling Part 4: Coal Preparation of test samples ISO 18283:2006, Hard coal and coke Manual sampling 3 Terms and definitions For the purposes of this document, the terms and definitions given in IS
24、O 1213-2 apply. ISO 589:2008(E) 2 ISO 2008 All rights reserved4 Principle 4.1 Method A Two-stage methods 4.1.1 Method A 1 Drying under nitrogen in second stage The sample is dried in air at ambient temperatures or at elevated temperatures not exceeding 40 C (first or free-moisture stage) and the los
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