BS-6127-5-1995 ISO-7404-5-1994.pdf
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1、BRITISH STANDARD BS 6127-5: 1995 ISO 7404-5: 1994 Petrographic analysis of bituminous coal and anthracite Part 5: Method of determining microscopically the reflectance of vitrinite Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:54:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6127-5:19
2、95 This British Standard, having been prepared under the direction of the Sector Board for Materials and Chemicals, was published under the authority of the Standards Board and comes into effect on 15 April 1995 BSI 09-1999 First published August 1981 Second edition April 1995 The following BSI refe
3、rences relate to the work on this standard: Committee reference SFI/4 Draft for comment 90/53086 DC ISBN 0 580 23873 3 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee SFI/4, Coal petrography, upon which the following bodi
4、es were represented: British Coal Corporation British Gas plc British Steel Industry Combustion Engineering Association International Committee for Coal and Organic Petrology Power Generation Contractors Association (PGCA) (BEAMA Ltd.) Amendments issued since publication Amd. No.DateComments License
5、d Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:54:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6127-5:1995 BSI 09-1999i Contents Page Committees responsibleInside front cover National forewordii Introduction1 1Scope1 2Normative references1 3Definitions2 4Principle2 5Materials2 6Apparatus3 7P
6、reparation of coal sample6 8Procedure6 9Expression of results8 10Precision9 11Test report11 Annex A (informative) Bibliography12 Figure 1 Optical parts of a typical reflectance measuring microscope4 Figure 2 Types of vertical illuminators5 Figure 3 Histogram plotted from the results given in Table 2
7、10 Table 1 Reflectance standards in common use2 Table 2 An example of a method of expressing the results9 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:54:38 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6127-5:1995 ii BSI 09-1999 National foreword Thi
8、s British Standard has been prepared under the direction of Technical Committee SFI/4, and is identical with ISO 7404-5:1994 Methods for the petrographic analysis of bituminous coal and anthracite Part 5: Method of determining microscopically the reflectance of vitrinite published by the Internation
9、al Organization for Standardization (ISO), in the preparation of which the United Kingdom played a full part. This British Standard is a revision of BS 6127-5:1981, which is withdrawn. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standar
10、ds are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references International Standard Corresponding British Standard BS 6127 Petrographic analysis of bituminous coal and anthracite ISO 7401-1:1994Part 1
11、:1995 Glossary of terms relating to the petrographic analysis of bituminous coal and anthracite (Identical) ISO 7404-2:1985Part 2:1982 Method of preparing coal samples for petrographic analysis (Technically equivalent) Summary of pages This document comprises a front cover, an inside front cover, pa
12、ges i and ii, pages 1 to 12, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:54:38 G
13、MT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6127-5:1995 BSI 09-19991 Introduction Petrographic analyses have been recognized internationally as important in the context of the genesis, vertical and lateral variation, continuity, metamorphism and usage of coal. The International Committee for Coal a
14、nd Organic Petrology (ICCP) has made recommendations concerning nomenclature and analytical methods and has published an extensive handbook describing in detail the characteristics of a wide range of coals. The text of this part of ISO 7404 agrees substantially with the text of the handbook and inco
15、rporates many useful comments made by members of the ICCP and by member bodies of ISO/TC 27, Solid mineral fuels. Petrographic analyses of a single coal provide information about the rank, the maceral and microlithotype compositions and the distribution of minerals in the coal. The reflectance of vi
16、trinite is a useful measure of coal rank and the distribution of the reflectance of vitrinite in a coal blend, together with a maceral group analysis, can provide information about some important chemical and technological properties of the blend. ISO 7404 is concerned with the methods of petrograph
17、ic analysis currently employed in characterizing bituminous coal and anthracite in the context of their technological use. it establishes a system for petrographic analysis and comprises five parts, as follows: Part 1: Vocabulary; Part 2: Method of preparing coal samples; Part 3: Method of determini
18、ng maceral group composition; Part 4: Method of determining microlithotype, carbominerite and minerite composition; Part 5: Method of determining microscopically the reflectance of vitrinite. For information on the nomenclature and analysis of brown coals and lignites, reference should be made to th
19、e International Handbook of Coal Petrography1 published by the ICCP. The properties of a given coal are determined by the proportions and associations of the macerals and minerals present (see ISO 7404-32) and by the rank of the coal. One property that normally can be used as an indicator of rank, i
20、ndependent of the petrographic composition, is the reflectance of the vitrinite of the coal which increases progressively with increasing degree of coalification. The reflectances of the submacerals of vitrinite differ even in a single coal seam and therefore the value of the reflectance obtained de
21、pends on the choice of the submacerals used for measurement. Reflectance measurements are made on one or more of the submacerals of vitrinite, and in reporting the results it is necessary to specify on which submacerals the measurements were made and in what proportion. Consequently, a vital step in
22、 the measurement of vitrinite reflectance is the identification of vitrinite and its various submacerals. For this purpose, ISO 7404-1 and the ICCP handbook should be consulted. The reflectance value obtained also depends on whether maximum or random reflectance measurements are made so that the typ
23、e of measurement has to be specified. All of these analysis procedures are applicable to single coal seams or to blends providing that enough measurements are made in compliance with an unbiased sampling procedure on a representative sample. 1 Scope This part of ISO 7404 specifies the method for det
24、ermining microscopically the maximum and random reflectance in oil of polished surfaces of the vitrinite component of coals. The method is applicable to either coals from single seams or coal blends covering the whole range of bituminous coal and anthracite. By itself, this method is unsuitable for
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