BS-6127-3-1995 ISO-7404-3-1994.pdf
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1、BRITISH STANDARD BS 6127-3: 1995 ISO 7404-3: 1994 Petrographic analysis of bituminous coal and anthracite Part 3: Method of determining maceral group composition of bituminous coal and anthracite ICS 73.040.00 Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:54:50 GMT+00:00 2006, Uncontroll
2、ed Copy, (c) BSI BS 6127-3:1995 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 Apri
3、l 1995 The following BSI references relate to the work on this standard: Committee reference SFI/4 Draft for comment 90/53085 DC ISBN 0 580 23871 7 Committees responsible for this British Standard The preparation of this British Standard was entrusted to Technical Committee SFI/4, Coal petrography,
4、upon which the following bodies 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
5、 Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:54:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6127-3:1995 BSI 09-1999i Contents Page Committees responsibleInside front cover National forewordii Introduction1 1Scope1 2Normative references1 3Definitions2 4Principl
6、e2 5Material2 6Apparatus2 7Preparation of coal sample2 8Procedure2 9Expression of results4 10Precision4 11Test report5 Annex A (informative) Bibliography6 Figure 1 Normal and boundary cases between macerals or between maceral and mounting medium3 Table 1 Theoretical standard deviation and repeatabil
7、ity limit of the percentage of a component, based on counts of 500 points4 List of referencesInside back cover Descriptors: Minerals and ores, solid fuels, coal, bituminous coal, anthracite, petrography, analysis methods, determination of content, organic matter, mineral matter, microscopic analysis
8、. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:54:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6127-3:1995 ii BSI 09-1999 National foreword This British Standard has been prepared under the direction of Technical Committee SFI/4, and is identical with ISO 7404-3:1994 Methods for the
9、 petrographic analysis of bituminous coal and anthracite Part 3: Method of determining maceral group composition published by the International Organization for Standardization (ISO), in the preparation of which the United Kingdom played a full part. This British Standard is a revision of BS 6127-3:
10、1981 which is withdrawn. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Cross-references
11、 International StandardCorresponding British Standard BS 6127 Petrographic analysis of bituminous coal and anthracite ISO 7404-1:1994Part 1:1995 Glossary of terms relating to the petrographic analysis of bituminous coal and anthracite (Identical) ISO 7404-2:1985Part 2:1982 Method of preparing coal s
12、amples for maceral group petrographic analysis (Technically equivalent) ISO 7404-4:1988Part 4:1990 Method of determining microlithotype, carbominerite and minerite composition (Identical) ISO 7404-5:1994Part 5:1995 Method of determining microscopically the reflectance of vitrinite (Identical) Summar
13、y of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 6, 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 fron
14、t cover. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:54:50 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6127-3:1995 BSI 09-19991 Introduction Petrographic analyses have been recognized internationally as important in the context of the genesis, vertical and lateral variation, continui
15、ty, metamorphism and usage of coal. The International Committee for Coal and 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 pa
16、rt of ISO 7404 agrees substantially with the text of the handbook and incorporates 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 compos
17、itions and the distribution of minerals in the coal. The reflectance of vitrinite 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 pro
18、perties of the blend. ISO 7404 is concerned with the methods of petrographic 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: Vocabul
19、ary; Part 2: Method of preparing coal samples; Part 3: Method of determining 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 nomenclatur
20、e and analysis of brown coals and lignites, reference should be made to the International Handbook of Coal Petrography1 published by the ICCP. Macerals are microscopically recognizable organic constituents of coal, and can be grouped together into three maceral groups: vitrinite, liptinite and inert
21、inite. Maceral groups and their subdivisions are listed in ISO 7404-1. The properties of a given coal are determined by the proportions and associations of the macerals and minerals present and by the rank of the coal. The method of determining maceral group composition described in this part of ISO
22、 7404 applies only to determinations made in reflected white light. Further analysis by other techniques, such as fluorescence microscopy, can be used to assist in maceral identification. In addition to the macerals, it is possible to identify certain minerals in coal and these may either be determi
23、ned as separate categories or be ignored. As some of the minerals cannot be satisfactorily identified under the microscope, an estimate of the total mineral matter content may be obtained from the ash. 1 Scope This part of ISO 7404 specifies a method of determining the proportions of the maceral gro
24、ups (and the minerals if desired) in coals. It is concerned only with determinations made on polished particulate blocks using reflected white light. If needed, the proportions of the individual macerals may be determined by the same procedure. It is not concerned with the determination of the propo
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