BS-6127-4-1990 ISO-7404-4-1988.pdf
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1、BRITISH STANDARD BS 6127-4: 1990 ISO 7404-4: 1988 Petrographic analysis of bituminous coal and anthracite Part 4: Method of determining microlithotype, carbominerite and minerite composition UDC 552.574.08 + 552.573.08 + 552.574.1.087.22:620.186:681.723.22 Licensed Copy: sheffieldun sheffieldun, na,
2、 Wed Dec 06 14:54:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6127-4:1990 This British Standard, having been prepared under the direction of the Solid Mineral Fuels Standards Policy Committee, was published under the authority of the Board of BSI and comes into effect on 28 February 1990 BSI 09
3、-1999 The following BSI references relate to the work on this standard: Committee reference SFC/4 Draft for comment 85/55642 DC ISBN 0 580 17529 4 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Solid Mineral Fuels Standards Policy Commi
4、ttee (SFC/-) to Technical Committee SFC/4, upon which the following bodies were represented: British Coal Corporation British Gas plc British Steel Industry International Committee for Coal Petrography Natural Environment Research Council (Institute of Geological Science) Power Plant Contractors Ass
5、ociation Amendments issued since publication Amd. No.Date of issueComments Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:54:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6127-4:1990 BSI 09-1999i Contents Page Committees responsibleInside front cover National forewordii 0Introduction1
6、1Scope and field of application1 2References2 3Definitions2 4Principle2 5Material2 6Apparatus2 7Procedure3 8Expression of results4 9Precision5 10Test report6 Figure 1 Design of grid for microlithotype analysis2 Figure 2 Criteria used to determine the categories of accepted and rejected points7 Table
7、 1 Maximum permissible number of intersections falling on mineral matter for the point to be classified as a microlithotype3 Table 2 Delimitation of microlithotypes3 Table 3 Delimitation of carbominerite (excluding carbopolyminerite with sulfide) and minerite4 Table 4 Delimitation of carbopolymineri
8、te with sulfide4 Table 5 An example of a method of expressing the results5 Table 6 Nature of coal associated with carbominerite and minerite (example)5 Table 7 Theoretical standard deviation and repeatability of the percentage of a component based on 500 point counts5 Publications referred toInside
9、back cover Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:54:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6127-4:1990 ii BSI 09-1999 National foreword This Part of BS 6127 has been prepared under the direction of the Solid Mineral Fuels Standards Policy Committee. It is identical with
10、 ISO 7404-4:1988 “Methods for the petrographic analysis of bituminous coal and anthracite Part 4: Method of determining microlithotype, carbominerite and minerite composition”, prepared by Technical Committee ISO/TC 27, Solid mineral fuels, of the International Organization for Standardization (ISO)
11、. 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 International Standard
12、Corresponding British Standard BS 6127 Petrographic analysis of bituminous coal and anthracite ISO 7404-1:1984Part 1:1981 Glossary of terms relating to the petrographic analysis of bituminous coal and anthracite (Technically equivalent) ISO 7404-2:1985Part 2:1982 Method of preparing coal samples for
13、 petrographic analysis (Technically equivalent) ISO 7404-3:1984Part 3:1981 Method of determining maceral group composition of bituminous coal and anthracite (Technically equivalent) ISO 7404-5:1984Part 5:1981 Method of determining microscopically the reflectance of vitrinite (Technically equivalent)
14、 Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 8, 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 insi
15、de front cover. Licensed Copy: sheffieldun sheffieldun, na, Wed Dec 06 14:54:31 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 6127-4:1990 BSI 09-19991 0 Introduction 0.1 Petrographic analyses have been recognized internationally as important in the context of the genesis, vertical and lateral variat
16、ion, continuity, metamorphism and usage of coal. The International Committee for Coal 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 I
17、nternational Standard 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
18、 compositions and the distribution of mineral matter 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 tech
19、nological properties of the blend. This International Standard 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 pa
20、rts, as follows: Part 1: Glossary of terms; 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 vitrin
21、ite. For information on the nomenclature and analysis of brown coals and lignites, reference should be made to the International Handbook of Coal Petrography published by the ICCP1). 0.2 Microlithotypes are the naturally occurring associations of macerals which characterize the visibly different typ
22、es of coal. By convention, the identity of a microlithotype is determined by the maceral group or groups occurring within an area of at least 50 4m 50 4m and which are present in amounts equal to or exceeding 5 % by volume. Hence they can comprise a single maceral or maceral group if it exceeds thes
23、e dimensions. Microlithotypes may include up to 20 % by volume of minerals such as clay, quartz and carbonates or up to 5 % by volume of sulfide minerals. If the content of mineral matter exceeds these amounts, the material is designated as minerite or carbominerite depending on the proportions of c
24、oal and mineral matter. Carbominerites can be subdivided according to the type of mineral matter. Microlithotypes contribute information on the genesis of coal seams and can assist in solving problems of seam correlation. Because they determine, together with rank and mineral matter, the hardness an
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