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1、BRITISH STANDARD BS 3552:1994 ISO 1213-1: 1993 Glossary of Coal preparation terms UDC 662.66:622.7:001.4 Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 03:21:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3552:1994 This British Standard, having been prepared under the direction of the Soli
2、d Mineral Fuels Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 March 1994 BSI 12-1999 First published October 1962 Second edition December 1982 Third edition March 1994 The following BSI references relate to the work on this standard:
3、 Committee reference SFC/5 Draft for comment 90/56552 DC ISBN 0 580 23001 5 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Solid Mineral Fuels Standards Policy Committee (SFC/-) to Technical Committee SFC/5, upon which the following bod
4、ies were represented: British Coal Corporation Coal Preparation Plant Association Low Temperature Coal Distillers Association of Great Britain Ltd. Minerals Engineering Society Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 03:21:28 GM
5、T+00:00 2006, Uncontrolled Copy, (c) BSI BS 3552:1994 BSI 12-1999i Contents Page Committees responsibleInside front cover National forewordii Introduction1 1Scope1 2Normative reference1 3General1 4Sizing3 5Cleaning5 6Separation of solids from water or air9 7Size reduction10 8Expression of results11
6、9Miscellaneous13 10Blending and homogenization terms13 11Automatic control terms14 Annex A (informative) Bibliography of International Standards defining terms for automatic control17 Alphabetical index18 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 03:2
7、1:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3552:1994 ii BSI 12-1999 National foreword This British Standard has been prepared under the direction of the Solid Mineral Fuels Standards Policy Committee and is identical with ISO 1213-1:1993 Solid mineral fuels Vocabulary Part 1: Terms relating
8、to coal preparation, published by the International Organization for Standardization (ISO) and in the preparation of which the United Kingdom played a full part. This British Standard is a revision of BS 3552:1982, which is withdrawn. In this revision of BS 3552 various terms and definitions have be
9、en clarified. Cross-reference When ISO 10753 has been published, it is intended to implement it as an identical (dual-numbered) British Standard. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct ap
10、plication. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, pages 1 to 20, an inside back cover and a back cover. This standard has been updated (see copyright
11、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 Nov 29 03:21:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3552:1994 BSI 12-19991 Introduction This part of ISO 1213 is a glossa
12、ry consisting of a systematic list of terms commonly employed in coal preparation. For terms relating to petrographic analysis, see ISO 7404-1:1984, Methods for the petrographic analysis of bituminous coal and anthracite Part 1: Glossary of terms. This part of ISO 1213 takes into account the distinc
13、tion between processes or operations and the methods or machines for carrying them out. Clause 3 is devoted primarily to coal properties and the principal operations involved in coal preparation, and also includes general terms such as those relating to capacities and flowsheets. Clauses 4 to 7 cove
14、r the detailed terminology relating to sizing, cleaning, separation of solids from water or air, and size reduction. Clause 8 deals with the terms involved in interpreting or expressing the results of coal preparation operations. Clause 9 includes some miscellaneous terms. Clause 10 covers terms rel
15、ated to blending and homogenization. Clause 11 covers terms related to automatic control. Of necessity, it covers only a limited selection of terms. A list of other International Standards, which together provide a more comprehensive set of terms, is given in Annex A. Most of the clauses are subdivi
16、ded, and in each case the first subclause includes general terms and the remaining subclauses cover groups of related terms. As far as possible, this logical principle has been carried through into the arrangement of the terms themselves, which are also numbered for ease of reference. An alphabetica
17、l index is also provided, with a numerical cross-reference. 1 Scope This part of ISO 1213 defines terms commonly employed in coal preparation 2 Normative reference The following standard contains provisions which, through reference in this text, constitute provisions of this part of ISO 1213. At the
18、 time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements based on this part of ISO 1213 are encouraged to investigate the possibility of applying the most recent edition of the standard indicated below. Members of IEC and ISO maintain re
19、gisters of currently valid International Standards. ISO 10753:, Coal preparation plant Assessment of the liability to breakdown in water of materials associated with coal seams1). 3 General 3.1 General coal preparation terms 3.1.01 coal preparation: Collectively, physical and mechanical processes ap
20、plied to coal to make it suitable for a particular use. 3.1.02 run of mine; r.o.m. coal: Coal produced by mining operations, before screening, crushing or preparation. 3.1.03 raw coal: Coal that has received no preparation other than possibly screening or crushing. 3.1.04 raw coal feed: Raw coal sup
21、plied to a plant or machine, in which it undergoes some form of preparation. 3.1.05 coal cleaning: The treatment of raw coal to lower the quantity of undesirable constituents, through the difference in either density or surface properties 3.1.06 cleaned coal; clean coal: Coal produced by a cleaning
22、process (wet or dry). 3.1.07 middlings: A product of coal preparation that, because of its ash percentage, is intermediate between coal and discard. NOTE 1It follows therefore that the relative density of middlings is intermediate between those of coal and discard. Middlings may be reprocessed. 3.1.
23、08 true middlings; bone: Middlings so nearly homogeneous that their quality cannot readily be improved by crushing and recleaning. 3.1.09 false middlings; interbanded middlings: Middlings in which the particles consist of bands of coal and shale, and from which the coal may be liberated by crushing.
24、 3.1.10 reject; refuse: The material extracted from the feed during cleaning, for retreatment or discard. 1) To be published. Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 03:21:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3552:1994 2 BSI 12-1999 3.1.11 discard; dirt; stone: The materia
25、l extracted from the raw coal and finally discarded. 3.1.12 recirculation: The operation in which the whole or part of a product from a process is returned to the feed to a process, e.g. the return of the crushed overflow from a screen to the screen feed for rescreening. 3.1.13 “foreign coal”: Coal
26、received at a preparation plant from a source other than that to which the plant is attached. 3.1.14 imported coal: Coal coming from a foreign country, or other state within the country. 3.1.15 low-grade coal: Combustible material that has only limited uses owing to undesirable characteristics (e.g.
27、 ash percentage or size). 3.1.16 segregation: Partial separation of a material into its constituents, occurring as a result of differences in particle characteristics such as particle size or relative density. 3.2 Cleaning characteristics 3.2.01 washability: The amenability of a coal to improvement
28、in quality by cleaning, generally through its relative density/ash relationship. 3.2.02 float-and-sink analysis: The division of a sample into relative density fractions having defined limits, the amounts of the fractions being expressed as percentages of the total sample, commonly with an indicatio
29、n of the ash percentage (and other characteristics, if required) of each fraction. 3.2.03 washability curve: Any curve obtained from the results of a float-and-sink analysis permitting the theoretical yield of floats or sinks to be read off. NOTE 2The following are the five main types of washability
30、 curves: the characteristic ash curve; the cumulative floats curve; the cumulative sinks curve; the densimetric (relative density) curve; the near-density curve. 3.2.04 characteristic ash curve: The curve obtained from the results of a float-and-sink analysis showing, for any mass percentage of floa
31、ts (or sinks) the ash percentage of the highest density (or lowest density) fraction passing into these floats (or sinks), the mass percentage being plotted on the ordinate (vertical axis) and the ash percentage on the abscissa (horizontal axis). 3.2.05 cumulative curve: Any curve expressing the res
32、ults of combining successive relative density fractions or size fractions. 3.2.06 cumulative floats curve: The curve obtained from the results of a float-and-sink analysis by plotting the cumulative mass percentage of floats at each relative density against the cumulative ash of the total floats at
33、that density. 3.2.07 cumulative sinks curve: The curve obtained from the results of a float-and-sink analysis by plotting the cumulative mass percentage of sinks at each relative density against the cumulative ash of the total sinks at that density. 3.2.08 densimetric curve; relative density curve:
34、The curve obtained from the results of a float-and-sink analysis by plotting the cumulative mass percentage of floats or sinks against the relative density. 3.2.09 near-density curve; difficulty curve: The curve obtained from the results of a float-and-sink analysis, or from the densimetric curve, b
35、y plotting the mass percentage within the limits 0,1 of a given relative density against that relative density. 3.2.10 performance curve: Any curve used to show the relationship between properties of coal and results of a specific treatment. 3.2.11 actual performance curve: A performance curve showi
36、ng the results actually obtained from a coal preparation treatment. 3.2.12 expected performance curve: A performance curve showing the expected results of a coal preparation treatment. 3.2.13 M-curve; Mayer curve: A vectorial curve, obtained by plotting the cumulative ash percentages against their c
37、umulative yields, used to express the washability of a coal, plotted on a vectorial diagram in which the projection of the vector on the ordinate (vertical axis) represents the percentage of the product (coal) and the direction of the vector represents the percentage of a particular constituent of t
38、he product. 3.2.14 ash/relative density curve: The curve obtained from the float-and-sink analysis by plotting the ash percentages of successive fractions against the mean relative density of the fraction. 3.3 Capacity and throughput 3.3.01 nominal capacity: A notional figure, expressed in mass per
39、hour, used in the title of a flowsheet and in the general description of a plant, applying to the plant as a whole and to the specific product under consideration. 3.3.02 operational capacities: Figures given on a flowsheet to indicate quantities per unit time passing various points in the plant, ta
40、king account of fluctuations in the rate of supply and composition (as to size and impurity content). Licensed Copy: sheffieldun sheffieldun, na, Wed Nov 29 03:21:28 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS 3552:1994 BSI 12-19993 3.3.03 design capacity: The rate of feed at which specific items
41、of plant must operate continuously and give the guaranteed results on a particular quality of feed. 3.3.04 peak design capacity: A rate of feed in excess of the design capacity that specific items of plant will accept for short periods without necessarily fulfilling the performance guarantees given
42、in respect of them. 3.3.05 mechanical maximum capacity: The highest rate of feed at which specific items of equipment, not subject to performance guarantees, will function on the type and quality of feed for which they are supplied. 3.3.06 feed: Material for treatment supplied to an appliance or pla
43、nt. 3.3.07 basic flowsheet: A schematic diagram representing the various preparation process stages in the treatment of the raw coal. 3.3.08 process flowsheet: A basic flowsheet indicating the main operational steps within the plant, the movement of the various materials between the steps and the fi
44、nal products obtained, and often also the average mass flow at various points in the plant. 3.3.09 equipment flowsheet: A diagram indicating, by standard symbols, the units of equipment used in the various operational steps carried out within a coal preparation plant. 3.3.10 materials flowsheet: A f
45、lowsheet principally concerned with solid materials. 3.3.11 liquids flowsheet: A flowsheet to indicate the flow of liquids throughout a series of operations. 3.3.12 weighted flowsheet; capacity flowsheet: A materials flowsheet used in the design of a plant, including statements of the mass flow per
46、hour at principal points in the plant. 4 Sizing 4.1 General 4.1.01 sizing: Division of a material into products between nominal size limits. 4.1.02 classification: The separation of particles according to their size, density and shape by control of their settling rate through a fluid medium. 4.1.03
47、size analysis: The process or the result of the division of a sample into size fractions, each within defined limits, the mass or number of particles in each fraction being expressed as percentages of the total sample. 4.1.04 sieve analysis: Size analysis in which the division is carried out by the
48、use of test sieves. 4.1.05 mean size: The weighted average particle size of any sample, batch or consignment of particulate material. NOTE 3Several bases for calculating mean size have been proposed, giving results that vary widely for the same size distribution.The method of calculation should, the
49、refore, always be stated whenever results are reported. 4.1.06 nominal size; limiting size: The limit or limits of particle size used to describe a product of a sizing operation. 4.1.07 oversize: Material in a product of size greater than the upper nominal size limit; may be expressed as a percentage of the product. 4.1.08 undersize: Material in a product of size smaller than the lower nominal size limit; may be expressed as a percentage of the product. 4.1.09 dust: Particles of solid material sufficiently fine to allow suspension in air. (See also 6.4.) 4.1.1