BS 3552-1994 Glossary of coal preparation terms《选煤术语词汇》.pdf

1、BRITISH STANDARD BS 3552:1994 ISO 1213-1: 1993 Glossary of Coal preparation terms UDC 662.66:622.7:001.4BS3552:1994 This British Standard, having been prepared under the directionof the Solid Mineral Fuels Standards Policy Committee, was published underthe authority of the Standards Board and comes

2、intoeffect 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: Committee reference SFC/5 Draft for comment 90/56552 DC ISBN 0 580 23001 5 Committees responsible for this Brit

3、ish 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 bodies were represented: British Coal Corporation Coal Preparation Plant Association Low Temperature Coal Distiller

4、s Association of Great Britain Ltd. Minerals Engineering Society Amendments issued since publication Amd. No. Date CommentsBS3552:1994 BSI 12-1999 i Contents Page Committees responsible Inside front cover National foreword ii Introduction 1 1 Scope 1 2 Normative reference 1 3 General 1 4 Sizing 3 5

5、Cleaning 5 6 Separation of solids from water or air 9 7 Size reduction 10 8 Expression of results 11 9 Miscellaneous 13 10 Blending and homogenization terms 13 11 Automatic control terms 14 Annex A (informative) Bibliography of International Standards definingtermsfor automatic control 17 Alphabetic

6、al index 18 List of references Inside back coverBS3552:1994 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 t

7、o 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 This British Standard is a revision ofBS3552:1982, which is withdrawn. In this revision ofBS 3552 various terms and definitions have been c

8、larified. 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 applic

9、ation. 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, pages1 to 20, an inside back cover and a back cover. This standard has been updated (see copyright date)

10、 and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.BS3552:1994 BSI 12-1999 1 Introduction This part of ISO 1213 is a glossary consisting of a systematic list of terms commonly employed in coal preparation. For terms relating to petrogra

11、phic analysis, seeISO7404-1:1984, Methods for the petrographic analysis of bituminous coal and anthracite Part1: Glossary of terms. This part of ISO 1213 takes into account the distinction between processes or operations and the methods or machines for carrying them out. Clause3 is devoted primarily

12、 to coal properties and the principal operations involved in coal preparation, and also includes general terms such as those relating to capacities and flowsheets. Clauses4 to7 cover the detailed terminology relating to sizing, cleaning, separation of solids from water or air, and size reduction. Cl

13、ause8 deals with the terms involved in interpreting or expressing the results of coal preparation operations. Clause9 includes some miscellaneous terms. Clause10 covers terms related to blending and homogenization. Clause11 covers terms related to automatic control. Of necessity, it covers only a li

14、mited selection of terms. A list of other International Standards, which together provide a more comprehensive set of terms, is given inAnnex A. Most of the clauses are subdivided, and in each case the first subclause includes general terms and the remaining subclauses cover groups of related terms.

15、 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 alphabetical index is also provided, with a numerical cross-reference. 1 Scope This part of ISO 1213 defines terms commonly employed in

16、 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 time of publication, the edition indicated was valid. All standards are subject to revision, and parties to agreements base

17、d 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 registers of currently valid International Standards. ISO 10753:, Coal preparation plant Assessment of the liability to breakd

18、own in water of materials associated with coal seams 1) . 3 General 3.1 General coal preparation terms 3.1.01 coal preparation: Collectively, physical and mechanical processes applied to coal to make it suitable for a particular use. 3.1.02 run of mine; r.o.m. coal: Coal produced by mining operation

19、s, 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 supplied to a plant or machine, in which it undergoes some form of preparation. 3.1.05 coal cleaning: The treatment of raw co

20、al 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 process (wet or dry). 3.1.07 middlings: A product of coal preparation that, because of its ash percentage, is intermediate

21、 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. 3.1.08 true middlings; bone: Middlings so nearly homogeneous that their quality cannot readily be improved by crushing and rec

22、leaning. 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. 3.1.10 reject; refuse: The material extracted from the feed during cleaning, for retreatment or discard. 1) To be publish

23、ed.BS3552:1994 2 BSI 12-1999 3.1.11 discard; dirt; stone: The material 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 sc

24、reen to the screen feed for rescreening. 3.1.13 “foreign coal”: Coal 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

25、that has only limited uses owing to undesirable characteristics (e.g. 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 characte

26、ristics 3.2.01 washability: The amenability of a coal to improvement 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 exp

27、ressed as percentages of the total sample, commonly with an indication 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

28、 read off. NOTE 2The following are the five main types of washability 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

29、of a float-and-sink analysis showing, for any mass percentage of floats (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 (ho

30、rizontal axis). 3.2.05 cumulative curve: Any curve expressing the results 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 eac

31、h relative density against the cumulative ash of the total floats at 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 sink

32、s at that density. 3.2.08 densimetric curve; relative density curve: 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 r

33、esults of a float-and-sink analysis, or from the densimetric curve, by plotting the mass percentage within the limits 0,1of 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 t

34、reatment. 3.2.11 actual performance curve: A performance curve showing 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,

35、 obtained by plotting the cumulative ash percentages against their cumulative 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 t

36、he vector represents the percentage of a particular constituent of the 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 throughpu

37、t 3.3.01 nominal capacity: A notional figure, expressed in mass per 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 indic

38、ate quantities per unit time passing various points in the plant, taking account of fluctuations in the rate of supply and composition (as to size and impurity content).BS3552:1994 BSI 12-1999 3 3.3.03 design capacity: The rate of feed at which specific items of plant must operate continuously and g

39、ive 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 in respect of them. 3.3.05 mechanical ma

40、ximum 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 plant. 3.3.07 basic flowsheet: A schematic

41、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 final products obtained, and often also th

42、e 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 flowsheet principally concerned with soli

43、d 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 hour at principal points in the plant. 4

44、 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 size analysis: The process or the result

45、 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 use of test sieves. 4.1.05 mean size: Th

46、e 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, therefore, always be stated whenever result

47、s 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: Mate

48、rial 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 also6.4.) 4.1.10 fines: Coal having a maximum particle size usually less than4mm, and havi

49、ng no lower limit. NOTE 4The upper limit may vary widely. To avoid confusion, the term should always be qualified by stating the nominal size. 4.1.11 smalls: Coal having a maximum particle size usually less than25mm, and having no lower limit. NOTE 5The upper limit may vary widely. To avoid confusion, the term should always be qualified by stating the nominal size. 4.2 Screening 4.2.01 screening: The separation of solid materials of different sizes, by causing part to remain on a surface provided with apertures through which the remainder passes. 4.2.02 screen