BS ISO 15585-2006 Hard coal - Determination of caking index《硬煤 粘结指数测定》.pdf

1、 g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58ICS 73.040Hard coal Determination of caking index BRITISH STANDARDBS ISO 15585:2006BS ISO 15585:200

2、6This British Standard was published under the authority of the Standards Policy and Strategy Committee on 3 February 2006 BSI 3 February 2006ISBN 0 580 47776 2The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the se

3、ction entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online.This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application.

4、Compliance with a British Standard does not of itself confer immunity from legal obligations.Summary of pagesThis document comprises a front cover, an inside front cover, the ISO title page, pages ii to iv, pages 1 to 11 and a back cover.The BSI copyright notice displayed in this document indicates

5、when the document was last issued.Amendments issued since publicationAmd. No. Date CommentsA list of organizations represented on this committee can be obtained on request to its secretary.Cross-referencesenquiries on the interpretation, or proposals for change, and keep UK interests informed; monit

6、or related international and European developments and promulgate them in the UK.National forewordThis British Standard reproduces verbatim ISO 15585:2006 and implements it as the UK national standard.The UK participation in its preparation was entrusted to Technical Committee PTI/16, Solid mineral

7、fuels, which has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any Reference numberISO 15585:2006(E)INTERNATIONAL STANDARD ISO15585First edition2006-01-15Hard coal Determination of caking index Houille Dtermination de lindice

8、 dagglutination BS ISO 15585:2006ii iiiContents Page Foreword iv 1 Scope . 1 2 Normative references . 1 3 Terms and definitions. 1 4 Principle. 1 5 Reagent 1 6 Apparatus 2 7 Coal sample. 7 8 Procedure 7 9 Calculation of result . 7 10 Supplementary test. 8 11 Precision 8 12 Test report . 8 Annex A (i

9、nformative) Extraction and preparation of standard anthracite for caking index determination 9 Annex B (informative) Quality test for standard anthracite used for caking index determination 10 BS ISO 15585:2006iv Foreword ISO (the International Organization for Standardization) is a worldwide federa

10、tion of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committ

11、ee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance

12、 with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires ap

13、proval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 15585 was prepared by Technical Comm

14、ittee ISO/TC 27, Solid mineral fuels, Subcommittee SC 5, Method of analysis. BS ISO 15585:20061Hard coal Determination of caking index 1 Scope This International Standard specifies a method of determination of caking index of hard coal. It is applicable to the evaluation of caking power of bituminou

15、s coal with random reflectance of vitrinite, Rr, greater than 0,6 % and less than or equal to 1,8 % ( 0,6 % u 1,8 %). 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated re

16、ferences, the latest edition of the referenced document (including any amendments) applies. ISO 562, Hard coal and coke Determination of volatile matter ISO 589, Hard coal Determination of total moisture ISO 1171, Solid mineral fuels Determination of ash 3 Terms and definitions 3.1 caking index meas

17、ure of the magnitude of the binding strength between coal particles or between coal particles and inert particles after coal is heated at 850 C. 4 Principle A portion of prepared sample of coal of limited size range and the standard anthracite are mixed under defined conditions, and the mixture is c

18、arbonized rapidly. The crucible coke thus obtained is tested for strength in a drum conforming to certain specifications. The caking power of the test sample is expressed by the abrasive strength, i.e. resistance to breakage of the crucible coke. 5 Reagent 5.1 Standard anthracite, having a moisture

19、of less than 2,5 mass % air-dried basis, an ash of less than 4 mass % dry basis and a volatile matter of less than 8 mass % dry, ash free basis. The size limits are 0,1 mm to 0,2 mm, the undersize content of 0,1 mm should not be more than 6 mass % and the oversize content of 0,2 mm should not be mor

20、e than 4 mass %. NOTE Annexes A and B provide information on the extraction, preparation and testing of standard anthracite. BS ISO 15585:20062 6 Apparatus 6.1 Balance, capable of weighing to the nearest 0,01 g. 6.2 Crucible, porcelain, having the following dimensions (see Figure 1): a) external dia

21、meter at the top: 40 mm 1,5 mm; b) internal diameter at the base: 20 mm 1,5 mm; c) external height: 40 mm 1,5 mm; d) wall thickness: less than 2 mm. BS ISO 15585:20063Dimensions in millimetres Figure 1 Crucible and lid 6.3 Lid, porcelain, 1,5 mm to 2,0 mm thick, with a hole 2 mm in diameter in the c

22、entre (see Figure 1). 6.4 Stirrer, made of 1,0 mm to 1,5 mm diameter metal wire, having an 8 mm loop at one end (see Figure 2). BS ISO 15585:20064 Dimensions in millimetres Figure 2 Stirrer 6.5 Heat resistant weight, composed for example of Nichrome 1)steel, with a mass of 110 g to 115 g (see Figure

23、 3). Dimensions in millimetres Figure 3 Steel weight 6.6 Press, for compressing the mixture of coal and standard anthracite under the weight of a 6 kg mass (see Figure 4). 1) Nichrome is an example of a suitable product available commercially. This information is given for the convenience of users o

24、f ISO 15585 and does not constitute an endorsement by ISO of this product. BS ISO 15585:20065Dimensions in millimetres Key 1 bottom plate 2 screw 3 round base 4 steel tube 5 connecting board 6 dead plate 7 back-up shaft 8 small shaft 9 dump 10 forelock 11 carriage 12 hand knob 13 press 14 lighting v

25、ertical shaft 15 plug Figure 4 Press used for compressing the mixture of anthracite and test coal BS ISO 15585:20066 6.7 Electric furnace, with a zone of uniform temperature and a temperature control device capable of maintaining that zone at 850 C 10 C. 6.8 Drum, with a cover, driving shaft, transm

26、ission gear and electric motor for carrying out the abrasion test on coke. The drum (see Figure 5) has a 200 mm internal diameter, is 70 mm deep and is made of 3 mm thick sheet iron. To the inside walls are welded two symmetrical sheet iron strips 70 mm long, 30 mm wide and 2 mm thick. To close the

27、drum, the cover is seated on a felt or rubber gasket and is secured by two wing-nuts. The drum is rotated with the stub axle horizontal at 50 2 rev/min. Dimensions in millimetres Figure 5 Drum used for test 6.9 Laboratory sieve, made of thin brass sheet or stainless steel sheet, with 1 mm round hole

28、s. 6.10 Stopwatch. 6.11 Brush. 6.12 Long handled tongs or rod, suitable for moving the weight. BS ISO 15585:200677 Coal sample 7.1 Crush the sample of air-dried coal to pass a 0,2 mm test sieve. Take care to avoid an excessive production of particles below 0,1 mm. It is essential that 20 mass % to 4

29、0 mass % of the total sample consists of particles between 0,1 mm and 0,2 mm. 7.2 The test sample shall be kept in a tightly closed container. The time between preparation of the sample and carrying out the test shall not exceed one week. 8 Procedure Carry out duplicate determinations on each sample

30、 of coal. These determinations shall not be carried out simultaneously, but for convenience the second crucible may be heated in the furnace at the same time as the first. Weigh a clean, dry crucible, place in it 1,00 g of the coal and 5,00 g of the standard anthracite (5.1), both weighed to an accu

31、racy of 0,01 g. Mix carefully for 2 min with the stirrer (6.4), level off the surface and place the steel weight on it. Press the whole for at least 30 s under the weight of a 6 kg mass. Remove the crucible from the press and cover it with the lid, leaving the steel weight in the crucible. Raise the

32、 temperature of the furnace to 850 C 10 C and insert the crucible. Check the temperature on the floor of the furnace at the side of the crucible and ensure that the temperature of 850 C 10 C is regained within 6 min from the insertion of the crucible. After a total heating time of 15 min, remove the

33、 crucible from the furnace and allow it to cool on a heat resistant plate for 45 min. After cooling, remove the weight from the crucible by using the tongs or rod (6.12). Brush back into the crucible any particles of coke adhering to the weight and weigh the crucible plus contents to an accuracy of

34、0,01 g. Transfer the contents of the crucible to the drum and fit the cover. Start the stopwatch and rotate the drum for 5 min at a speed of 50 2 rev/min. Remove the coke from the drum and sieve it through the 1 mm round hole sieve (6.9). Transfer the coke remaining on the sieve back to the crucible

35、 and reweigh. Return the coke from the crucible to the drum and repeat the abrasion procedure, sieving and reweighing of the oversize exactly as described above. Carry out a second abrasion test under the same conditions, sieve and weigh the final oversize. All weighings shall be made to an accuracy

36、 of 0,01 g. 9 Calculation of result The caking index, G, is given by Equation (1): 1230 7010mmGm+=+ (1) where m is the total mass of crucible coke after carbonization, expressed in grams; m1is the mass of coke remaining on the sieve after the first drum test, expressed in grams; m2is the mass of cok

37、e remaining on the sieve after the second drum test, expressed in grams. Calculate the result of each determination to one decimal place. Report the result as the mean of duplicate determinations, to the nearest integer. If the duplicate results differ by more than the repeatability figure given in

38、Table 1, disregard the results and repeat the complete test. BS ISO 15585:20068 10 Supplementary test If the value of G obtained as above is less than 18, a further test should be carried out with the ratio of test sample to standard anthracite changed to 3:3, i.e. 3 g of test sample and 3 g of stan

39、dard anthracite. The remaining procedure is the same as that in Clause 8. Calculation of the result is as given in Equation (2): 1230 705mmGm+=(2) 11 Precision Table 1 Precision Maximum acceptable difference between results Caking index Same laboratory (Repeatability) Different laboratory (Reproduci

40、bility) W 18 3 4 18 1 2 11.1 Repeatability limit The results of duplicate determinations, carried out at different times, in the same laboratory by the same operator with the same apparatus on the same analysis sample, should not differ by more than the above values in Table 1. 11.2 Reproducibility

41、critical difference The means of the results of duplicate determinations, carried out in each of two laboratories on representative portions taken from the same sample after last stage of sample preparation, should not differ by more than the above values in Table 1. 12 Test report The test report s

42、hall include the following particulars: a) sample identification; b) reference to the method used; c) results, consisting of the arithmetic mean of duplicate determinations, expressed as a whole number. BS ISO 15585:20069Annex A (informative) Extraction and preparation of standard anthracite for cak

43、ing index determination A.1 Source of standard anthracite Two definite seams of the Ruqigou mine, China, are designated for the extraction of the raw coal for preparing the standard anthracite. Any anthracite that conforms to the specifications given in 5.1 and meets the requirements of Annex B may

44、be used for the preparation of the standard anthracite. A.2 Preparation of standard anthracite A detailed procedure should be followed for the preparation of the standard anthracite (including picking out any dirt band and shale and other contaminants from the raw coal, drying, crushing with a speci

45、fied crusher, and sieving with a specific sieve). A.3 Quality checks and verification A regular examination of the prepared standard anthracite should be followed for checking the moisture, ash and volatile matter content in accordance with ISO 589, ISO 1171 and ISO 562, respectively; the size analy

46、sis; the content of undersize and the comparison with the reference anthracite by performing a caking index determination of appropriate bituminous coal samples. Any standard anthracite that is commercially available should be marked with the limits of ash, volatile matter and undersize content and

47、the lot number and the verification certificate should be attached. BS ISO 15585:200610 Annex B (informative) Quality test for standard anthracite used for caking index determination B.1 Reference anthracite sample Any reference anthracite sample should be renewed every three years. B.1.1 Method of

48、preparation Four samples are extracted and prepared in accordance with Annex A . Each sample should have a mass of 4 kg and each sample should be divided into two equal portions, one of which is used for the test and the other should be preserved by the preparing laboratory. B.1.2 Analysis of test s

49、amples The following should be determined on the test samples: a) Caking index, G, of appropriate bituminous coals; b) Moisture, ash and volatile matter, in accordance with the specifications in 5.1; c) Size limits, in accordance with the specifications in 5.1. B.1.3 Scheme of test Each standard anthracite sample is tested with eight bituminous coals (with values of G ranging from 20 to 90 spaced at intervals of approximately 10) by performing the determination of the caking index, G. The deter