ASTM D3038-1993(2018) Standard Test Method for Drop Shatter Test for Coke.pdf

1、Designation: D3038 93 (Reapproved 2018)Standard Test Method forDrop Shatter Test for Coke1This standard is issued under the fixed designation D3038; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revision. A numbe

2、r in parentheses indicates the year of last reapproval. Asuperscript epsilon () indicates an editorial change since the last revision or reapproval.1. Scope1.1 This test method covers the application of two proce-dures for the determination of the property of coke of with-standing breakage when drop

3、ped under specified test condi-tions.1.2 Procedure A, used when the coke sample contains 50 %or less of 100 mm (4 in.) after removal of coke smaller than 50mm (2 in.). Procedure A appears in Sections 69.1.3 Procedure B, used when the coke sample contains morethan 50 % 100 mm (4 in.) after removal of

4、 coke smaller than50 mm (2 in.). Procedure B appears in Sections 1013.1.4 The values stated in SI units are to be regarded asstandard. The values given in parentheses are for informationonly.1.5 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It

5、is theresponsibility of the user of this standard to establish appro-priate safety, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.6 This international standard was developed in accor-dance with internationally recognized principles on s

6、tandard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D121 Terminology of Coal and CokeD293 Test

7、 Method for the Sieve Analysis of CokeD346 Practice for Collection and Preparation of CokeSamples for Laboratory AnalysisD4621 Guide for Quality Management in an OrganizationThat Samples or Tests Coal and Coke (Withdrawn 2010)3E11 Specification for Woven Wire Test Sieve Cloth and TestSievesE323 Spec

8、ification for Perforated-Plate Sieves for TestingPurposes3. Significance and Use3.1 The values determined in this test, when evaluated interms of pertinent experience with other cokes, may be used asindications of the extent to which a given coke will break inconventional transit and handling beyond

9、 the point of sam-pling.4. Apparatus4.1 Shatter Apparatus, including (1) box, (2) base plate, (3)support frame, (4) containers, (5) sieves, and (6) weighingscales (see Fig. 1).4.1.1 Box, 455 mm (18 in.) in width, 710 mm (28 in.) inlength, and 380 mm (15 in.) in depth. The bottom of the boxshall cons

10、ist of two doors, hinged lengthwise and providedwith a trip latch for rapid opening. The doors are of 6-mm(14-in.) plate and are mounted on freely working hinges so thatthey swing open rapidly and do not impede the fall of the coke.The sides of the box are made of plate at least 3 mm (18 in.)thick.4

11、.1.2 Base PlateSteel plate, 1.22 m (48 in.) in length, 965mm (38 in.) in width, and not less than 13 mm (12 in.) thick.Vertical plates at least 200 mm (8 in.) high are placed on allfour sides to form a shallow box and to prevent loss of cokeduring the test. The back plate and side plates are rigidly

12、 fixedwhile the front plate is made removable to facilitate shovellingthe coke from the base plate into the box after each drop. It isimportant that the base plate be supported rigidly.NOTE 1Mounting the base plate solidly on concrete is satisfactory.4.1.3 Support FrameA support frame and other appr

13、opri-ate mechanism are provided so the box may be readily raisedand lowered to fixed or reproducible upper and lower positions.No part of the supporting frame is to impede the free fall ofcoke nor protrude into the 1.22 m by 0.965 m (48 in. by 38 in.)1This test method is under the jurisdiction of AS

14、TM Committee D05 on Coaland Coke and is the direct responsibility of Subcommittee D05.15 on MetallurgicalProperties of Coal and Coke.Current edition approved June 1, 2018. Published June 2018. Originallyapproved in 1972. Last previous edition approved in 2010 as D3038 93 (2010).DOI: 10.1520/D3038-93

15、R10.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is

16、 referenced onwww.astm.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles

17、for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1area of the base plate. When in the upper position, the insidesurface of the bottom of the box must be 1.83 m (6 ft) abovethe plate. The lower

18、 position shall be one convenient forloading and reloading the box without breakage of coke. Thebox may be constrained to only vertical movement by suitablelateral guides and may be conveniently supported by wire ropepassing over pulleys. Counterweighting will reduce labor.4.1.4 ContainersConvention

19、al galvanized-iron tubs areconvenient containers in which to collect and weigh coke in thevarious stages of the test.4.1.5 SievesWoven-wire square-mesh sieves of the fol-lowing sizes: 150 mm (6 in.), 125 mm (5 in.), 100 mm (4 in.),75 mm (3 in.), 50 mm (2 in.), 37.5 mm (112 in.), 25 mm (1 in.),and 12

20、.5 mm (12 in.). The sieves must conform to SpecificationE11.NOTE 2The 150 mm (6 in.) and the 125 mm (5 in.) sieves are notdefined in Specifications E11 but shall have nominal wire diameters of7.11 mm (0.2800 in.) and 6.73 mm (0.2650 in.), respectively, and havepermissible variations in average openi

21、ng, permissible variations for notmore than 5 % of openings, and maximum variation in individualopenings equivalent to that specified for the 100 mm (4 in.) sieve.NOTE 3For Procedure A, in which the coke samples do not containmore than 50 % plus 100 mm (4 in.) sizes, the 150 mm (6 in.), 125 mm(5 in.

22、), and 100 mm (4 in.) sieves may be excluded. For Procedure B, inwhich the coke samples contain more than 50 % plus 100 mm (4 in.) sizes,it is permissible to exclude the 37.5 mm (112 in.), 25 mm (1 in.), and the12.5 mm (12 in.) sieves.4.1.6 Weighing ScaleFor Procedure A, a scale having acapacity of

23、35 kg (75 lb) is to be provided and be graduated sothat it may be read directly, without interpolation, to 0.05 kg(0.1 lb). The sensitivity is to be not less than 0.025 kg (0.05 lb).4.1.6.1 For Procedure B, this scale is to have a capacity of60 kg (125 lb) graduated to 0.1 kg (0.2 lb) and have asens

24、itivity not less than 0.05 kg (0.10 lb).FIG. 1 Shatter Test MachineD3038 93 (2018)25. Sampling5.1 The gross sample of coke must be taken as close aspossible to the point of interest, include all sizes, and becollected in such a way as to be representative of the total lotor quantity in question, in

25、accordance with Practice D346.5.2 For Procedure A, the minimum size of the gross samplemust be such as to yield 68 to 75 kg (150 to 165 lb) of cokeretained on 50-mm (2-in.) sieve when processed according tothe procedure set forth in Section 7.5.2.1 For Procedure B, this sample must be such as to yie

26、ldat least 140 kg (300 lb) of coke retained on 75 mm (3 in.) sievewhen processed in accordance with the procedure set forth inSection 11.5.2.2 If experience shows that more than three tests areusually necessary, the quantity of gross sample will need to beincreased appropriately.5.3 The gross sample

27、 is to be assembled from incrementsregularly and systematically collected, so that the entire quan-tity of coke sampled will be represented proportionately in thegross sample, and with such frequency that a gross sample ofat least the minimum required amount is collected.5.4 Increments may be collec

28、ted from a stopped conveyorbelt or by interposing a collecting container into a movingstream while the coke is being loaded or unloaded or otherwisetransported. The increment collected from a stopped belt mustbe all the coke on the belt between parallel planes separated bya distance 2.5 times the no

29、minal top size of the coke. In thesame way, when collecting from a moving stream, the collect-ing container must be as wide as the stream, or be moveduniformly through its whole width and have a mouth opening2.5 times the nominal top size of the coke. The nominal topsize, for this method, is that ne

30、arest standard sieve for whichabout 5 % of the coke is oversize.5.5 Samples collected from the surface of coke in piles,bins, cars, ships, or barges, are in general unreliable because ofsize segregation and should not be used for determiningconformance to specifications unless the purchaser and thes

31、eller so agree. As it may be very difficult to collect arepresentative sample from coke exposed in bins and cars, caremust be taken to collect increments representing the entireexposed area, if sampling must be done in this manner. This isbest accomplished by dividing the exposed surface to besample

32、d into approximately equal areas and collecting anincrement from each area.PROCEDURE ACOKE SAMPLE CONTAINING50 % 100 mm (4 in.) OR LESS6. Summary of Method6.1 A test sample is prepared by removing and discardingthe coke smaller than 50 mm (2 in.) from a representative grosssample. The test sample, a

33、pproximately 23 to 25 kg (50 to 55lb) is dropped four times from a height of 1.83 m (6 ft) onto arigid steel plate. The shattered coke is sieved. The resistance tobreakage is judged from the cumulative percentages of cokethat remain, after the test, on sieves of various sizes.7. Preparation of Test

34、Samples7.1 The coke used for the shatter test is only that portionwhich is over 50 mm (2 in.) in size, but the distribution of sizesin the portion tested is to be in the same proportions as in theplus 50-mm (2-in.) part of the gross sample as found in apreliminary size analysis to which the whole of

35、 the grosssample is subjected.7.2 This preliminary size analysis is carried out, mainly, byhand placing, a process in which each piece of coke is handledand counted as undersize if it will, in some position andwithout forcing, pass through the sieve. Proceeding in this way,and taking care in all ope

36、rations to avoid breakage, separate thegross sample into the following fractions which are segregatedappropriately in tubs:Passing Retained on Percent_ 100 mm (4 in.) sieve _100 mm (4 in.) sieve 75 mm (3 in) sieve _75 mm (3 in.) sieve 50 mm (2 in.) sieve _50 mm (2 in.) sieve _7.3 Make appropriate we

37、ighings so that the percentage ofeach size in the portion of the original gross sample retained ona 50.8 mm (2 in.) sieve can be calculated.7.4 Reconstitute each sample for testing, 23 to 25 kg (50 to55 lb), from the segregated sizes above 50 mm (2 in.). Selectpieces at random from the total amount

38、of each size, thequantity of each size fraction taken being based on the data ofthe preliminary size analysis.7.5 If the coke contains 5 % of moisture or less, test thesample as is. Wetter coke is to be dried to 5 % or less beforetesting.8. Procedure8.1 Weigh 23 to 25 kg (50 to 55 lb) of the prepare

39、dreconstituted sample to the nearest 0.05 kg (0.1 lb). Transferthe coke carefully into the box of the shatter test apparatus byeither inserting the container into the box and allowing thecoke to slide out or by removing the coke and placing it into thebox by hand. Do not empty the container by tippi

40、ng out thecontents.8.2 Raise the box to the standard height and allow the coketo fall onto the base plate. Lower the box to the lower position,drop the front plate, and shovel the coke from the base plateinto the box, taking care to place the coke into the box withoutmuch dropping. Return the whole

41、of the coke over about 12.5mm (12 in.) in size from the base plate to the box; this can bedone using the shovel, without sweeping at this stage. Repeatthe process until four drops in all have been carried out. Someform of indicator is helpful for counting the number of drops toavoid error. Collect a

42、ll the shattered coke into a container,sweeping up all the fine material and determine the weight. Ifthe weight loss is more than 0.10 kg (0.2 lb), reject the test atthis stage.8.3 Carry out a sieve analysis on the shattered coke inaccordance with Test Method D293. The sieves to be used are75 mm (3

43、in.), 50 mm (2 in.), 37.5 mm (112 in.), 25 mm (1 in.),and 12.5 mm (12 in.).D3038 93 (2018)39. Report9.1 Report the results of each individual shatter test asfollows:Retained onPercentCumulative75 mm (3 in.) sieve _50 mm (2 in.) sieve _37.5mm(112 in.) sieve _25 mm (1 in.) sieve _12.5mm(12 in.) sieve

44、_9.1.1 In case the sum of the percentages does not total100.0, correct the quantity passing through the smallest sieveso that the total will be 100.0.9.2 Conduct three tests on each sample. If the range ofvalues of the 50 mm (2 in.) shatter index does not exceed 5.0units, average the three results a

45、nd report the arithmetic mean.If the range does exceed 5.0 units, make one or more furthertests until three values are obtained that do so agree. Aftercarrying out one extra test, thus making a total of four tests, itmay sometimes be found that either of two results can berejected by the above rule,

46、 one at a time, to leave twoalternative sets of three results that agree to within the statedlimits. In this case, none of the results are rejected and all fourshould be averaged in the calculation of the means.PROCEDURE BCOKE SAMPLE CONTAININGMORE THAN 50 % 100 mm (4 in.)10. Summary of Method10.1 A

47、 test sample is prepared by removing and discardingthe coke smaller than 75 mm (3 in.) from a representative grosssample. The test sample, approximately 40 to 45 kg (90 to 100lb) is dropped four times from a height of 1.83 m (6 ft) onto arigid steel plate. The shattered coke is sieved. The resistanc

48、e tobreakage is judged from the cumulative percentages of cokethat remain, after the test, on sieves of various sizes.11. Preparation of Test Samples11.1 The coke used for the shatter test is only that portionwhich is over 75 mm (3 in.) in size, but the distribution of sizesin the portion tested is

49、to be in the same proportions as in theplus 75 mm (3 in.) part of the gross sample as found in apreliminary size analysis to which the whole of the grosssample is subjected.11.2 This preliminary size analysis is carried out, mainly, byhand placing, a process in which each piece of coke is handledand counted as undersize if it will, in some position andwithout forcing, pass through the sieve. Proceeding in this way,and taking care in all operations to avoid br