ASTM_D_410_-_84_scan.pdf

.:.1.,.,.,.,.Designation:D 410-84 4cni AMERICAN SOCIETY FOR TESTING AND MATERIALS Reprinted from the Annual Book of ASTM Standards,Copyright ASTM If not listed in the current combinad index,will appear in the next edition.1916 Race St.,Philadelphia,Pa.19103 Standard Method for SIEVE ANALYSIS OF COAL This standard is issued under the fixed designation D 410;the number immediately following the designation indicates the year of original adoption or,in the case of revision,the year of last&on.A number in parentheses indicates the year of l a s t reapproval.A SupersCriPt epsilon(e)indicates an editorial change sina the l a s t revkon or reapproval.1.scope 1.1 This method for sieve analysis is applica-ble to all coal except anthracite,powdered coal as used in boiler plants,and crushed coal as charged into coke ovens.1.2 The values stated in inch-pound units are to be regarded as the standard.1.3 This standard may involve hazardous ma-terials,operations,and equipment.This standard does not purport to address all o f rhe safety prob lems associated wifh its use.It is the responsibil-ity o f whoever uses this standard to consult and establish appropriate safety and health practices and determine the applicability o f regulatory limi-tations prior to use.2.Applicable Documents 2.1 ASTM Standards:D346 Method of Collection and Preparation of Coke Samples for Laboratory Analysis2 E 11 Specification for Wire-Cloth Sieves for Testing Purposes E 323 Specification for Perforated-Plate Sieves for Testing Purposes*3.Significance and Use 3.1 This method concerns the separation of coal into definite size fractions for purposes of characterizing the matenal for further processing or for commercial purposes.4.Apparatus conforming to Specifications E 11 or E 323.4.1 Sieves of the following series shall be used 4.1.1 Round-Hole Screens:&in.(.)i%-in.(37.5 mm)&in.(.)1V-h.(31.5-mm)5411.(125-mm)bin.(25.0-mm)+in.(i0-mm)%in.(19.0-mm)3-in.(75-mm)thin.(12.5-mm)2Hin.(63-mm)%-in.(9.5-mm)2-in.(50-mm)4.1.2 Wire-Cloth Sieves with Square pen-ings:4.75-mm(No.4)2.36-mm(No.8)1.18-mm(No.16)Wm(No.30)3Wpm(No.50)150-pm(No.100)75-pm(No.200)5.Time of Sampling 5.1 Sample coal when it is being loaded into or unloaded from railroad cars,ships,barges,or wagons,or when discharged from supply bins,or from industrial railway cars,or grab buckets,or from any coal-conveying equipment,as the case may be.It is not feasible to collect representative samples for screen analysis from the surface of coal in piles or from loaded cars or bins.6.Collection of Gross Sample 6.1 Collect increments regularly and system-atically,so that the entire quantity of coal sam-pled will be represented proportionately in the This method i s under the jurisdiction of ASTM Commitee D 5 on Coal and Coke and i s the direct responsibility of Sub committee W5.07 on Physical Characteristics of Coal.Current edition approved Sept.28,1984.Published Novem-ber 1984.Originally published as D 4 I O-35 T.Last previous editionD410-38(1976).Annual Book o f ASTM SIandardr,Vol 05.05.1 NOTICE:This standard has either been superseded and replaced by a new version or discontinued.Contact ASTM International(www.astm.org)for the latest information.900927b 0020253 TbT gross sample,and with such frequency that a gross sample of the required amount shall be collected.The number of increments collected shall be not less than 20.When the coal is passing over a conveyor or down a chute,increments the full width and thickness of the stream of coal shall be taken either by stopping the conveyor and removing all coal from a transverse section of it,or by momentarily inserting a suitable container into the stream.If it is impracticable to collect increments the full width and thickness of the coal stream,increments shall be systemi-cally collected from ail portions of the stream.7.Weight of Gross Sample shall conform to the following:7.1 The weight of the gross sample collected Run-of-mine coal Screened coal with upper limit larger than 4-in.(100-mm)round Coal smaller than 4-in.(10-rnm)round Coal smaller than 2-in.(50-mm)round Coal smaller than I-in.(25-rnrn)round Coal smaller than%in.(12.5-mm)round not less than 4000 Ib not less than 4000 Ib 1.300 kg)(1800 ks)not less than 2000 Ib(900 not less than loo0 Ib(450 not less than 500 Ib(215 not less than 100 Ib(45 kg)kg)kg)kg)8.Reduction of Gross Sample 8.1 Coal Larger than 1-in.(25-mm)Round-Screen without mixing or dividing.8.2 Coal Smaller than 1-in.Round-Divide in amount to not less than i25 lb(56.5 kg)by riffling or by arranging it in a long,flat pile and successively halving it or quartering it by the aitemate-shovel method as follows:Take succes-sive shovelfuls in passing around the pile(ad-vancing a distance equal to the width of the shovel for each shovelful),and retain alternate shovelfuls or every fourth shovelful for the sam-ple.8.3 Coal Smaller than%-in.(12.5-mm)Round-Divide to not less than 25 Ib(1 1.4 kg)by passing it through a riffle or equally accurate divid