ASTM_D_167_-_12a.pdf

Designation:D16712aStandard Test Method forApparent and True Specific Gravity and Porosity of LumpCoke1This standard is issued under the fixed designation D167;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number 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 determination of apparentspecific gravity(Sections 2 to 9)and true specific gravity(Sections 10 to 13)of lump coke larger than 25-mm(1-in.)sizeand calculating porosity(Section 14)from the specific gravitydata.1.2 The values given in SI units shall be regarded as thestandard.Inch-pound units shall be accepted on an equivalentbasis.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D121 Terminology of Coal and CokeD346 Practice for Collection and Preparation of CokeSamples for Laboratory Analysis3.Terminology3.1 For definitions of terms used in this test method,refer toD121 Terminology of Coal and Coke.4.Significance and Use4.1 Apparent and true specific gravity,as determined by thistest method,are influenced by the type of coals carbonized andtheoperatingandpreparationalconditionsofthatcarbonization,that is,charge bulk density,heating rate,andpulverization level.In turn,these properties directly influencethe performance in processes using coke.APPARENT SPECIFIC GRAVITY5.Apparatus5.1 The apparatus for the determination of the apparentspecific gravity of coke shall consist of the following:5.1.1 AnEllipticalorRectangularCross-SectionedContainer,approximately 560 mm(22 in.)in length,280 mm(11 in.)in width,and a minimum of 330 mm(13 in.)in height,provided with a spout consisting of a short 13-mm(12-in.)nipple extending horizontally from the container about 270 mm(1012in.)above the bottom.5.1.2 Wire Cage or Basket,of about 13-mm(12-in.)square-mesh screen wire cloth provided with a cover and two longhandles,suitable for holding the entire sample of coke and somade as to fit inside the container below the spout.5.1.3 Bucket or Other Vessel,11-L(3-gal),suitable forreceiving the displaced water.5.1.4 Pan,about 380 mm(15 in.)square and 76 mm(3 in.)in height or the equivalent for containing the coke during thedetermination of its weight.5.1.5 Balance,sensitive to 0.05 kg(0.1 lb).6.Sampling at Source6.1 When the porosity test is desired on run-of-oven coke,the sample shall be collected from the coke wharf.6.1.1 By-Product CokeAbout 23 kg(50 lb)of representa-tive pieces of coke shall be selected from the coke wharf foreach test.This is best accomplished by dividing the coke on thewharf into approximately equal areas and selecting an equalnumber of pieces from each area.Each piece of coke selectedshall be approximately equal in length to one half of the widthof the coke ovens,and shall show a“cauliflower”end producedat the walls of the ovens,and an“inner”end produced at thecenter of the ovens.7.Sampling at Delivery7.1 If the porosity test is desired on coke for furnace orcupola use,the sample shall be representative of the material inquestion and collected at the place of delivery.7.1.1 By-ProductThe sample is best collected as the cokeis delivered from the railroad cars into the bins.This can beaccomplished by securing a representative sample of 4.5 to 6.81This test method is under the jurisdiction of ASTM Committee D05 on Coaland Coke and is the direct responsibility of Subcommittee D05.15 on MetallurgicalProperties of Coal and Coke.Current edition approved May 15,2012.Published July 2012.Originallyapproved in 1923.Last previous edition approved in 2012 as D167 12.DOI:10.1520/D0167-12A.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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 kg(10 to 15 lb)capacity in the coke stream at regular intervalsduring the period of unloading.The sample collected shall belarge enough to give about 23 kg(50 lb)of coke pieces,noneof which would in any position pass through a 25-mm(1-in.)square-mesh sieve.NOTE1Since the cage or basket is of 13-mm(12-in.)square-meshscreen wire cloth,it is necessary to have pieces that will remain in the cagewhen it is removed from the water.7.1.2 Since it is very difficult to collect a representativesample from coke exposed in bins and cars,care shall be takento take pieces representing the entire exposed area,if samplingmust be done in this manner.It is best accompli