ASTM_D_5003_-_06a_2011.pdf

Designation:D500306a(Reapproved 2011)Standard Test Method forHardgrove Grindability Index(HGI)of Petroleum Coke1This standard is issued under the fixed designation D5003;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.INTRODUCTIONIntroduction of petroleum coke into the coal market in recent years has necessitated the use of manyof the test methods for coal so like data would be available for comparison and blending purposes.TestMethod D409 does not cover petroleum coke in its scope and its statements of precision and bias donot include petroleum coke.This test method provides the procedures and precision and bias data forthe hardgrove grindability index(HGI)of petroleum coke.Use of this test method or Test MethodD409 produces the same value for the sample of petroleum coke being analyzed.1.Scope1.1 This test method covers the determination of the hard-grove grindability index(HGI)of those petroleum cokes thatcontain no dedusting additive.The procedure for this testmethod is the same as in Test Method D409.Sections of thistest method contain the significance and use of the HGI ofpetroleum coke,preliminary sample preparation procedures,and procedure and precision and bias data specific to petroleumcoke.NOTE1The size consistency(particle size distribution)of fluidpetroleum coke is generally 100%passing a 6.73 mm(No.3)sieve andgreater than 80%passing a 2.00 mm(No.10)sieve.Much of fluid cokeswill pass a 0.59 mm(No.30)sieve.Because of this fineness the HGI valueis related to the coarser particles in fluid coke and large samples arerequired to prepare sufficient material of the correct particle size for TestMethod D409.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.2.1 ExceptionHardgrove grindability index is unitless.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:2D409 Test Method for Grindability of Coal by theHardgrove-Machine MethodD4930 Test Method for Dust Control Material on CalcinedPetroleum Coke3.Terminology3.1 Definitions:3.1.1 calcined petroleum coke,npetroleum coke that hasbeen thermally treated to drive off the volatile matter and todevelop crystalline structure.3.1.2 fluid coke,npetroleum coke with a granular,micro-scopic layered structure resulting from injection of petroleumfeedstock into a flowing,loose bed of coke particles.3.1.3 Hardgrove Grindability Index,HGI,unitless,ninpetroleum coke technology,measurement of the relative ease ofpulverizing a raw petroleum coke or green petroleum coke incomparison with coal standards.The higher the HGI value,theeasier the petroleum coke is to grind.3.1.4 petroleum coke,nsolid,carbonaceous residue pro-duced by thermal decomposition of heavy petroleum fractionsor cracked stocks,or both.3.1.5 raw petroleum coke,npetroleum coke that has notbeen calcined.1This test method is under the jurisdiction of ASTM Committee D02 onPetroleum Products and Lubricants and is the direct responsibility of SubcommitteeD02.05 on Properties of Fuels,Petroleum Coke and Carbon Material.Current edition approved May 1,2011.Published August 2011.Originallyapproved in 1989.Last previous edition approved in 2006 as D500306a.DOI:10.1520/D5003-06A.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 4.Summary of Test Method4.1 The sample of petroleum coke is reduced(crushed)toproduce a high yield of particles passing a 1.19 mm(No.16)sieve and retained on a 0.59 mm(No.30)sieve.These particlesare reduced in the hardgrove grindability machine according toTest Method D409.The quantity of particles retained on a0.074 mm(No.200)sieve is used to calculate the HGI of thesample.5.Significance and Use5.1 The HGI is used to predict the ranking of raw petroleumcokes or calcined petroleum cokes in industrial size mills usedfor crushing operations.The rankings are based on energyrequired and feed rate or both.5.2 The HGI is also used to select raw petroleum cokes andcoals that are compatible with each other when milled togetherin a blend so that segregation of the blend does not occurduring particle size reduction.6.Hazards6.1 Calcined petroleum coke is generally coated with adedusting agent to decrease the occurrence and the quant