ASTM_D_3180_-_15.pdf

Designation:D318015Standard Practice forCalculating Coal and Coke Analyses from As-Determined toDifferent Bases1This standard is issued under the fixed designation D3180;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 practice lists formulas that allow analytical data tobe expressed in various bases in common use.Such bases are:as received,dry,equilibrium moisture,dry ash free,and others.1.2 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.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 this standard to establish appropriatesafety and health practices and determine the applicability ofregulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2D388 Classification of Coals by RankD1412 Test Method for Equilibrium Moisture of Coal at 96to 97 Percent Relative Humidity and 30CD2013 Practice for Preparing Coal Samples for AnalysisD3173 Test Method for Moisture in the Analysis Sample ofCoal and CokeD3174 Test Method for Ash in the Analysis Sample of Coaland Coke from CoalD3302 Test Method for Total Moisture in CoalD7582 Test Methods for Proximate Analysis of Coal andCoke by Macro Thermogravimetric AnalysisE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with Specifications3.Terminology3.1 Definitions:3.1.1 as-determined basisanalytical data obtained fromthe analysis sample of coal or coke after conditioning andpreparation to No.60(250-m)sieve in accordance withPractice D2013 and Test Method D3302.As-determined datarepresents the numerical values obtained at the particularmoisture level in the sample at the time of analysis.Thesevalues are normally converted,according to formulae con-tained herein,to conventional reporting bases.3.1.2 as-received basisanalytical data calculated to themoisture condition of the sample as it arrived at the laboratoryand before any processing or conditioning.If the sample hasbeen maintained in a sealed state so that there has been no gainor loss,the as-received basis is equivalent to the moisture basisas sampled.3.1.3 dry basisdata calculated to a theoretical base of nomoisture associated with the sample.The numerical value asestablished by Test Methods D3173 or D7582 is used forconverting the as-determined data to a dry basis.3.1.4 dry,ash-free basisdata calculated to a theoreticalbase of no moisture or ash associated with the sample.Numerical values as established by Test Methods D3173,D3174,or,D7582 are used for converting the as-determineddata to a moisture-and ash-free basis.3.1.5 equilibrium moisture basedata calculated to themoisture level established as the equilibrium moisture.Nu-merical values as established by Test Method D1412 are usedfor the calculation.4.Significance and Use4.1 The calculations of analytical data for the coal and coketest parameters listed in Section 6,assume the analysis samplehas been prepared according to Practice D2013 and TestMethod D3302.4.2 This practice provides formulas,to enable calculationsof data from the as-determined analysis sample to variousmoisture bases,in common use by the coal and coke industry.4.3 This practice provides guidance to enable calculationsof weight-average data from various lots or sublots,which,initially,are provided at different moisture bases.4.4 The principles given in this practice are applicable to thecalculation of cumulative data(e.g.,for trade purposes or forsieve analyses or washability analyses).1This practice is under the jurisdiction of ASTM Committee D05 on Coal andCoke and is the direct responsibility of D05.21 on Methods of Analysis.Current edition approved Jan.1,2015.Published January 2015.Originallyapproved in 1974.Last previous edition approved in 2012 as D3180 12.DOI:10.1520/D3180-15.2For 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 5.Applicable Parameters and Symbols Used5.1 The calculation procedures defined in 6.3.3 and 6.4.2 areapplicable to the following analysis parameters when ex-pressed as weight percent,g/g(trace elements)or Btu/lb(gross calorific value):AshCarbonCarbon dioxideChlorineCalorific value(gross)Fixed carbonMajor,minor and trace elementsNitrogenSulfurSulfur forms(namely,pyritic,sulfate,organic)Volatile matter5.2 The symbols used in this practice:A=ash;weight%M=moisture,weight%P=any analysis parameter listed in 5.1,weight%(ex-cept gro