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Significance and Use
5.1 Moisture, as determined by this instrumental test method, is used for calculating other analytical results to a dry basis using procedures in Practice D3180.
5.2 Moisture can be used in conjunction with the air-dry moisture loss determined by Test Method D3302 to determine total moisture in coal. Total moisture is used for calculating other analytical results to an as-received basis using Practice D3180.
5.3 Ash yield is the residue remaining after heating the coal and coke samples (see Note 1).
5.4 Ash yield is used, (1) as a parameter for evaluating sampling procedures and coal cleaning processes, (2) in the ultimate analysis calculation of oxygen by difference using Practice D3176, (3) in calculations including material balance, reactivity and yields of products relevant to coal conversion processes such as gasification and liquefaction, (4) in calculations to estimate the loading on electrostatic precipitators and on the fly ash and bottom ash disposal systems as well as erosion rates on boiler systems.
5.5 Volatile matter yield, when determined as herein described, may be used to (1) indicate coke yield on carbonization, (2) provide the basis for purchasing and selling, or (3) establish combustion characteristics.
1.1 These instrumental test methods cover the determination of moisture, volatile matter, and ash, and the calculation of fixed carbon in the analysis of coal and coke samples prepared in accordance with Practice D2013 and Practice D346.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
D121 Terminology of Coal and Coke
D346 Practice for Collection and Preparation of Coke Samples for Laboratory Analysis
D2013 Practice for Preparing Coal Samples for Analysis
D3173 Test Method for Moisture in the Analysis Sample of Coal and Coke
D3174 Test Method for Ash in the Analysis Sample of Coal and Coke from Coal
D3175 Test Method for Volatile Matter in the Analysis Sample of Coal and Coke
D3176 Practice for Ultimate Analysis of Coal and Coke
D3180 Practice for Calculating Coal and Coke Analyses from As-Determined to Different Bases
D3302 Test Method for Total Moisture in Coal
D5016 Test Method for Total Sulfur in Coal and Coke Combustion Residues Using a High-Temperature Tube Furnace Combustion Method with Infrared Absorption
E691 Practice for Conducting an Interlaboratory Study to Determine the Precision of a Test Method
ICS Number Code 73.040 (Coals)
UNSPSC Code 15101601(Coal); 15101604(Coke)
ASTM D7582-12, Standard Test Methods for Proximate Analysis of Coal and Coke by Macro Thermogravimetric Analysis, ASTM International, West Conshohocken, PA, 2012, www.astm.orgBack to Top