ASTM D7582-12
用宏观热重分析法对煤和焦炭作近似分析的标准试验方法

Standard Test Methods for Proximate Analysis of Coal and Coke by Macro Thermogravimetric Analysis

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标准号

ASTM D7582-12

发布

2012年

发布单位

美国材料与试验协会

替代标准

ASTM D7582-15

当前最新

ASTM D7582-24

 

 

适用范围

5. Significance and UseTop Bottom

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).

Note 1???The ash obtained differs in composition and amount from the mineral constituents present in the original coal. Combustion causes an expulsion of all water, the loss of carbon dioxide from carbonates, the conversion of iron pyrite into iron oxides and sulfur oxides, and other chemical reactions. Ash yield, as determined by this test method, can differ from the amount of ash produced in furnace operations or other combustion systems because combustion conditions influence the chemistry and amount of ash.

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.

5.6 Fixed carbon is ...........

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