User:Milton Beychok/Sandbox: Difference between revisions
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|Anthracitic<br><br><br>||Metaanthracite<sup> (d)</sup><br>Anthracite<sup> (d)</sup><br>Semianthracite<sup> (d)</sup>|| align="center"|98<br>92<br>86||align="center"|<br>98<br>92||align="center"|<br>2<br>8||align="center"|2<br>8<br>14|| || | |Anthracitic<br><br><br>||Metaanthracite<sup> (d)</sup><br>Anthracite<sup> (d)</sup><br>Semianthracite<sup> (d)</sup>|| align="center"|98<br>92<br>86||align="center"|<br>98<br>92||align="center"|<br>2<br>8||align="center"|2<br>8<br>14|| || | ||
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|Bituminous<br><br><br><br><br><br>||Low-volatile bituminous<sup> (d)</sup><br>Medium-volatile bituminous<sup> (d)</sup><br>High-volatile A bituminous<br>High-volatile B bituminous<br>High-volatile C bituminous<br>High-volatile C bituminous||align="center" |78<br>69<br><br><br><br><br> ||align="center"|86<br>78<br>69<br><br><br><br>||align="center"|14<br>22<br>31<br><br><br><br>||align="center"|22<br>31<br><br><br><br><br>||align="center"|<br><br>14,000<br>13,000<br>11,500<br>10,500||align="center"| | |Bituminous<br><br><br><br><br><br>||Low-volatile bituminous<sup> (d)</sup><br>Medium-volatile bituminous<sup> (d)</sup><br>High-volatile A bituminous<br>High-volatile B bituminous<br>High-volatile C bituminous<sup> (e)</sup><br>High-volatile C bituminous<sup> (f)</sup>||align="center" |78<br>69<br><br><br><br><br> ||align="center"|86<br>78<br>69<br><br><br><br>||align="center"|14<br>22<br>31<br><br><br><br>||align="center"|22<br>31<br><br><br><br><br>||align="center"|<br><br>14,000<br>13,000<br>11,500<br>10,500||align="center"| | ||
<br><br><br>14,000<br>13,000<br>11,500 | <br><br><br>14,000<br>13,000<br>11,500 | ||
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(b) Percentage by weight on a dry and mineral matter free basis (mmf).<br> | (b) Percentage by weight on a dry and mineral matter free basis (mmf).<br> | ||
(c) [[Gross Heating Value]] on a moist and mineral matter free basis. Moist refers to the natural inherent water contained in<br>a coal but does not include visible water (if any) on the surface of the coal. Multiply Btu/lb by 0.002326 to convert to M[[Joule|J]]/[[Kilogram|kg]].<br> | (c) [[Gross Heating Value]] on a moist and mineral matter free basis. Moist refers to the natural inherent water contained in<br>a coal but does not include visible water (if any) on the surface of the coal. Multiply Btu/lb by 0.002326 to convert to M[[Joule|J]]/[[Kilogram|kg]].<br> | ||
(d) Coals containing 69 wt % or more fixed carbon on a dry mmf basis are ranked according to their fixed carbon content<br>regardless of their Gross Heating Value. | (d) Coals containing 69 wt % or more fixed carbon on a dry mmf basis are ranked according to their fixed carbon content<br>regardless of their Gross Heating Value.<br> | ||
(e) A high-volatile C bituminous coal that may be agglomerating or non-agglomerating.<ref name=Perry's><ref name=Glossary>{{cite book|authors=Klaus K.E. Neuendorf, James P. Mehl and Julia A. Jackson|title=Glossary of Geology|edition=5th Edition|publisher=American Geological Institute|year=2005|id=ISBN 0-922152-76-4}}</ref><br> | |||
(f) A high-volatile C bituminous coal that is an agglomerating coal, which means that it tends to become sticky and to ''cake''<br> when heated. The agglomerating character of a coal is determined by heating a sample to 950 °C under certain conditions.<br>If the residue is coherent and supports a weight of 500g without pulverizing, the coal is classified as being agglomerating. | |||
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Revision as of 00:32, 30 April 2009
Class or Rank |
Group |
Fixed Carbon (b) (wt % dry mmf) |
Volatile Matter (b) (wt % dry mmf) |
Gross Heating Value (c) (Btu/lb moist mmf) | |||
---|---|---|---|---|---|---|---|
Equal or greater than |
Less than |
Greater than |
Equal or less than |
Equal or greater than |
Less than | ||
Anthracitic |
Metaanthracite (d) Anthracite (d) Semianthracite (d) |
98 92 86 |
98 92 |
2 8 |
2 8 14 |
||
Bituminous |
Low-volatile bituminous (d) Medium-volatile bituminous (d) High-volatile A bituminous High-volatile B bituminous High-volatile C bituminous (e) High-volatile C bituminous (f) |
78 69 |
86 78 69 |
14 22 31 |
22 31 |
14,000 13,000 11,500 10,500 |
|
Subbituminous |
Subbituminous A Subbituminous B Subbituminous C |
10,500 9,500 8,300 |
11,500 10,500 9,500 | ||||
Lignite |
Lignite A Lignite B |
6,300 |
8,300 6,300 | ||||
(a) This classification does not include a few coals (referred to as unbanded coals) having unusual physical and chemical properties falling within the fixed carbon and heating value ranges of the high-volatile bituminous and subbituminous ranks. (b) Percentage by weight on a dry and mineral matter free basis (mmf). |