无烟煤
无烟煤（anthracite、希臘語：，意为“类煤”，衍生于“木炭”的希腊语）[1]是一种坚硬、致密且高光泽的煤矿品种。在所有的煤品种中，變質作用的程度最高，具有高的熱含量和碳含量，以及最少的雜質。
| 變質岩 | |
 無煙煤炭 | |
| 成分 | |
|---|---|
| 碳, 92–98% |
无烟煤
参考文献
參考文獻
. 2 9th: 106. 1878.
資料來源:
- Bauerman, Hilary. . Chisholm, Hugh (编). 2 (11th ed.). 劍橋大學出版社: 105–106. 1911.
延伸閱讀
- Chandler, Alfred D. . Business History Review. 1972, 46 (2): 141–181.
- Hudson Coal Company. . New York. 1932: 425. — Useful overview of the industry in the 20th century; fair-minded with an operators perspective
主要來源
- Report of the United states coal commission.... (5 vol in 3; 1925) Official US government investigation. online vol 1-2
- Tryon, Frederick Gale, and Joseph Henry Willits, eds. What the Coal Commission Found: An Authoritative Summary by the Staff (1925).
- General policies committee of anthracite operators. The anthracite coal strike of 1922: A statement of its causes and underlying purposes (1923); Official statement by the operators. online 页面存档备份，存于
外部連結
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维基共享资源中相关的多媒体资源：无烟煤 |
- HD Video close up of what Anthracite looks like
- The Distribution of Pennsylvania Coals
- History of anthracite coal mining
- "A Jewel In the Crown of Old King Coal Eckley Miners' Village" by Tony Wesolowsky, Pennsylvania Heritage Magazine, Volume XXII, Number 1 – Winter 1996
- The Eastern Pennsylvania Coalition for Abandoned Mine Reclamation 页面存档备份，存于
- The Anthracite Heritage Museum. 页面存档备份，存于
- Pennsylvania's Northern Coal Field
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