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- Energy statistics yearbook 2011
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Definitions
- Author: United Nations
- Main Title: Energy statistics yearbook 2011 , pp 15-29
- Publication Date: December 2014
- DOI: https://doi.org/10.18356/38f2a292-en-fr
- Language: English, French
Hard coal – Coal that has a high degree of coalification with a gross calorific value above 23,865 kJ/kg (5,700 kcal/kg) on an ash-free but moist basis, and a mean random reflectance of vitrinite of at least 0.6. Slurries, middlings and other low-grade coal products, which cannot be classified according to the type of coal from which they are obtained, are included under hard coal. There are two sub-categories of hard coal: (i) coking coal and (ii) other bituminous coal and anthracite (also known as steam coal). Coking coal is a hard coal with a quality that allows the production of coke suitable to support a blast furnace charge. Steam coal is coal used for steam raising and space heating purposes and includes all anthracite coals and bituminous coals not classified as coking coal.
© United Nations
ISBN (PDF):
9789210570978
Book DOI:
https://doi.org/10.18356/2769738b-en-fr
Related Subject(s):
Natural Resources Water and Energy
Sustainable Development Goals:
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