ASSESSMENT OF THE COAL RESOURCES OF THE KYRGYZ REPUBLIC:
COAL CHARACTER AND DISTRIBUTION, GEOLOGY, MINING, AND IMPORTANCE TO THE NATION'S FUTURE
USGS Open File Report 97-137A (English)
TABLE a-6 - ESTIMATES FOR HEATING VALUE OF SMOKELESS, BRIQUETTED COAL
(Major Assumptions are Noted)
| ITEM | LIGNITE | BITUMINOUS |
| 1. Coal Analysis, wt. % | ||
| Moisture | 48.0 | 10.0 |
| Ash | 15.0 | 16.0 |
| Sulfur | 1.0 | 1.0 |
| Heating Value, KgCal/Kg | 1,900 | 6,000 |
| Heating Value. Btu/lb | 3,420 | 10,800 |
| 2. During coal preparation, high-pressure pneumatic grinding could reduce inherent moisture in lignite as much as 75%. No moisture reduction for bituminous coal. New analyses would be Component, wt. % | ||
| Moisture | 18.8 | 10.0 |
| Ash | 23.4 | 16.0 |
| Sulfur | 1.6 | 1.0 |
| Heating Value, KgCal/Kg | 2,969 | 6,000 |
| Heating Value. Btu/lb | 5,344 | 10,800 |
| 3. If, for sulfur suppression, lime is incorporated in the raw mix in a 2:1 Ca:S molar ratio, new analyses would be Component, wt. % | ||
| Moisture | 17.7 | 9.5 |
| Ash | 27.7 | 19.9 |
| Sulfur | 1.5 | 1.0 |
| Heating Value, KgCal/Kg | 2,801 | 5,725 |
| Heating Value. Btu/lb | 5,042 | 10,305 |
| 4. If, for smokeless combustion, 15% by weight of absorbent clay is added to the raw mix, final briquette analyses would be Component, wt. % Moisture | ||
| Moisture | 15.4 | 8.3 |
| Ash | 37.1 | 30.3 |
| Sulfur | 1.0 | 0.8 |
| Heating Value, KgCal/Kg | 2,436 | 4,978 |
| Heating Value. Btu/lb | 4,384 | 8,961 |
| Heating Value, KgCal/Tonne | 2,436,000 | 4,978,000 |
| Heating Value, Btu/ton | 8,768,000 | 17,922,000 |
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