Coal is a solid fossil hydrocarbon that represents the storage of solar energy from the past in the form of preserved plant material. The plants during the preservation process have been broken down into organic matter that comprises moisture, ash, volatile matter (gases and liquids given off on heating) and fixed carbon. The volatile matter and fixed carbon both contain energy and this is released on burning the coal.
Coal Rank Description
| Peat |
Wet plant material that has been subject to bacterial and fungal action, very low energy level, moisture level ~60% calorific value ~2,600 kcal/kg |
| Brown coal |
Peat that has had the water squeezed out, plant remains still visible moisture ~ 50%, calorific value 2,800 kcal/kg |
| Lignite |
Coal is hard and massive, black looking, moisture content 40-50%, calorific value about 4,000 kcal/kg |
| Sub-Bituminous |
Coal is hard and brittle and black and shiny, moisture content is 20 – 40%, calorific value 4,000 kcal/kg to 5,800 kcal/kg |
| Bituminous |
Coal is softer and shiny, moisture content is 8 -20% calorific value is 5,800 to 8,000 kcal/kg, crucible swelling number from 2 – 9+ possible for coking coals, volatile matter from 16% - 40% |
| Anthracite |
Coal is very shiny, repels moisture, calorific value 7,800 – 8,000 kcal/kg, no coking properties |
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Quick Details
| Place of Origin |
Indonesia |
| Brand Name |
KemCOAL® |
| Type |
High Calories |
| Raw Material |
Coal |
| Shape |
Lump |
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Descriptions
| KemCOAL® High Calories is coals that has contents and specifications in high calories range (>5800 kcal/kg) to fullfill custommers' needs. |
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Specifications
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Item Typical TOTAL MOISTURE (TM) ≤20% ASH CONTENT ≤10% VOLATILE MATTER (VM) <43% SUPLHUR ≤0.8% GROSS CALORIE VALUE (ARB) >5,800 Kcal/Kg HGI 40-60 Approx. SIZE 0-50 mm ≥90%
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