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Glossary of Technical Terms

  • Ash – Incombustible impurities contained in coal which affect the burning characteristics of coal

  • Total moisture – The amount of moisture in coal, expressed as a percentage of the weight of the coal

  • Sulfur – A nonmetallic element that exists in several forms, it contained in coal which may vary from coal seam coal seam

  • Volatile matter – The amount of volatile matter in coal, expressed as a percentage of the weight of the coal

  • Calorific value – The heat of combustion of a unit quantity of coal

  • Kcal – Kilocalories (1,000 calories), a unit of energy