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Some coal is cleaned, sorted and crushed to different sizes at preparation plants before loading for delivery, while other coal is shipped raw. Coal is usually loaded and shipped by railroad or river barge. supply to electric utilities, steel plant, cement factories, and various industires.
Low rank coals, such as lignite and sub- bituminous coals are typically softer, friable materials with a dull, earthy appearance. They are characterised by high moisture levels and low carbon content, and therefore a low energy content.
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