Coal preparation is the process of sizing and cleaning coal to meet market specifications by removing impurities such as rock, sulfur, etc. It may include crushing, screening, or mechanical cleaning.
Ref: 122762/2006-10-01

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Coal (Coal is formed from plant and animal matter that ...)
Process (Process means the preparation of a substance, ...)
Coal (Coal refers to a combustible black or brownish ...)
Rock (Rock is the source of natural material from which ...)
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