Patent ID: 6820829
Filing Date: 2004-11-23
Classification: B02C,F23K

Abstract:
An apparatus for separating undesired material from coal comprising:an air swept pulverizer for breaking up coal into particles where the pulverizer is a hammer mill, bowl mill, roller mill, or ring/roller mill, the pulverizer includes a feed mechanism which introduces coal into the pulverizer, the pulverizer includes an air blower which introduces flowing air into the pulverizer, the pulverizer includes a removal mechanism which removes undesired material and coal which contains a large portion of undesired material from the pulverizer; a separation mechanism connected to the pulverizer for separating undesired material from coal at a feed rate of at least 100 pounds per hour, the separation mechanism includes a conveyor which carries undesired material and coal which contains a large portion of undesired material from the removal mechanism; a mechanism for returning coal from which a portion of the undesired material has been removed by the separation mechanism back to the pulverizer for additional grinding; and a mechanism for diversion of material removed from the pulverizer directly to refuse without going to the separation mechanism.