Coal sizing grid

Details Coal sizing grid Coal sizing grid

B - Operations, Transporting

07

B

209/132

B07B 1/00 (2006.01) B07B 1/52 (2006.01)

Patent

CA 2031018

A self-cleaning sizing grid for a coal crusher has two parallel clearing combs made up of rigid steel fingers which rotate through the grid bars to clear jammed materials therefrom. The propeller-like fingers are preferably staggered in angular orientation on their respective shafts. The shafts are spaced so that the swept volumes of the fingers overlap. A surge detector senses drive motor current as an indication of stall or incipient stall and automatically reverses the direction of rotation of the clearing combs.

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