Patent ID: 6786436
Filing Date: 2004-09-07
Classification: B02C

Abstract:
Installation for accelerating granular material and causing the accelerated material to collide and break, comprising:a shaft with an axis of rotation; a rotor rotatably supported on said shaft and rotatable about said axis of rotation, said rotor having at least one side perpendicular to said axis of rotation, an outer edge of said side being essentially coincident with an outer edge of said rotor; said rotor having a rotating central chamber area with an axis of revolution coincident with said axis of rotation; said rotor having a revolving body area located concentric with said central chamber area and with an axis of revolution coincident with said axis of rotation; a guide element carried on said side of said rotor and located within said revolving body area, said guide element having a guide surface with a revolving start edge and a revolving end edge, said guide surface extending from said revolving start edge towards said outer edge of said rotor, said revolving start edge defining a first revolving surface of said central chamber area, said revolving end edge defining a second revolving surface of said revolving body area; a metering region located within a sector of said central chamber area, said sector being between two first radial planes originating from said axis of rotation and defining a first mid-point angle not greater than 180Â°, said sector terminating with an arc coincident with said first revolving surface, said arc defining a first window area within said first revolving surface; a metering element with a metering port for metering granular material onto said side at said metering region; a second window area coincident with said second revolving surface and between two second radial planes originating from said axis of rotation, said two second radial planes describing a second mid-point angle at least as large as said first mid-point angle; a collision region outside said revolving body area and proximate said second window area; a fixedly located material flow region for said granular material exiting said central chamber area and moving toward said collision region via said first and second windows areas said flow region adjoining said first window towards said collision region; and said flow region including a straight portion directed outwards and forwards when seen from a stationary viewpoint and a spiral portion directed outwards and backwards when seen from a viewpoint moving with said guide element a stationary collision element positioned in said collision region and presenting a stationary collision surface for said granular material to strike, said collision element having at least two outer edges oriented parallel to said axis of rotation and said collision surface oriented transversely to a direction of movement of said granular material in said straight portion of said flow region, said collision element extending between two third radial planes originating from said axis of rotation and describing a third mid-point angle at least as large as said second mid-point angle, said flow region having a width at said collision element that terminates interior to said outer edges of said collision element so that said granular material striking said collision element does not strike said outer edges.