Patent ID: 7360727
Filing Date: 2008-04-22
Classification: B02C,C01B

Abstract:
1. A method for a mechanical communution of a polycrystalline silicon ingot comprising the steps of: providing a mechanical crushing apparatus comprising a height-adjustable base having a longitudinal axis and a top surface, generally opposed comminution chisel and mating chisel pairs, said comminution chisels and said mating chisels having longitudinal axes oriented at right angles to the longitudinal axis of said height-adjustable base and parallel to the surface of said height-adjustable base, locating a polycrystalline silicon ingot on said height-adjustable base, positioning the ingot between said comminution chisels and said mating chisels such that chisels in the region of the silicon ingot are in contact with the silicon ingot and said comminution chisels and said mating chisels, in front of or behind the silicon ingot, are moved toward one another in the direction of their longitudinal axis to within a safety distance, and then a recurring striking movement is started for all the comminution chisels bearing against the silicon ingot, effecting comminution of the silicon ingot into Si fragments.