APPARATUS FOR FRACTURING POLYCRYSTALLINE SILICON AND METHOD FOR PRODUCING FRACTURED FRAGMENT OF POLYCRYSTALLINE SILICON

PROBLEM TO BE SOLVED: To fructure the polycrystalline silicon into masses with a disired size and to exchange only a tooth when chipping or wearing occures in a part of the tooth.SOLUTION: In an apparatus for fracturing polycrystalline silicon fracturing the clumped polycrystalline silicon by holding the same between a pair of rolls rotated in a counter direction each other around parallel axes; a plurality of fracturing teeth unit 8 having a plurality of fracturing teeth 5 and a fixing cover 11 fixing the fracturing teeth 5 onto the outer peripheral surface of the rolls are arrange lining in the peripheral direction of the rolls in the outer peripheral surface of the rolls, flange parts 14 enlarged in a diameter in the distal end of the same are formed in the fracturing teeth 5, the fixing cover 11 is formed into a ribbon-shape extending along the longitudinal direction of the rolls and fixed to the rolls such that a plurality of fracturing teeth fixing holes 21 passing through in the thickness direction are formed lining in the longitudinal direction, the distal end parts of the fracturing teeth 5 are projected outward in a radial direction of the rolls from the fructuring teeth fixing holes 21, and the flange parts 14 are held between the rolls.