Patent ID: 6416000
Filing Date: 2002-07-09
Classification: B02C

Abstract:
A method for at least one of(i) localising wear on a wear tip in a rotary mineral crusher, (ii) focusing output of a rotor of the rotary mineral crusher into an interaction chamber, and (iii) reducing mineral erosion of an exterior of the rotor by mineral particles energised by the output from the rotor of the rotary mineral crusher, said method comprising the step of: providing a rotary mineral crusher having a rotor into which mineral pieces to be reduced in size are fed from above and at least substantially axially of an axis of rotation of the rotor to thence migrate on at least one acceleration locus of migration via at least one retained bed of mineral pieces from the rotor substantially radially of the rotor into a surrounding interaction chamber capable of retaining a lining of the mineral material, retaining the at least one rotor retained bed of mineral pieces by a respective sacrificial edge of a wear tip over at least substantially a transversal extent of the at least one migration locus at each said sacrificial edge, said sacrificial edge being of an asymmetric form which allows an enhanced outflow of mineral pieces over a preferred region of the sacrificial edge without reliance for such enhanced outflow on one of a symmetric â€œVâ€ , â€œUâ€ , and scallop form, configuring the lining of mineral pieces of the surrounding interaction chamber so as to provide a preference for interactions of mineral pieces in a zone of the surrounding interaction chamber adequately lined with mineral pieces, and providing shielding to at least substantially confine the mineral pieces from the rotor save over at least one enhanced outflow focused band thereof at least towards the retained lining of mineral pieces of said surrounding interaction chamber.