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betsy stone

gold processing equipment a diagrammatc showing - 1 views

started by betsy stone on 29 Aug 14
  • betsy stone
     
    A further object of this invention is to provide a discharge grid which is particularly adapted for the system and method of grinding described herein.Other objects will appear from the following detailed description, taken in connection with the attached drawing and the claims appended hereto.In the drawing:gold processing equipment Fig. 1 is a horizontal, vertical section through a ball or pebble mill in accordance with this invention; Fig. 2 is a diagrammatic showing of a mill circuit comprising a single grinding mill; Fig. 3 is a diagrammatc showing of a mill circuit comprising a primary grinding mill in circuit with a secondary grinding mill;

    Fig. 4 is an elevation view of a ball mill grate peculiarly adapted for use in a ball mill in accordance with the present invention; Fig. 5 is a sectional view of the grate taken along the line V-V of Fig. 4; and Fig. 6 is a developed view of the periphery of the grate taken along the line VI-VI of Fig. 4.In grinding ore, cement clinker and the like in ball mills,ball mill manufacturer it is well known that the steel balls or pebbles which do the grinding become worn during use. This wear of the balls or pebbles reduces the size thereof. Since it is desirable to maintain the size of the grinding media within certain limits, and especially so for fine grinding, operators of grinding mills are faced with one of two alternatives: either to shut down the mill and remove the grinding media which are smaller than that required for maximum efficiency;

    Or to leave the small and broken grinding media in the mill, thereby reducing the efficiency of the grinding. In accordance with the present invention the grinding media are continuously discharged from the mill together with the ground material, and only that portion of the grinding media which is still in good condition and of the correct size is returned to the feed end of the mill.Furthermore, it has een found in practice that, within limits, the finer the material being ground the smaller should be the grinding media.

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