Patent GB-253224-A (GB)
Title: A new or improved apparatus for reducing ores, or other suitable materials
IPC: B02C13/14
Filed: 1925-03-19
Abstract: 253,224. Reed, A., (Executor of Whitham, F. E.). March 19, 1925. Impact pulverizers.- In apparatus for reducing or disintegrating ores, slag, stone, granite, clinker, cork, india-rubber. paper-pulp, &c., the materials in comparatively large pieces are delivered to a reduction chamber surrounded by a shell or cage and subjected to impact whilst falling freely therein by a plurality of tiers of beaters or knives carried by a turret rotating integrally with a flv-wheel disc which is adapted to receive the broken material and to discharge it from the machine. The turret is preferably conical and is situated immediately beneath the feed-inlet and surmounted by a conical cap adapted uniformly to distribute the falling material to the beaters or knives carried by the turret. Beaters may be secured to the shell or cage to mesh with the beaters or knives on the turret. The hollow conical, or stepped conical, casting or turret 21. Fig. 1, is mounted upon a disc or fly-wheel 7 which is mounted on a cockhead 8 and secured to a wheel 6 gearing with a wheel 4 on the driving-shaft 3. A bush 10 is arranged between the cockhead 8 and a stationary vertical spindle 9 secured to the base 1, and the cockhead rests upon a double ballbearing 11 mounted upon the head of the spindle. The turret is perforated and carries superimposed horizontally-projecting arms or beaters 22 which are preferably of rectangular cross-section. A number of superimposed rings 23, preferably steel railway-wheel tyres or rings having castellated or other irregular internal surfaces, encircles the turret 21, and these rings are surrounded by a series of vertical steel rails 25 which are socketted in the top and bottom plates 26, 27 of the machine thereby forming a cage, the apertures 28, Fig. 4, in the sides of which provide communication between the reducing chamber 29 and an outer chamber 30 within the outer shell 31. Suitable gauges 32 having apertures 33 may be fitted in the openings 28. The reduced material passing into the chamber 30 falls upon a shoot 34 which guides it to the disc 7. As shown in Fig. 2, the reduced material is directed on to the beaters 22<A>, 36<A> in the lower portion of the chamber 29 for further reduction before passing to the disc 7. superimposed sets of preferably fixed horizontal arms 36 carried by the shell 31 and rings 23 mesh with the radial beaters 22 on the turret. Each set of beaters in the turret and outer shell are staggered with reference to the set of beaters next above or below. The feed-hopper 37 is provided with a vertically-adjustable gauge 38. The disc 7 throws the reduced material out through apertures between pillars 39 carrying the shell 31, and a curved plate or one or more enclosed hoppers 40 direct the material to conical plates 41 which deliver it to a conveyer &c. The cone or stepped turret shown in Fig. 2 may be made in two superimposed parts, the upper and smaller cone being detachably secured to the lower cone. The outer shell or cage may rotate in the opposite direction to the turret. For reducing waste leather, cork, &c., knives or cutters are substituted for the beaters. The reduced material thrown out of the machine may be passed. into a rotary screen or screens con. nected up to each outlet. Oil is supplied to the bush 10 from a sump 15 by a pump 13 driven from the shaft 3. Two sets of concentric seal rings or flanges 18, 19 are provided, on the disc 7 and base 1, the inner set 18 collecting the spent oil for return to the sump 15, and the outer set 19 preventing dust &c. from entering the chamber 2.