GB302330A - A pulverizing apparatus - Google Patents

Abstract

302,330. Riley Stoker Corporation, (Assignees of Craig, 0.). Dec. 15, 1927, [Convention date]. Impact pulverizers.-In pulverizing apparatus comprising a rotor disc provided with beaters, a number of small wear resisting plates 53, 84 are detachably connected to the rotor disc 43 adjacent the beaters 75, 76, which may be integral with the plates 84. Each plate 84, 53 is cast with a circular boss 98, 71, Fig. 5, which is lined with a metal ferrule, and each plate is also provided with a central hole for a bolt 64 and a semicircular recesss on each side which makes a complete bolt hole with a similar recess in the adjoining plate. The rotor disc is provided with holes for the bolts and for the bosses 98, 71, and the edges of the plates are flanged to cover the edge of the disc when the plates are fixed in position. Some of the plates 53 are provided with projections 55 for agitating the material which may fall under a semicircular grating 52, Fig. 1. after passing the first beater disc 48 provided with pivoted hammers 47. The bolt heads are situated on the trailing side of the beaters to prevent wear. The coal &c. is fed through a shoot 39 and after being acted upon by the beaters 47 passes over the edge of the disc 43 and is further pulverized by the pegs 75, 76, 78, 79, the powdered coal being drawn out of the mill through an orifice 23 by a fan 38 whilst the heavier particles are returned to the mill by the rotation of arms 102 at the entrance to the orifice) 23. The casing may be provided with a lining 24 and a recess 25 in the bottom of the casing is provided with a door 26 through which unbreakable material may be removed. The rotor is balanced by bolting, on the ends of a diameter of the disc, wear resisting plates of equal weight. The pins 78, 79 are fixed resiliently to the casing by flanged ends 80. Separate air openings, controlled by dampers, may be made in the mill.