GB190924854A - Improvements in Crushing, Pulverising and Amalgamating Machines. - Google Patents

Abstract

24,854. Hall, C. E. Oct. 29. Ball mills ; crushers with vibrating jaws.- Apparatus for crushing, pulverizing, screening, and amalgamating ores, quartz, &c. comprises a preliminary jaw-crusher for reducing large pieces of rock, and a ball or tube mill having rough and fine crushing-chambers with a screening-chamber at its end. The jaw-crusher has one or more serrated swing jaws B, Fig. 1, mounted at the lower end upon an eccentric shaft supported in bearings M, and the crushed material passes by a spout J into the rough-crushing chamber E, Fig. 1<A>, of the ball mill. The chamber E contains different-sized balls and is lined with steel side plates C' and an outer ring C, beneath which renewable bars forming grids are placed. Lifting- bars E<1> are fitted in the mill ; and the material which passes through the grid is directed by inclined bars E<3> into curved ducts which deliver into the long ball mill V. The material is pounded by a number of smaller balls in the drum V and passes to the enlarged screening-chamber X, a guard-plate 7 preventing the passage of the balls. The drum V is lined with curved steel plates which may be stepped, and any coarse residue left in the chamber X is returned to the drum V by the internal buckets Y. The ball mill is supported by circular rails 2<A> on friction rolls 2. Fig. 8 shows a modification in which the ball mill has two annular chambers P ; the ore passes between the bars E, E<1> into the screen X, and the coarser sand is returned by the duct plate N to the mill for re-grinding ; the finished stuff passes by the plate M into an amalgamating-chamber F. The chamber F is charged with balls and lined with renewable plates V forming corrugations at their joints, the removable end-plate H being operated by a handwheel J on a screw fixed to the stop-plate I. According to the Provisional Specification, serrated teeth are cast upon the faces of the jaw-crusher in series from top to bottom, and the bottom series of teeth on the fixed jaw are inclined forwards while those on the moving jaw are inclined backwards. Specification 17,521/90 is referred to.