Journal . d into the centre through a hole in one of thediscs, and in passing outwards is struck by thebars and knocked first in one direction and thenthe other, being struck by perhaps eight sets ofbars before it leaves the mill. The action canbest be likened to a series of squirrel cages onewithin the other and rotating in alternate direc-tions ; hence the name, cage mills. A mill hasbeen designed for rock crushing in which thematerial was to be its own grinding medium ; itconsisted of two funnel-shaped discs runningmouth to mouth in opposite directions, the ideabeing that the material (brok
Journal . d into the centre through a hole in one of thediscs, and in passing outwards is struck by thebars and knocked first in one direction and thenthe other, being struck by perhaps eight sets ofbars before it leaves the mill. The action canbest be likened to a series of squirrel cages onewithin the other and rotating in alternate direc-tions ; hence the name, cage mills. A mill hasbeen designed for rock crushing in which thematerial was to be its own grinding medium ; itconsisted of two funnel-shaped discs runningmouth to mouth in opposite directions, the ideabeing that the material (broken down in a stone-breaker) on being fed into the mill would fill upthese fimnels which would then act as millstones(see fig. 16). Eccentric disc mills. Here one disc is smallerthan the other, and has a central hole through which the feed readies the mill. This disc isdriven, carrying round with it the lower disc,setting up a shearing action, while pressure canbe regulated by raising or lowering the bottom. disc. Sometimes the top disc is convex, and thelower one concave. The end runner mill, whichbelongs to this class, is somewhat similar to, butmuch more efficient than the mechanical mortar(see fig. 17). 1^/ //} {//AAV//,, On Spinal ^ortzcn/ai MiU
Size: 1845px × 1354px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1880, booksubjectchemist, bookyear1882
