Vertical Ball Mill with Internal Materials Flow Conduit

摘要

A vertical ball mill for grinding a solid input material to form a slurry, and includes a grinding tank which defines a mixing chamber, rotatable main auger assembly having mixing blade in a lower portion of the mixing chamber and a materials flow guide. The flow conduit is provided within the grinding tank interior, and includes one or more conduit segments configured to direct input material downwardly in the grinding tank towards the lower mixing chamber and auger mixing blade. An impeller is provided within the flow conduit, with a blade configuration selected to effect the downward flow of input material through the conduit segments and outwardly therefrom adjacent to the mixing blade as the auger assembly is rotated.

主权项

1. A vertical ball mill for forming a mineral slurry comprising,
a grinding tank having a top feed port and generally cylindrical sidewall defining a side of a mixing chamber for receiving minerals to be milled therein, a selectively rotatable auger assembly having a vertically elongated axially extending shaft and at least one mixing blade provided at a lower portion of said shaft and disposed in a said mixing chamber, and at least one scraper blade disposed above said mixing blade, said scraper blade being coupled to said shaft by a support arm extending radially from said shaft towards said sidewall, a flow guide assembly disposed in said grinding tank for guiding said minerals from said top feed port towards said mixing blade, the flow guide assembly including,
a first upper conduit portion and a second lower conduit portion, the upper and lower conduit portions each being spaced from and extending radially about said shaft at positions spaced respectively above and below said scraper support arm, and defining a gap therebetween, the top feed port being configured to convey said minerals to be milled into said upper conduit, an impeller assembly coupled to said shaft at a position generally spaced below said scraper arm for rotation therewith, said impeller assembly including at least one agitator blade having a pitch orientation selected whereby the rotation of said at least one agitator blade with said shaft effects the downward movement of said minerals from said first conduit portion and through said second conduit portion towards said mixing blade.