Grinding mill

摘要

Disclosed is a grinding mill including a roller press configured to comminute grinding stock, a first conveying mechanism in communication with the roller press and configured to transport downstream at least one of fresh grinding stock or grinding stock comminuted by the roller press, and a static sifter disposed downstream of the first conveying mechanism and configured to sift at least one of the fresh grinding stock or grinding stock comminuted by said roller press. The static sifter includes a sifting stock inlet disposed in an upper sifting space, and sifting gas inlet disposed in a lower sifting space, and an aeration plate separating the upper sifting space from the lower sifting space. The aeration plate also permits sifting gas to pass there through from the lower to the upper sifting space. The static sifter also includes oversized material outlets disposed in each of the respective upper and lower sifting spaces.

主权项

1. A grinding installation, comprising:
a roller press having two counter-rotating grinding rollers and configured to comminute grinding stock; a first conveying mechanism in operative communication with said roller press and configured to transport at least one of fresh grinding stock or the grinding stock comminuted by said roller press downstream; and a static sifter disposed downstream of and in operative communication with said first conveying mechanism and configured to sift the at least one of the fresh grinding stock or grinding stock comminuted by said roller press, said static sifter having,
a sifting stock inlet disposed at a side of said sifter that is oriented toward said first conveying mechanism, said sifting stock inlet configured to accept at least one of fresh grinding stock or grinding stock comminuted by said roller press that has been conveyed to said sifter by said first conveying mechanism,a sifting gas inlet disposed at a side of said sifter that is oriented away from said first conveying mechanism, said sifting gas inlet configured to permit sifting gas to flow into said sifter,an aeration plate disposed within said sifter between each of said sifting stock inlet and said sifting gas inlet and at an angle to a horizontal plane, said aeration plate defining a first upper sifting space disposed above said aeration plate into which upper sifting space said sifting stock inlet opens and a second lower sifting space disposed below said aeration plate into which lower sifting space said sifting gas inlet opens, said aeration plate configured to permit sifting gas to flow from said sifting gas inlet in said second lower sifting space, through said aeration plate, and into said first upper sifting space so as to mix sifting gas with grinding stock conveyed through said sifting stock inlet into said first upper sifting space,a first oversized material outlet disposed in said first upper sifting space and in operative communication with said roller press, said first oversized material outlet configured to permit the removal of oversized material from said upper sifting space such that the oversized material can be conveyed back to said roller mill to be further comminuted,a second oversized material outlet disposed in said lower sifting space and configured to permit the removal of oversized material from said lower sifting space, anda fine material outlet disposed in said first upper sifting space.