Patent ID: 6032887
Filing Date: 2000-03-07
Classification: B02C

Abstract:
A circuit grinding apparatus for the interparticle crushing of granular material with an integrated sifter, comprising,a housing having two stationary lateral end walls and a conveyor ring rotatably seated in and extending therebetween,a pair of rollers axially spaced from one another and extending between said lateral ends walls, said rollers defining a nip between one another and being adapted for rotation in opposite directions,at least one product material admission for admitting said granular product material into said housing,at least one product material discharge for discharging comminuted granular product material from said housing,said conveyor ring being adapted to re-circulate said granular product within said housing and delivery said granular product material to said nip one or more times for pressure communition,said sifter being arranged underneath said nip of said two rolls in said housing, wherein said sifter is a static cascade sifter that operates simultaneously as a de-agglomerator, with at least one row of guide plates inclined downward and arranged one over the other in cascade or louvered fashion, through whose intermediate spaces there flows sifter air in a cross-current from an air inlet to an air outlet.