Two-stage micronizer for reducing oversize particles
OwnerCharles Kepler Brown, Jr., David Kepler Browninventors
Life of this patent
Estimating the term…
Abstract
Integrated first stage and second stage reduction mechanisms reduce coal, minerals, biomass, and other materials. A portion of the reductive work is done in the first stage by passing centrally fed feed material centrifugally from rotating rings to counter-rotating rings with destructive effects. The resulting material, significantly reduced in size, subsequently is stripped of oversize in the second stage by passing through a closely spaced and specially contoured final pair of annular rings or crushing elements between which particles larger than the limited space are crushed.
Claims19
A rotary size reduction system, comprising:
- a centrifugally acting primary size reduction zone having an inlet, the primary reduction zone being configured to achieve primary reduction of the pieces of material by attrition and impacting;
- a center feed pipe having an outlet communicating with the inlet;
- and
- a secondary size reduction zone fed directly and centrifugally from the primary reduction zone, the secondary size reduction zone being configured to achieve secondary reduction of oversize pieces of material by a different type of mechanical action than the primary size reduction zone, wherein the secondary size reduction zone comprises a plurality of crushing zones and means for channeling flows of particles and gases such that particles are separated from gas-flow paths and impelled into the plurality of crushing zones.
Dependencies are inferred from the claim text.