Two-stage micronizer and process for reducing oversize particles using a two-stage micronizer
OwnerCharles Kepler Brown JR., David Kepler Browninventors
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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.
Claims52
A rotary size reduction system, comprising:
- a centrifugally acting primary reduction zone having an inlet;
- a center feed pipe having an outlet communicating with the inlet;
- and
- a secondary reduction zone fed directly and centrifugally from the primary reduction zone.
A method of reducing the size of chunks of material including coal, minerals, or biomass, comprising the steps of:
- reducing the size of at least some of the chunks of the material to a desired size by abrasion and particle-to-particle attrition;
- and
- following said reducing step, processing those chunks which have not been reduced to the desired size by a crushing action so that they are reduced to the desired size.
A rotary size reduction system, comprising:
- a centrifugally acting primary reduction zone having an inlet;
- and
- a center feed pipe having an outlet communicating with the inlet.
A size reduction device as recited in claim 52, wherein the spacing of the pairs of the cut-outs is mass-balanced.
Dependencies are inferred from the claim text.