Staged cascade mill
AssigneeDynacorp Engineering Inc.
InventorWendell E. Howard
Life of this patent
Estimating the term…
Abstract
Material reduction apparatus is provided in the form of a staged cascade mill comprising a vertically stacked series of material reduction chambers, each having therein a single motor-driven rotor structure, the chambers being interconnected in a manner such that the material to be reduced in size may be sequentially passed through the chambers from the uppermost chamber to the lowermost chamber. Each of the stacked chambers has an adjustable reduction structure disposed therein and operative in a manner such that the material reduction action from the uppermost chamber to the lowermost chamber progressively changes from a predominantly impact type material reduction action to a predominantly crushing/grinding type material reduction action.
Claims20
Material reduction apparatus comprising:
- a plurality of material reduction chambers interconnected in series in a manner such that material to be reduced from an initial size to a predetermined final size may be sequentially passed through said plurality of material reduction chambers from a first one thereof to a last one thereof,
- each of said material reduction chambers having internal reduction structure for providing a portion of the overall required material size reduction by a combination of impact and crushing/grinding actions,
- the percentage relationship between said actions progressively changing in said material reduction chambers from a predominantly impact action in said first material reduction chamber to a predominantly crushing/grinding action in said last material reduction chamber,
- each of said internal reduction structures comprising a rotor portion disposed between two facing breaker plate portions selectively adjustable toward and away from said rotor portion, the configurations of the rotor and breaker portions in said material reduction chambers varying from chamber to chamber.
Material reduction apparatus comprising:
- a staged cascade mill having a vertically stacked plurality of material reduction chambers interconnected in series in a manner such that material to be reduced from an initial size to a predetermined final size may be sequentially passed through said material reduction chambers from the uppermost one to the lowermost one,
- each of said material reduction chambers having, within its interior, a single, motor-driven rotor structure and associated reduction structure for providing a portion of the overall required material size reduction by a combination of impact and crushing/grinding actions,
- the percentage relationship between said actions progressively changing in said material reduction chambers from a predominantly impact action in said uppermost material reduction chamber to a predominantly rushing/grinding action in said lowermost material reduction chamber.
A material size reduction method comprising the steps of:
- forming a plurality of material reduction chambers;
- interconnecting said material reduction chambers in a series relationship;
- permitting a material to be size-reduced to internally traverse said material reduction chambers from a first one thereof to a last one thereof;
- providing material reduction structure in each of said material reduction chambers;
- and
- operating said material reduction structures in a manner causing them to sequentially provide the material with portions of a predetermined overall size reduction thereof by a combination of impact and crushing/grinding actions in a manner such that the percentage relationship between said actions progressively changes from a predominantly impact action in the first material reduction chamber to a predominantly crushing/grinding action in the last material reduction chamber.
Dependencies are inferred from the claim text.