Adjustable rotary crusher
OwnerPeter M. Francisinventor
Life of this patent
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Abstract
A rotary solids crusher has three product exits for selectively removing product particle sizes produced by secondary, tertiary, or fine grind crushing. In the fine grind mode, the crusher has an unobstructed vertical attrition chamber from which air-entrained particles exit at high velocity, and are subsequently classified by particle size using the energy inherent in the rapidly moving stream to effect settling; e.g., by gravity or in centrifugal separators.
Claims3
In an apparatus for crushing solid particles having a housing, inlet means for passing material to be crushed into an impact reduction chamber, an impact reduction chamber within the housing, an impact rotor having impact hammers at its periphery, drive means to rotate the impact rotor, a fluidizing rotor removably mounted near the bottom of the impact reduction chamber, and drive means to rotate the fluidizing rotor, the improvement therein which comprises an attrition chamber extending from the impact reduction chamber vertically above the impact rotor, first product exit means located at the bottom of the impact reduction chamber, second product exit means located in a lower portion of the housing opposite the inlet means and generally adjacent to the first product exit means, third product exit means located at an upper portion of the attrition chamber, and first, second, and third closure means to selectively close the first, second, and third product exit means.
Dependencies are inferred from the claim text.