Method and apparatus for pulverizing materials by vacuum comminution
AssigneeProcess Development, Inc.
InventorWilliam A. Colburn
Life of this patent
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Abstract
A method and apparatus for comminuting minerals and similar materials by vacuum comminution includes an arrangement for introducing the material to the low pressure chamber at a high velocity whereby the rate of change of pressure on the particles of material is greatly increased. The degree of comminution is thereby increased and the effectiveness of the system greatly enhanced.
Claims10
In a vacuum system for effecting the comminution of minerals and other frangible substances, the method for increasing the rate of pulverization and the fineness of the product which comprises:
- producing a low-pressure zone and a continuous flow of air into the zone and a discharge of air from the zone;
- providing a mass of material to be pulverized;
- and
- injecting the material into the low-pressure zone at a significant initial velocity produced by a force independent of the force utilized for producing said low-pressure zone, whereby the material is subjected to a sudden corresponding increased rate of change of pressure upon entering said low-pressure zone.
In a vacuum type comminution apparatus for the pulverization of minerals and other frangible substances which comprises a blower for producing a flow of air from its inlet to its outlet and having a low pressure chamber adjacent its inlet, the improvement which comprises means independent of said blower for supplying the substance to said low pressure chamber at a significant initial velocity whereby the material entering said chamber is subjected to a corresponding increased rate of change of pressure.
Dependencies are inferred from the claim text.