Improved mill for grinding powder and method of using

Details Improved mill for grinding powder and method of using Improved mill for grinding powder and method of using

1988-08-05

1989-05-23

Eley, Timothy V.

Solid material comminution or disintegration

Processes

By utilizing kinetic energy of projected or suspended material

241 24, 241 39, 241 42, 241152R, B02C 1906

Patent

active

048322687

ABSTRACT:
A mill for grinding powder material is disclosed having a cylindrical separation chamber into which the powder material is fed as a dispersion in a gas stream. Powdered material initially is supplied through two spaced powder inlets each located between a jet and a venturi throat assembly so that milling fluid introduces the powder material through the venturis and the venturis are mounted in opposition so that the gas streams carrying the powder impinge on one another to impart grinding. The impinged material passes to a third venturi to be entrained in a gas fed from a third jet nozzle and introduced through the venturi into the separation chamber. The mill is of particular use for milling pigmentary powders.

REFERENCES:
patent: 253344 (1882-02-01), Chichester
patent: 4018388 (1977-04-01), Andrews
patent: 4504017 (1985-03-01), Andrews
patent: 4524915 (1985-06-01), Yamagishi

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