Low pressure ultra-high energy cryogenic impact system

Details Low pressure ultra-high energy cryogenic impact system Low pressure ultra-high energy cryogenic impact system

1996-12-23

1998-07-07

Husar, John M.

Solid material comminution or disintegration

Processes

With heating or cooling of material

241 65, 241DIG14, 241DIG37, B02C 1900, B02C 1912

Patent

active

057756031

ABSTRACT:
The present invention relates to an ultra-high energy impact system for reducing the particle size of materials to an average diameter as small as about 40 .mu.m. The system includes a cooling station for cooling the materials to a temperature within the range of from about -40.degree. F. to about -450.degree. F. by direct contact with refrigerant, preferably liquid refrigerant; a milling station for reducing the particle size of the cooled materials which does not require direct cooling by refrigerant and which includes a rotor or rotors each operating at a tip speed within the range of from about 500 to about 1500 feet per second; and an atmosphere modifier for reducing the pressure of the gaseous atmosphere within the milling station to less than 20 inches of mercury absolute.

REFERENCES:
patent: 4102503 (1978-07-01), Meinass
patent: 4340076 (1982-07-01), Weitzen
patent: 4645131 (1987-02-01), Hailey
patent: 5011087 (1991-04-01), Richardson et al.
patent: 5375775 (1994-12-01), Keller et al.
patent: 5597123 (1997-01-01), Steigman et al.

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