Patents Assigned to Ilok Powder Company, Inc. - Justia Patents Search

Patents Assigned to Ilok Powder Company, Inc.

Process and equipment for the production of ultrafine powders particularly of coal powders with the help of a continuous cold warm influence on the ground material

Patent number: 3991943

Abstract: A process is disclosed for conversion of coal powder of 4 micron size into a finer powder of the order of 1/400 micron by passing through a vertical tube of sufficient length at a temperature of -77.degree. C and thereafter passing through a second chamber by force of gravity where a counter stream of heated nitrogen at 780.degree. C causes the powder to break up into the smaller size particles.

Type: Grant

Filed: March 20, 1975

Date of Patent: November 16, 1976

Assignee: Ilok Powder Company, Inc.

Inventor: Hans Rohrbach, deceased