Solid material comminution or disintegration – Processes – By utilizing kinetic energy of projected or suspended material
Patent
1991-05-23
1992-09-01
Watts, Douglas D.
Solid material comminution or disintegration
Processes
By utilizing kinetic energy of projected or suspended material
241 39, 241 791, B02C 1906
Patent
active
051433036
ABSTRACT:
A method and a equipment for processing of particularly finely divided material. The material is fed by means of a mechanical feeder device (2) and a pressurized equalization tank (4) into a fluidization chamber (5). A fluidized gas-solids suspension received is accelerated through acceleration nozzles (20) into a grinding chamber of a counter-jet grinder (19) so as to grind the solid particles. The ground gas-solids suspension is passed through connecting pipe (7) into a centrifugal classifier (8). A fine fraction is removed as a gas suspension through an opening (9). Additional air of low pressure is passed into the connecting pipe (7) and the coarse fraction is removed from the centrifugal classifier through a removal opening (10) in the peripheral face of the classifier into a pocket (12) outside said peripheral face, whereby the coarse fraction in the pocket (12) is removed batchwise by means of a closing device (13).
REFERENCES:
patent: 4235665 (1980-11-01), Reinhall et al.
patent: 4304360 (1981-12-01), Luhr et al.
patent: 4586661 (1986-05-01), Niemi
patent: 4811907 (1989-03-01), Niemi
Oy Finnpulva AB
Watts Douglas D.
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