Method and apparatus for the metered feed of coarse granular mat

Details Method and apparatus for the metered feed of coarse granular mat Method and apparatus for the metered feed of coarse granular mat

1998-05-08

1999-10-19

Hail, III, Joseph J.

Solid material comminution or disintegration

Processes

By utilizing kinetic energy of projected or suspended material

241 33, 241 39, B02C 1906

Patent

active

059674296

ABSTRACT:
For the metered feed of coarse granular material into an air jet mill an injector 3 operated by propellent air is used, the coarse material being fed continuously to a closed injector hopper 6 provided on the injector 3. In the injector hopper 6, the pressure is measured at a product-free point and, by resetting the propellent air mass flow at the injector 3 is held constant at a preselected setpoint partial vacuum value. Said setpoint value is preferably set so low that at said pressure there is only just no return flow from the injector 3 into the injector hopper 6. The apparatus for effecting said method comprises a control loop having a pressure sensor 16 for measuring the flow in the closed injector hopper 6, a motor-adjustable valve 4, 5 as an actuator for varying the supplied propellent air mass flow and a loop controller, which compares the actual pressure value with a preselected setpoint value and supplies a control signal for operating the actuator 4, 5.

REFERENCES:
patent: 2763437 (1956-09-01), Marchant
patent: 4592302 (1986-06-01), Motoyama
patent: 4668130 (1987-05-01), Sharp
patent: 4679704 (1987-07-01), Dunlop et al.
patent: 4917309 (1990-04-01), Zander
patent: 4936280 (1990-06-01), Langlois
patent: 5407305 (1995-04-01), Wallace
patent: 5494381 (1996-02-01), Heyl et al.
patent: 5517974 (1996-05-01), Akase
patent: 5813801 (1998-09-01), Newbolt et al.

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