Apparatus for forming magnetite electrostatographic carriers

Details Apparatus for forming magnetite electrostatographic carriers Apparatus for forming magnetite electrostatographic carriers

1976-05-27

1977-04-26

Flint, Jr., J. Howard

Plastic article or earthenware shaping or treating: apparatus

Means making particulate material directly from liquid or...

By means applying fluid jet or blast to unconfined liquid...

75 11, 75 5BB, 264 10, 264 13, 148105, 252 6256, 427127, 266127, B29C 2300, B28B 154

Patent

active

040198421

ABSTRACT:
In preferred form, the inventive concept utilizes a carbon arc plasma flame assembly wherein magnetic ore particles are fed to the plasma flame assembly in the presence of a controlled, gaseous atmosphere. The plasma flame assembly comprises a cathode and at least two carbon anodes to which is fed oxygen gas in a controlled amount. Upon contact with the plasma flame, the ore particles become molten droplets which fall by gravity into a spheroidization column having a controlled atmosphere. As the molten droplets fall, they cool and become spheroidal particles. The chamber wherein the heating occurs is substantially sealed and is initially purged with inert gas. In addition, the spheroidization column is fitted with an exhaust system which maintains the integrity of the processing atmosphere and that of the spheroidized particles.

REFERENCES:
patent: 2643180 (1953-06-01), Miller
patent: 2889874 (1959-06-01), Garwin
patent: 2968833 (1961-01-01), De Haven et al.
patent: 3059280 (1962-10-01), Laehder
patent: 3341320 (1967-09-01), Smiley
patent: 3592627 (1971-07-01), Neuenschwander
patent: 3748106 (1973-07-01), Davis et al.
patent: 3752610 (1973-08-01), Glazunov et al.
patent: 3966374 (1976-06-01), Honnorat et al.

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