Industrial electric heating furnaces – Arc furnace device – Power supply system
Patent
1981-08-18
1984-01-10
Envall, Jr., Roy N.
Industrial electric heating furnaces
Arc furnace device
Power supply system
373 24, H05B 700
Patent
active
044256590
ABSTRACT:
A metal oxide reduction furnace has a shaft holding a verticle column of coke. An electric arc on the side of the lower portion of the column burns a cavity in the coke column and the arc is surrounded by the side wall and inner closed end of the cavity so that high temperatures are obtained. A stream of the metal oxide in particulated form mixed with a reducing agent is projected into the cavity to react endothermically within the cavity and lower the high temperature while reducing the oxide to its metal.
REFERENCES:
patent: 1587197 (1926-06-01), Southgate
patent: 1904683 (1933-04-01), Greene
patent: 4110546 (1978-08-01), Stenkvist
patent: 4149024 (1979-04-01), Stenkvist et al.
patent: 4334917 (1982-06-01), Kibby
Asea AB
Envall Jr. Roy N.
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