Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1984-09-17
1985-07-16
Rosenberg, Peter D.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 3, 75 6, 75 11, C22B 400
Patent
active
045294399
ABSTRACT:
The invention discloses processes for preparing matched sizes of electric furnace feed materials. With the matched sizes, components of the feed mixture do not separate inside the furnace and this decreases the electric energy for smelting. Preparation of matched sizes of materials is made possible by low-temperature agglomeration followed by drying to indurate the agglomerates. Fuel requirements for induration are substantially reduced, and environmental problems associated with high-temperature agglomeration are eliminated. Phosphate ores can be agglomerated and simultaneously the ores are upgraded by increasing the P.sub.2 O.sub.5 content. Unbeneficiated phosphate ores heretofore considered unsuited for smelting can be used as phosphate sources for the production of phosphorus. A combustible gas consisting mainly of carbon monoxide and hydrogen is generated when ores are smelted. Processes are disclosed for cleaning the gas to permit it to be burned in a facility for the cogeneration of electric energy. At phosphorus furnaces the potential energy in the gas is equal to about 65 percent of the electric energy used in smelting; consequently, the net electric energy consumption can be substantially reduced by operation of a cogeneration facility.
REFERENCES:
patent: 3215522 (1965-11-01), Kuhlmann
patent: 3276859 (1966-10-01), Collin
patent: 3495971 (1970-02-01), Ban
patent: 3912501 (1975-10-01), De Castejon
Burt & Barber, "Production of Elemental Phosphorus by the Electric-Furnace Method", Ch. E. Rep. No. 3, (Tennessee Valley Auth. 1952).
James C. Barber and Associates Inc.
Rosenberg Peter D.
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