Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1974-04-12
1976-11-02
Curtis, Allen B.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 21, 75 26, 75 40, 423 76, 423 84, 423492, C22B 100, C22B 510, C22B 516
Patent
active
039895106
ABSTRACT:
A reactor operating at a maximum temperature above 1535.degree. C and up to about 1950.degree. C is charged with a mixture of: (a) iron bearing titaniferous ore or its concentrate, or a residue from other operations containing iron and titanium, at least some of which is present as oxides, also (b) silica -- combined or separately added, also (c) one or more chlorides of a third metal of the alkaline or alkaline earth group, such as common salt and/or calcium chloride, also (d) a solid reductant as coke. Some impurities of the original material are removed as volatile chlorides or oxy-chlorides; the titanium also goes off as TiCl.sub.4 in the gas stream, the iron is withdrawn as molten metallic iron, and the third metal added as the chloride: e.g., the sodium of the common salt or the calcium of its chloride unites with the silica to give a silicate, such as sodium silicate (water glass) and/or calcium silicate which acts as a flux to remove the gangue from the iron. Most of the chlorine is supplied by the chlorine in this third-metal chloride through the separation by the chloride interaction with the iron and titanium: including that leaving in the titanium tetra-chloride, and in other volatile chlorides or oxy-chlorides, or remaining in the gangue as non-volatile chlorides. This third metal, such as the sodium and/or calcium, unites with the silica to form an effective silicate flux to remove various solid impurities.
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Curtis Allen B.
Waltz Thomas A.
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