Reduction of iron in titanium ore

Details Reduction of iron in titanium ore Reduction of iron in titanium ore

1974-12-30

1977-07-26

Stern, Edward

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group ivb metal

423 80, 423 82, 423610, C01G 2304, C01G 2308, B01D 1102

Patent

active

040383644

ABSTRACT:
In the production of synthetic rutile from a titanium and iron-containing ore by reducing most of the iron(III) in said ore into iron(II) with a steam-containing gaseous reducing agent at a temperature of about 850.degree. to 1100.degree. C, followed by leaching to remove the iron(II) and iron(III) and drying of the residue, the improvement which comprises using as said reducing agent a gas containing hydrogen and steam and optionally at least one of CO and CO.sub.2 wherein the H.sub.2 + CO : H.sub.2 O + CO.sub.2 molar ratio of the reducing agent is between 0.36 and 1.8. The reducing agent may comprise a mixture of hydrogen and steam or it may be the partial combustion product of a hydrocarbon. Advantageously, the ore is oxidized at 550.degree. to 1200.degree. C prior to reduction. The reduction permits ready dissolution of the iron during leaching without risk of hydrogen evolution.

REFERENCES:
patent: 2127247 (1938-08-01), Dawson
patent: 3291599 (1966-12-01), Reeves
patent: 3305312 (1967-02-01), Weinstein et al.
patent: 3660029 (1972-05-01), Naguib
patent: 3929963 (1975-12-01), Kurata et al.

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