PROCESS FOR MAKING TITANIUM DIOXIDE CONCENTRATES

PROCESS FOR MAKING TITANIUM DIOXIDE CONCENTRATES

Iron and, if appropriate, manganese and vanadium are removed from titanium oxide-containing material having a content of the oxides thereof by means of chlorine-containing gases without an addition of carbon in a chlorination zone at temperatures of above 900 DEG C. Oxygen and volatile iron chloride...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: KLAUS JODDEN, GERO HEYMER, HORST NIELEN, HANS-WERNER STEPHAN
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:Iron and, if appropriate, manganese and vanadium are removed from titanium oxide-containing material having a content of the oxides thereof by means of chlorine-containing gases without an addition of carbon in a chlorination zone at temperatures of above 900 DEG C. Oxygen and volatile iron chlorides and, if appropriate, manganese chloride and vanadium chlorides are thus set free. The gas phase flowing out of the chlorination zone is allowed to react in a downstream oxygenation zone at temperatures from 550 to 900 DEG C to form chlorine and metal oxides. Finally, the chlorine-containing gases are separated at temperatures of less than 300 DEG C from the metal oxides contaminated with unconverted fractions of the metal chlorides, and the chlorine-containing gases are returned to the chlorination zone.