PROCESS FOR MAKING A TITANIUM DIOXIDE CONCENTRATE

PROCESS FOR MAKING A TITANIUM DIOXIDE CONCENTRATE

Titanium dioxide concentrates are prepared by removing the iron from material which contains titanium oxide and iron oxides by means of gases containing at least 70% by volume of chlorine, by converting at least 0.1% of the iron present in the titanium oxide-containing material by means of a reducin...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: FRIEDRICH-WILHELM DORN, KLAUS JODDEN, GERO HEYMER, HANS-WERNER STEPHAN
Format: Patent
Sprache:eng
Schlagworte:
CHEMISTRY
COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F
FERROUS OR NON-FERROUS ALLOYS
INORGANIC CHEMISTRY
METALLURGY
PRETREATMENT OF RAW MATERIALS
PRODUCTION AND REFINING OF METALS
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Beschreibung
Zusammenfassung:Titanium dioxide concentrates are prepared by removing the iron from material which contains titanium oxide and iron oxides by means of gases containing at least 70% by volume of chlorine, by converting at least 0.1% of the iron present in the titanium oxide-containing material by means of a reducing agent at temperatures from 500 to 1300 DEG C to the zero-valent state. The partially reduced material containing titanium oxide is reacted at temperatures from 300 to 1300 DEG C with the chlorine-containing gases. The reducing agents used can be carbon or gases such as hydrogen, natural gas or carbon monoxide or mixtures thereof.