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Erschienen in:
2016 | OriginalPaper | Buchkapitel
Production of Titanium Oxycarbide from Titania-Rich Mineral Sands
verfasst von : Farzin Fatollahi-Fard, Petrus Christiaan Pistorius
Erschienen in: EPD Congress 2015
Verlag: Springer International Publishing
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The production of titanium oxycarbide — a consumable anode material used in molten-salt processes for electrowinning titanium — from heavy mineral concentrate, such as a high-titania leucoxene and natural rutile is described. The oxycarbide is prepared by carbothermic reduction of the oxide at elevated temperature. Particle size distribution (of the titanium oxide raw material) and temperature have large effects on the kinetics of the reaction, which seem to follow a “shrinking-core” model. It is anticipated that low porosity (in the anode pellets) would be advantageous during electrolysis. Particle size distribution, extent of reaction during carbothermic reduction, and sintering temperature are expected to affect pellet porosity after sintering, and are being tested experimentally.