Sarangi, A and Misra, S (1983) Kinetics of Reduction of Vanadiferous Titanomagnetite ore of Orissa. In: Proceedings of the Seminar on Problems and Prospects of Ferro-Alloy Industry in India, Oct. 24-26, 1983, NML, Jamshedpur.
200 mesh powder of vanadium bearing titaniferous magne-tite ore was pelletised to 0 5 cm dia spheres, heat hardened at 1100'C for z hour in nitrcgen. The pellets were reduced in a calibrated mixture of 60% N2, 40% CO. The temperature vs weight loss was recorded in a Shimad -zu Thermogravimeter model TGA-31 at 900, 955, 999 and 1050°C. The results conformed to Mc Kewan's phase bound-ary reaction model, yielding an activation energy of 25.5 kcal / mole. No kinetic studies of reduction of titan-omagnetite has been reported. The activation energy for magnetite reduction ranges from 13 to 45 kcal/mole as reported in literature. Presence of TiO 2 is known to hinder reduction kinetics of iron oxides. The observed higher activation energy and slower rate of reduction of titanomagnetite has been explained in terms of its spine/ structure and preferential positions of metal ions.
|Item Type:||Conference or Workshop Item (Paper)|
|Uncontrolled Keywords:||Vanadiferous Titanomagnetite ore; titaniferous magnetite; titanomagnetite; metal ions; nitrogen|
|Divisions:||Metal Extraction and Forming|
|Deposited By:||Sahu A K|
|Deposited On:||17 Sep 2012 21:54|
|Last Modified:||17 Sep 2012 21:54|
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