Mineralogy and carbothermal reduction behaviour of vanadium-bearing titaniferous magnetite ore in Eastern India

• Published in: International journal of minerals, metallurgy and materials metallurgy and materials, 2013-10, Vol.20 (10), p.917-924
• Main Authors: Samanta, Saikat, Goswami, Manik Chandra, Baidya, Tapan Kumar, Mukherjee, Siddhartha, Dey, Rajib
• Format: Article
• Language: English
• Subjects: Activated carbon; Activated charcoal; Beneficiation; Ceramics; Characterization and Evaluation of Materials; Charcoal; Chemistry and Materials Science; Composites; Corrosion and Coatings; Emission analysis; Emission spectroscopy; Gabbro; Gas mixtures; Glass; ICP-AES; Inductively coupled plasma; Iron; Magnetic separation; Magnetite; Materials Science; Metallic Materials; Mineralogy; Natural Materials; Precambrian; Roasting; Surfaces and Interfaces; Thin Films; Titanium dioxide; Tribology; Vanadium; Vanadium pentoxide; Wave dispersion; X-ray diffraction; X射线荧光光谱仪; 印度; 扫描电子显微镜; 电感耦合等离子体; 矿物学; 还原行为; 钒钛磁铁矿
• ISSN: 1674-4799; 1869-103X
• DOI: 10.1007/s12613-013-0815-3

Vanadium-beaxing titaniferous magnetite bands hosted by Precambrian gabbro-norite-anorthositic rocks or their metamorphic equivalents were discovered in some parts of Eastern Indian Shield, containing 48%-49% Fe （total）, 10%-25% TiO2, and 0.3%-2.20% V2O5 by mass. Mineralogical and petrological study, composition, and characterization of the vanadium-bearing titaniferous magnetite ore were carried out by scanning electron microscopy-energy dispersive X-ray （SEM-EDX）, wave length X-ray florescence （WDXRF）, inductively coupled plasma-atomic emission spectroscopy （ICP-AES）, X-ray diffraction （XRD）, etc. Chemical beneficiation for valuable metals, such as Fe, Ti, andV, was performed by reduction roasting. The direct and indirect reduction were investigated by mixing the lump ore with solid activated charcoal in a closed reactor and purging the reducing gas mixture in standard reducibility index apparatus at different temperatures and time intervals. The reduction roasting parameters were optimized. Finally, the reduced samples were crushed and upgraded by magnetic separation. The results show that, the maximum mass fractions of magnetic and nonmagnetic parts achieved axe 69.36% and 30.64%, respectively, which contain 10.6% TiO2 and 0.84% V205 in the magnetic part and 36.5% TiO2 and 0.22% V205 in the nonmagnetic part.