Effects of smelting parameters on the slag/metal separation behaviors of Hongge vanadium-bearing titanomagnetite metallized pellets obtained from the gas-based direct reduction process

Smelting separations of Hongge vanadium-bearing titanomagnetite metallized pellets (HVTMP) prepared by gas-based direct reduction were investigated, and the effects of smelting parameters on the slag/metal separation behaviors were analyzed. Relevant mechanisms were elucidated using X-ray diffractio...

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Bibliographic Details
Published in:International journal of minerals, metallurgy and materials metallurgy and materials, 2018-06, Vol.25 (6), p.609-622
Main Authors: Feng, Cong, Chu, Man-sheng, Tang, Jue, Liu, Zheng-gen
Format: Article
Language:English
Subjects:
Calcium oxide
Ceramics
Characterization and Evaluation of Materials
Chemistry and Materials Science
Chromium
Composites
Corrosion and Coatings
Direct reduction
Glass
Materials Science
Metallic Materials
Metallizing
Metallurgy
Natural Materials
Parameters
Pellets
Pig iron
Recovery
Separation
Silicon dioxide
Slag
Smelting
Surfaces and Interfaces
Thin Films
Titanium dioxide
Tribology
Vanadium
X-ray diffraction
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Summary:Smelting separations of Hongge vanadium-bearing titanomagnetite metallized pellets (HVTMP) prepared by gas-based direct reduction were investigated, and the effects of smelting parameters on the slag/metal separation behaviors were analyzed. Relevant mechanisms were elucidated using X-ray diffraction analysis, FACTSAGE 7.0 calculations, and scanning electron microscopy observations. The results show that, when the smelting temperature, time, and C/O ratio are increased, the recoveries of V and Cr of HVTMP in pig iron are improved, the recovery of Fe initially increases and subsequently decreases, and the recovery of TiO 2 in slag decreases. When the smelting CaO/SiO 2 ratio is increased, the recoveries of Fe, V, and Cr in pig iron increase and the recovery of TiO 2 in slag initially increases and subsequently decreases. The appropriate smelting separation parameters for HVTMP are as follows: smelting temperature of 1873 K; smelting time of 30–50 min; C/O ratio of 1.25; and CaO/SiO 2 ratio of 0.50. With these optimized parameters (smelting time: 30 min), the recoveries of Fe, V, Cr, and TiO 2 are 99.5%, 91.24%, 92.41%, and 94.86%, respectively.
ISSN:1674-4799
1869-103X
DOI:10.1007/s12613-018-1608-5