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

Cong Feng; Man-sheng Chu; Jue Tang; Zheng-gen Liu

doi:10.1007/s12613-018-1608-5

Volume 25 Issue 6

Jun. 2018

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2018 > 25(6): 609-622

Cong Feng, Man-sheng Chu, Jue Tang, and Zheng-gen Liu, 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, Int. J. Miner. Metall. Mater., 25(2018), No. 6, pp. 609-622. https://doi.org/10.1007/s12613-018-1608-5

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Cong Feng, Man-sheng Chu, Jue Tang, and Zheng-gen Liu, 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, Int. J. Miner. Metall. Mater., 25(2018), No. 6, pp. 609-622. https://doi.org/10.1007/s12613-018-1608-5

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Research Article

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

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Corresponding author:
Man-sheng Chu E-mail: chums@smm.neu.edu.cn
Received: 25 September 2017; Revised: 12 December 2017; Accepted: 15 February 2018

Abstract

Abstract

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 TiO₂ in slag decreases. When the smelting CaO/SiO₂ ratio is increased, the recoveries of Fe, V, and Cr in pig iron increase and the recovery of TiO₂ 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/SiO₂ ratio of 0.50. With these optimized parameters (smelting time: 30 min), the recoveries of Fe, V, Cr, and TiO₂ are 99.5%, 91.24%, 92.41%, and 94.86%, respectively.
- titanomagnetite;
- vanadium;
- chromium;
- metallized pellets;
- smelting separation;
- recovery

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