Preparation of Ti-Si-(Al) Alloy by Direct Reduction of Titanium-bearing Extracted Vanadium Tailings with Al-Si alloy

Luen SUN  Wenhui MA  Yun LEI

doi:10.12034/j.issn.1009-606X.216333

The Chinese Journal of Process Engineering >

2017 , Vol. 17 >Issue 3: 578 - 583

DOI: https://doi.org/10.12034/j.issn.1009-606X.216333

Process & Technology

Preparation of Ti-Si-(Al) Alloy by Direct Reduction of Titanium-bearing Extracted Vanadium Tailings with Al-Si alloy

Luen SUN Wenhui MA Yun LEI

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Faculty of Metallurgical and Energy Engineering, National Engineering Laboratory for Vacuum Metallurgy,
Kunming University of Science and Technology, Kunming, Yunnan 650093, China

Received date: 2016-10-26

Revised date: 2016-11-27

Online published: 2017-06-14

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Abstract

Ti-Si-(Al) alloy was prepared via reduction of titanium-bearing extracted vanadium tailings by using Al-Si alloy in electric resistance furnace under argon atmosphere. The influences of holding time, component of reductant, the addition amount of fluxing agent on the recovery of titanium as well as the composition and phase transformation of produced alloy were investigated. The results showed that appropriate technological parameters are the holding time 2 h, the composition of reductant Si-70% Al and the addition amount of flux (CaO) 45%, when the reaction tempertaure is 1500℃ and the mass ratio of slag to reductant is 3:1. At the very conditions, the recovery rate of titanium and the titanium content in produced alloy reached a maximum at 89.23% and 42.32% respectively, meanwhile, the titanium content in the slag drops from 28.8% to 2.2%. With the increase of Al content in reductant, the transformation of the main titanium-contained phase in produced alloy is TiSi₂→Ti₇Al₅Si₁₂→(TiAl₃, Ti₅Si₃).

Key words： Ti-EVT; Ti-Si-(Al) alloy; Recovery

Cite this article

Luen SUN Wenhui MA Yun LEI . Preparation of Ti-Si-(Al) Alloy by Direct Reduction of Titanium-bearing Extracted Vanadium Tailings with Al-Si alloy[J]. The Chinese Journal of Process Engineering, 2017 , 17(3) : 578 -583 . DOI: 10.12034/j.issn.1009-606X.216333

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