硅铝合金还原含钛提钒尾渣制备Ti-Si-(Al)合金

孙路恩 马文会 雷云

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

过程工程学报 >

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

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

过程与工艺

硅铝合金还原含钛提钒尾渣制备Ti-Si-(Al)合金

孙路恩马文会雷云

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昆明理工大学冶金与能源工程学院，真空冶金国家工程实验室，云南昆明 650093

收稿日期: 2016-10-26

修回日期: 2016-11-27

网络出版日期: 2017-06-14

基金资助

基于Al-Si合金精炼硅技术的微量金属添加剂对硼的捕获行为及其热力学研究

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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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摘要

以含钛提钒尾渣为原料、铝硅合金为还原剂，于管式电阻炉内氩气气氛下制备Ti-Si-(Al)合金，研究了保温时间、还原剂成分、助溶剂添加量对钛回收率的影响及随还原剂成分变化所制合金中含钛物相的转变规律. 结果表明，在温度1550℃、渣金质量比3:1时，最优还原条件为保温时间2 h、还原剂成分Si-70% Al、助溶剂(CaO)添加量45%，该条件下钛回收率最大，为89.23%，此时合金中钛含量为42.32%, 渣中TiO₂含量由28.8%降至2.2%；随还原剂中铝含量增加，所制合金中含钛物相的主要变化为TiSi₂→Ti₇Al₅Si₁₂→(TiAl₃, Ti₅Si₃).

关键词： 含钛提钒尾渣; Ti-Si-（Al）合金; 回收率

本文引用格式

孙路恩马文会雷云 . 硅铝合金还原含钛提钒尾渣制备Ti-Si-(Al)合金[J]. 过程工程学报, 2017 , 17(3) : 578 -583 . DOI: 10.12034/j.issn.1009-606X.216333

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

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