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熔鹽中電解鈦鐵礦制備TiFe合金
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國家自然科學(xué)基金(50434030)；國家重點(diǎn)基礎(chǔ)研究發(fā)展計(jì)劃(2007CB613801)


Preparation of TiFe Alloy by Ilmenite Electrolysis in Molten Salt
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國家“973”計(jì)劃(2006CB601005)；國家“863”計(jì)劃(2007AA03Z242)；國家自然科學(xué)基金(50771003)；北京市自然科學(xué)基金(2072004，2092006)

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    摘要:

    通過在CaCl2熔鹽中電解鈦鐵礦制備TiFe合金，研究了熔鹽電解鈦鐵礦的反應(yīng)過程，分析了電解產(chǎn)物的成分及電解效率。結(jié)果顯示，鈦鐵礦的還原經(jīng)歷了優(yōu)先生成Fe到逐步形成TiFe2、TiFe的合金化歷程，中間產(chǎn)物包括 CaTiO3、Fe2TiO4、TiO。反應(yīng)最先生成的合金是TiFe2合金，通過Ti和TiFe2的互擴(kuò)散最終轉(zhuǎn)變成TiFe合金, 說明擴(kuò)散是反應(yīng)的控制步驟。相同電解條件下，鈦鐵礦較混合氧化物難電解。這是由于鈦鐵礦顆粒較大，其雜質(zhì)是固溶到鈦酸鐵中的，脫氧更難，電解效率較低

    Abstract:

    TiFe alloys were prepared by ilmenite electrolysis in CaCl2 molten salt, and the reaction progress of the electrolysis was investigated. The composition of the electrolytic products and the electrolytic efficiency were analyzed. Results show that the reduction of ilmenite undergoes an alloying course of prior formation of Fe and gradual formation of TiFe2 and TiFe. The in-process products include CaTiO3, Fe2TiO4 and TiO. The alloy firstly formed in the reaction is TiFe2, and then it converts into TiFe alloy by the interdiffusion between Ti and TiFe2, indicating the diffusion is a control step of the reaction. Under the same electrolysis condition, ilmenite is more difficult to electrolyze than the mixed oxides. It is because that those ilmenite particles are big and the impurity is solid solutioned into the iron titanate, so deoxygenation is more difficult and the electrolytic efficiency is much lower

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杜繼紅,李晴宇,楊升紅,楊承本,李爭顯,奚正平.熔鹽中電解鈦鐵礦制備TiFe合金[J].稀有金屬材料與工程,2010,39(12):2247~2250.[Du Jihong, Li Qingyu, Yang Shenghong, Yang Chengben, Li Zhengxian, Xi Zhengping. Preparation of TiFe Alloy by Ilmenite Electrolysis in Molten Salt[J]. Rare Metal Materials and Engineering,2010,39(12):2247~2250.]
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  • 收稿日期:2010-07-16
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