3-10mass%?TiO3的960℃冰晶石介質(zhì)中進行鋁熱還原,研究還原劑用量和還原時間對合金產(chǎn)物的影響。還原產(chǎn)物經(jīng)XRF、XRD、SEM和EDS分析結(jié)果表明,合金產(chǎn)物中有Al、Ti、Fe和少量Si,產(chǎn)物的主要物相是Al3Ti。隨著鋁用量的增加,合金產(chǎn)物中Ti的含量逐漸減少,而鐵的含量逐漸增加；隨著反應時間的延長,產(chǎn)物中Al3Ti的含量增加。在冰晶石熔鹽體系中進行鋁熱還原2h、還原劑用量為理論用量3倍時,鋁中鈦含量最高可達18.82mass%。低還原劑用量和較長還原時間時,在冰晶石熔鹽介質(zhì)中還原鈦鐵礦,可實現(xiàn)Ti/Fe分離；還原反應為原子態(tài)的鋁還原溶解為離子態(tài)的Ti4+得到Al-Ti合金。"/>

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冰晶石熔鹽介質(zhì)中鋁熱還原月壤模擬樣鈦鐵礦
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東北大學材料與冶金學院,東北大學材料與冶金學院,東北大學材料與冶金學院,東北大學材料與冶金學院,東北大學材料與冶金學院,東北大學材料與冶金學院,東北大學材料與冶金學院

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TF651

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國家自然科學基金資助項目( 51322406)；教育部新世紀優(yōu)秀人才支持計劃(NCET-13-0107)。


Aluminothermic Reduction of lunar soil simulant Ilmenite in Cryolite Molten Salt Media
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School of Materials and Metallurgy,Northeastern University,School of Materials and Metallurgy,Northeastern University,School of Materials and Metallurgy,Northeastern University,School of Materials and Metallurgy,Northeastern University,School of Materials and Metallurgy,Northeastern University,School of Materials and Metallurgy,Northeastern University,School of Materials and Metallurgy,Northeastern University

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    摘要:

    以月球資源原位利用為目的,在冰晶石熔鹽介質(zhì)中研究鋁熱還原鈦鐵礦制備鋁鈦鐵合金。熱力學計算表明,在960℃,鋁熱還原鈦鐵礦的相關反應在熱力學上可以自發(fā)進行。在組成為47.14mass%NaF-42.86mass%AlF3-10mass%?TiO3的960℃冰晶石介質(zhì)中進行鋁熱還原,研究還原劑用量和還原時間對合金產(chǎn)物的影響。還原產(chǎn)物經(jīng)XRF、XRD、SEM和EDS分析結(jié)果表明,合金產(chǎn)物中有Al、Ti、Fe和少量Si,產(chǎn)物的主要物相是Al3Ti。隨著鋁用量的增加,合金產(chǎn)物中Ti的含量逐漸減少,而鐵的含量逐漸增加；隨著反應時間的延長,產(chǎn)物中Al3Ti的含量增加。在冰晶石熔鹽體系中進行鋁熱還原2h、還原劑用量為理論用量3倍時,鋁中鈦含量最高可達18.82mass%。低還原劑用量和較長還原時間時,在冰晶石熔鹽介質(zhì)中還原鈦鐵礦,可實現(xiàn)Ti/Fe分離；還原反應為原子態(tài)的鋁還原溶解為離子態(tài)的Ti4+得到Al-Ti合金。

    Abstract:

    Focused on in-situ utilization of lunar resources, we studied the preparation of aluminum alloy by aluminothermic reduction of ilmenite in molten cryolite media. The standard Gibbs free energy change of aluminothermic reduction of ilmenite are negative at temperature range 0-1500℃. The effects of reductant amount and reaction time on the aluminothermic reduction of ilmenite in 47.14mass%NaF-42.86mass%AlF3-10mass%?TiO3 at 960℃ were studied. The results obtained by XRF, XRD, SEM and EDS analysis show that the products mainly contain Al, Ti, Fe, and little Si, and the main phase of the product is Al3Ti. With the increase of reductant amount, the content of Ti in alloy products decreases, while the content of Fe in alloy products increases. In addition, the content of Al3Ti increases with the increase of reaction time. The highest content of Ti in the alloy obtained by aluminothermic reaction for 2h at 960℃ using three times reductant amount of theoretical amount is up to 18.82 mass%. Fe and Ti can be separated when FeTiO3 aluminothermic reduction was carried using lower reductant amount and higher reduction time. The FeTiO3 aluminothermic reduction reaction takes place between the dissolved Al atom and dissolved FeTiO3 in the Cryolite melt.

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謝開鈺,關蘋蘋,劉愛民,石忠寧,胡憲偉,高炳亮,王兆文.冰晶石熔鹽介質(zhì)中鋁熱還原月壤模擬樣鈦鐵礦[J].稀有金屬材料與工程,2016,45(5):1278~1283.[Xie Kaiyu, Guan Pingping, Liu Aimin, Shi Zhongning, Hu Xianwei, Gao Bingliang, Wang Zhaowen. Aluminothermic Reduction of lunar soil simulant Ilmenite in Cryolite Molten Salt Media[J]. Rare Metal Materials and Engineering,2016,45(5):1278~1283.]
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  • 收稿日期:2014-12-31
  • 最后修改日期:2015-03-30
  • 錄用日期:2015-05-13
  • 在線發(fā)布日期: 2016-06-02
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