| 真空下从铝土矿中直接提取铝的研究 |
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| 引用本文： | 李秋霞,杨斌,戴永年. 真空下从铝土矿中直接提取铝的研究[J]. 真空科学与技术学报, 2010, 30(2). DOI: 10.3969/j.issn.1672-7126.2010.02.20 |
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| 作者姓名： | 李秋霞 杨斌 戴永年 |
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| 作者单位： | 1. 云南师范大学化学化工学院,昆明,650092;昆明理工大学真空冶金研究所,昆明,650093
2. 昆明理工大学真空冶金研究所,昆明,650093 |
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| 基金项目： | 国家973计划前期研究专项，国家自然科学基金-云南省联合资助基金项目 |
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| 摘 要： | 利用低价铝氟化物歧化反应分解可以得到金属铝的特性,用焦炭作还原剂,在真空条件下,从铝土矿中提取铝进行了实验研究。实验得到:残余压力300Pa以下时可以得到金属铝,温度在1300～1550℃范围内都可以得到金属铝。氧化铝的还原率随反应温度的升高而升高,当温度达1400℃时还原率达80%以上,当温度达1450℃时还原率超过81%。冷凝温度在700～830℃区间,金属铝颗粒直径达3～4mm。此工艺也可以用于从低品位含氧化铝原料中直接提取金属铝。
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| 关 键 词： | 铝冶金 真空 铝土矿 低价氟化物 歧化反应 |
Experimental Study of Vacuum Aluminum Extraction from Bauxite |
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| Li Qiuxia,Yang Bin,Dai Yongnian. Experimental Study of Vacuum Aluminum Extraction from Bauxite[J]. JOurnal of Vacuum Science and Technology, 2010, 30(2). DOI: 10.3969/j.issn.1672-7126.2010.02.20 |
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| Authors: | Li Qiuxia Yang Bin Dai Yongnian |
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| Affiliation: | Li Qiuxia1,2,Yang Bin2,Dai Yongnian2(1.Chemistry , Chemical Engineering College of Yunnan Normal University,Kunming 650092,China,2.Institute of Vacuum Metallurgy , Material Kunming University of Science , Technology,Kunming 650093,China) |
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| Abstract: | A novel technique has been successfully developed to directly extract aluminum from bauxite in vacuum by means of the disproportionating reaction of sub-fluoride of aluminum,with coke as the reduction reagent.The impacts of the experimental conditions,including the heating and condensing temperatures,and residue pressure,on aluminum extraction were experimentally studied.The results show that at a residue pressure of 300Pa,metallic Al can be extracted at a temperature ranging from 1300～1550℃.As the heating temperature rises up,the reduction increases,reaching 80% at 1400℃ and over 81% at 1450℃,respectively.And the Al grain size was found to be about 3～4mm at a condensing temperature of 700～830℃. |
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| Keywords: | Aluminum metallurgy Vacuum Bauxite Sub-fluoride Disproportion |
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