| 浓硫酸焙烧高钛渣的反应动力学（英文） |
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| 引用本文： | 隋丽丽,翟玉春. 浓硫酸焙烧高钛渣的反应动力学（英文）[J]. 中国有色金属学会会刊, 2014, 24(3): 848-853. DOI: 10.1016/S1003-6326(14)63134-4 |
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| 作者姓名： | 隋丽丽 翟玉春 |
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| 作者单位： | [1]东北大学材料与冶金学院,沈阳110819 [2]沈阳医学院化学系,沈阳110034 |
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| 基金项目： | Project(2007CB613603)supported by the National Basic Research Program of China |
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| 摘 要： | 提出一种新方法,利用浓硫酸焙烧高钛渣提取二氧化钛,并在焙烧工艺的基础上研究焙烧反应动力学。考察焙烧温度、粒度以及酸矿比对反应速率的影响。结果表明,焙烧反应符合未反应核收缩模型。动力学实验数据、SEM和EDAX结果分析表明,用浓硫酸焙烧高钛矿渣的反应受通过固体产物层的内扩散控制。Arrhenius方程得到焙烧反应的表观活化能为18.94 kJ/mol。
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| 关 键 词： | 焙烧动力学 高钛渣 浓硫酸 二氧化钛 |
| 收稿时间： | 2013-04-27 |
Reaction kinetics of roasting high-titanium slag with concentrated sulfuric acid |
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| Li-li SUI,Yu-chun ZHAI. Reaction kinetics of roasting high-titanium slag with concentrated sulfuric acid[J]. Transactions of Nonferrous Metals Society of China, 2014, 24(3): 848-853. DOI: 10.1016/S1003-6326(14)63134-4 |
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| Authors: | Li-li SUI Yu-chun ZHAI |
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| Affiliation: | 1. School of Materials and Metallurgy, Northeastem University, Shenyang 110819, China; 2. Department of Chemistry, Shenyang Medical College, Shenyang 110034, China) |
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| Abstract: | A novel method of roasting high-titanium slag with concentrated sulfuric acid was proposed to prepare titanium dioxide, and the roasting kinetics of titania was studied On the basis of roasting process. The effects of roasting temperature, particle size, and acid-to-ore mass ratio on the rate of roasting reaction were investigated. The results showed that the roasting reaction is fitted to a shrinking core model. The results of the kinetic experiment and SEM and EDAX analyses proved that the reaction rate of roasting high-titanium slag with concentrated sulfuric acid is controlled by the internal diffusion on the solid product layer. According to the Arrhenius expression, the apparent activation energy of the roasting reaction is 18.94 kJ/mol. |
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| Keywords: | roasting kinetics high-titanium slag concentrated sulfuric acid titania |
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