Isothermal reduction kinetics and mineral phase of chromium-bearing vanadium-titanium sinter reduced with CO gas at 873-1273 K
查看参考文献23篇
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文摘
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Reduction of chromium-bearing vanadium-titanium sinter (CVTS) was studied under simulated conditions of a blast furnace, and thermodynamics and kinetics were theoretically analyzed. Reduction kinetics of CVTS at different temperatures was evaluated using a shrinking unreacted core model. The microstructure, mineral phase, and variation of the sinter during reduction were observed by X-ray diffraction, scanning electron microscopy, and metallographic microscopy. Results indicate that porosity of CVTS increased with temperature. Meanwhile, the reduction degree of the sinter improved with the reduction rate. Reduction of the sinter was controlled by a chemical reaction at the initial stage and inner diffusion at the final stage. Activation energies measured 29.22-99.69 kJ/mol. Phase transformations in CVTS reduction are as follows: Fe_2O_3→Fe_3O_4→FeO→Fe; Fe_2TiO_5→Fe_2TiO_4→FeTiO_3; FeO V_2O_3→V_2O_3; FeO·Cr_2O_3→Cr_2O_3. |
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来源
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International Journal of Minerals
, Metallurgy and Materials,2018,25(2):145-152 【核心库】
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DOI
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10.1007/s12613-018-1557-z
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关键词
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sinter
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kinetics
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reduction
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mineral phase
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地址
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1.
School of Metallurgy, Northeastern University, Shenyang, 110819
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School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan, 114051
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Key Laboratory of Liaoning Province for Recycling Science of Metallurgical Resources, Key Laboratory of Liaoning Province for Recycling Science of Metallurgical Resources, Shenyang, 110819
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语种
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英文 |
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文献类型
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研究性论文 |
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ISSN
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1674-4799 |
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学科
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冶金工业 |
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基金
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国家自然科学基金
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the Fundamental Funds for the Central Universities
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辽宁省自然科学基金
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中国博士后科学基金
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the NEU Postdoctoral Science Foundation
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文献收藏号
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CSCD:6196403
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