| Isothermal reduction kinetics and mineral phase of chromium-bearing vanadium-titanium sinter reduced with CO gas at 873-1273 K |
| |
| 引用本文： | Song-tao Yang,Mi Zhou,Tao Jiang,Xiang-xin Xue. Isothermal reduction kinetics and mineral phase of chromium-bearing vanadium-titanium sinter reduced with CO gas at 873-1273 K[J]. 矿物冶金与材料学报, 2018, 25(2): 145-152. DOI: 10.1007/s12613-018-1557-z |
| |
| 作者姓名： | Song-tao Yang Mi Zhou Tao Jiang Xiang-xin Xue |
| |
| 作者单位： | School of Metallurgy, Northeastern University, Shenyang 110819, China |
| |
| 基金项目： | This work was financially supported by the National Nat-ural Science Foundation of China，the Fundamental Funds for the Central Universi-ties，the Natural Science Foundation of Liaoning Province，the China Postdoctoral Science Foundation，the NEU Postdoctoral Science Foundation |
| |
| 摘 要： | 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:Fe2O3→Fe3O4→FeO→Fe; Fe2TiO5→Fe2TiO4→FeTiO3; FeO·V2O3→V2O3; FeO·Cr2O3→Cr2O3.
|
| 关 键 词： | sinter kinetics reduction mineral phase |
Isothermal reduction kinetics and mineral phase of chromium-bearing vanadium–titanium sinter reduced with CO gas at 873–1273 K |
| |
| Song-tao Yang,Mi Zhou,Tao Jiang,Xiang-xin Xue. Isothermal reduction kinetics and mineral phase of chromium-bearing vanadium–titanium sinter reduced with CO gas at 873–1273 K[J]. International Journal of Minerals,Metallurgy and Materials, 2018, 25(2): 145-152. DOI: 10.1007/s12613-018-1557-z |
| |
| Authors: | Song-tao Yang Mi Zhou Tao Jiang Xiang-xin Xue |
| |
| Affiliation: | 1.School of Metallurgy,Northeastern University,Shenyang,China;2.School of Materials and Metallurgy,University of Science and Technology Liaoning,Anshan,China;3.Key Laboratory of Liaoning Province for Recycling Science of Metallurgical Resources,Shenyang,China |
| |
| Abstract: | 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 dif-fraction, 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: Fe2O3→Fe3O4→FeO→Fe; Fe2TiO5→Fe2TiO4→FeTiO3; FeO·V2O3→V2O3; FeO·Cr2O3→Cr2O3. |
| |
| Keywords: | |
| 本文献已被 万方数据 SpringerLink 等数据库收录！ |
| 点击此处可从《矿物冶金与材料学报》浏览原始摘要信息 |
|
点击此处可从《矿物冶金与材料学报》下载免费的PDF全文 |
