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Reduction mechanism of high-chromium vanadium–titanium magnetite pellets by H2–CO–CO2 gas mixtures

ISSN号：1006-706X
期刊名称：《钢铁研究学报：英文版》
时间：0
分类：TF046[冶金工程—冶金物理化学] TD951.1[矿业工程—选矿]
作者机构：[1]School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China
相关基金：Acknowledgements The authors are grateful to the National High Technology Research and Development Program of China （Nos. 2012AA062302 and 2012AA062304）, the Program of the National Natural Science Foundation of China （Nos. 51090384 and 51174051）, and The International Cooperation of the Ministry of Science and Technology of China （No. 2012DFR60210） for support of this research. We would also like to thank Professor Xing-min Guo, University of Science and Technology Beijing, for his help in the petrology of mineral experiments.

作者： Jue Tang Man-sheng Chu Feng Li Ya-ting Tang Zheng-gen Liu Xiang-xin Xue[1]

关键词：钒钛磁铁矿, 烧结行为, 固结机理, 高铬, 垂直烧结速度, 混合造粒, 流体状态, 混合料水分, magnetite, chromium, vanadium, titanium, ore sintering, consolidation, mineralogy

中文摘要：

为了完成高铬的 vanadiumtitanium 磁铁矿(VTiCr ) 的高效率利用，罚款， VTiCr 罚款的调查用一个泉华壶被进行。VTiCr 混合物的化学作文，粒子参数，和使成粒状被分析，并且 sintering 行为上的 sintering 参数的效果被调查。结果显示最佳生石灰剂量，混合潮湿，弄湿的时间，和 VTiCr 罚款的使成粒状时间分别地是 5wt% ， 7.5wt% ， 10 min，和 58 min。同时，垂直 sintering 速度，收益，杯力量，和生产率获得被显示是 21.28 mm/min， 60.50wt% ， 58.26wt% ，和 1.36 t 吗？

英文摘要：

To achieve high efficiency utilization of high-chromium vanadium-titanium magnetite （V-Ti-Cr） fines, an investigation of V Ti42r fines was conducted using a sinter pot. The chemical composition, particle parameters, and granulation of V-Ti-Cr mixtures were analyzed, and the effects of sintering parameters on the sintering behaviors were investigated. The results indicated that the optimum quicklime dosage, mixture moisture, wetting time, and granulation time for V-Ti-Cr fines are 5wt%, 7.5wt%, 10 min, and 5-8 min, respectively. Meanwhile, the vertical sintering speed, yield, tumbler strength, and productivity gains were shown to be 21.28 mm/min, 60.50wt% , 58.26wt%, and 1.36 t·m^-2·h^-1, respectively. Furthermore, the consolidation mechanism of V-Ti-Cr fines was clarified, revealing that the consolidation of a V-Ti-Cr sinter requires an approximately 14vo1% calcium ferrite liquid-state, an approximately 15vo1% silicate liq- uid-state, a solid-state reaction, and the recrystallization of magnetite. Compared to an ordinary sinter, calcium ferrite content in a V-Ti-Cr sinter is lower, while the perovskite content is higher, possibly resulting in unsatisfactory sinter outcomes.

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