Reduction behavior and kinetics of vanadium-titanium sinters under high potential oxygen enriched pulverized coal injection

Jin-fang Ma; Guang-wei Wang; Jian-liang Zhang; Xin-yu Li; Zheng-jian Liu; Ke-xin Jiao; Jian Guo

doi:10.1007/s12613-017-1430-5

Volume 24 Issue 5

May 2017

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Article Navigation > International Journal of Minerals, Metallurgy and Materials > 2017 > 24(5): 493-503

Jin-fang Ma, Guang-wei Wang, Jian-liang Zhang, Xin-yu Li, Zheng-jian Liu, Ke-xin Jiao, and Jian Guo, Reduction behavior and kinetics of vanadium-titanium sinters under high potential oxygen enriched pulverized coal injection, Int. J. Miner. Metall. Mater., 24(2017), No. 5, pp. 493-503. https://doi.org/10.1007/s12613-017-1430-5

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Jin-fang Ma, Guang-wei Wang, Jian-liang Zhang, Xin-yu Li, Zheng-jian Liu, Ke-xin Jiao, and Jian Guo, Reduction behavior and kinetics of vanadium-titanium sinters under high potential oxygen enriched pulverized coal injection, Int. J. Miner. Metall. Mater., 24(2017), No. 5, pp. 493-503. https://doi.org/10.1007/s12613-017-1430-5

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Reduction behavior and kinetics of vanadium-titanium sinters under high potential oxygen enriched pulverized coal injection

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Corresponding author:
Guang-wei Wang E-mail: wgw676@163.com
Received: 19 August 2016; Revised: 23 December 2016; Accepted: 26 December 2016

Abstract

Abstract

In this work, the reduction behavior of vanadium-titanium sinters was studied under five different sets of conditions of pulverized coal injection with oxygen enrichment. The modified random pore model was established to analyze the reduction kinetics. The results show that the reduction rate of sinters was accelerated by an increase of CO and H₂ contents. Meanwhile, with the increase in CO and H₂ contents, the increasing range of the medium reduction index (MRE) of sinters decreased. The increasing oxygen enrichment ratio played a diminishing role in improving the reduction behavior of the sinters. The reducing process kinetic parameters were solved using the modified random role model. The results indicated that, with increasing oxygen enrichment, the contents of CO and H₂ in the reducing gas increased. The reduction activation energy of the sinters decreased to between 20.4 and 23.2 kJ/mol.
- ore reduction;
- sintering;
- oxygen enrichment;
- pulverized coal;
- injection;
- kinetic models

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