Reduction behavior and kinetics of vanadium–titanium sinters under high potential oxygen enriched pulverized coal injection
来源期刊：International Journal of Minerals Metallurgy and Materials2017年第5期
论文作者：Jin-fang Ma Guang-wei Wang Jian-liang Zhang Xin-yu Li Zheng-jian Liu Ke-xin Jiao Jian Guo
文章页码：493 - 503
摘 要：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.
Jin-fang Ma1，Guang-wei Wang1，Jian-liang Zhang1，Xin-yu Li2，Zheng-jian Liu1，Ke-xin Jiao1，Jian Guo1
1. School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing2. Plans and Operations Department,Wanbao Mining Ltd.
摘 要：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.
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