Mathematical simulation of direct reduction process in zinc-bearing pellets
来源期刊：International Journal of Minerals Metallurgy and Materials2013年第11期
论文作者：Ying Liu 杨进规 Zhi Wen Zhi Li Hai-quan Yong Xiao-hong Feng
文章页码：1042 - 1049
摘 要：A one-dimensional unsteady mathematical model was established to describe direct reduction in a composite pellet made of metallurgical dust.The model considered heat transfer,mass transfer,and chemical reactions including iron oxide reductions,zinc oxide reduction and carbon gasifcation,and it was numerically solved by the tridiagonal matrix algorithm（TDMA）.In order to verify the model,an experiment was performed,in which the profles of temperature and zinc removal rate were measured during the reduction process.Results calculated by the mathematical model were in fairly good agreement with experimental data.Finally,the efects of furnace temperature,pellet size,and carbon content were investigated by model calculations.It is found that the pellet temperature curve can be divided into four parts according to heating rate.Also,the zinc removal rate increases with the increase of furnace temperature and the decrease of pellet size,and carbon content in the pellet has little influence on the zinc removal rate.
Ying Liu1，Fu-yong Su1，Zhi Wen1，Zhi Li2，Hai-quan Yong2，Xiao-hong Feng2
1. School of Mechanical Engineering,University of Science and Technology Beijing2. CISDI Industrial Furnace Co.Ltd.
摘 要：A one-dimensional unsteady mathematical model was established to describe direct reduction in a composite pellet made of metallurgical dust.The model considered heat transfer,mass transfer,and chemical reactions including iron oxide reductions,zinc oxide reduction and carbon gasifcation,and it was numerically solved by the tridiagonal matrix algorithm（TDMA）.In order to verify the model,an experiment was performed,in which the profles of temperature and zinc removal rate were measured during the reduction process.Results calculated by the mathematical model were in fairly good agreement with experimental data.Finally,the efects of furnace temperature,pellet size,and carbon content were investigated by model calculations.It is found that the pellet temperature curve can be divided into four parts according to heating rate.Also,the zinc removal rate increases with the increase of furnace temperature and the decrease of pellet size,and carbon content in the pellet has little influence on the zinc removal rate.
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