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Title of Journal: Int J Miner Metall Mater

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Abbravation: International Journal of Minerals, Metallurgy, and Materials

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Springer Berlin Heidelberg

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DOI

10.1016/0165-7992(93)90040-3

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ISSN

1869-103X

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Numerical simulation of the direct reduction of pe

Authors: Yuliang Wu Zeyi Jiang Xinxin Zhang Peng Wang Xuefeng She
Publish Date: 2013/07/07
Volume: 20, Issue: 7, Pages: 636-644
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Abstract

A mathematical model was established to describe the direct reduction of pellets in a rotary hearth furnace RHF In the model heat transfer mass transfer and gassolid chemical reactions were taken into account The behaviors of iron metallization and dezincification were analyzed by the numerical method which was validated by experimental data of the direct reduction of pellets in a SiMo furnace The simulation results show that if the production targets of iron metallization and dezincification are up to 80 and 90 respectively the furnace temperature for hightemperature sections must be set higher than 1300°C Moreover an undersupply of secondary air by 20 will lead to a decline in iron metallization rate of discharged pellets by 10 and a decrease in dezincing rate by 13 In addition if the residence time of pellets in the furnace is over 20 min its further extension will hardly lead to an obvious increase in production indexes under the same furnace temperature curve

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