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Title of Journal: J Cent South Univ

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Abbravation: Journal of Central South University

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Central South University

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DOI

10.1016/0040-6090(79)90323-7

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2227-5223

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Influences of hydrogenenriched atmosphere under c

Authors: Hongming Long Hongtao Wang Zhanxia Di Tiejun Chun Zhenggen Liu
Publish Date: 2016/10/27
Volume: 23, Issue: 8, Pages: 1890-1898
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Abstract

It is of great importance to elucidate reduction swelling behaviors and reaction mechanism of oxidized pellet in hydrogenenriched atmosphere under coke oven gas injection In this work the effects of hydrogen concentration in N2COH2 atmosphere with unchanged CO content on reduction swelling behaviors of oxidized pellet at 1173 K were studied to clarify the mechanism of hydrogenenriched reduction and exclude the influences of CO Then the reduction swelling behaviors of oxidized pellet at 1173 K in actual atmosphere under coke oven gas COG injection got from the simulation results of multifluid blast furnace model were investigated The results show that with the concentration of hydrogen increasing in N2COH2 gas from 2 to 18 the reduction swelling index of pellet decreases from 1012 to 557 while the reduction ratio of pellet increases obviously from 3985 to 6958 In addition with COG injection rate increasing from 0 to 15234 m3/t the reduction swelling index of pellet decreases slightly from 1071 to 954 while the reduction ratio of pellet is increased from 3157 to 3639 The microstructures of pellet are transformed from the platy structure to the flocculent structure

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