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non-isothermal reduction process analysis of iron-bearing burden with charging iron coke hot briquette under simulated blast furnace conditions

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Journal of Iron and Steel Research International 2022年第5期29卷 741-750页

作者： Hong-tao Wang Man-sheng Chu Ji-wei Bao Zheng-gen Liu Hong-ming Long School of Metallurgy Engineering Anhui University of TechnologyMa’anshan243032AnhuiChina State Key Laboratory of Rolling and Automation Northeastern UniversityShenyang110819LiaoningChina School of Metallurgy Northeastern UniversityShenyang110819LiaoningChina Key Laboratory of Metallurgical Emission reduction&Resources Recycling Anhui University of TechnologyMinistry of EducationMa’anshan243032AnhuiChina

Highly reactive iron coke hot briquette(ICHB)prepared by carbonizing the agglomerate of iron-bearing substance and blended coals is regarded as an alternative fuel to mitigate carbon emission and energy consumption of blast ***,the reduction process of iron-bearing burden is extremely crucial for blast furnace *** effects of ICHB on the non-isothermal reduction process of iron-bearing burden with different reduction properties were thus experimentally studied under the conditions of simulated blast furnace lump zone(below 1100°C),and the related mechanism was discussed and *** results showed that the non-isothermal reduction process of iron-bearing burden is promoted by adding *** the charging ratio of ICHB is increased from 0%to 30%,the reduction degree of pellet is increased from 22.91%to 36.62%,but the increased amplitude is leveled ***,the reduction degree of sinter is raised from 35.10%to 93.33%.It is also indicated that the promotion effect of ICHB on the non-isothermal reduction of iron-bearing burden depends on the reduction property of *** with the burden with poor reduction performance(such as pellet 1),the promotion is more significant for the burden with good reduction property(such as sinter 1)since the reduction reaction of iron oxide in iron-bearing burden and the gasification of carbon in ICHB are remarkably reinforced each *** practical application of ICHB in blast furnace should be utilized with highly reductive iron-bearing burden.

关键词： Iron coke hot briquette non-isothermal reduction Iron-bearing burden Low carbon emission Blast furnace

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