Reduction Behavior of Sinter Based on Top Gas Recycling-Oxygen Blast Furnace

In order to explore the behavior laws of sinter reduction in TGR-OBF ( top gas recycling-oxygen blast furnace ), reduction experiments of sinter have been conducted by thermal balance mass loss method with different atmospheres , temperatures and volume flows.The changes of RI ( reduction degree of...

Full description

Saved in:
Bibliographic Details
Published in:Journal of iron and steel research, international international, 2012-09, Vol.19 (9), p.13-19
Main Authors: LAN, Rong-zong, WANG, Jing-song, HAN, Yi-hua, SHE, Xue-feng, WANG, Lin-tao, XUE, Qing-guo
Format: Article
Language:English
Subjects:
Applied and Technical Physics
Atmospheres
blast
Blast furnace gas
Blast furnaces
Carbon monoxide
Engineering
furnace
Iron and steel industry
Machines
Manufacturing
Materials Engineering
Materials Science
Metallic Materials
oxygen
oxygen blast furnace
Physical Chemistry
Processes
Reduction
Sinter
Steels
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:In order to explore the behavior laws of sinter reduction in TGR-OBF ( top gas recycling-oxygen blast furnace ), reduction experiments of sinter have been conducted by thermal balance mass loss method with different atmospheres , temperatures and volume flows.The changes of RI ( reduction degree of Fe 2 O 3 ), RI′ ( reduction rate of Fe 2 O 3 ) and r ( reduction degree of FeO ) have been examined.The results show that the reduction of sinter was significantly improved under TGR-OBF atmosphere , and the RIand r were measured up to 98.2%and 97.8%at 900℃ respectively.With increasing of the reduction temperature , the reduction of sinter speeded up greatly , and the reduction time-duration shortened from 117min at 900 ℃ to 63min at 1 100 ℃.Moreover , the reduction of sinter enhanced with increasing of the reductive gas flow.When the flow increased from 10to 15L / min , the initial reduction rate of sinter increased from 2.47% / min to 3.73% / min.While increasing H2and CO contents in the reductive atmosphere , the reduction of sinter was promoted.Besides , H 2 influenced more evidently than CO to the reduction of sinter , especially in the later stage of the reduction process , for instance , the reduction of wustite will be improved enormously when increasing the H2content in the reductive atmosphere.
ISSN:1006-706X
2210-3988
DOI:10.1016/S1006-706X(13)60003-5