Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
Behaviors of Pellets and Sinter in the Cohesive Zone of Blast Furnace
Kiichi NARITAMasahiro MAEKAWAHiroshi KANAYAMA
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1980 Volume 66 Issue 13 Pages 1860-1869

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Abstract

An investigation has been carried out into physical and chemical behaviors of sinter and pellets taken from the cohesive zone of Amagasaki No. 1 BF.
The results obtained are summarized as follows :
1) The cohesion of burden materials in the early stage takes place by sintering of M·Fe particles formed on their surfaces.
2) Wustite remaining mainly in central part of pellets melts at 1 350° 400°C and exudes to the outside.
3) Sinter tends to have higher values of reduction degree, alkali and S contents than pellets because of the easier contact with ascending gas.
4) Alkali content in burden materials becomes higher with the progress of cohesion and kalsilite is formed in slag phase. Furthermore, glassy silicate as the main slag phase in lumpy ore contains a large amount of alkali.
5) With the progress of reduction of wustite to M·Fe, MgO content in residual wustite becomes higher and a part of MgO forms merwinite in slag phase.

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© The Iron and Steel Institute of Japan
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