Tetsu-to-Hagane
Online ISSN : 1883-2954
Print ISSN : 0021-1575
ISSN-L : 0021-1575
Swelling Behavior of the Iron Ore Pellets with Lime Stone during Reduction
Takeshi SUGIYAMAYoshio KIMURAOsamu TSUCHIYAReiziro NISHIDA
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1986 Volume 72 Issue 15 Pages 2016-2023

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Abstract

The swelling of the Brazillian are pellets during reduction is examined. In the sample pellets CaO/SiO2ratio and the amounts of CaO+SiO2 are controlled from 0 to 1.5, 0.3 to 12 wt% respectively.
(1) The swelling ratio becomes less than 10 vol% at the reduction degree of 30% by using the pellets in which CaO/SiO2 is more than unity and CaO+SiO2 is more than 8 wt%.
(2) The volume of slag phase in pellets decreases during reduction. The hematite phase swells, due to the producing conditions.
(3) The higher the reduction temperature rises, the more the metallic iron swells in the beginningand afterwards the more rapidly it shrinks.

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© The Iron and Steel Institute of Japan
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