ISIJ International
Online ISSN : 1347-5460
Print ISSN : 0915-1559
ISSN-L : 0915-1559
Ironmaking
Effects of the Bulk Fe2O3 Concentration on the Controlled Solidification of “Fe2O3”–CaO–SiO2 Liquids in Air
Stuart Nicol Evgueni JakPeter Hayes
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2020 Volume 60 Issue 5 Pages 876-886

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Abstract

The solidification of “Fe2O3”–CaO–SiO2 liquids in air at a controlled cooling rate of 2.0 K/s for a range of Fe2O3 concentrations in the bulk has been investigated. The compositions investigated were selected such that the bulk compositions were within the hematite primary phase field and had a CaO/SiO2 ratio of 3.46 wt/wt.

Non-equilibrium phase assemblages were formed for all bulk compositions investigated. Specifically, the silico ferrite of calcium (SFC) phase was not formed on cooling. The microstructures and proportions of the phase assemblages formed were found to vary with the Fe2O3 concentration in the bulk.

Schematic diagram of the experimental apparatus for the controlled cooling of oxide liquids. Reproduced from Nicol. Fullsize Image
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© 2020 by The Iron and Steel Institute of Japan
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