Phase equilibria in ferrous calcium silicate slags: Part I. Intermediate oxygen partial pressures in the temperature range 1200 °C to 1350 °C

Nikolic, Stanko, Hayes, Peter C. and Jak, Evgueni (2008) Phase equilibria in ferrous calcium silicate slags: Part I. Intermediate oxygen partial pressures in the temperature range 1200 °C to 1350 °C. Metallurgical and Materials Transactions B, 39 2: 179-188. doi:10.1007/s11663-008-9130-1


Author Nikolic, Stanko
Hayes, Peter C.
Jak, Evgueni
Title Phase equilibria in ferrous calcium silicate slags: Part I. Intermediate oxygen partial pressures in the temperature range 1200 °C to 1350 °C
Journal name Metallurgical and Materials Transactions B   Check publisher's open access policy
ISSN 1073-5615
1543-1916
Publication date 2008-04-01
Year available 2008
Sub-type Article (original research)
DOI 10.1007/s11663-008-9130-1
Open Access Status
Volume 39
Issue 2
Start page 179
End page 188
Total pages 10
Place of publication New York, U.S.A.
Publisher Springer New York LLC
Language eng
Subject C1
8502 Mining and Extraction of Energy Resources
0914 Resources Engineering and Extractive Metallurgy
0912 Materials Engineering
091407 Pyrometallurgy
Formatted abstract
Ferrous calcium silicate slags are used in primary and secondary metallurgical processes (described by the FeO-Fe2O3-CaO-SiO2 system). Despite the industrial and scientific importance of this system, the phase equilibria have not been fully investigated. Characterization of this slag system is necessary to improve the design and optimization of new and existing metallurgical processes, particularly in relation to fluxing practice and operating temperatures. Experimental methods have been developed to investigate the phase equilibria of these slags involving the equilibration of samples at fixed oxygen partial pressures, rapid quenching, and the analysis of the compositions of solid and liquid phases using electron probe X-ray microanalysis (EPMA) with wavelength dispersive detectors. Liquidus and solidus data are reported for the primary phase fields of spinel, pseudo-wollastonite, and tridymite in the temperature range of 1200 °C to 1350 °C at an oxygen partial pressure of 10−6 atm, and at 1250 °C at an oxygen partial pressure of 10−5 atm. The resulting data have been used to construct liquidus and solidus isotherms in the “FeO”-CaO-SiO2 system directly relevant to industrial processes.
© The Minerals, Metals & Materials Society and ASM International 2008
Keyword Metallurgical processes
Partial pressure
Ferrous calcium silicate slags
Calcium silicate
Phase equilibrium
Q-Index Code C1
Q-Index Status Confirmed Code

 
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Created: Mon, 20 Apr 2009, 19:33:02 EST by Katherine Montagu on behalf of Mining and Minerals Process Engineering