Liquidus temperatures in the "Cu2O"-FeO-Fe2O3-CaO-SiO2 system at metallic copper saturation, at fixed oxygen partial pressures, and in equilibrium with spinel or dicalcium ferrite at1200 degrees C and 1250 degrees C

Nikolic, Stanko, Hayes, Peter C. and Jak, Evgueni (2009) Liquidus temperatures in the "Cu2O"-FeO-Fe2O3-CaO-SiO2 system at metallic copper saturation, at fixed oxygen partial pressures, and in equilibrium with spinel or dicalcium ferrite at1200 degrees C and 1250 degrees C. Metallurgical and Materials Transactions B, 40 6: 910-919. doi:10.1007/s11663-009-9295-2


Author Nikolic, Stanko
Hayes, Peter C.
Jak, Evgueni
Title Liquidus temperatures in the "Cu2O"-FeO-Fe2O3-CaO-SiO2 system at metallic copper saturation, at fixed oxygen partial pressures, and in equilibrium with spinel or dicalcium ferrite at1200 degrees C and 1250 degrees C
Formatted title
Liquidus temperatures in the “Cu2O”-FeO-Fe2O3-CaO-SiO2 system at metallic copper saturation, at fixed oxygen partial pressures, and in equilibrium with spinel or dicalcium ferrite at 1200 °C and 1250 °C
Journal name Metallurgical and Materials Transactions B   Check publisher's open access policy
ISSN 1073-5615
1543-1916
Publication date 2009-12-01
Year available 2009
Sub-type Article (original research)
DOI 10.1007/s11663-009-9295-2
Volume 40
Issue 6
Start page 910
End page 919
Total pages 10
Editor D. E. Laughlin
Place of publication New York, NY, U.S.A.
Publisher Springer Sciences and Business Media
Language eng
Subject C1
091407 Pyrometallurgy
840202 Mining and Extraction of Copper Ores
Formatted abstract
Calcium ferrite slags, which are represented by the “Cu 2O”-FeO-Fe2O3-CaO system at copper saturation, have been applied successfully to existing copper-converting processes. Because of the industrial importance of this system, the characterization of the effects of oxygen partial pressure and silica on the phase equilibria is necessary to improve the control of process parameters, which include fluxing and operating temperatures. In the current study, experimental methods, which use the equilibration/quenching/electron probe X-ray microanalysis (EPMA) techniques with primary phase substrate support, were subsequently developed to incorporate fixed oxygen partial pressure experiments. Experiments were carried out at 1200 °C and 1250 °C both with and without silica additions; both liquidus and solidus data were reported for the primary phase field of spinel and dicalcium ferrite between the oxygen partial pressures of 10-5.0 and 10-6.5 atm. The analyzed compositions of the liquid and solid phases are used to construct the phase diagram of the pseudoternary “Cu2O”-“Fe 2O3”-CaO system in equilibrium with metallic copper at fixed oxygen partial pressures and with additions of silica. The maximum solubility of silica within the liquid slag phase, prior to dicalcium silicate precipitation, was measured at specific conditions. Two empirical equations used for the calculation of the copper oxide concentration in calcium ferrite slag are evaluated with the new experimental data defined in the current study.
© 2009 The Minerals, Metals & Materials Society and ASM International.
Keyword Calcium silicate slags
Phase-equilibria
Liquidus
Liquidus temperature
Metallic copper
Operating temperature
Oxygen partial pressure
Primary phase field
Process parameters
Silica additions
Solid phasis
X-ray microanalysis
Liquid slags
Experimental methods
Experimental data
EPMA
Empirical equations
Dicalcium silicate
Converting process
Calcium ferrite slag
Q-Index Code C1
Q-Index Status Confirmed Code

Document type: Journal Article
Sub-type: Article (original research)
Collections: 2010 Higher Education Research Data Collection
School of Chemical Engineering Publications
 
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Created: Sun, 03 Jan 2010, 10:01:16 EST