Abstract
Phase equilibria of the Pb-Fe-Ca-O system have been investigated at 1043-1653 K (770-1380 °C) for oxide liquid in equilibrium with air and solid oxide phases: (a) hematite Fe2O3; (b) spinel (Fe,Ca)Fe2O4; (c) calcium ferrites CaFe4O7, CaFe2O4, Ca2Fe2O5; (d) lead ferrites (magnetoplumbite (Pb,Ca)O·12FeO1.5, plumboferrite (Pb,Ca)O·(5 + x)FeO1.5, 1:1 lead ferrite (Pb,Ca)O·(1 ± x)FeO1.5); (e) lead oxide PbO (massicot); (f) calcium plumbate Ca2PbO4; and (g) lime CaO. High-temperature equilibration on inert metal (platinum, gold) substrates, followed by quenching and direct measurement of Pb, Fe and Ca concentrations in the phases with the electron probe x-ray microanalysis (EPMA) has been used to accurately characterize the system in equilibrium with air. All results are projected onto the PbO-“FeO1.5”-CaO plane for presentation purposes. The present study is the first systematic characterization of liquidus over a wide range of compositions in this system in equilibrium with air.
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References
E. Jak, Phase Equilibria to Characterise Lead/Zinc Smelting Slags and Sinters (PbO-ZnO-CaO-SiO 2 -Fe 2 O 3 -FeO), Ph.D Thesis (University of Queensland, 1995)
E. Jak, S.A. Decterov, P. Wu, P.C. Hayes, and A.D. Pelton, Thermodynamic Optimisation of the Systems PbO-SiO2, PbO-ZnO, ZnO-SiO2 and PbO-ZnO-SiO2, Metall. Mater. Trans. B, 1997, 28B, p 1011-1018
E. Jak, S.A. Decterov, P.C. Hayes, and A.D. Pelton, Thermodynamic Optimisation of the Systems CaO-Pb-O and PbO-CaO-SiO2, Can. Metall. Q., 1998, 37(1), p 41-47
E. Jak, N. Liu, and P.C. Hayes, Experimental Study of Phase Equilibria in the Systems PbOx-CaO and PbOx-CaO-SiO2, Metall. Mater. Trans. B, 1998, 29B(3), p 541-553
E. Jak, B. Zhao, P.C. Hayes, S.A. Decterov, and A.D. Pelton, Coupled Experimental and Thermodynamic Modelling Studies of the System PbO-ZnO-FeO-Fe2O3-CaO-SiO2-Al2O3 for Lead and Zinc Smelting, Zinc and Lead Processing, in ed. by J.E. Dutrizac, J.A. Gonzalez, G.L. Bolton, P. Hancock 1998 of Conference, Met. Soc. CIMM, pp. 313–333
E. Jak, B. Zhao, N. Liu, and P.C. Hayes, Experimental Study of Phase Equilibria in the System PbO-ZnO-SiO2, Metall. Mater. Trans. B, 1999, 30B(1), p 21-27
E. Jak and P.C. Hayes, Experimental Study of Phase Equilibria in the PbO-ZnO-”Fe2O3”-CaO-SiO2 System in Air for High Lead Smelting Slags (CaO/SiO2 = 0.35 and PbO/(CaO + SiO2) = 5.0 by Weight), Metall. Mater. Trans. B, 2002, 33B(6), p 817-825
E. Jak and P.C. Hayes, Experimental Liquidus in the PbO-ZnO-”Fe2O3”-(CaO + SiO2) System in Air, with CaO/SiO2 = 0.35 and PbO/(CaO + SiO2) = 3.2, Metall. Mater. Trans. B, 2002, 33B(6), p 851-863
E. Jak and P.C. Hayes, The Effect of the CaO/SiO2 Ratio on the Phase Equilibria in the ZnO-”Fe2O3”-(PbO + CaO + SiO2) System in Air: CaO/SiO2 = 0.1, PbO/(CaO + SiO2) = 6.2, and CaO/SiO2 = 0.6, PbO/(CaO + SiO2) = 4.3, Metall. Mater. Trans. B, 2003, 34B(4), p 369-382
E. Jak, B. Zhao, I. Harvey, and P.C. Hayes, Experimental Study of Phase Equilibria in the PbO-ZnO-”Fe2O3”-(CaO + SiO2) System in Air for the Lead and Zinc Blast Furnace Sinters (CaO/SiO2 Weight Ratio of 0.933 and PbO/(CaO + SiO2) Ratios of 2.0 and 3.2), Metall. Mater. Trans. B, 2003, 34B(4), p 383-397
E. Jak, P.C. Hayes, and H.-G. Lee, Improved Methodologies for the Determination of High Temperature Phase Equilibria, Met. Mater., 1995, 1(1), p 1-8
M. Kudo, E. Jak, P.C. Hayes, K. Yamaguchi, and Y. Takeda, Lead Solubility in FeOx-CaO-SiO2 Slags at Iron Saturation, Metall. Mater. Trans. B, 2000, 31B(1), p 15-24
E. Jak, S.A. Decterov, P.C. Hayes, and A.D. Pelton, Thermodynamic Modelling of the System PbO-ZnO-FeO-Fe2O3-CaO-SiO2 for Zinc/Lead Smelting, in Proceedings of the 5th International Conference on Molten Slags, Fluxes and Salts Iron and Steel Society (AIME, Sydney, Australia, 1997), pp. 621–628
E. Jak, S.A. Decterov, B. Zhao, A.D. Pelton, and P.C. Hayes, Coupled Experimental and Thermodynamic Modelling Studies for Metallurgical Smelting and Coal Combustion Slag Systems, Metall. Mater. Trans. B, 2000, 31B(4), p 621-630
S.A. Decterov, I.-H. Jung, E. Jak, Y.-B. Kang, P. Hayes, and A.D. Pelton, Thermodynamic Modeling of the Al2O3-CaO-CoO-CrO-Cr2O3-FeO-Fe2O3-MgO-MnO-NiO-SiO2-S System and Applications in Ferrous Process Metallurgy, in ed. by C. Pistorius SAIMM Symposium Series S36 (VII International Conference on Molten Slags, Fluxes & Salts) (The South African Institute of Mining and Metallurgy, Johannesburg, Republic of South Africa, 2004), pp. 839–850
FactSage, Ecole Polytechnique, Montréal, http://www.factsage.com/, 2008
E. Jak, Integrated Experimental and Thermodynamic Modelling Research Methodology for Metallurgical Slags with Examples in the Copper Production Field 9th International Conference on Molten Slags, Fluxes and Salts (MOLTEN12), 2012 of Conference (Beijing, China), The Chinese Society for Metals, W077
K.T. Jacob, G. Rajitha, and G.M. Kale, Thermodynamic Properties of Pb2PtO4 and PbPt2O4 and Phase Equilibria in the System Pb-Pt-O, J. Alloys Compd., 2009, 481(1–2), p 228-232
H. Fukuyama, K. Shimizu, and K. Nagata, Determination of Gibbs Energies of Formation of the Ca-Pt-O Compounds from Electromotive Force Method Using CaF2 as Solid Electrolyte, High Temp. Mater. Process., 2004, 23(5–6), p 335-341
M. Shevchenko and E. Jak, Experimental Liquidus Study of the Binary PbO-CaO and Ternary PbO-CaO-SiO 2 Systems, Personal communication, PYROSEARCH (The University of Queensland, 2018)
S. Nikolic, P.C. Hayes, and E. Jak, Experimental Techniques for Investigating Calcium Ferrite Slags at Metallic Copper Saturation and Application to the Systems “Cu2O”-”Fe2O3” and “Cu2O”-CaO at Metallic Copper Saturation, Metall. Mater. Trans. B, 2009, 40B(6), p 892-899
M. Shevchenko, T. Hidayat, P. Hayes, and E. Jak, Liquidus of “FeO”-SiO2-PbO Slags in Equilibrium with Air and with Metallic Lead, Molten 2016, in 10th International Conference on Molten Slags, Fluxes and Salts, 2016 of Conference (Seattle, Washington, USA), pp. 1221–1228
M. Shevchenko and E. Jak, Experimental Phase Equilibria Studies of the Pb-Fe-O System in Air, Equilibrium with Metallic Lead and at Intermediate Oxygen Potentials, Metall. Mater. Trans. B, 2017, 48, p 2970-2983
M. Shevchenko and E. Jak, Experimental Liquidus Studies of the Pb-Fe-Si-O System in Equilibrium with Metallic Pb, Metall. Mater. Trans. B, 2017, 49(1), p 159-180
J. Hadermann, A.M. Abakumov, I.V. Nikolaev, E.V. Antipov, and G. Van Tendeloo, Local Structure of Perovskite-Based “Pb2Fe2O5”, Solid State Sci., 2008, 10(4), p 382-389
D. Batuk, J. Hadermann, A. Abakumov, T. Vranken, A. Hardy, M. Van Bael, and G. Van Tendeloo, Layered Perovskite-Like Pb2Fe2O5 Structure as a Parent Matrix for the Nucleation and Growth of Crystallographic Shear Planes, Inorg. Chem., 2011, 50(11), p 4978-4986
Acknowledgments
The authors would like to thank Nyrstar (Australia), Outotec Pty Ltd (Australia), Aurubis AG (Germany), Umicore NV (Belgium), and Kazzinc Ltd, Glencore (Kazakhstan), and Australian Research Council Linkage Project LP150100783 for their financial support for this research. The authors are grateful to Prof. Peter C. Hayes (UQ) for valuable comments and suggestions, to Ms. Suping Huang for assistance with conducting experiments, and to the staff of the University of Queensland Centre for Microanalysis and Microscopy (CMM) for their support in maintenance and operation of scanning and electron microprobe facilities in the Centre.
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Shevchenko, M., Jak, E. Experimental Liquidus Studies of the Pb-Fe-Ca-O System in Air. J. Phase Equilib. Diffus. 40, 128–137 (2019). https://doi.org/10.1007/s11669-018-0703-7
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DOI: https://doi.org/10.1007/s11669-018-0703-7