Experimental phase equilibria studies in the "CuO0.5"-CaO-SiO2 ternary system in equilibrium with metallic copper. Issue 7 (1st April 2022)

• Record Type: Journal Article
• Authors: Khartcyzov, Georgii; Shevchenko, Maksym; Cheng, Siyu; Hayes, Peter C.; Jak, Evgueni
• Is Part Of: Ceramics international. Volume 48:Issue 7(2022)
• Page Start: 9927
• Page End: 9938
• Publication Date: 2022-04-01
• Subjects: Phase equilibria -- CuO0.5 -- CaO -- SiO2 -- Copper -- Liquidus -- Refractories -- Microstructure; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2021.12.197
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: Phase equilibria studies were undertaken on the "CuO0.5 "-CaO-SiO2 system in equilibrium with metallic copper to provide fundamental information on the reactions taking place between slags and refractory materials in metallurgical furnaces. The liquidus isotherms between 1160 and 1706 °C in the tridymite and cristobalite (SiO2 ), cuprite (Cu2 O), pseudowollastonite (CaSiO3 ), rankinite (Ca3 Si2 O7 ) and dicalcium silicate (Ca2 SiO4 ) primary phase fields, and the 2-liquid miscibility gaps in the silica-rich corner and low-silica area of the system, were experimentally determined using the equilibration and quenching technique, followed by the electron probe X-ray microanalysis (EPMA) of phase compositions. The liquidus surface of the "CuO0.5 "-CaO-SiO2 system has been constructed. The dissolution of copper oxide in the tridymite and cristobalite (SiO2 ) was shown to be negligible. The data obtained are used for the optimization of the thermodynamic database for the copper-containing systems.