Viscosity measurements of high “Cu2O containing slags in the “Cu2O-SiO2-Al2O3 system in equilibrium with metallic Cu
Present study is a part of an overall program on development of the accurate viscosity model of the complex multi-component slag system for Cu production. Viscosity measurements have been carried out in the Cu2O-rich area of the Cu2O-SiO2-Al2O3 system in equilibrium with metallic copper at temperatures of 1473-1588 K using Al2O3 crucible and spindle aiming to obtain the viscosity data in the Cu2O and Cu2O-SiO2 systems. The custom designed rotating spindle apparatus enables control of the gas atmosphere and rapid quenching of the samples on completion of the experiment. It was found that the solubility of Al2O3 is negligible in the Cu2O melt and is limited in the Cu2O-SiO2-Al2O3 melt under experimental conditions. The fact that the samples are quenched directly after the viscosity measurement enables the compositions and phase assemblage of the slag at temperature to be accurately measured and characterized. The microstructures and phase compositions in the quenched slag samples are determined by Electron Probe X-ray Microanalysis (EPMA). The bulk compositions of the samples are measured with X-ray Fluorescence analysis (XRF). It is believed that the present data are the first experimental measurements of viscosities in this high Cu2O slag system in equilibrium with metallic Cu. The self-consistency of the measurements was analysed with Modified Urbain model. The viscosities of Cu2O-SiO2 liquid in equilibrium with metallic Cu was derived from the model. A correlation was found between activation energies and against ionic strength (z/r). Further development of quasi-chemical viscosity model will be carrid out incorporating the Cu2O prediction.
Viscosity “Cu2O-SiO2-Al2O3 Modified Urbain Model Quasi-chemical viscosity model
Mao CHEN Baojun ZHAO Evgueni JAK
Pyrometallurgy Research Centre, The University of Queensland, St Lucia, Brisbane, QLD 4072 Australia
国际会议
Ninth International Conference on Molten Slags,Fluxes and Salts(第九届国际熔渣、溶剂与熔盐学术会议 MOLTEN12)
北京
英文
1-14
2012-05-27（万方平台首次上网日期，不代表论文的发表时间）