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首页> 外文会议>Ninth international conferece on molten slags, fluxes and salts >Viscosity measurements of high “Cu2O” containing slags in the “Cu2O”-SiO2-Al2O3 system in equilibrium with metallic Cu
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Viscosity measurements of high “Cu2O” containing slags in the “Cu2O”-SiO2-Al2O3 system in equilibrium with metallic Cu

机译：在与金属铜平衡的“ Cu2O” -SiO2-Al2O3系统中含高“ Cu2O”的炉渣的粘度测量

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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.
机译：目前的研究是开发复杂的多组分炉渣铜生产系统的精确粘度模型的总体计划的一部分。使用Al2O3坩埚和锭子在“ Cu2O” -SiO2-Al2O3体系的“ Cu2O” -SiO2-Al2O3体系中与金属铜平衡的富Cu2O区域中进行了粘度测量，目的是在“ Cu 2 O”和“ Cu 2 O” -SiO 2系统。定制设计的旋转主轴设备能够控制气体气氛并在实验完成后快速淬灭样品。发现在实验条件下，Al 2 O 3在“ Cu 2 O”熔体中的溶解度可忽略不计，而在“ Cu 2 O” -SiO 2 -Al 2 O 3熔体中的溶解度是有限的。在粘度测量之后立即将样品淬火的事实使得能够精确地测量和表征温度下的炉渣的成分和相集合。通过电子探针X射线微分析（EPMA）确定淬火炉渣样品中的微观结构和相组成。用X射线荧光分析（XRF）测量样品的大部分组成。可以相信，目前的数据是在这种高“ Cu2O”炉渣系统中与金属Cu平衡时粘度的首次实验测量。使用改良的Urbain模型分析测量的自洽性。从该模型推导了与金属铜平衡的“ Cu2O” -SiO2液体的粘度。发现活化能与离子强度（z / r）之间存在相关性。结合Cu2O预测，将进一步开发准化学粘度模型。

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