本文以Sn为溶剂金属,直接用“渣-金属”化学平衡法,在较大组成范围内测定了CaO-Si0_2-Al_2O_3三元熔渣中CaO的活度。成功地用图示推测法推测了较难直接获得实验结果的低CaO浓度范围内CaO的活度。应用本文实验结果和数据分析得到了该渣系中较全面的等CaO活度曲线图,并对Al_2O_3在该渣系中的酸碱性行为进行了探讨。
With a view to evaluating the activity of CaO in the liquid system CaO-SiO_2-Al_2O_3, Sn was chosen as solvent for studying the slag-metal eqilibria. The results for 1600℃ thus obtained are believed to be more reasonable and trustworthy than previous investigations. An attempt has also been made to develop a graphical method for the analysis of data. By this means, some relatively accurate iso-activity curves of CaO have been obtained, and values of CaO activities in a wide range of composition in this melt can easily be obtained from the figures derived from experimental data by the authors. Inaddition, the amphoteric behaviour of Al_2O_3 has been determined quantitatively, and the results are believed to have practical significance in blast furnace smelting using high alumina slags.
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