碱性复杂炉渣中FexO活度的测定

应用固体电解质定氧探头测定了碱性复杂炉渣的FexO活度,并对结果进行了误差分析。炉渣中的FexO活度对拉乌尔定律呈正偏差,且偏差的程度随CaF₂、FexO含量及碱度的增加而减小,随P₂O₅含量的增加而增大。当炉渣的碱度大于2.1时,FexO活度随温度的上升而减小。根据实验结果,绘制了1450℃时FexO-(SiO₂+P₂O₅+Al₂O₃)-(CaO+MgO+MnO+CaF₂)准三元系的等FexO活度图。

Measurement of the Activities of FexO in Basic Complex Slags

The oxygen probe with solid electrolyte was used for the determination of the activities of Fe_xO in basic complex slags, and the error analysis has been done. The activities of Fe_xO show positive deviation from Raoult's law. It is found that the deviation decreases with increasing CaF₂·Fe_xO content and the basity of slags, and increases with increasing P₂O₅ content. Activity of Fe_xO decreases with increasing temperature when the basity (CaO/SiO₂) value is greater than 2.1, Iso-activity curves of Fe_xO are drawn on the pseudo-ternary diagram Fe_xO-(SiO₂ + P₂O₅ +Al₂O₃)-(CaO+ MgO+MnO+CaF₂).