中文摘要：

采用Mo[Mo＋MoO｜ZrO2（MgO）｜Fe＋（Fe1O）＋Ag｜Fe固体电解质电池测定不同温度和气氛条件下定组成CaO-SiO2-Al2O3-MgO-FetO五元渣系的Fe。0活度。结果表明，当Ar作为保护气氛时，温度由1673K升高到1785K，炉渣的Fep活度变化不明显。当气氛中CO，C02和Ar组成固定时，炉渣的Fet0活度随温度的升高而增大。温度为1673K时，炉渣的Fet0活度随着气氛中C02／CO的增加而增大。温度和气氛对渣系FetO活度的影响均通过体系的02分压实现。

英文摘要：

The FetO activities of CaO-SiO2-Al2O3-MgO-FetO slags of fixed component was deterrniaed by the solid electrolyte cell： Mo[Mo＋MoO｜ZrO2（MgO）｜Fe＋（Fe1O）＋Ag｜Fe under different temperatures and gas ratios. The results reveal that, only Ar as the protective gas, the effect of temperature on the FetO activity is not distinct while temperature increases from 1 673 K to 1 785 K. The FetO activity rises as temperature increases while the ratio of CO, CO2, and Ar of mixed gas is constant. While temperature is 1 673 K, the FetO activity rises as the ratio of CO2/CO of mixed gas increases The influence of temperature and gas ratio on the FetO activity is both carried out by the partial pressure of 02 actually.