对以硝酸钠为氧化剂的富铈混合碳酸稀土焙烧过程进行了实验研究。通过对氧化剂加入量、焙烧温度、焙烧时间的考察 ,得出了铈氧化率的变化规律。研究结果证明 ,硝酸钠对铈的氧化作用是显著的。 The experiment of roasting process of cerium-rich mixed carbonate with sodium nitrate as oxidant was carried out. Through the study on the amount of oxidant, calcination temperature and calcination time, the change law of the oxidation rate of cerium was obtained. The results show that the oxidation of cerium by sodium nitrate is significant.