中文摘要：

现行分解氟碳铈矿过程中,氟以气相形式逸出,既浪费氟资源,又污染环境。为了寻求新的清洁冶金方法,文中采用DTA-TG和XRD热分析技术对CaO-NaCl-CaCl2焙烧标题矿物分解过程的化学反应进行了研究。用二次正交回归实验设计方法研究了氟碳铈矿分解率随四因素而变化的规律,得出了相应的回归方程,并得出的优化工艺条件：温度：700℃;CaO加入量：15%（质量百分数）;NaCl加入量10%（质量百分数）;焙烧时间：60 min,分解率为92.14%。通过分析讨论可知：由于CaO的加入,氟以CaF2固体的形式存在于焙烧产物中,抑制了气相氟的产生,本文采用的方法是一种清洁冶金工艺。

英文摘要：

Now in process of bastnaesite decomposed, fluorine gives out as gas phase. Therefore, fluorine resource is wasted, and the environment is also polluted. In order to find new cleaning metallurgy method, the decomposition reactions of heading mineral roasting by CaO - NaCl - CaCl2 are studied by means of TG- DTA and XRD methods. The relationship between decomposition ratio and four factors is studied by the quadratic regression orthogonal analysis, and then the regression equation is obtained. The optimum process conditions are obtained as follows： roasting temperature： 700℃, CaO addition： 15%, NaCl- CaCl2 addition： 10%, roasting time： 60 min, the decomposition ratio： 92.14%. Through analysis, because CaO is added, fluorine exists in roasting products as CaF2 solid, and the formation of gas phase fluorine is restrained. Thus it is shown that the method is a cleaning metallurgy technology in this thesis.