Kinetics of mixed rare earths minerals decomposed by CaO with NaCl-CaCl2 melting salt
Kinetics of mixed rare earths minerals decomposed by CaO with NaCl-CaCl2 melting salt
复制标题
CaO与NaCl-CaCl2熔盐分解混合稀土矿物的动力学
DOI：
10.1016/s1002-0721(10)60268-2
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发表时间：
2010-12-01
影响因子：
4.9
通讯作者：
Wu Wenyuan
中科院分区：
文献类型：
--
作者：
Bian Xue;Chen Jianli;Wu Wenyuan
为了提高反应速率和降低分解温度，采用TG-DTA、XRD、SEM和化学分析等方法研究了CaO与NaCl-CaCl 2混合分解混合稀土矿物的动力学。结果表明，反应速率随NaC-CaCl 2添加量、CaO添加量和分解温度的增加而增加。CaO分解混合稀土矿物的动力学符合1-2/3X-（1-X）（2/3）=k（d）t模型。NaCl-CaCl 2熔盐的加入降低了分解反应的活化能。NaCl-CaCl 2体系分解产物微观形貌疏松多孔。
For increasing reaction rate and reducing decomposing temperature, TG-DTA, XRD, SEM and Chemical analysis were used to study the kinetics of mixed rare earths minerals decomposed by CaO with NaCl-CaCl2. The results showed that the reaction rate increased with increasing of NaC-CaCl2 addition, CaO addition, and decomposition temperature. The kinetics of mixed rare earths minerals decomposed by CaO conformed to 1-2/3X-(1-X)(2/3)=k(d)t mode. The decomposition reaction rate was controlled by two steps, and the activation energy was decreased with adding of NaCl-CaCl2 melting salt. The micro-pattern of products was loosening and porous with NaCl-CaCl2 in decomposition system.