CaCl_2-CaF_2熔盐的脱水工艺及性能研究  

THE DEWATERING PROCESS AND THE PROPERTIES OF THE CaCl_2-CaF_2 MELTEN SALT

作　　者：李鸿亚 江洪林[2] 严陈昌 胡志方[2] 吴延科[2] 尹延西[2] LI Hong-ya;JIANG Hong-lin;YAN Chen-chang;HU Zhi-fang;WU Yan-ke;YING Yan-xi(The Forth Filiate of 404 Company Limited,CNNC,Lanzhou 732850,China;Rare Metal and Metallurgy Materials Research Institute,General Research Institute for Non-ferrous Metals,Beijing 100088,China;CNNC Environmental Protection Co.,Ltd.,Beijing 100191,China)

机构地区：[1]中核四0四有限公司第四分公司,兰州732850 [2]北京有色金属研究总院稀有金属冶金材料研究所,北京100088 [3]中核环保有限公司,北京100191

出　　处：《矿冶》2018年第5期52-55,共4页Mining And Metallurgy

摘　　要：采用真空脱水工艺对CaCl_2-CaF_2熔盐进行处理,研究了脱水温度、脱水时间对CaCl_2-CaF_2熔盐中H_2O、CaO含量的影响,研究了不同粒度对吸水性能的影响以及金属铈溶解度和温度、时间的关系。结果表明,脱水温度500℃、脱水时间5 h时,熔盐中的H_2O、CaO含量最低;温度800℃、保温时间2 h制备的熔盐中的H_2O<0.05%、CaO<0.02%;金属铈在熔盐中的溶解度随着熔盐温度、溶解时间的增加逐渐增加;不同粒度的熔盐表现出不同的吸水性能,熔盐粒度越小,吸水性能越强。The CaCle-CaF2 molten salt was made by the vacuum dewatering process, and the effects of the de- watering temperature and dewatering time on the HeO and CaO, the influence of the different sizes on the watering absorption and the relationships between the solubility of the metal cerium and the temperatures and time were stud- ied. The results showed： the impurities HeO and CaO contents in molten salt were low under the conditions of the dewatering temperature 500 ℃ and the dewaerting time 5 hours, the content of the HeO and CaO of the prepared molten salt was 〈 0.05% and 〈 0.02% respectively using the process of the temperature 800 ℃ and the keeping time 2 hours. The solubility of the metal cerium in molten salt increased gradually with the increase of molten salt temperatures and dissolution time. The water absorption properties of the different particle sizes molten salt were different obviously, the smaller the molten salt grain, the stronger the water absorption performance.

关 键 词：熔盐 CaCl2-CaF2 溶解度 吸水性 

分 类 号：TF841.4[冶金工程—有色金属冶金]