CaWO4在NaCl-CaCl2熔盐体系中溶解性能的研究  

Study on Solubility Characteristics of CaWO_4 in NaCl-CaCl_2 Molten Salt

作　　者：房孟钊 廖春发 王旭 王坤 焦芸芬 李伟 宁瑞 余珊 FANG Meng-zhao;LIAO Chun-fa;WANG Xu;WANG Kun;JIAO Yun-fen;LI Wei;NING Rui;YU Shan(The Key Laboratory of Hubei Province for Metallurgy and Recycling of Nonferrous Metals,Daye Nonferrous Metals Company,Huangshi 435002,Hubei,China;College of Metallurgy and Chemical Engineering,Jiangxi University of Technology,Ganzhou 341000,Jiangxi,China)

机构地区：[1]大冶有色金属有限责任公司,有色金属冶金与循环利用湖北省重点实验室,湖北黄石435002 [2]江西理工大学冶金与化学工程学院,江西赣州341000

出　　处：《有色金属（冶炼部分）》2018年第12期33-36,共4页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家自然科学基金资助项目(51074081).

摘　　要：采用等温热饱和法研究CaWO_4在NaCl-CaCl_2熔盐体系中的饱和溶解时间,并在饱和溶解时间下,研究温度和熔盐组分摩尔比对CaWO_4溶解度的影响,采用X射线衍射方法分析熔盐极冷试样的物相组成。结果表明,在650～850℃下,两个小时内溶解基本达到饱和状态,CaWO_4的溶解度随温度的升高呈现线性增加,饱和溶解时间也逐渐缩短。在相同温度下,CaWO_4的溶解度随体系中CaCl_2含量的增加而增大。CaWO_4在体系中的溶解包括物理和化学两个过程,并且以物理溶解过程为主。Saturation dissolution time of CaWO4 in NaCl-CaCl2 molten salt system was investigated by isothermal-saturation method.Effects of temperature and mole ratio of molten salt on solubility of CaWO4 were studied under saturation dissolution time.Phase composition of cooled sample of saturated molten salt was analyzed by XRD.The results show that solubility of CaWO4 linearly rises with increase of temperature during 650~850 ℃,meanwhile,solution rate rises as well.Solubility of CaWO4 rises with increase of CaCl2 content in NaCl-CaCl2 molten salt.Dissolution of CaWO4 in NaCl-CaCl2 molten salt is of physical and chemical nature,mainly of physical one.

关 键 词：NaCl-CaCl2熔盐 CAWO4 溶解度 

分 类 号：O646.1[理学—物理化学]