Modeling and simulation of neodymium oxide dissolution in molten fluorides  

氧化钕在熔融氟化物中溶解过程的建模与仿真

作　　者：Xin-yu WU Fei-fei LIU Jia-hao LI Xin-yu CHEN Shu-mei CHEN 伍昕宇;刘飞飞;李嘉豪;陈鑫宇;陈淑梅(江西理工大学电气工程与自动化学院,赣州341000;江西离子型稀土工程技术研究有限公司,赣州341000;江西理工大学机电工程学院,赣州341000;江西理工大学材料冶金与化学学部,赣州341000)

机构地区：[1]School of Electrical Engineering and Automation,Jiangxi University of Science and Technology,Ganzhou 341000,China [2]Jiangxi Ionic Rare Earth Engineering Research Co.,Ltd.,Ganzhou 341000,China [3]School of Mechanical and Electrical Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China [4]Faculty of Materials Metallurgy and Chemistry,Jiangxi University of Science and Technology,Ganzhou 341000,China

出　　处：《Transactions of Nonferrous Metals Society of China》2022年第7期2414-2427,共14页中国有色金属学报（英文版）

基　　金：financial supports from the Jiangxi Ionic Rare Earth Resources Green Development and High-value Utilization of State Key Laboratory Cultivation Program,China (No.20194AFD44003);the Jiangxi Province Key Innovation Research and Development Platform Plan,China (No.20181BCD40009)。

摘　　要：By combining the mass transfer mechanism of neodymium oxide with dissolution kinetics,a solution strategy for neodymium oxide dissolution was proposed to predict the dissolved neodymium oxide concentration during the process under complex flow field conditions.The factors affecting neodymium oxide dissolution were analyzed in detail.Aiming at the pulse feeding and continuous feeding modes in industrial practice,the characteristics of the dissolution process under the two feeding modes were compared.Simulation results showed that pulse feeding took shorter time to distribute evenly than continuous feeding.Finally,the dissolution time of single-particle neodymium oxide under static flow field conditions was compared with the literature results.Except for only one set of data with a maximum error of about 10%,the errors of other data are all within 5%.结合氧化钕传质机制及其溶解动力学规律,提出一种针对氧化钕溶解过程的求解策略,以预测氧化钕在复杂流场条件下溶解过程中的浓度变化,并对影响氧化钕溶解过程的各个因素进行详细分析。针对工业实际中的脉冲加料和连续加料方式对比研究两种给料方式下氧化钕溶解过程的特征。仿真结果表明,与连续加料方式相比,采用脉冲加料方式时氧化钕在电解槽内达到均匀分布的时间更快。最后,将单颗粒氧化钕在静流场条件下的溶解时间与文献结果进行对比,除仅一组数据的最大误差在10%左右外,其他数据的误差均在5%以内。

关 键 词：neodymium oxide DISSOLUTION SIMULATION mass transfer multiphase flow molten salt ELECTROLYSIS 

分 类 号：TF845[冶金工程—有色金属冶金]