稀土电解过程中氧化钕颗粒在不同工况下运动轨迹分析研究

Analysis and research on the movement track of neodymium oxide particles under different working conditions in the process of rare earth electrolysis

借助3kA稀土电解槽,通过搭建稀土电解槽电解过程的流场分布模型和DPM离散相模型,仿真模拟了氧化钕的下料,通过改变电极插入的深度来探究颗粒的运动过程。研究发现:当临界粒径处于合理范围内时,随电极插入深度的增大,氧化钕颗粒临界粒径也相应增大,颗粒的运动距离也会相应增大,但在这个范围内颗粒的运动轨迹相似。当电极插入深度为220mm、且控制临界粒径为0.8mm,最有利于电解的进行,且此时为控制结瘤物的生成的最优条件;同时,还发现在两电极中间位置下料最佳。进行此研究可为电解槽内减少杂质形成提供很好建议,进而为控制结瘤提供理论指导和技术帮助。

With the aids of a 3kA rare earth electrolytic cell,the flow field distribution model and the DPM discrete phase model of the electrolytic process of the rare earth electrolytic cell have been built to simulate the feeding of neodymium oxide,and the particle movement process has been explored by changing the depth of electrode insertion.The study found that when the critical particle size is within a reasonable range,with the increase of the electrode insertion depth,the critical particle size of the neodymium oxide particles will increase correspondingly,and the movement distance of the particles will increase accordingly,but the movement tra7ectory of the particles is similar within this range.When the electrode insertion depth is 220mm and the control critical particle diameter is 0.8mm,it is most con-ducive to the progress of electrolysis,and this is the optimal condition for controlling the formation of nodules;at the same time,it is also found that the best cut of the material is at the middle of the two electrodes good.This research can provide good suggestions for reducing the formation of impurities in the electrolytic cell,and then provide theoretical guidance and technical assistance for controlling nodules.