8kA稀土电解槽单侧电导及阴极优化数值模拟
Numerical simulation for optimization of one-side conductance and cathode of 8 kA rare earth electrolytic cell
龚姚腾 1吕招东 1陈泽斌 1逄启寿1
作者信息
- 1. 江西理工大学 机电工程学院,江西 赣州 341000
- 折叠
摘要
稀土电解槽导电板的分布位置对稀土电解槽的物理场会有影响,为探究稀土电解槽中导电板分布的最优位置,在本次仿真实验中为该导电板的分布引入一个等差数列的分布梯度,通过对不同分布梯度下的槽内物理场仿真数值进行比较,进而得到稀土电解槽导电板最优分布模型.在仿真过程中观察到阴极底部的尖角对实验结果影响较大,在其他条件保持不变的基础上将阴极底部由圆柱优化为半球形,通过与未优化的结构进行对比,验证新型电解槽结构的合理性.仿真结果显示:随着导电板由侧边位置向中间偏移,电解反应时槽内的温度与阳极电势基本保持不变,槽盖板与阳极间的电势差逐渐减小,槽内电流密度缓慢增大.当将阴极钼棒底部由柱状结构改为球状结构后,槽内电势分布更为均匀,电流密度相较于之前的结构也有所增加,优化后的结构能改善局部过热问题,同时也使得电解效率增大.
Abstract
The physical field of rare earth electrolyzer is affected by different distribution positions of conductive plates.In order to explore the optimal location of the conductive plate distribution in the rare earth electrolytic cell,in this simulation,an arithmetic series distribution gradient is introduced for the distribution of the conductive plate,the simulation values of physical field in the groove under different distribution gradients are compared,then the optimal distribution model of conductive plates in rare earth electrolytic cell is obtained.During the simulation,it is observed that the sharp angle at the bottom of the cathode has a great influence on the experimental results,on the basis of other conditions remaining unchanged,the bottom of the cathode is optimized from a cylinder to a hemispherical shape,and the rationality of the new electrolytic cell structure is verified by comparing with the unoptimized structure.The simulation results show that as the conductive plate shifts from the side to the middle,the temperature and anode potential in the tank remain unchanged,the potential difference between the cover plate and the anode gradually decreases,and the current density in the tank slowly increases.When the bottom of the cathode molybdenum rod is changed from a cylindrical structure to a spherical structure,the potential distribution in the tank is more uniform,and the current density is also increased compared with the previous structure.The optimized structure can improve the local overheating problem and increase the electrolytic efficiency.
关键词
稀土电解槽/单侧导电板/通电位置/阴极底部结构/物理场模拟/结构优化/局部过热/电解效率Key words
rare-earth electrolysis cell/one side conductive plate/power up location/physical field simulation/structural optimization/local overheating/electrolysis efficiency引用本文复制引用
出版年
2024
NETL
NSTL
万方数据