(北京有色金属研究总院稀土材料国家工程研究中心有研稀土新材料股份有限公司，北京 100088)
摘 要: 采用雷诺应力模型(RSM)对上插式阴极结构稀土熔盐电解槽内部流场进行模拟研究，得到电解槽内部含气率和流场分布规律。计算结果表明：电解产生的气体主要集中在阳极内表面附近，且在电解槽上端靠近阳极处，含气率达到最大值；阳极内表面附近的最大上升流速为0.9 m/s；电解槽底部大部分区域电解质的流动速度均小于0.01 m/s，基本上属于流动死区；在底吹气体搅拌模型下，电解槽底部出现逆时针涡流，该区域电解质的流动速度较未通气体时的相比增加10倍以上，这能够在一定程度上改善电解槽底部的流动性，减轻底部“结瘤”现象。
关键字: 稀土电解槽；雷诺应力模型；流场；气体搅拌；数值模拟
（Grirem Advanced Materials Co., Ltd., National Engineering Research Center for Rare Earth Materials,
General Research Institute for Nonferrous Metals, Beijing 100088, China）
Abstract:The flow field of the plug-in cathode structure rare earth electrolysis cell was numerically simulated based on Reynolds stress model (RSM). And the distribution rules of gas fraction and velocity field were obtained. The results show that, the anode gas generated by electrolysis mainly concentrates in the vicinity of the inner surface of the anode, and the gas fraction reaches the maximum value at the upper of the electrolysis cell near the anode. The velocity of the upside near the inner surface of the anode is 0.9 m/s. The bottom velocity of the electrolyte is less than 0.01 m/s, which basically belongs to stagnant zones. Compared with the way of without gas stirring at the bottom of the electrolysis cell, there is a anticlockwise eddy current, and the bottom velocity of the electrolyte increases by more than 10 times, which can improve liquidity at a certain degree, and reduce the “nodulation” at the bottom of the cell.
Key words: rare earth electrolysis cell; Reynolds stress model; flow field; gas stirring; numerical simulation
