(北京有色金屬研究總院稀土材料國(guó)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: 采用雷諾應(yīng)力模型(RSM)對(duì)上插式陰極結(jié)構(gòu)稀土熔鹽電解槽內(nèi)部流場(chǎng)進(jìn)行模擬研究，得到電解槽內(nèi)部含氣率和流場(chǎng)分布規(guī)律。計(jì)算結(jié)果表明：電解產(chǎn)生的氣體主要集中在陽(yáng)極內(nèi)表面附近，且在電解槽上端靠近陽(yáng)極處，含氣率達(dá)到最大值；陽(yáng)極內(nèi)表面附近的最大上升流速為0.9 m/s；電解槽底部大部分區(qū)域電解質(zhì)的流動(dòng)速度均小于0.01 m/s，基本上屬于流動(dòng)死區(qū)；在底吹氣體攪拌模型下，電解槽底部出現(xiàn)逆時(shí)針渦流，該區(qū)域電解質(zhì)的流動(dòng)速度較未通氣體時(shí)的相比增加10倍以上，這能夠在一定程度上改善電解槽底部的流動(dòng)性，減輕底部“結(jié)瘤”現(xiàn)象。
關(guān)鍵字: 稀土電解槽；雷諾應(yīng)力模型；流場(chǎng)；氣體攪拌；數(shù)值模擬
（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
