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本文介绍一些抗氟材料的探索试验,论述了槽型结构及设计依据和上部大阳极的优点。根据稀土氧化物在熔融氟化物中的溶解度小,它的烧结块具有一定抗氟性能的特点,并采用结壳技术,设计了用稀土氧化物砖作槽衬、槽衬附近挂隔板、上部阳极底部阴极的电解槽结构。这种电解槽在温度950℃的电解中,由于隔板作用,存在温度梯度。在上半部槽衬附近的电解质,保持着较静止状态,温度低而较粘稠,其中的R_2O_3使电解质易形成过饱和及槽衬上可能附着一层壳膜。在隔板下面槽底四周是死角,熔融电解质在此处流动时易产生涡流。在熔盐成椭圆形循环过程中,某些未溶的R_2O_3比重大易沉底,都被冲到槽底堆积起来逐渐形成硬壳,所以在这样的槽衬上形成一个无底碗状的壳体,使R_2O_3砖不受熔融氟化物腐蚀而得到保护,这种电解槽具有较长的使用寿命。
This article describes some of the anti-fluoride exploration test, discusses the groove structure and design basis and the advantages of the upper large anode. According to the rare earth oxide solubility in the molten fluoride is small, its sintered block has a certain anti-fluoride performance characteristics, and the use of crusting technology, designed with rare earth oxide brick for slot liner, slot liner near the hanging partition, the upper part Anode Bottom Cathode Cell Structure. In this electrolysis cell at a temperature of 950 ° C, there is a temperature gradient due to the action of the separator. Electrolytes in the upper half of the tank liner remained relatively quiescent with low and viscous temperatures. The R_2O_3 electrolyte was easily supersaturated and a shell membrane could attach to the liner. In the partition below the bottom of the tank is dead corners around the melt electrolyte flow is easy to produce eddies here. During the elliptical circulation of the molten salt, some undissolved R 2 O 3 heavy sediments are washed away to the bottom of the trough to form a hard shell gradually. Therefore, a shellless bowl-like shell is formed on such a groove liner Body, so that R_2O_3 bricks are protected from corrosion by the melting fluoride, the electrolyzer has a longer life.