( 东北大学 材料与冶金学院, 沈阳 110004)
摘 要: 介绍了1.35 kA新型泄流式电解槽的制作、 筑炉、 焙烧、 启动以及电解实验过程;电解槽阴极表面倾角为10°, 阴极采用TiB2/C; 电解槽采用干式砌筑方法, 焦粒焙烧, 干法启动; 启动后进入正常生产, 平均电流强度为1.35 kA; 对电解槽进行类似实际操作的加料、 出铝和阳极升降过程, 连续运行100 h。 结果表明: 泄流式电解槽运行稳定, 槽电压噪声为9 mV左右; 电解过程所表现出的现象与实际电解槽完全类似;根据金属铝产出量和在产铝量计算, 电解效率不低于86%, 接近工业电解槽; TiB2涂层牢固无损, 对阴极起到了较好的保护作用; TiB2涂层的损失速度为1.0 g/(h·m2); 证实了预先的理论分析, 证明电解槽的此种结构是合理和可行的。
关键字: 泄流式电解槽; TiB2涂层; 焙烧; 槽噪声
( School of Materials and Metallurgy,
Northeastern University, Shenyang 110004, China)
Abstract: For a 1.35 kA new-type drained cathode reduction cell, detailed operations of cell building, packing, baking, starting-up and normal operations were presented. Cathode inclination angle was 10°. TiB2-coated cathode was adopted. The cell was drily built, carbon-particulate baked and drily started up. All the operations of feeding, tapping and voltage adjustment were almost the same as those of commercial cells. After 100 h of continuous electrolysis, it is found that the cell performs rather steadily. Cell noise is about 9 mV and the cell performs exactly like industrial cell. Based on metal production and leftover, current efficiency is not lower than 86% which is approaching that of commercial cells. TiB2 coating is firm without any damage and hence performs good protection for carbon cathode. The dissolution speed of TiB2 into electrolyte is about 1.0 g/(h·m2). Test results not only verify the theoretic analysis beforehand, but also prove the feasibility of such kind of cell structure.
Key words: drained cathode cell; TiB2 coating; baking; cell noise