【摘要】 本研究为延长现有阳极周期并减薄阳极底掌气泡层厚度，以400 kA铝电解槽为对象，开展小气泡高导阳极技术的结构优化与性能提升研究。本研究利用ANSYS仿真得到阳极气孔直径为50 mm、边距为250 mm、数量为6个是最优结构。在结构优化基础上，本研究进行碳纳米粉浸渍实验提升阳极周期，确定了4%抗氧化剂A1为核心的最优浸渍配方，及1.6 MPa下浸渍4 h的最佳工艺，并对现有阳极进行浸渍处理。因浸渍后阳极无法根据仿真最优结构进行穿孔，故本研究研发气泡导出装置，该装置与浸渍阳极构成小气泡高导阳极并进行上槽实验，实现气泡层厚度减少约为25%,延长了阳极使用周期至36天。本研究形成的成套技术方案，有效实现铝电解小气泡调控与阳极周期提升，为铝电解行业节能降耗、提质增效提供了工程化支撑，具有重要理论与应用价值。更多还原

【Abstract】 To extend the service cycle of existing anodes and reduce the thickness of the bubble layer on the anode bottom surface, this study takes a 400 kA aluminum reduction cell as the research object, and carries out research on the structural optimization and performance improvement of small-bubble high-conductivity anode technology. Through ANSYS simulation, the optimal anode structure was determined, featuring a pore diameter of 50 mm, an edge distance of 250 mm, and a pore number of 6. On the basis of structural optimization, carbon nanopowder impregnation experiments were conducted to further prolong the anode service cycle. The optimal impregnation formula with 4% antioxidant A1 as the core component was identified, along with the optimal process parameters of impregnation for 4 h under 1.6 MPa, and impregnation treatment was performed on conventional anodes accordingly. Since the impregnated anodes cannot be perforated in accordance with the simulation-optimized structure, a dedicated bubble extraction device was developed in this study. This device, combined with the impregnated anode, constituted the complete small-bubble high-conductivity anode, which was then subjected to in-cell industrial tests. The test results show that the thickness of the bubble layer is reduced by approximately 25%, and the anode service cycle is successfully extended to 36 days. The complete set of technical solutions developed in this study effectively realizes the regulation of small bubbles in aluminum electrolysis and the improvement of anode service cycle. It provides solid engineering support for energy saving, consumption reduction, quality improvement and efficiency enhancement in the aluminum electrolysis industry, and possesses important theoretical significance and engineering application value.更多还原