全电解质焙烧技术在400kA电解槽上的应用

本文对400kA铝电解槽全电解质焙烧的前期技术方案设计、实施要求和实测数据进行了探讨和分析.通过分流器设计、石墨碎掺配技术应用、全电解质装炉方案实施、电解槽测温点选取、优化分流器拆除等一系列措施,使焙烧温度均匀、升温梯度满足要求,焙烧温度达到启动要求.     

改进的二硼化钛基惰性阴极耐蚀性的研究

用冷压烧结法制造了TiB2-MoSi2惰性阴极,得到致密的二硼化钛基惰性阴极试样。在电解实验后,通过对二硼化钛阴极的表面和剖面的电子显微分析,发现铝液对此种惰性阴极的湿润性好于电解质对惰性阴极的湿润性,避免了电解质与阴极表面的接触,发现惰性阴极的腐蚀为电解南对阴极晶界的腐蚀,测得腐蚀速度为2．22mm/a,证明其耐蚀性能良好。     

Wettability and interfacial behaviour of NdF3-LiF-Nd2O3 on TiB2-based ceramics

Wettability of TiB2-based ceramics by NdF3-LiF-Nd2O3 melt was studied using sessile drop technique in this paper. Wetting ex-periment was carried out under inert atmosphere at 1050 ℃. Chemical reactions which occurred on the solid-liquid interface and solid-gas interface during wetting process were discussed by thermodynamic calculations combined with X-ray diffraction (XRD) patterns. Micromorphoiogy and element distribution of fracture surface at the interfacial region of solid/liquid system were analyzed by scanning elec-tron microscope (SEM) equipped with energy dispersive spectrometry (EDS). Contact angles of the drop were determined as a function of time in order to describe the wetting process, and wetting phenomenon was interpreted fi'om a viewpoint of interface structure. The results showed that wetting was a dynamic wetting process with characteristics of reactive wetting. Penetration and oxidization phenomena during the experiment had great effect on wetting process.     

计算机控制技术在铝电解中的应用

随着计算机技术的发展，电解铝厂中已普遍应用了计算机自动控制技术，这一先进技术也给铝厂带来了巨大的经济效益和社会效益。铝电解过程中的能量平衡和物料平衡是自动控制系统的核心，本文结合当今电解铝厂中实际应用的自动控制技术，对能量平衡和物料平衡原理进行了详细的阐述。并对我国电解铝厂未来自动控制技术的发展方向进行了展望。     

新型铝电解金属基复合材料惰性阳极研制与应用

研制了一种了铝电解惰性阳极的新型金属基复合材料，复合材料阳极导电性好且具备优良的抗氧化耐冰晶石熔盐腐蚀性能。在温度为850℃，60安培电流，阳极电流密度为10A／cm^，摩尔分子比为18的30％氧化铝浓度的冰晶石系电解质中进行了长时间的电解应用。结果表明，电解过程进行较为平稳，阳极周围产生大量气体。阳极腐蚀速率为2391mm／year，电解铝产品质量达到98％～99％，解决金属基惰性阳极电解过程合金成分对产品的污染问题。