摘要
铝电解行业的高能耗和高污染问题已成为国际铝业界关注的焦点,研究认为惰性阳极结合可润湿性阴极构成的新型电解系统有望从根本上改善现有的铝电解生产方法,实现节能环保的目标。本研究以提高铝电解用惰性可润湿性TiB_(2)-C复合阴极的物理性能为目标,采用有机树脂对煤沥青粘结剂进行改性,探索不同改性沥青对TiB_(2)-C复合阴极材料性能的影响。结果表明,树脂添加量从0%增加到4%、8%、12%、16%,呋喃和环氧树脂的加入对TiB_(2)-C复合阴极材料的体积密度、开孔率、电阻率、抗压强度等性能明显改善,而酚醛树脂的加入作用不大;呋喃和环氧树脂添加量为12%时改善效果最佳,呋喃改性沥青制备的TiB_(2)-C复合阴极材料对应的物理指标改善幅度分别为1.6%、2.7%、20.4%、42%,环氧改性沥青制备的TiB_(2)-C复合阴极材料对应的指标改善幅度分别为0.8%、1%、14%、39.6%;SEM分析结果表明,改性沥青为粘结剂时,呋喃树脂改性沥青和环氧树脂改性沥青对TiB_(2)颗粒的粘结性比较好,且呋喃树脂改性沥青对TiB_(2)颗粒包裹最好。未改性沥青制备的TiB_(2)-C复合阴极材料电解腐蚀速率为8.07 mm/a,添加呋喃和环氧对沥青进行改性所制备的TiB_(2)-C复合阴极材料腐蚀速率有所降低,分别为4.42 mm/a、4.13 mm/a,说明改性沥青制备的TiB_(2)-C复合阴极材料抗腐蚀性能有所提高。
The issues of high energy consumption and high pollution in the aluminum electrolysis industry have become a major focus for the international aluminum community.Research suggests that a new electrolysis system,composed of inert anodes coupled with wettable cathodes,holds the potential to fundamentally improve the existing aluminum production process,thereby achieving the goals of energy saving and environmental protection.This study aims to enhance the physical properties of inert and wettable TiB_(2)-C composite cathodes for aluminum electrolysis.By modifying coal tar pitch binder with organic resins,we investigated the effects of different modified pitches on the properties of TiB_(2)-C composite cathode materials.The results indicated that as the resin addition amount increased from 0%to 4%,8%,12%,and 16%,the incorporation of furan and epoxy resins significantly improved the bulk density,open porosity,electrical resistivity,and compressive strength of the TiB_(2)-C composites,whereas phenolic resin showed little effect.The optimal improvement was achieved at a 12%addition of both furan and epoxy resins.For the composite prepared with furan-modified pitch,the improvements in the aforementioned physical properties were 1.6%,2.7%,20.4%,and 42%,respectively.Corresponding improvements for the epoxy-modified pitch composite were 0.8%,1%,14%,and 39.6%,respectively.SEM analysis revealed that the furan-and epoxy-modified pitches exhibited better bonding with TiB_(2) particles compared to the unmodified pitch,with the furan-modified pitch providing the most complete coating.The electrolytic corrosion rate of the composite prepared with unmodified pitch was 8.07 mm/a.In contrast,the composites prepared with furan-and epoxy-modified pitches showed lower corrosion rates of 4.42 mm/a and 4.13 mm/a,respectively,demonstrating that the modification process enhances the corrosion resistance of the TiB_(2)-C composite cathode materials.
作者
李珊珊
李浩浩
张瀚文
解鹤
武林
LI Shanshan;LI Haohao;ZHANG Hanwen;XIE He;WU Lin(Ningxia Institute of Technology,Shizuishan 753000,China;Northeastern University,Shenyang 110819,China)
出处
《中国有色冶金》
北大核心
2025年第6期115-121,共7页
China Nonferrous Metallurgy
基金
宁夏回族自治区教育厅高等学校科学研究项目资助(NYG2024234)
宁夏回族自治区2023年度卓越工程师培养计划
应用化学卓越工程师培养班。
