TiB_2添加剂对铝电解用炭间糊性能的影响  

Effect of Ti B2additive on properties of ramming paste for aluminum electrolysis

作　　者：姚桢[1,2] 刘卫[1,2,3] 周军[1,2] Yao Zhen Liu Wei Zhou Jun(College of Material and Civil Engineering, Guizhou Normal University, Guiyang 550025, China Guizhou Engineering Research Center for Carbon Materials of Aluminum Electrolysis, Guiyang 550025, China Guizhou Key Laboratory of Inorganic Nonmetal Function Materials Guiyang 550025, China)

机构地区：[1]贵州师范大学材料与建筑工程学院,贵州贵阳550025 [2]贵州省铝电解炭素材料工程技术研究中心,贵州贵阳550025 [3]贵州省教育厅无机非金属功能材料重点实验室,贵州贵阳550025

出　　处：《轻金属》2016年第12期19-23,共5页Light Metals

基　　金：贵州省科学技术基金(编号:黔科合J字[2013]2221号)

摘　　要：采用Ti B2为添加剂,以沥青焦、熟碎、电煅煤为骨料,改质沥青和煤焦油为混合粘结剂制备铝用炭间糊,研究Ti B2添加量对制备炭间糊基本性能、膨胀/收缩过程、失重过程及微观结构的影响。结果表明,随着Ti B2添加量的增加,制备炭间糊的体积密度、电阻率逐渐增大,挥发分、耐压强度逐渐降低,膨胀/收缩先减小后增大;焦化过程提前,失重速率减缓;复合炭化产物尺寸增大,分散性降低。当Ti B2添加量为2%时,制备炭间糊具有较佳的综合性能。Ramming pastes was synthesized using pitch coke, baked scrap, and calcined anthreite coal as aggregate, modified pitch, coal tar as binder and adding TiB2 powder. The effect of TiB2 addition on the basic properties, expansion/shrinkage process, weight loss process and microstructure of ramming paste were investigated. The results indicated that as the TiB2 addition increased, the bulk density and electrical resistivity increased, volatile matter and compressive strength decreased; expansion/shrinkage decreased first and then increased. The coking process advanced and weight loss rate decreased. The size of composite carbonized products increased and the distribution inhomogeneity decreased obviously with increasing the addition of TiB2. The opti- mal comprehensive properties of ramming paste were obtained with addition of TiB2 of 2%.

关 键 词：炭间糊 TiB2添加量 膨胀/收缩率 复合炭化产物 焦化过程 

分 类 号：TF821[冶金工程—有色金属冶金]