以酚醛树脂为粘结剂的铝电解槽冷捣糊的研制

以酚醛树脂为粘结剂、电煅煤和石墨为骨料，制成了施工温度(20±5)℃下的铝用冷捣糊. 性能检测显示，该冷捣糊具有低电阻率(58.25 mW×m)和高强度(28.05 MPa)等良好性能，明显优于国内厂家生产的冷捣糊，略好于国外厂家. 利用红外和差热-热重技术分析了不同碳化温度下酚醛树脂的官能团变化和冷捣糊加热过程中的质量及热量变化，结果表明，碳化温度越高，树脂官能团消失得越完全，最后生成多苯稠环；冷捣糊热重曲线较复杂，可分为4个阶段.

Preparation of Cold Ramming Paste for Aluminum Electrolysis Cell with Phenol-Formaldehyde Resin as Binder

Cold ramming paste with the ramming temperature range of (20±5)℃ for aluminum electrolysis cell was prepared with phenol-formaldehyde (PF) resin as binder, electro-calcined anthracite and graphite as aggregate, which has good properties such as low electrical resistivity of 58.25 mW×m and high compressive strength (28.05 MPa). It is much better than that of some domestic factories, but a little better than foreign products through property tests. And the analytical results by IR and TG-DSC for the change of functional groups of PF resin at different carbonization temperatures, of mass and heat when heated show that the higher the carbonization temperature is and then the resin functional groups disappear more completely, finally PF resin can be condensed into higher degree of polymerization of aromatic ring. TG-DSC profile of cold ramming paste is very complex and can be divided into four stages.