铝电解槽用干防渗料的导热性与抗渗性

采用自制的沸腾平板导热仪测量防渗料在不同状态下的导热系数,利用坩埚法测量防渗料的抗渗性能。结果表明:防渗料的导热系数随密度的增大而增加,使用过的防渗料导热系数要比新的大一些;防渗料的抗渗能力与堆积密度有关,捣实状态下的抗渗能力比松散状态的好,铝液能够使电解质向防渗料的渗透量增加,在电解质中加入铝块后,防渗料的抗渗能力减弱。

Thermal conduction and anti-penetration of dry barrier powder materials for aluminium electrolytic cells

The thermal conduction coefficient of dry barrier powder materials was determined by home-made apparatus of thermal conduction coefficients by water boiling heat exchange method,and its anti-penetration was also determined by crucible method.The results show that the thermal conduction coefficients of dry barrier powder materials increase with increasing density.The thermal conduction coefficients of the used materials are bigger than that of the new one.The anti-penetration is relative to accumulative density,and the anti-penetration of compact materials is better than that of loosening materials.The anti-penetration of dry barrier powder materials is weakened under the same condition of an industrial cell.