Development and Application of New Dry Barrier Powder Refractory for Aluminum Electrolysis Cell

Abstract

At present, aluminum is produced by cryolite alumina molten salt electrolysis, and its main equipment is aluminum electrolysis cell. The inner village of the aluminum reduction cell is composed of carbon blocks, refractory bricks and insulation materials. In the long term operation of aluminum reduction cells, cathode refractories are gradually destroyed and lost their protective effect on the underlying insulation materials due to the penetration of electrolyte and steam, resulting in the deterioration of the thermal insulation performance of the cells and the production indicators until the cells are forced to shut down. Therefore, it is the goal to find the furnace building materials which can resist electrolyte penetration. The development and application of dry barrier powder refractory is a breakthrough technological progress in solving electrolyte permeation [1].