Refractory Materials Related To Electrolysis

Modern electrolytic aluminum production using cryolite - alumina melting salt electrolysis method. Molten cryolite is a solvent, alumina as a solute, the carbon body as an anode, aluminum liquid as a cathode, into a strong DC, at 900 ℃ -1000 ℃, in the electrolysis of the two electrodes on the electrochemical reaction, So that the electrolyte and aluminum to maintain the molten state, from time to time from the tank to release aluminum liquid, and to the tank by adding a certain amount of alumina and cryolite. As the electrolysis process by adding cryolite and other electrolytes can not be fully electrolyzed, the excess part and the melt above the gas phase will cause serious erosion of refractories.Refractory Materials

Aluminum smelting furnace is based on the aluminum smelting process and the development of a new type of energy efficient melting aluminum furnace, it can well meet the aluminum smelting process, the alloy composition requirements, production is not continuous, single furnace capacity and other requirements, Reduce consumption, reduce burns, improve product quality, reduce labor intensity, improve working conditions and improve production efficiency.Refractory Materials During the operation of the furnace, the metal liquid in the furnace is kept churning and stirring, and the lining is continuously washed and worn, and there is the risk of penetration and cracking by the impregnated part of the aluminum liquid. Therefore, the lining material in contact with the aluminum liquid must have a high thermal stability and as little as possible the amount of impregnation, and also requires a high mechanical strength and hardness.Refractory Materials

The life of the furnace wall is the service life of the soaking furnace. Furnace wall, the lower part of the general use of silicon brick masonry. Silicone brick strength and load softening temperature are high, 76. C above the thermal expansion rate is small, the volume stability is good, and the surface to form a thin layer of deterioration, does not produce structural flaking, so the service life is longer, generally 1 ~ 2a. The bottom of the furnace wall to be brick or magnesia brick protection layer to resist the erosion of iron oxide slag. The upper part of the furnace wall is usually made of clay brick and high-alumina brick masonry, in its masonry sand brick, built-in quartz sand, easy to cover around the lid of sand cover knife to ensure the rigidity of the pit. When the furnace wall with high alumina brick masonry, the use of dry slag operation of the upper single burner soaking furnace life of about 2a.Refractory Materials