Anti seepage refractory castables have the characteristics of low thermal conductivity and strong penetration resistance, which can prevent the penetration and erosion of aluminum liquid and liquid. Moreover, the use of anti-seepage materials can also extend the service life of electrolytic cells.
Anti-seepage castable is used in refractory and heat-insulating layers, and construction is fast and convenient. After construction, it can be quickly heated without baking. Its main function is to be used in electrolytic cells and can replace refractory bricks as impermeable layers. It is a A commonly used refractory castable for aluminum melting furnaces.
The anti seepage refractory castables is designed according to the electrolytic cell to ensure that the internal temperature of the carbon cathode material is greater than 850°C and has good thermal shock resistance. Anti-seepage material can also be used as a barrier layer between the carbon bricks and the insulation layer to prevent the penetration of harmful substances.
The selection of anti-seepage castables can inhibit the penetration of Na and NaF. Because the infiltrated Na and NaF can react with the AL2O3-SiO2 refractory material to generate nepheline and block the pores, which can effectively prevent the continued penetration of Na and NaF.
The anti-seepage castable is used between the carbon bricks on the side wall of the aluminum electrolytic tank and the thermal insulation layer, and is directly laid on the thermal insulation layer at the bottom of the tank. This prevents the penetration of substances such as Na and NaF and also plays a thermal insulation role.
The main performance of the anti seepage refractory castables is when it is heated to 950°C in an electric furnace and the heat preservation time is 96 hours. The sealed crucible naturally cools down to room temperature with the furnace temperature, and the height of the reaction layer after the anti-seepage material reacts with cryolite is the anti-permeability layer of this anti-seepage material.
Anti-seepage castables can also be used in lead smelting furnace linings or furnace linings in the copper smelting industry. The materials of anti-seepage materials used in different furnace linings are different, but no matter what furnace lining is used, the thermal expansion and contraction of the material, the volume stability, and the thermal shock performance Good quality is the key to impermeable materials.
