Characteristics and functions of dry anti-seepage materials
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Time：
2024-08-07
The process of using dry anti-seepage material is to use clay clinker as refractory aggregate, and process three-level high alumina clinker into different particle aggregates and powders, using micro powder technology and binder processing.
Dry materials are mainly used for anti-seepage in aluminum electrolysis tanks. During the production process of electrolytic aluminum, the tank lining will be eroded by cryolite, and steam and aluminum liquid will also penetrate the aluminum solution through the carbon brick joints to the refractory bricks and insulation bricks on the side walls. Moreover, they will penetrate into the insulation layer through the carbon cathode at the bottom of the tank, greatly reducing the service life of the aluminum electrolysis tank.
The effect of dry materials can lower the temperature of the lower part of the electrolytic cell shell and reduce deformation and damage to the shell. It can also prevent electrolyte leakage at the bottom and sides, and the construction of dry anti-seepage material is simple. It can be directly spread flat on the foundation layer and vibrated with a vibrator to achieve compression ratio. Moreover, dry materials will form a layer of garnet layer at high temperatures, which can prevent aluminum liquid from penetrating downwards. Especially during secondary tank repair, the bottom insulation layer can be reused without the need to replace the lower insulation layer.
Dry anti-seepage material is placed on the insulation layer of the furnace bottom, which is made of 65mm calcium silicate board. After the calcium board, there are two layers of 130mm lightweight insulation bricks, and then the dry material is laid on top. Along the length of the groove bottom, three layers of lightweight insulation bricks and wooden boards with a width of 230mm are also laid, and the dry anti-seepage material is filled in. Then, a layer of plywood is laid on top of the dry anti-seepage material, and a vibrator is used to vibrate on the plywood. When installing the cathode carbon block, a 20mm thick layer of dry anti-seepage material is sprinkled on the surface and scraped flat with a level ruler. This way, the cathode carbon block can fall on the dry material to prevent electrolyte from penetrating downwards.
The anti-seepage pouring material is used on the side wall of the aluminum electrolytic cell, with a strong overall function of the lining. The anti-seepage material is constructed by pouring, and water is added and mixed during construction. A vibrating rod is used for vibration construction. After construction, it can quickly heat up without baking. The characteristics of anti-seepage pouring material are resistance to cryolite and aluminum liquid corrosion, high strength, and good thermal shock stability
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