Sillimanite bricks are divided into 65 and 60 sillimanite bricks according to the index.
Sillimanite bricks are thermal insulation bricks made of sillimanite minerals. Sillimanite is converted into mullite and free silica after being calcined at high temperature. It is usually manufactured by high-temperature firing method and drilling mud pouring method. The physical and chemical properties of high-alumina refractory bricks are improved, with a refractoriness of 1770～1830℃, and the starting point of softening under load is 1500～1650℃. It is mainly used for the formation of the liquid hole of the laminated glass tank kiln, the charge of the iron-making blast furnace, the throat and the ceramic craft kiln furniture.
Sillimanite is this kind of high-quality fireproof raw material. It is used to produce high-alumina refractory bricks with low stress relaxation, high-load softness and slightly swelling high-fired shock bricks and heating furnace roofs. The concrete rotating cellar is made of polyphosphate and high-alumina. Refractory bricks, etc.
Characteristics of sillimanite brick
1. Mixing sillimanite into the material of thermal insulation bricks is beneficial to the improvement of the properties of thermal insulation bricks. With the improvement of sillimanite, the actual effect is more obvious.
2. The content of Al2O3 in sillimanite is high, and the heat-preserving bricks are closed without firing. If the content of Al2O3 is low, the heat-preserving bricks are fired and closed.
3. The addition of sillimanite has no harm to the porosity and volume relative density of the thermal insulation brick. The high content of Al2O3 in sillimanite will result in a higher load softening temperature for the made insulation brick, but the compressive strength of the insulation brick is slightly lower.
Features: Thermal insulation brick made of sillimanite minerals. Sillimanite is converted into mullite and free silica after being calcined at high temperature. It is usually manufactured by high-temperature firing method and drilling mud pouring method.
Main application of sillimanite brick
Main application: Mainly used for forming the flow hole of the laminated glass tank kiln, ironmaking blast furnace charge, furnace throat and ceramic craft kiln furniture. Sillimanite crafts include sillimanite bricks, material bowls, material bowls, material rods, punching needles, material channels and so on.
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