Calcium Silicate Bricks Size Si3N4 Brick
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1. Performance of si3n4 brick
High strength
Low thermal expansion coefficient
Good thermal conductivity and thermal shock resistance
Good resistance to liquid aluminum erosion capability
High erosion
2. Chemical & Physical Specification of si3n4 brick
Index | Al electrolysis cell block | Kiln furniture brick | Pipe | |
SIC, % ≥ | 72 | 70 | 70 | |
Si3N4, % ≥ | 20 | 20 | 20 | |
Fe2O3, % ≤ | 0.7 | 0.7 | 0.7 | |
Bulk Density, g/cm3 ≥ | 2.62 | 2.60 | 2.55 | |
Apparent Porosity, % ≤ | 17 | 18 | 20 | |
Cold Crushing Strength, Mpa ≥ | 150 | 140 | 120 | |
MOR, Mpa | Room temp. ≥ | 42 | 40 | 35 |
1400°Cx0.5hrs ≥ | 45 | 45 | 40 | |
Refractoriness Under Load (0.2Mpa,0.6%), °C ≥ | 1700 | 1700 | ---- | |
Thermal Shock Resistance (Water quenching at 1100), cycle ≥ | 30 | 30 | ---- | |
3. Typically Application of si3n4 brick:
1.) Side wall Electrolyzer cell chemical-industrial reaction pot.
2.) Used as Kiln shed board, slide push board, sagger, Tuyere combined bricks.
3.) Used in blast furnace belly, Bosh and lower stack, cooling wall, rubbish burning furnace and boiler
4. Production process of si3n4 brick
a.) Choose metal silicon as raw material, add additives, then mix.
b.) Put the mixture into the mold, then make embryoid by machine pressing.
c.) Be reaction sintered by nitrogen protection in electric furnace.
5. Packing details of si3n4 brick
a.) The products are packed in wooden cases, and the wooden cases are tied up by 6 steel belts, then the wooden cases are put on fumigation wooden pallet.
b.) We also pack products as custom request.
- Q: The introduction of silica brick
- The silica mineral phase is mainly composed of tridymite and cristobalite, there is a small amount of quartz and glass
- Q: The hot blast stove when the temperature did not rise against the brick interface decreased
- How to keep the brick masonry temperature not lower than 600 DEG C, while the exhaust temperature is not higher than 400 DEG C.
- Q: Why will expand when heated brick
- Because the production of raw materials are silica brick, brick with SiO2 content of not less than 95% of silica as raw materials, adding mineralizer and binder, through mixing, molding, drying, sintering and other processes in the system
- Q: What role does silica play in refractories?
- The natural mineral of silica is called quartz. In refractories, silica and siliceous refractory materials contain more silica. Silica is acidic at high temperature, and siliceous refractory can resist acid slag corrosion
- Q: The brick is mainly used in the place?
- Open hearth furnace regenerator and a sediment chamber, soaking furnace, glass furnace refractory materials and ceramic brick kiln, kiln vault and other load-bearing parts.
- Q: Common bond brick?
- Lime should contain a lot of active CaO, I decompose CaCO3 and MgCO3 not more than 5%, Al2O3+Fe2O3+SiO2 no more than 5%. When the content of large particles, burned Ca-CO3 and over burned lime, the product produced caves, affecting the quality of products.
- Q: How to improve the thermal conductivity of the coke silicabrick rate?
- The content of SiO2 is 98.23% crystalline silica as raw material, with sulfite pulp liquid as binder, millscale and lime as mineralizer, by Jin Hongshi (TiO2) as additive, can improve the rate of thermal conductivity of silica brick for coke oven. When the rutile content is 1.5%, the coefficient of thermal conductivity of silica brick for coke oven is 2.66W/ (m.k).
- Q: The difference between clay refractory bricks and refractory brick in the application.
- Clay brick features good thermal shock resistance and low price, but high temperature performance is not well integrated, and the long-term use temperature is not higher than 1300 degrees. It is widely used in low temperature parts of various kilns.
- Q: Physical solid waste disposal
- Preparation of silica brick pug, a certain amount of waste silica brick used to add ingredients, for the purpose of expansion and stress reduction products when firing, reduce cracks, improve the rate of finished products.
- Q: Such purpose and scope please give me detailed points thank you
- Mainly used for coke oven carbonization chamber and the combustion chamber wall, open hearth furnace regenerator and a sediment chamber, soaking furnace, glass furnace, refractory materials and ceramic brick kiln, kiln vault and other load-bearing parts. Also used for high temperature bearing part of hot blast stove and acid open hearth furnace.
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Calcium Silicate Bricks Size Si3N4 Brick
- Ref Price:
-
- Loading Port:
- China Main Port
- Payment Terms:
- TT OR LC
- Min Order Qty:
- -
- Supply Capability:
- -
OKorder Service Pledge
OKorder Financial Service
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