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: What is the effect of the content of silicon nitride in silicon nitride bonded silicon carbide brick on the use of electrobath? Thank you
- The main damage of silicon carbide side wall brick is stress damage, not chemical erosion. Chemical damage is formed prior to the formation of the groove, and the damage to the chemical erosion is little after the formation of the groove.
- Q: Why is the new trend of the high thermal conductivity of silica brick
- The high thermal conductivity of silica brick all inherits the advantages of traditional coke oven silica brick, on the basis of further highlight the characteristics of high thermal conductivity.
- Q: Such purpose and scope please give me detailed points thank you because I am learning stage
- Acidic silica brick refractory material, has good acid resistance and slag erosion, softening temperature is as high as 1640 to 1670 DEG C, in the long-term use volume is relatively stable under high temperature. The silica mineral phase is mainly composed of tridymite and cristobalite, there is a small amount of quartz and glass. Tridymite and cristobalite and quartz remaining at low temperature due to phase change, volume changes greatly, so the brick thermal stability at low temperature is very poor. In use, under 800 degrees Celsius, slowly heating and cooling, so as not to produce cracks. The use of temperature in blast furnace so should not be below 800 DEG on. The properties and process of silica crystal with SiO2 transformation is closely related, therefore, the proportion of it is one of the important quality indexes of silica brick. General requirements below 2.38, high quality silica brick should be less than 2.35. The true density is small, reflecting a large number of scale quartz and square quartz in the brick, the residual quartz is small, so the residual line expansion is small, and the strength is decreased in useThe raw materials for the manufacture of silica brick. The higher the SiO2 content of silica raw material, the higher the refractoriness. The most harmful impurities are Al2O3, K2O, Na2O and so on. They seriously reduce the refractoriness of refractory products. Brick with SiO2 content of not less than 96% of silica as raw materials, adding mineralizer (e.g. millscale, lime) and binder (such as molasses, sulfite pulp waste liquid), after mixing, molding, drying, sintering and other processes in the system.
- Q: How much is the highest melting point of silicon?
- Acidic silica brick refractories, softening temperature is as high as 1640 to 1670 DEG C, in the long-term use volume is relatively stable under high temperature. More than 94% silica content.
- Q: Glass kiln brick for physical and chemical indicators?
- Glass kiln with high quality silica brick with silicon oxide content, low melt index, mainly used for glass kiln crown, parapet, wall hanging, small furnace arch superstructure and regenerator.
- Q: Semisilica brick, clay brick, high alumina brick and what is the difference?
- This is a kind of refractory material is divided into three types: semisilica brick (A12O315 ~ 30%), clay brick (A12O330 ~ 48%), high aluminum brick (A12O3>48%).
- Q: Which material is good for furnace refractory?
- Kiln types of refractories is very extensive, selection of refractory materials according to the type of furnace furnace temperature and use of selected refractory material, refractory material is divided into custom products of refractory bricks and unshaped refractory castable series products. According to chemistry, it is divided into acidic, neutral and alkaline materials.
- Q: The brick is mainly used in the place?
- Also used for high temperature bearing part of hot blast stove and acid open hearth furnace.
- Q: How to improve the thermal conductivity of the coke silicabrick rate?
- To improve the thermal conductivity of silica brick for coke oven rate method:Manufacture of high density and high thermal conductivity of silica brick, adding additives such as CuO, Cu2O, TiO2, Fe2O3, (FeO), can improve the thermal conductivity of silica brick.
- Q: The formula in the refractory brick, and firing curve, who knows?
- Iron scale powder 0.45-0.55%, cement 0.9-1.1%, lime milk 6.5-7.5%, pulp 1.95-2.2%, the silica powder, perlite will be added to the wet mill in proportion, and then add iron scale powder, cement, dry roller 1-2 minutes later
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Calcium Silicate Bricks Size Si3N4 Brick
- Ref Price:
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- 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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