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Luoyang Tianzhen Refractory Co., Ltd.
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Sialon bonded silicon carbide brick
The producing peocess of refractory silicon carbide bricks
1) Silicon carbide refractory brick is made of sic raw material, mixed with SiO2 and C.
2) With all the material contact fully, the brick will be pressed under friction press, vibration molding, casting according to its shape.
3) After the billet making, it should be dried under room temperature for 2-3 days.
4)Then it will be sinstered in the high temperature furnace, pass through temperature rise period, temperature constant and temperature cooling period.
5) After sinstered, high quality bricks will be selected.
6) Seaworthy packing and timely delivery are supplied.
With different binding agents, they are devided into several types-for.
Tech Data and their applications are as follows:
1) Clay bonded silicon carbide refractory brick,
It is widely used in high temperature industry as refractory muffle board in industry kiln furnace, plate, sagger etc.
| Item Brand | Apparent porosity(%) | Bulk density(g/cm3) | CCS(MPa) | Refractorness under load(T2,°C) | Thermal shock resistance(1100, °C,water-cooling) | SiC% |
| Standard value | ≤20 | ≥2.5 | ≥80 | ≥1600 | superior | ≥85 |
| Typical value | 18 | 2.55 | 90 | 1650 | superior | 88 |
2) Oxide silicon carbide refractory,
It is used in ceramic industry.
| Item Brand | Apparent porosity(%) | Bulk density(g/cm3) | CCS(MPa) | Hot bending strength Mpa(1400°C*1/2h,Mpa) | Thermal shock resistance(1100, °C,water-cooling) | SiC% |
| Standard value | ≤19 | ≥2.55 | ≥80 | ≥15 | superior | ≥85 |
| Typical value | 18 | 2.6 | 110 | 16 | superior | 88 |
3) Nitride bonded silicon carbide refractory brick,
It is a kind of improvemental refractory products which is widely used in steel industry, smelting, metallurgy, aviation industry. It is also can be used as lining of blast furnace, lining of EAF(Electric arc furnace) or electric cells.
| Item Brand | Apparent porosity(%) | Bulk density(g/cm3) | CCS(MPa) | CMOR(Mpa) | Thermal conductivity(w/m·k) | SiC% | Si3N4% |
| Standard value | ≤18 | ≥2.65 | ≥120 | ≥30 | ≥15 | ≥72 | ≥18 |
| Typical value | 16 | 2.66 | 140 | 35 | 16 | 73 | 21 |
4) Sialon Bonded Silicon Carbide Bricks
It is characterized by good resistance to oxidation and alkali corrosion, mainly used on the underside, belly and bosh of blast furnace.
Item | Si3N4 bonded Sic brick | Sialon bonded Sic brick | |
SiC, % ≥ | 72 | 70 | |
Si3N4, % ≥ | 20 | 5(N) | |
Fe2O3, % ≤ | 0.7 | 0.7 | |
Bulk density,g/cm3 ≥ | 2.65 | 2.65 | |
Apparent porosity ≤ | 16 | 15 | |
CCS, MPa ≥ | 150 | 150 | |
Bending Strength, MPa MOR ≥ | Room temp. | 45 | 42 |
High temp.1400×0.5hrs | 45 | 50 | |
Refractoriness under load(0.2MPa, 0.6%)≥ | 1700 | 1700 | |
Thermal shock resistance,cycle(warter quenching at 1100°C) | 30 | 30 | |
The standard size of the bricks is 230*114*65mm. If you have other requirements about the shape, we can order as you need.
The tech data is just for preference. We can produce different levels as you require.
Any further questions pls feel free to contact with Hattie Yao, your kind inquiries are welcomed.
Skype: Hattie_Yao
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