Brief Description
SiC Brick(Silicon Carbide Brick) are refractory materials manufactured with SiC as the main raw material, which include 72%~99% SiC content. Silicon carbide bricks are manufactured with mixing SiC granule, SiC powder and binding agent through ageing mixture, moulding, drying and firing. Silicon carbide bricks have features of high thermal conductivity, great wear resistance and can be used for linings of aluminium cell.
Application
Lining of the aluminium cell and coke oven
Molten aluminum tube, and glass furnace
Kiln furniture used in the ceramic kiln
Blast furnace shaft, belly, or bosh of the large or medium ones
Znc retort lining, etc
Technical Datas
| SiC Refractory Bricks | ||||
| Items | Unit | SiO2 Bonded Silicon Carbide Bricks | Azoxty-cornpounds Bonded Silicon Carbide Bricks | Mullite Bonded Silicon Carbide Bricks |
| Al2O3 | % | ~ | ~ | ≥10 |
| SiO2 | % | ≤8 | ~ | ~ |
| Fe2O3 | % | ≤1 | ≤0.6 | ≤1 |
| Sic | % | ≥90 | ≥80 | ≥85 |
| Apparent Porosity | % | ≤18 | ≤18 | ≤18 |
| Bulk Density | g/cm3 | ≥2.56 | ≥2.60 | ≥2.56 |
| Cold Crushing Strength | Mpa | ≥80 | ≥100 | ≥70 |
| Refractoriness under Load | ℃ | ≥1600 | ≥1620 | ≥1550 |
| Thermal Shock Stability （Time/850） | ℃ | ≥40 | ≥40 | ≥35 |
| Thermal Conductivity | w/m*k | ≥8 | ~ | ~ |
| Normal Temperature Bending Strength | Mpa | ≥25 | ≥30 | ≥25 |
| High Temperature Bending Strength1250℃*1h | Mpa | ≥20 | ≥25 | ≥20 |
| Maximum Service Temperature | ℃ | 1400 | 1500 | 1400 |
Manufacturing Process
Nitride bonded silicon carbide bricks: manufactured with silicaon carbide granule and fine silicon powder
Bonded silicon carbide bricks: Mix SiC, silicon powder and carbon powder according to certain proportion through mixing and molding at the high temperature of 1400℃ in reducing atmosphere. Generally, adopt carbon embeded firing process
Silicon oxynitride bonded silicon carbide bricks: when making this kind of fire brick, proportion of fine silicon powder should not be less than silicon carbide
