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Silicon Carbide:
Deoxidizer of siliconcarbide (sic) is a new strong compound deoxidizer, replacing the traditional silicon powder toner deoxy physical and chemical properties are morestable deoxy effect, so that the deoxidation time compared to the original process, saving energy, steel-making to improve efficiency, improve quality, reduce the consumption of rawand auxiliary materials, reduceenvironmental pollution, improveworking conditions, improve theoverall economic efficiency of the furnace are of great value. In addition, high-grade refractory bricks, outlet, electronic board, refractory class of widely used.
Crystal Form | Alpha SiC hexagonal system | ||||
Chemical nature | Slight acid | ||||
Reaction with acids | Very slight surface action with hydrofluoric acid | ||||
Reaction with Alkalis | Attacked at high temperature by alkalis and iron oxide | ||||
Oxidation-reduction effects | Starts to oxide slowly at 800oC. No reduction | ||||
True Density (g/cm3) | 3.20 | ||||
Hardness | Knoop(kg/cm2) | 2200-2500 | |||
Moh's | 9.5 | ||||
Color | Black | ||||
Color after firing | Black | ||||
Decomposition point | 2200oC | ||||
Max Usable temperature | 1540oC in air | ||||
Specific heat (cal/g.oC) | 0oC | 500oC | 1000oC | ||
0.14 | 0.28 | 0.13 | |||
Coefficient of thermal conductivity (cal/cm2.sec.oC) | 600oC | 800oC | 1000oC | ||
0.080 | 0.061 | 0.0510 | |||
Electrical resistivity ( Wcm) | 25oC | 100oC | 400oC | 800oC | 1400oC |
50 | 46.4 | 26.6 | 7.8 | 0.65 | |
Coefficient of liner expansion (x10-6) | 25oC-500oC | 25oC-1000oC | 25oC-1500oC | 25oC-2000oC | 25oC-2500oC |
4.63 | 5.12 | 5.48 | 5.77 | 5.94 | |
Chemical Compsition (%)
Grit | Sic | F.C. | Fe2O3 |
F12-F90 | ≥98.50 | <0.20 | ≤0.60 |
F100-F150 | ≥98.00 | <0.30 | ≤0.80 |
F180-F220 | ≥97.00 | <0.30 | ≤1.20 |
F230-F400 | ≥96.00 | <0.40 | ≤1.20 |
F500-F800 | ≥95.00 | <0.40 | ≤1.20 |
F1000-F1200 | ≥93.00 | <0.50 | ≤1.20 |
P12-P90 | ≥98.50 | <0.20 | ≤0.60 |
P100-P150 | ≥98.00 | <0.30 | ≤0.80 |
P180-P220 | ≥97.00 | <0.30 | ≤1.20 |
P230-P500 | ≥96.00 | <0.40 | ≤1.20 |
P600-P1500 | ≥95.00 | <0.40 | ≤1.20 |
P2000-P2500 | ≥93.00 | <0.50 | ≤1.20 |
Physical Index
Grits | Bulk Densityg/cm3 | High Densityg/cm3 | Grits | Bulk Densityg/cm3 | High Densityg/cm3 |
F16 ~ F24 | 1.42~1.50 | ≥1.50 | F100 | 1.36~1.45 | ≥1.45 |
F30 ~ F40 | 1.42~1.50 | ≥1.50 | F120 | 1.34~1.43 | ≥1.43 |
F46 ~ F54 | 1.43~1.51 | ≥1.51 | F150 | 1.32~1.41 | ≥1.41 |
F60 ~ F70 | 1.40~1.48 | ≥1.48 | F180 | 1.31~1.40 | ≥1.40 |
F80 | 1.38~1.46 | ≥1.46 | F220 | 1.31~1.40 | ≥1.40 |
F90 | 1.38~1.45 | ≥1.45 |
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