High Alumina Low Cement Castable Sand Silicon Carbide Castable For Furnace
High Alumina Low Cement Castable Sand Silicon Carbide Castable for Furnace
Silicon Carbide added to the furnace turn into the Si and C for casting iron, One is to improve the carbon content, and the second is to strengthen the reducibility of iron liquid. Greatly reduce the adverse effect of corrosion the furnace. Prevent carbide separate out, Increasing the amount ferrite, The cast iron compact structure, Significantly improve the processing performance and cutting face is bright and clean. Increase the nodular case iron graphite ball number per unit area. Improve spheroidizing rate. For reducing nonmetallic inclusion and slag, eliminate shrinkage, eliminate subcutaneous blowhole also has a good effcet.
Green Silicon Carbide is produced in electric resistance furnace from quartz sand, petroleum coke and salt in high temperature. It's semi-transparent in green color with crystal structure, high hardness and strong cutting ability, stable chemical characteristics, good thermal conductivity. It's suited for grinding hard, brittle and non-metallic such as cemented carbides, optical glass, ceramics, etc.
Chemical & Physical Properties
| 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 800°C. No reduction | |||||
| True Density (g/cm3) | 3.20 | |||||
| Hardness | Knoop (kg/cm2) | 2500-2900 | ||||
| Moh's | 9.5 | |||||
| Color | Green | |||||
| Color after firing | Green | |||||
| Decomposition point | 2300°C | |||||
| Max Usable temperature | 1540°C in air | |||||
| Specific heat (cal/g.oC ) | 0°C | 500°C | 1000°C | |||
| 0.14 | 0.28 | 0.13 | ||||
| Coefficient of thermal conductivity (cal/cm2.sec.oC) | 600°C | 800oC | 1000°C | |||
| 0.080 | 0.061 | 0.051 | ||||
| Electrical resistivity(Wcm) | 25°C | 100°C | 400°C | 800°C | 1400°C | |
| 50 | 46.4 | 26.6 | 7.8 | 0.65 | ||
| Coefficient of liner expansion (x10-6) | 25°C -500°C | 25°C -1000°C | 25°C-1500°C | 25°C-2000°C | 25°C-2500°C | |
| 4.63 | 5.12 | 5.48 | 5.77 | 5.94 | ||
Packaging: 25kg/bag, two layers kraft bag with water proof, and with ton bag outside or each ton packed on a fumigation pallet according to customers' request.
Our certificates
Production Capacity
The company can produce the refractory material products of 178 product brands under eight major series, the annual production capacity is up to 100,000 tons, among them, 60,000 tons of fired products medium-to-high gradly, 20,000 tons of unfired products, 20,000 tons of unshaped refractory materials. The company enjoys the power to engage in import and export trade on its own account, the products find a good sale in Japan, Korea S., Russia, Australia, U.S.A. etc. . Company refractory exported account take advanced position in domestic.
Process Equipment
At present company's equipment level had been equal to that of international large refractory company and detailed showed as followings: On shaping equipment, more than 60 high pressure press(From 260T~1250T),one 24000T Isostatic press; on fire equipment, four ultra-high temperature tunnel furnace and many down-draft furnace; on mold-making equipment, 20 various kinds of lathe, miller, planer and grinder and several heating furnace.
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