Coating Resistant Silicon Carbide Castable
Coating Resistant Silicon Carbide Castable Description
Silicon carbide castable is also call coating resistant silicon carbide castable. It takes SiC as main raw material, pure calcium aluminate cement as binder, added with high efficient water reducing agent and ultra micro powder. Silicon carbide is high grade synthesized refractory material, has a wide range of application in refractory industry. Due to its particular characteristic, SiC has very low adhesion ability with cement raw material.
Coating resistant castable’s aggregate mainly compromise low bauxite aggregate, scrap ceramics, scrap electroceramics, SiC and so on. Aluminate cement is usually used as binders of SiC coating resistant castable. Usually, cement raw material is hard to adhere to the surface of SiC castable, so the chance of cement raw material agglomeration at kiln tail is greatly decreased. The application of silicon carbide castable in cement kiln, can avoid the coating of cement in kiln, so the output of cement production line will raise correspondingly.
Coating Resistant Silicon Carbide Castable properties
Coating resistant SiC castable has good abrasion resistance and corrosion resistance.
Good high temperature mechanical strength, high thermal conduction coefficient.
Small linear expansion coefficient, excellent thermal shock resistance.
Won’t react with cement raw material.
Silicon carbide castable has good coating resistance, can significantly decrease coating times.
Coating Resistant Silicon Carbide Castable physiochemical index
| Item | SiC-30 | SiC-50 |
| Al2O3 % ≤ | 35 | 25 |
| SiC ≥ | 30 | 50 |
| Bulk density g/cm3(110℃,24h) | 2.40 | 2.50 |
| Cold compression strength Mpa (110℃,24h) ≥ | 80 | 70 |
| Cold rupture strength Mpa (110℃,24h) ≥ | 9 | 8 |
| Permanent linear change rate % (1100℃,3h) | ±0.4 | ±0.4 |
| Alkali resistance grade | I | I |
| Max. working temperature ℃ | 1350 | 1400 |
| Water addition % | 6.0~7.0 | 5.5~6.5 |
Coating Resistant Silicon Carbide Castable Applications
Based on SiC content, coating resistant SiC castable can be classified into two types: one is SiC-30, which’s SiC content is no less than 30%, the other is SiC-50, which’s SiC content is no less than 50%. Both SiC-30 and SiC-50 SiC castable can be used in places of new type middle large scale dry cement kiln pre-heater feeding slope, ascending flue, decomposing furnace cone and so on, where cement coating is easy to form.