Brief Introduction
LCC&ULCC have the characteristics of small porosity, high density, good volume stability, high strength and small water addition. At the same time, LCC&ULCC overcomes the characteristics of the common castable that the strength of the castable decreases significantly at 800~1200℃, strength of LCC&ULCC increases with the increase of temperature. What is more, it has excellent thermal shock resistance, slag resistance and corrosion resistance.
The cement content is relatively low, generally about 5%, and some are even reduced to 1% to 2%. Compared with refractory cement castables (cement content is generally 15% to 20%), it has a lower thermal expansion coefficient and higher Wear resistance.
Technical Data
| Item | Specification | |||
| Clay | High Alumina | Corundum | ||
| Al2O3 % | ≥45 | ≥75 | ≥98 | |
| CaO % | ＜1.8 | ＜1.5 | ＜1.0 | |
| Bulk Density, g/cm3 | 110℃×24h | ≥2.3 | ≥2.6 | ≥3.1 |
| 1350℃×3h | ≥2.26 | ≥2.61 | / | |
| 1550℃×3h | / | / | ≥3.00 | |
| CCS, MPa | 110℃×24h | ≥70 | ≥75 | ≥85 |
| 1350℃×3h | ≥85 | ≥90 | / | |
| 1550℃×3h | / | / | ≥100 | |
| CMOR, MPa | 110℃×24h | ≥6 | ≥8 | ≥9 |
| 1350℃×3h | ≥8 | ≥9 | / | |
| 1550℃×3h | / | / | ≥11 | |
| PLC, % | 1000℃×3h | -0.3 | -0.2 | -0.2 |
| 1350℃×3h | ±0.3 | ±0.5 | / | |
| 1550℃×3h | / | / | ±0.5 | |
| Max Working Temperature, ℃ | 1450 | 1600 | 1800 | |
Application
Low cement castable is mainly used in metallurgy, electric power, nonferrous metals, petrochemical, building materials and other industries. Such as the bottom of the glass kiln, the front and back of the kiln door sill cooling machine, and other high-temperature resistant parts, front and rear kiln mouths, coal injection pipes, etc.; various heat treatment furnaces such as heating furnace and soaking furnace; medium frequency induction furnace lining, petrochemical catalysis High temperature wear resistant linings for cracking reactors, linings for other industrial furnaces. Can be cast, smeared, and beaten on site.