Product Introduction
Refractory precast blocks are designed with special shapes for the construction site of high-temperature kilns, which are expressed in the form of drawings with precise dimensions. Molds are made according to the shapes of the drawings, and refractory castables are selected according to the use temperature and working environment of the construction site to be vibrated and formed in the mold.
Product Advantage
Convenient construction
The biggest feature of refractory precast block is convenient construction. After casting, curing and baking, the finished products are transported to the site for direct masonry use; the construction is simple and easy, which can save on-site mixing, pouring or ramming and corresponding equipment, save construction time, and make on-site construction unaffected by the construction environment and seasons, ensuring the construction quality.
Desire of instant replacement and instant ignition.
In actual production, replacement is very convenient. If any precast block or castable is damaged, the damaged part can be directly replaced or cast directly at the damaged location, just like replacing equipment parts. Replacement can be completed in a very short time, realizing the desire of instant replacement and instant ignition.
Product Data
| Items | Corundum precast block | Mullite precast block | High alumina precast block | |||
| Chemical composition % | AL2O3≥ | 80 | 55 | 60 | 65 | 65 |
| CaO≤ | 1.5 | 2.5 | 2.5 | 2.0 | 2.4 | |
| Bulk density g/cm3 ≥ | 110℃*24h | 2.7 | 2.3 | 2.4 | 2.4 | 2.4 |
| Modulus of rupture MPa ≥ | 110℃*24h | 6 | 6 | 6 | 6 | 6 |
| 1145℃*3h | 12 | 9 | 10 | 11 | 10 | |
| Cold crushing strength MPa≥ | 110℃*24h | 50 | 30 | 30 | 35 | 35 |
| 1145℃*3h | 70 | 50 | 55 | 60 | 60 | |
| Permanent linear change % | 110℃*24h | ±0.1 | ±0.1 | ±0.1 | ±0.1 | ±0.1 |
| 1145℃*3h | ±0.5 | ±0.5 | ±0.5 | ±0.5 | ±0.5 | |
Application Field
Refractory precast blocks are used in the construction of blast furnaces, converters, electric furnaces and other equipment, and are used in boilers, heating furnaces, smelting furnaces, as well as special irregular parts in the power, building materials, glass and other industries.
