Refractory cement castable is a kind of refractory castable made of refractory cement. Its refractory aggregate can be made of clay, high alumina, mullite, corundum and other high-quality materials…
Refractory cement castable is a kind of refractory castable made of refractory cement. Its refractory aggregate can be made of clay, high alumina, mullite, corundum and other high-quality materials. According to the specific requirements, refractory fiber can also be added.
Refractory cement is made of high-quality bauxite and lime as raw materials, which are mixed into proper amount of raw materials according to a certain proportion. After sintering, the clinker with aluminate as the main component is obtained, and then ground into fine powder to make hydraulic cementing materials with fire resistance. According to different components, it is divided into aluminate cement, dolomite cement, calcium magnesium aluminate cement, etc. refractory cement is used as refractory pouring material A kind of binder or refractory powder used in the injection can make the refractory castable quickly combine and accelerate the setting.
When making refractory castable, adding refractory cement can improve the high temperature performance and high temperature stability. Refractory castable is usually used as the whole lining product of kiln. In the field construction, it is necessary to mix the castable and binder in advance, and then add appropriate water. After uniform mixing, the castable can be poured into the installed lining mold, which can be used after curing, demoulding and baking.
Characteristics of Refractory cement castable：
The refractory cement castable has the advantages of convenient construction, rapid hardening in a short time, compact structure, high temperature volume stability, slag erosion and erosion resistance after high temperature sintering.
Application of Refractory cement castable：
Refractory cement castable is a common lining material for furnace, which is widely used in high temperature industrial furnaces of blast furnace, hot blast furnace, heating furnace, boiler, pelletizing furnace and other industries.
Technical Parameters of Refractory cement castable：
| Item | Refractory cement castable | |||
| Al2O3，% ≥ | ≥70 | ≥75 | ≥90 | |
| Bulk Density，g/cm3 ≥ | 110℃×24h | ≥2.65 | ≥2.7 | ≥3.15 |
| 1500℃×3h | ≥2.6 | ≥2.65 | ≥3.1 | |
| Compressive Strength，MPa ≥ | 110℃×24h | ≥30 | ≥35 | ≥60 |
| 1500℃×3h | ≥60 | ≥65 | ≥100 | |
| Bending Strength，Mpa ≥ | 110℃×24h | ≥5 | ≥5.5 | ≥10 |
| 1500℃×3h | ≥15 | ≥16 | ≥15 | |
| Linear Change Rate ，% | ±0.5 | |||
