High-temperature refractory cement is a special cement that can withstand a certain high temperature. Both aluminate cement and high-alumina cement are high-temperature refractory cement with a resistance of more than 1,000 degrees. Both of them are used as binders to prepare refractory concrete. It can be called refractory castable.
 
What are the high temperature refractories in cement
1. The aluminate cement with calcium aluminate as the main component, the refractory temperature can reach 1300-1400 ℃, the clinker with alumina content of about 50%, the hydraulic cementitious material obtained by grinding, can be used for manufacturing Unshaped refractory materials are used in the lining of various industrial furnaces and boilers such as metallurgy, chemical industry, petroleum, electric power, machinery and building materials.
The alumina content of aluminate cement products is relatively high, and various impurity components are relatively low. In particular, the rational deployment of CA phase (calcium aluminate) and CA2 phase (dicalcium aluminate) makes this series of products not only endow the amorphous refractory with high mechanical properties, but also make it have excellent high temperature performance. Therefore, it is very suitable for high temperature environments with operating temperatures exceeding 1300 degrees.
2. High-alumina cement with limestone and other related substances as raw materials, manufactured according to a certain proportion. The main component is aluminate.
The chemical composition of high alumina cement is mainly AI203 and CaO, and some also contain a considerable amount of Fe203 and SIO2. The mineral composition has the following five minerals: monocalcium aluminate cao AI203 (CA), calcium dialuminate Cao-2AI203 (CA2), dodecalumina heptaaluminate 12CaO-7AI203 (C12A7) three compounds and calcium containing inclusions It is composed of yellow feldspar 2Ca0-Al203-SiO2 (C2AS), tetracalcium ferric aluminate 4CaO-AI2O3-Fe203 (C4AF), etc.
 
Application introduction
High temperature refractory cement application:
1. Commonly used in the manufacture of unshaped refractories;
2. With refractory coarse and fine aggregates (such as chromite, etc.);
3. It can be made into heat-resistant concrete with high temperature resistance;
4. It is used for projects with urgent construction period: it is used for the projects of anti-sulfate corrosion and the projects of seasonal construction.
 
Precautions
1. High temperature refractory cement should avoid moisture, and other types of cement should not be thick and cloudy, and the stacking height should be 8-10 layers.
REDMI NOTE 9
2. Not applicable to:
 1. Mass concrete works;
2. Works exempted from alkaline solutions;
3. Do not use with unhardened Portland cement concrete or mix with Portland cement or lime;
4. Steam maintenance, construction in high temperature season.