Types of refractory cement
2024-06-07 15:33:10
Refractory cement, as a special cement that maintains stable performance in high temperature environments, has various types and unique characteristics. The following will introduce in detail the main types of refractory cement, including their raw material composition, characteristics, application fields and related data support.
1. Aluminate refractory cement
Aluminate refractory cement is usually made by mixing and grinding low-calcium aluminate refractory cement clinker and high-alumina cement clinker. Its notable features are high early strength and refractory close to low calcium aluminate refractory cement. The main raw materials of aluminate refractory cement include high-quality bauxite and limestone, which are made through specific sintering and grinding processes. This cement has a high alumina content, which gives it excellent resistance to fire and chemical attack.
2. Low calcium aluminate refractory cement
Low-calcium aluminate refractory cement uses high-quality bauxite and limestone as the main raw materials, and is mixed into raw materials with appropriate ingredients according to a certain proportion. After sintering, the clinker with low-calcium aluminate as the main component is obtained, and then ground into fine powder production. Its composition is generally 70% aluminum oxide, 19% to 23% calcium oxide, and other ingredients such as silica account for the remainder. Low calcium aluminate refractory cement has excellent fire resistance and chemical corrosion resistance and is widely used in the preparation of refractory materials, the bonding and repair of refractory bricks, as well as in metallurgy, chemical industry and other fields.
3. Calcium magnesium aluminate cement
Calcium-magnesium aluminate cement is made of high-quality bauxite and dolomite as the main raw materials, mixed in appropriate proportions, sintered and ground. Among its ingredients, aluminum oxide accounts for 66% to 74%, calcium oxide accounts for 13% to 18%, magnesium oxide accounts for 10% to 13%, and other ingredients such as silica account for the remaining proportion. The refractoriness of calcium magnesium aluminate cement is above 1650°C, and it has the characteristics of strong resistance to chemical erosion of slag and metal melt. It is widely used in refractory linings and heat insulation materials of high-temperature kilns.
4. Dolomite refractory cement
Dolomite refractory cement is made from dolomite as the main raw material, adding apatite, iron ore, etc. This cement has high refractoriness and corrosion resistance and is often used for lining and repairing high-temperature equipment and furnaces. The raw material ratio and production process of dolomite refractory cement have been carefully adjusted to ensure the stability and reliability of its performance.
5. High alumina refractory cement
High alumina refractory cement is made of high alumina bauxite (Al2O3 content is greater than 50%) as the main raw material. This cement has excellent fire resistance and corrosion resistance, and can be used stably for a long time in high temperature environments. High alumina refractory cement is widely used in the preparation of refractory materials, the bonding and repair of refractory bricks, and high-temperature equipment in metallurgy, chemical industry and other fields.
6. Portland refractory cement
Portland refractory cement uses silicate minerals as basic raw materials, such as calcium silicate (CaO·SiO2), magnesium silicate (MgO·SiO2), etc. This kind of cement has the characteristics of high temperature resistance, alkali resistance and corrosion resistance, and is often used in the construction of refractory structures such as glass kilns, ceramic kilns, and coal gasification furnaces. The preparation process and raw material ratio of Portland refractory cement are strictly controlled to ensure the stability and reliability of its performance.
To sum up, there are various types of refractory cement, each with its own characteristics. Different types of refractory cement have differences in raw material composition, characteristics, application fields, etc. Choosing the appropriate type of refractory cement requires considering factors such as process requirements, use environment and material properties, and following relevant specifications and standards.
1. Aluminate refractory cement
Aluminate refractory cement is usually made by mixing and grinding low-calcium aluminate refractory cement clinker and high-alumina cement clinker. Its notable features are high early strength and refractory close to low calcium aluminate refractory cement. The main raw materials of aluminate refractory cement include high-quality bauxite and limestone, which are made through specific sintering and grinding processes. This cement has a high alumina content, which gives it excellent resistance to fire and chemical attack.
2. Low calcium aluminate refractory cement
Low-calcium aluminate refractory cement uses high-quality bauxite and limestone as the main raw materials, and is mixed into raw materials with appropriate ingredients according to a certain proportion. After sintering, the clinker with low-calcium aluminate as the main component is obtained, and then ground into fine powder production. Its composition is generally 70% aluminum oxide, 19% to 23% calcium oxide, and other ingredients such as silica account for the remainder. Low calcium aluminate refractory cement has excellent fire resistance and chemical corrosion resistance and is widely used in the preparation of refractory materials, the bonding and repair of refractory bricks, as well as in metallurgy, chemical industry and other fields.
3. Calcium magnesium aluminate cement
Calcium-magnesium aluminate cement is made of high-quality bauxite and dolomite as the main raw materials, mixed in appropriate proportions, sintered and ground. Among its ingredients, aluminum oxide accounts for 66% to 74%, calcium oxide accounts for 13% to 18%, magnesium oxide accounts for 10% to 13%, and other ingredients such as silica account for the remaining proportion. The refractoriness of calcium magnesium aluminate cement is above 1650°C, and it has the characteristics of strong resistance to chemical erosion of slag and metal melt. It is widely used in refractory linings and heat insulation materials of high-temperature kilns.
4. Dolomite refractory cement
Dolomite refractory cement is made from dolomite as the main raw material, adding apatite, iron ore, etc. This cement has high refractoriness and corrosion resistance and is often used for lining and repairing high-temperature equipment and furnaces. The raw material ratio and production process of dolomite refractory cement have been carefully adjusted to ensure the stability and reliability of its performance.
5. High alumina refractory cement
High alumina refractory cement is made of high alumina bauxite (Al2O3 content is greater than 50%) as the main raw material. This cement has excellent fire resistance and corrosion resistance, and can be used stably for a long time in high temperature environments. High alumina refractory cement is widely used in the preparation of refractory materials, the bonding and repair of refractory bricks, and high-temperature equipment in metallurgy, chemical industry and other fields.
6. Portland refractory cement
Portland refractory cement uses silicate minerals as basic raw materials, such as calcium silicate (CaO·SiO2), magnesium silicate (MgO·SiO2), etc. This kind of cement has the characteristics of high temperature resistance, alkali resistance and corrosion resistance, and is often used in the construction of refractory structures such as glass kilns, ceramic kilns, and coal gasification furnaces. The preparation process and raw material ratio of Portland refractory cement are strictly controlled to ensure the stability and reliability of its performance.
To sum up, there are various types of refractory cement, each with its own characteristics. Different types of refractory cement have differences in raw material composition, characteristics, application fields, etc. Choosing the appropriate type of refractory cement requires considering factors such as process requirements, use environment and material properties, and following relevant specifications and standards.