silicon mullite brick is a kind of refractory brick product made of super high alumina bauxite and silicon carbide as raw materials through a special sintering process. It has the characteristics of continuously forming a protective layer and reducing ring formation, and its heat resistance is also very good. The softening temperature under load can reach 1600 ℃, and the service life is long. Mainly used in the transition zone, decomposition zone and cooler of small and medium-sized cement kilns.
silicon mullite bricks for cement kiln
silicon mullite brick is a kind of refractory brick product made of super high alumina bauxite and silicon carbide as raw materials through a special sintering process. It has the characteristics of continuously forming a protective layer and reducing ring formation, and its heat resistance is also very good. The softening temperature under load can reach 1600 ℃, and the service life is long. Mainly used in the transition zone, decomposition zone and cooler of small and medium-sized cement kilns.
silicon mullite bricks are phosphate-bonded high-alumina bricks and phosphate-bonded high-alumina wear-resistant bricks, which are made of dense bauxite clinker as aggregate, phosphoric acid and phosphate as binders, and are produced by high pressure molding and medium temperature heat treatment. become. The thermal stability, wear resistance and chemical resistance of the product are excellent, but the high temperature performance is poor. It is widely used in the preheating zone of the rotary kiln, the decomposition zone and the kiln door cover, the inner lining of the cooler, etc. The ordinary high-alumina bricks were dipped in phosphate, and after being dried and taken out, it was found that the load softening temperature of the original high-alumina bricks increased. After phosphate impregnation, the porosity is significantly reduced, the bulk density is increased, and the flexural strength is significantly improved. Impregnating high-alumina bricks with phosphate can improve the quality of high-alumina bricks and prolong their service life.
index |
|
||
GMI1 650 |
GMI1 600 |
GMI1 550 |
|
Al2O3 % ≥ |
65 |
63 |
60 |
Bulk density (g/cm3)≥ |
2.65 |
2.60 |
2.55 |
Apparent porosity% ≤ |
17 |
17 |
19 |
Compressive strength/Mpa≥ |
85 |
90 |
90 |
softening temperature under load ≥ |
1650 |
1600 |
1550 |
Thermal shock stability (1100℃)/time≥ |
10 |
10 |
10 |
Abrasion resistance at room temperature/cm3≥ |
5 |
silicon mullite bricks features:
Good thermal shock stability
Does not break during use
Does not flake off
Corrosion resistant
The service life is significantly extended.
The compressive strength and load softening temperature of silica molybdenum bricks are significantly higher than those of anti-stripping high-alumina bricks, and their thermal shock stability, corrosion resistance and wear resistance are good, but their thermal conductivity is not high. It is exactly what is required by the process characteristics of the rear transition zone, and the service life is 1.5 to 2 times that of the anti-stripping brick. It has good wear resistance and is more suitable for cooling belts, and its service life can reach more than two years, which is 3 to 5 times that of high alumina bricks.
At present, according to the use conditions of different sections of the rotary kiln, silica mulberry bricks with different performances have been applied. In some large kilns with a daily output of 5,000 tons, refractory manufacturers have upgraded their products - silicon red bricks based on their experience to meet the needs of different kiln types.
Now, it can be said that silica molybdenum brick is the best choice for refractory material for the transition zone of cement rotary kiln.
The alkali-resistant brick for cement kiln has the characteristics of strong alkali erosion resistance, good thermal shock resistance and high cost performance.
Refractory castable is a kind of refractory material that does not need to be formed and has good fluidity after being fired and stirred with water.
White corundum is made from industrial alumina powder, which is smelted in an arc at a high temperature above 2000 ℃ and then cooled. After crushing and shaping, magnetic separation to remove iron, it is divided into various particle sizes.
Chrome corundum brick refers to corundum refractory products containing Cr2O3. At high temperature, Cr2O3 and Al2O3 form a continuous solid solution, so the high temperature performance of chromium corundum products is better than that of pure corundum products. Chromium corundum products are widely used, and the content of Cr2O3 is mostly in the range of 9% to 15%.
High alumina refractory mortars used in kilns in metallurgy, building materials, machinery, chemical industry, electric power and other industries, used for masonry clay bricks, high alumina bricks, corundum bricks, with full ash joints, good air tightness of masonry, high bonding strength, high temperature performance Excellent, suitable for construction time and so on.
In recent years, bauxite powder and bauxite have been widely used in common cast steel coatings and cast iron coatings due to their high fire resistance, good chemical stability, small expansion coefficient, rich source and low price.
The chemical composition of bauxite is mainly Al2O3, SiO2, Fe2O3, TO2, accounting for about 95% of the total composition, and the secondary components are CaO, MgO, K2O, Na20, S, MnO2 organic matter and trace components Ga, Ge, etc.
The refractory ramming material is prepared from a high proportion of granular and powdery materials and a very low proportion of binders and other components, even all of which are composed of granules and powders, and are subject to strong ramming. Bulk materials for construction.
The alkali-resistant brick for cement kiln has the characteristics of strong alkali erosion resistance, good thermal shock resistance and high cost performance.
Refractory castable is a kind of refractory material that does not need to be formed and has good fluidity after being fired and stirred with water.
White corundum is made from industrial alumina powder, which is smelted in an arc at a high temperature above 2000 ℃ and then cooled. After crushing and shaping, magnetic separation to remove iron, it is divided into various particle sizes.
Chrome corundum brick refers to corundum refractory products containing Cr2O3. At high temperature, Cr2O3 and Al2O3 form a continuous solid solution, so the high temperature performance of chromium corundum products is better than that of pure corundum products. Chromium corundum products are widely used, and the content of Cr2O3 is mostly in the range of 9% to 15%.
High alumina refractory mortars used in kilns in metallurgy, building materials, machinery, chemical industry, electric power and other industries, used for masonry clay bricks, high alumina bricks, corundum bricks, with full ash joints, good air tightness of masonry, high bonding strength, high temperature performance Excellent, suitable for construction time and so on.
In recent years, bauxite powder and bauxite have been widely used in common cast steel coatings and cast iron coatings due to their high fire resistance, good chemical stability, small expansion coefficient, rich source and low price.
The chemical composition of bauxite is mainly Al2O3, SiO2, Fe2O3, TO2, accounting for about 95% of the total composition, and the secondary components are CaO, MgO, K2O, Na20, S, MnO2 organic matter and trace components Ga, Ge, etc.
The refractory ramming material is prepared from a high proportion of granular and powdery materials and a very low proportion of binders and other components, even all of which are composed of granules and powders, and are subject to strong ramming. Bulk materials for construction.
The alkali-resistant brick for cement kiln has the characteristics of strong alkali erosion resistance, good thermal shock resistance and high cost performance.
Refractory castable is a kind of refractory material that does not need to be formed and has good fluidity after being fired and stirred with water.
White corundum is made from industrial alumina powder, which is smelted in an arc at a high temperature above 2000 ℃ and then cooled. After crushing and shaping, magnetic separation to remove iron, it is divided into various particle sizes.
Chrome corundum brick refers to corundum refractory products containing Cr2O3. At high temperature, Cr2O3 and Al2O3 form a continuous solid solution, so the high temperature performance of chromium corundum products is better than that of pure corundum products. Chromium corundum products are widely used, and the content of Cr2O3 is mostly in the range of 9% to 15%.
High alumina refractory mortars used in kilns in metallurgy, building materials, machinery, chemical industry, electric power and other industries, used for masonry clay bricks, high alumina bricks, corundum bricks, with full ash joints, good air tightness of masonry, high bonding strength, high temperature performance Excellent, suitable for construction time and so on.
In recent years, bauxite powder and bauxite have been widely used in common cast steel coatings and cast iron coatings due to their high fire resistance, good chemical stability, small expansion coefficient, rich source and low price.
The chemical composition of bauxite is mainly Al2O3, SiO2, Fe2O3, TO2, accounting for about 95% of the total composition, and the secondary components are CaO, MgO, K2O, Na20, S, MnO2 organic matter and trace components Ga, Ge, etc.
The refractory ramming material is prepared from a high proportion of granular and powdery materials and a very low proportion of binders and other components, even all of which are composed of granules and powders, and are subject to strong ramming. Bulk materials for construction.