silica molybdenum brick for cement kiln

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.

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.