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Corundum Mullite Ultra-low Cement Prefabricated Blocks

Corundum Mullite Ultra-low Cement Prefabricated Blocks

The corundum-mullite ultra-low cement prefabricated block uses super-grade fused white corundum as aggregate, introduces corundum spinel fine powder and micro powder as binder, and adopts low-cement castable technology, that is, adding cement, silica fume, alumina micro powder and additives. The mold is designed according to the size requirements of the prefabricated block, and then it is made through vibration molding, demoulding, baking and other processes. Mullite gives the material excellent high-temperature mechanical properties and certain thermal shock resistance; corundum gives the material high-temperature resistance and wear resistance. Sometimes, the material can have some zirconia added to improve thermal shock resistance. In order to reduce the firing shrinkage, three stones (andalusite, sillimanite and kyanite) can also be used to partially replace mullite. The process of producing large-scale, special-shaped sintered refractory products of corundum-mullite series has the characteristics of easy forming, easy sintering and good high-temperature performance. The products can be used as kiln tools, large bricks and other products for high-temperature industries such as ceramics and glass.
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Description
product-800-800

Corundum-mullite ultra-low cement prefabricated block is an ultra-low cement prefabricated refractory material with preburned brown corundum and mullite as the main raw materials. It has the advantages of density, high high temperature strength, and corrosion resistance. It is a new type of high-efficiency material.

Corundum-mullite ultra-low cement prefabricated block is an ultra-low cement prefabricated refractory material with preburned brown corundum and mullite as the main raw materials. It has the advantages of density, high high temperature strength, and corrosion resistance. It is a new type of high-efficiency material suitable for blast furnace ceramic cups and blast furnace hot tuyere.

Corundum-mullite ultra-low cement prefabricated block Prefabricated blocks made of low-cement castables are used on the moving and fixed beams and columns of walking-beam heating furnaces, with good results. This product is an ultra-low cement prefabricated refractory material with preburned brown corundum and mullite as the main raw materials. It has the advantages of density, high high temperature strength, and corrosion resistance. It is a new type of high-efficiency material suitable for blast furnace ceramic cups and blast furnace hot tuyere.

 

 

Application of corundum mullite ultra-low cement prefabricated blocks in heating furnaces. Due to the introduction of ultrafine powder, the amount of alumina cement added in low-cement castables is reduced, making their performance better than that of ordinary castables.

product-1694-800

 

Brand/Index

HX-MY

Al2O3 % ≥

85

Fe3O3 % ≥

0.8

Apparent porosity AP % ≤

18

Bulk density BD g/cm³ ≥

3.05

Compressive strength CCS Mpa ≥

60

Flexural strength MOR Mpa(1400℃×0.5h) ≥

10

0.2MPa Softening temperature under load RUL ℃ ≥

1650

Re-firing line changes PLC %(1500℃×5h)

0～+1.2

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