Fire-resistant material casting material microsilica product details:

Microsilica (White) for refractory materials, SiO2 content 96%, density 240-300 kg/m³, 20 kg standard packaging.

Application Principle of Microsilica in Refractory Materials:

Microsilica is a ultra-fine solid material. As a new raw material, it has been widely used in the refractory industry, playing a crucial role in improving the properties of不定形耐火材料. It fills the pores of refractory materials, enhancing volume density and reducing apparent porosity, resulting in significantly increased strength. It is highly active, forming colloidal particles in water. By adding an appropriate dispersant, its fluidity is improved, thereby enhancing the properties of the casting material. It has strong hydrophilicity, which enhances the cohesion of refractory materials and significantly improves their resistance to high temperatures, extending the service life of refractory products. It is widely used in high-performance refractory castables and precast products, large-scale iron trough and ladle materials, porous bricks, lining materials, self-flowing refractory castables, wet and dry spray applications, oxide-bonded silicon carbide products, corundum-mullite slabs, high-temperature wear-resistant materials and products, corundum and ceramic products. Additionally, it is also used in varying degrees in the cement and construction materials industry.

Microsilica's role in refractory materials:

(1) Traditional refractory materials have numerous pores, filled with microsilica powder, which increases the bulk density and reduces the porosity, significantly enhancing the strength.

(2) Microsilica powder possesses strong activity, forming colloidal particles in water. By adding an appropriate dispersant, its fluidity can be enhanced, thereby improving casting properties.

(3) Microsilica readily forms -Si-OH groups in water, exhibiting strong hydrophilicity and activity. It enhances the cohesiveness of refractory materials and significantly improves their high-temperature performance, thereby extending the service life of refractory products.

Microsilica is actually applied in the refractory industry in the following aspects:

(1) Substitute for pure aluminum oxide mud as refractory material.

(2) As an additive, it produces both amorphous and shaped refractory products, significantly enhancing their strength and high-temperature performance.

(3) Use coagulant for the overall casting of steel drums.

(4) Adhesives, binders, accelerators, and additives for other refractory products