Fire-resistant material casting material micro-silica powder product details:

Microsilica (White) for refractory materials, SiO2 content 96%, density 240-300 g/cm³, 20kg 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 significant role in improving the properties of不定形耐火材料. It fills the pores of refractory materials, enhancing volume density, reducing apparent porosity, and significantly increasing strength. It has strong reactivity, forming colloidal particles in water. By adding an appropriate dispersant, its fluidity can be improved, thereby enhancing the properties of the casting material. It possesses strong hydrophilicity, which strengthens the cohesion of refractory materials and greatly 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 materials and ladle materials, permeable bricks, coating materials, self-flowing refractory castables, and wet and dry spray applications. Additionally, it is used in oxide-bonded silicon carbide products, corundum-mullite slabs, high-temperature wear-resistant materials and products, corundum and ceramic products. It has also been extended to varying degrees in the cement and construction materials industry.

The role of microsilica in refractory materials:

(1) Traditional refractory materials have numerous pores, with microsilica powder filling these spaces, which enhances the bulk density and reduces the porosity, significantly increasing strength.

(2) Microsilica powder has strong activity, forming colloidal particles in water. Adding an appropriate dispersant can enhance its fluidity, thereby improving casting properties.

(3) Microsilica easily forms -Si-OH groups in water, exhibiting strong hydrophilicity and activity. It enhances the cohesion of refractory materials and significantly improves their high-temperature performance, while also 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 improving their strength and high-temperature properties.

(3) Serve as a whole steel drum's pouring and coagulant agent.

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