Application advantages of different specifications of sodium feldspar in refractory materials

With the development of industry, the improvement of refractory performance is more dependent on the refinement of raw materials. Sodium feldspar (NaAlSi₃O₈) has become an important raw material for high-performance refractory materials due to its excellent high-temperature performance, fluxing properties and cost advantages. It is widely used in the fields of amorphous refractory materials, high-aluminum products and lightweight thermal insulation materials.

Performance advantages of sodium feldspar in refractory materials

Sodium Feldspar has good thermal stability, low thermal expansion coefficient and good melting characteristics. Its main components, aluminum oxide (Al₂O₃) and silicon dioxide (SiO₂), are the core skeleton structure raw materials of refractory materials. During the high-temperatu

re firing process, sodium feldspar participates in the formation of mullite phase, enhancing the volume stability and thermal shock resistance of refractory products. In addition, the presence of sodium ions helps to lower the melting point, allowing the material to achieve better density control during the firing process, thereby improving the strength of the product.

Application fields of different specifications of sodium feldspar

The application of sodium feldspar products in refractory materials can be divided into two mainstream specifications, 100 mesh and 200 mesh, according to the particle size. Its specific uses have obvious division of labor due to the difference in particle size:

100 mesh sodium feldspar: mainly used in the matrix aggregate part of bulk refractory products such as high-alumina bricks, magnesia-alumina bricks and castables. In the casting and metallurgical industry, the 100 mesh specification can effectively improve the compressive strength and thermal stability of the product, and is suitable for high-temperature parts such as ladles and tundishes. Its coarse particle size forms a uniform pore structure during high-temperature sintering, which helps to improve the permeability and thermal shock stability of the material.

200 mesh sodium feldspar: more suitable for matrix fillers or fluxes of castables, refractory coatings and composite refractory prefabricated parts, especially in inorganic bonded refractory materials. Fine powder sodium feldspar can quickly participate in the reaction during the sintering process, promote liquid phase sintering, and significantly improve the density and mechanical strength of the material. Experimental data show that after adding 5% by mass of 200 mesh sodium feldspar, the flexural strength of a high-alumina refractory castable increased by about 12.5%.

Product advantages of Henan Ankai New Materials Co., Ltd.

As a leading non-metallic mineral material deep processing enterprise in China, Henan Ankai New Materials Co., Ltd. has a fully automatic production line with an annual output of over 100,000 tons of sodium feldspar fine powder, equipped with advanced production technology, and its products have the following significant advantages:

Precise particle size control: The product particle size D90 is stably controlled, and the particle size fluctuation rate of 100 mesh and 200 mesh specifications is less than ±3%, ensuring the consistency of material performance.

Low impurity content: Through magnetic separation and iron removal process, the iron content is less than 0.17%, ensuring that the product does not affect the whiteness and sintering performance of the product at high temperature.

High activity: High temperature pretreatment technology improves the reaction activity of sodium feldspar, participates in the reaction more fully in the composite material, and improves the overall density of the material.

Stable supply chain: Relying on its own mineral sources and warehousing and logistics system, Ankai New Materials can provide downstream customers with customized graded products with short delivery cycles and support long-term stable supply.

Conclusion

As a professional supplier of sodium feldspar raw materials, Henan Ankai New Materials Co., Ltd. relies on its own mineral resources and advanced technology to stably provide products of multiple specifications such as 100 mesh and 200 mesh, which are widely used in various segments of refractory materials, helping companies improve performance, reduce costs, and promote the industry to develop towards high-end and green.