High strength, good thermal stability, impact resistance, scouring resistance, wear resistance, long service life by the combined technology of low cement and adding superfine powder and efficient dispersant. Excellent raw materials and high temperature performance, castable refractoriness reaches 1790 °C. Mixing by machine, convenient construction, the construction period is greatly shortened, and the economic benefit is remarkable.
　　Application: Cement kiln preheater lining, cooling machine lining, pipe lining, coal injection gun wrapping, kiln mouth, and high temperature parts. Prefabricated into various sizes and also can be applied to spraying construction (preheater lining).

　　Calcined flint clay for refractory, flint clay
　　Coke stone, a high quality hard refractory clay.The raw ore is gray, gray and gray black, with fine structure and high hardness. It is not dispersed in water and has low plasticity.It is formed by the calcination of the pyrogemite ore at high temperature. The content of Al2O3?in the calcined pyrogem is about 44%, and the content of Fe2O3?is not more than 2%.Stable composition, uniform texture, compact structure, low water absorption, shell shaped section, white, used to produce high quality clay refractory.The technical term is grade I hard clay clinker, the main chemical components are Al2O3?and SiO2, and a small amount of Fe2O3?and trace of Na2O and K2O are kaolin.
　　Applications:
　　Calcined flint clay is mainly used for manufacturing high-quality refractory products, refractory castable, sagger, kiln furniture, crucibles, ceramic fiber,?precision casting sand, ceramics products, etc.