Silica suitable for refractory materials is primarily quartzite, which can be categorized into crystalline and cemented silica based on its organizational structure. Generally, crystalline silica has a higher purity, higher raw material density, larger quartz crystal grains, and a slower transformation rate when heated. Cemented silica often contains a small amount of impurities, has a relatively lower purity, and the quartz grains in cemented silica have smaller crystals, with more binder content. They transform more quickly when heated. Therefore, it is necessary to formulate a reasonable production process based on the characteristics of the silica raw material to produce silicate bricks suitable for different applications. Both crystalline and cemented silica have their own advantages and disadvantages. Blending the two to leverage their respective strengths is also a good choice.