Silica brick is a common refractory material made from silica, widely used in industrial production due to its excellent properties such as high temperature strength, high softening temperature under load, good resistance to high-temperature creep, and strong resistance to acidic slag erosion.

Silica suitable for refractory materials is primarily quartzite, which can be categorized into crystalline and cemented silica based on its structural type. Generally, crystalline silica boasts higher purity, greater raw material density, and larger quartz crystal grains, resulting in slower transformation rates when heated. Cemented silica, however, often contains trace impurities, lower purity, and smaller quartz crystal grains, with more binder content, leading to faster transformation rates when heated. Therefore, it is essential to formulate a reasonable production process based on the characteristics of the silica raw material to produce silica bricks suitable for various applications. Both crystalline and cemented silica have their own advantages and disadvantages, so blending them for composite batching to leverage their respective strengths is also a favorable option.