Silica bricks were mainly silicon dioxide as the main ingredient. Content in more than 93 per cent of refractory products, through a quartzite-raw materials and add appropriate amount of mineralization, and is fired at high temperatures the Quartz, a small amount of phosphorus and high-temperature formation of glassy quartz multi-phase of the project.
Silica bricks really belongs to the acid-resistant refractory materials, acid slag corrosion resistance strong, but is strongly alkaline slag eroded and apt to be content AI2O3, K20, Na2o and other oxides and destruction, for oxides such as Cao/Feo/Fe203 have good resistance. Especially silica fire brick load deformation at higher temperatures close to p the melting point of quartz, Fang Shiying (1640-1720 ° c), and so of silica brick refractory temperatures still higher. But things are not perfect, and disadvantages of silica brick is thermal shock temperature is low, so that its scope of application was also significant limitations of the silica tiles are mainly used in coke ovens, glass melting furnaces, acid steel-making furnaces and other heat processing equipment.
