ʻO nā pōhaku ahi silika no nā mea hoʻoheheʻe silika, ʻo ka pōhaku silica kahi ʻano o nā huahana refractory maikaʻi me ka ʻoi aku o 93% SiO2 ʻike. ʻO ka silicate refractory brick he mau hiʻohiʻona maikaʻi loa o ke kūpaʻa maikaʻi ʻana i ka corrosion acid, conductivity wela nui, refractoriness kiʻekiʻe ma lalo o ka ukana ma luna o 1620 ℃. a me ka silica bricks i fratures o ka waika ikaika slag erosion kū'ē, kiʻekiʻe refractoriness ma lalo o ka ukana, a me ka leo paʻa ma kiʻekiʻe wela. Hoʻohana nui ʻia ka silicon rerfractory brik i ka umu coke, open hearth, glass kiln, ceramic kiln, blast furnace, etc.