per unit area. The number of anchors depends on operating conditions and the refractory materials. The choice of an anchor's material, shape, quantity, and size has significant impact on the useful life of the refractory. Tundish boards don't require metallic anchors, rather they are stuck together by a special refractory paste and powder. Good practice is to use a combination of paste and powder to make sure the system is leak proof and hold itself together while long duration of castings. See also Fire brick Masonry oven Refraction (metallurgy) References External links Materials Chemical properties Ceramic materials