refractory is heat expansion and cold contraction, it is also called refractory?brick, can resist high temperature up to 580-770 degrees. Mainly used for the smelting furnace. faint?yellow or brown, when it is high temperature, it will squeeze toward the center. Refractory material made of refractory clay or other refractory raw materials. the shortened form of fefractory brick is brick. vault will be extrusion deformation. Refractory material with a certain shape and size
Refractory is heat expansion and cold contraction, when it is high temperature, it will squeeze toward the center and the vault will be deformation .
