Production and sale of new refractory bricks in Varamin, Tehran Selling all kinds of refractory bricks in gray, white, brown colors Refractory brick is a type of brick that is produced from porcelain and refractory clay and has a dense and delicate molecular structure. And the way to produce this type of brick is that first the stones are ground and then it is turned into soft soil and after 7 days of baking in the oven at a temperature above 1200 degrees Celsius, it is made.