The primary problem, does the gas permeable brick is fired refractory bricks(refractory) ?
Yes. After moulding by casting in the firing of 1450 ° degrees.
gas permeable brick have two types:built-in type and external mounted type. the built-in gas permeable brick and the external mounted gas permeable brick are usually made by fire burning, and small part of bricks are made by the low temperature heat.
