What is the chemical composition of checker bricks which is used in stoves of blast furnace?
Such bricks in cowper stoves serve to store heat from furnace exhaust gas,the carbon monoxide being burnt in the stove and the heat stored in the chequer-work.Once the bricks are heated the direction of gas flow through the stove is reversed so that the stored heat is used to heat air coming into the furnace.In view of this heating/cooling cycle most refractories would break up (spall)fairly rapidly so I think the choice used to be silica brick because it has good spalling resistance,but I’m not certain that the situation is the same now.
