Some of the important aspects involved in designing a furnace relate generally to (I) robustness of construction
(2) ease of control, (3) ease of maintenance and (4) maximum utilisation of heat energy produced in the furn- ace. With a view to ensuring improved performances, the reheating and heat treatment furnaces are now being designed as complicated and precise units In place of simple bricklined boxes, hitherto employed. The demand on the quality of refractories for application in the different zones of such furnaces have become increasingly
stringent