The construction modes of the common refractory castables are as follows: One is cast-in-site direct molding, the other is a prefabricated forming. 

There are three types of cast-in-site direct molding: Integral cast molding, (such as small chamber furnace); Part of cast molding (such as top of the heating furnace) and local cast molding or repair (such as the leveling of the wall and arch that are more difficult for bricklaying operation).