Integral self-supporting composite refractory wall modules for refractory structures and methods of forming refractory structure walls of the same

A refractory structure comprising:

• opposed pairs of side and end walls, wherein
• the side and end walls comprise a plurality of interconnected integral self-supporting riser wall sections, wherein
• each riser wall section comprises a plurality of end-to-end interconnected refractory modules which include multiple preformed square parallelepiped refractory blocks bonded to one another by a bonding agent to form the integral self-supporting riser wall sections, wherein
• the refractory blocks of each refractory module are off-set relative to one another so as to establish respective tooth and channel arrangements at opposed ends of the refractory module, wherein the tooth and channel arrangements of one of the refractory modules being interlocked with respective channel and tooth arrangements of other refractory modules adjacently end-to-end interconnected therewith.