Abstract: A refractory block for forming a wall structure comprising a body of cast refractory material. The body has a front face, a back face, a top face, a bottom face, and two opposing side faces. The body further has a projection formed on the top face and a recess formed in the bottom face, the projection being dimensioned to be received within the recess such that a projection on a block can be received in a recess on a block thereabove. A refractory anchor is embedded within the body. The anchor has a portion extending from the body through the back face.

Abstract: Rotary kiln heat exchangers having precast hub and leg assemblies are disclosed. The hub and leg assemblies include interlocking features which secure the heat exchanger components together. A method of installing such heat exchangers in rotary kilns is also disclosed. Installation is relatively fast and simple, and the heat exchangers are capable of withstanding the harsh operating conditions of rotary kilns for extended periods of time.

Abstract: Rotary kiln heat exchangers having precast hub and leg assemblies are disclosed. The hub and leg assemblies include interlocking features which secure the heat exchanger components together. A method of installing such heat exchangers in rotary kilns is also disclosed. Installation is relatively fast and simple, and the heat exchangers are capable of withstanding the harsh operating conditions of rotary kilns for extended periods of time.