The inner walls and floors of certain heat systems are typically lined with what material?

Refractory brick is used to line the inner walls and floors of certain heat systems due to its ability to withstand high temperatures without deforming or deteriorating. This material is specifically designed to endure the harsh conditions of heat generation and transfer environments, such as in furnaces, kilns, and other high-temperature industrial processes.

The properties of refractory brick, including its high melting point and low thermal conductivity, allow it to not only protect the structural integrity of the heat system but also to improve the efficiency of heat retention. By minimizing heat loss, refractory brick contributes to maintaining optimal operational temperatures, ensuring that the system operates effectively and safely.

While concrete and steel may also be used in construction, they do not possess the same level of temperature resistance as refractory brick. Insulation foam, on the other hand, is primarily used for thermal insulation rather than structural lining in high-heat applications.