There are three main types of aluminum smelting furnaces: reverberatory furnaces, rotary furnaces, and induction furnaces (core induction furnaces and coreless induction furnaces). The furnace lining is mostly constructed with clay bricks, high-alumina refractory bricks , and corundum mullite bricks. High-alumina refractory castables and refractory plastics can also be used for casting or ramming. Refractory Materials for Aluminum Smelting Furnace Linings Reverberatory furnac