Air heating furnace is a main auxiliary equipment to be used for flash drying, sponging drying, fluidized drying, tower drying, tunnel drying, and rotary drying. It is being used in agricultural industry, agro-product and food processing industry, metallurgical industry building industry and some other industries widely. When the hot wind produced by the Air heating furnace being used to dry materials, the wind will heat the material and transpire the moisture, then take away the vapor, so the material being dried will reduce or lose the content of moisture. The function of the Air heating furnace will influence the technical and economic target of the drying equipment directly.

Air heating furnace is classified by the difference of fuel, Fuel consumption method, and the way of heating.