Heating furnaces are widely used in petroleum, chemical industry, metallurgy, machinery, heat treatment, surface treatment, building materials, electronics, materials, light industry, daily chemicals, pharmaceuticals and many other industries. In the metallurgical industry, heating furnace is used to refer to the industrial furnace that heats the metal to the forging temperature, including continuous heating furnace and chamber heating furnace. The heating furnace for metal heat treatment is also called heat treatment furnace.