Heat treatment furnaces are divided into annealing furnaces, quenching furnaces, tempering furnaces, normalizing furnaces, and quenching and tempering furnaces. They are mainly used for annealing of large carbon steel and alloy steel parts; tempering of surface hardened parts; stress relief annealing, aging and other heat treatment processes for weldments. Heating methods include electric heating, oil, gas, coal, and hot air circulation. Annealing furnace is a new type of heat exchange equipment. The copper rod roller annealing furnace is an energy-saving periodic operation furnace with a super energy-saving structure, using a fiber structure, and saving 60% of electricity.