Industrial furnaces are thermal equipment used in industrial production to heat materials or workpieces by using the heat of fuel combustion or electrical energy conversion. Broadly speaking, a boiler is also an industrial furnace, but it is customary not to include it in the scope of an industrial furnace.
Industrial furnaces are divided into two types according to the heating method: one is a flame furnace (also called a fuel furnace), which uses the heat of combustion of solid, liquid or gas fuel in the furnace to heat the workpiece; the second is an electric furnace, which is in the furnace Convert electrical energy into heat for heating. Industrial furnaces are divided into two categories according to the thermal system: one is an intermittent furnace, also known as a periodic furnace, which is characterized by the fact that the furnace is not divided into temperature zones, and the furnace is produced in one or two shifts. Temperature changes, such as various chamber furnaces, trolley furnaces, well furnaces, bell furnaces, etc .; Second, continuous furnaces, which are characterized by the division of temperature zones in the furnace, generally by preheating, heating (high temperature ), Soaking (heat preservation) consists of three sections, the furnace is continuous production of three shifts, the temperature in each section of the industrial furnace heating process can be considered unchanged, such as two or three-stage continuous heating furnace , Pusher heating furnace and heat treatment furnace, ring furnace, walking furnace, vibrating hearth furnace, cupola furnace and lime kiln.
In the casting workshop, there are cupola, induction furnace, resistance furnace, electric arc furnace, vacuum furnace, open hearth, crucible furnace, etc. for smelting metal; sand drying furnace, iron alloy baking furnace and casting annealing furnace for baking sand mold; etc. in the forging workshop There are various heating furnaces for heating steel ingots or billets before forging, and heat treatment furnaces to relieve stress after forging; in metal heat treatment workshops, there are various annealing, normalizing, quenching and tempering heat treatment furnaces that improve the mechanical properties of workpieces ; In the welding workshop, there are pre-welding furnaces and post-weld tempering furnaces for welding parts; in powder metallurgy workshops, there are heating furnaces for sintered metals. Application of other industries, such as metal melting furnaces, ore sintering furnaces and coking furnaces in the metallurgical industry; distillation and cracking furnaces in the petroleum industry; generators in the gas industry; cement kilns and glass melting and glass annealing furnaces in the silicate industry; food Industrial baking ovens, etc.