Heating furnace is a kind of equipment specially used for heating product materials and produced workpieces. Different from drying equipment, the main purpose of heating furnace is not to heat general materials, but to heat metal products through high temperature without oxidation or less oxidation, so that they can be further processed.
With the development of science and technology, there are more and more types of heating furnaces, among which the most common are tubular heating furnace and regenerative heating furnace. The working principle of the heating furnace is to work in the way of phase change heat exchange. In a closed container without non condensable gas, the intermediate substances are heated by the heat generated by fuel combustion, such as turning water into water vapor, and then the water vapor will enter the gas phase space, and then reach the outlet to transfer its heat to the working medium in the coil of the condensing heat exchanger.
Then the water vapor condenses into liquid, falls back to the liquid phase space, is heated and evaporated by fuel combustion again, and then continuously brings heat to the working medium.
Heating furnace is divided into fuel heating furnace, resistance heating furnace, induction heating furnace, microwave heating furnace, etc. it is widely used in many industries such as petroleum, chemical industry, metallurgy, machinery, heat treatment, surface treatment, building materials, electronics, materials, light industry, daily chemical industry, pharmacy and so on.
The heating furnace has many uses and is generally used most in industry. Because of its unique characteristics, the heating furnace can heat various industrial products without manual operation, which greatly reduces the safety and the possibility of safety accidents. Moreover, the high temperature of the heating furnace can not be borne by ordinary materials, and the general temperature is above 200 ℃.
There are many classifications of heating furnaces, and different heating furnaces are used for different purposes. For example, heating furnaces as smelting equipment include medium frequency electric furnace, IGBT medium frequency electric furnace, power frequency electric furnace, induction electric furnace, etc., which are applied to the smelting of all kinds of steel and iron; Foundry industry (sand casting, precision casting, centrifugal casting, gravity casting, etc.); Smelting and pouring of non-ferrous metals (copper, aluminum, zinc, magnesium, tin, silver, gold, neodymium iron boron, etc. and various alloys).
Heating furnace as thermal insulation equipment: frequency thermal insulation furnace, thermal insulation heating furnace and power frequency thermal insulation furnace. Its application field: thermal insulation processing of iron and steel metallurgy; Casting industry insulation pouring; Non ferrous metal insulation processing, etc.