Heating furnace is the heating of materials or parts of equipment. According to the heat source division of a fuel heating furnace, resistance furnace, induction furnace, microwave heating furnace. Application in the petroleum, chemical, metallurgy, machinery, heat treatment, surface treatment, building materials, electronics, materials, light industry, daily chemical, pharmaceutical and other industries.
The heating furnace is used for heating the billet thermal equipment or a small ingot rolling or forging steel. The heating furnace is composed of furnace wall, bottom and top etc.. It is used in the temperature is not high, generally at 1400 DEG C a. For continuous or ring heating furnace, the temperature of each part is basically constant, can be divided into low temperature, medium temperature, high temperature of three segment bands, respectively, become the preheating and heating zone and are tropical, the temperature of 800~900 DEG C C, respectively 1150~1200 and 1200~1300 degrees. Lining damage is mainly because the temperature fluctuation of intermittent operation and shutdown of the boiler start-up caused, resulting in lining deformation and thermal spalling. The furnace bottom and furnace wall root damage is mainly iron oxide skin residue and brick melting occur chemical reaction caused by. Therefore, we should choose different refractory materials according to the different parts of the different conditions.
In the metallurgical industry, the heating furnace is used to refer to the metal is heated to rolling into the industrial furnace temperature forging, including continuous heating furnace and furnace etc.. Metal heat treatment heating furnace and the other called heat treatment furnace. Before blooming heating ingot or the furnace internal temperature of ingot homogeneous called soaking pit. Broadly speaking, the heating furnace also comprises the soaking furnace and heat treatment furnace.
Continuous heating furnace comprises a pusher type furnace, walking beam furnace, rotary hearth furnace, furnace chamber type continuous heating furnace, but the habit is often referred to as the pusher type furnace. Continuous heating furnace for heating the metal most before rolling billet, a few for forging and heat treatment. The main features are: the continuous movement of the billet in the furnace in rolling rhythm, furnace gas is continuous flow in the furnace; the general situation, the section size, charge the variety and yield under the condition of invariable, metal material of each part of the furnace temperature and furnace temperature basically does not change with time and only along the length of the furnace change.
