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What are the components of the heating furnace? What is the classification standard

by:Kehua     2022-08-02
Speaking of heating furnaces, I believe many of my friends are not unfamiliar. So, what are the components of heating furnaces? What are the classification standards? This is a question that many friends want to know. With these questions, the editor of Kehua website comes to talk Let us briefly introduce. The composition of the heating furnace What are the composition of the heating furnace? According to the furnace temperature distribution, the furnace chamber is divided into a preheating section, a heating section and a soaking section along the length direction. The lower furnace temperature at the feeding end is the preheating section, and its function is to use the heat of the furnace gas to improve the thermal efficiency of the furnace. The heating section is the main heating section, and the temperature of the furnace gas is relatively high to facilitate rapid heating. The soaking section is located at the discharge end, and the difference between the temperature of the furnace gas and the temperature of the metal material is small, ensuring that the section temperature of the discharged billet is uniform. What is the classification standard of heating furnaces? Heating furnaces include continuous heating furnaces and chamber heating furnaces. The heating furnace for metal heat treatment is also called heat treatment furnace. A furnace that heats an ingot or makes the temperature inside the ingot uniform before blooming is called a soaking furnace. In a broad sense, heating furnaces also include soaking furnaces and heat treatment furnaces. In forging and rolling production, billets are generally heated in an oxidizing atmosphere with a complete combustion flame. The use of an incomplete combustion reducing flame (ie 'self-protective atmosphere') to directly heat the metal can achieve the purpose of no oxidation or less oxidation. This heating method is called open flame or open flame non-oxidative heating, and is successfully used in rotary hearth furnaces and chamber furnaces. Composition of Heating Furnace Continuous Heating Furnace Continuous heating furnaces include push-steel furnaces, walking furnaces, rotary hearth furnaces, chamber furnaces and other continuous furnaces, but they are often referred to as push-steel furnaces. Most of the continuous heating furnaces are used for heating metal billets before rolling, and a few are used for forging and heat treatment. The main features are: the billet moves continuously in the furnace according to the rolling rhythm, and the furnace gas also flows continuously in the furnace; in general, when the section size, variety and output of the furnace charge remain unchanged, the temperature and The temperature of the metal charge in the furnace does not vary substantially with time but only along the length of the furnace. Pusher type continuous heating furnace It is a continuous heating furnace that relies on the pusher to complete the task of conveying materials in the furnace. The billet slides on the furnace floor or on slide rails supported by water-cooled tubes, in which case the billet can be heated on both sides. Furnace bottom water pipes are usually clad with insulating material to reduce heat loss. In order to reduce the 'black mark' on the lower part of the billet caused by the water-cooled slide rail, it is supported on the base wall made of refractory materials. This kind of furnace is called 'water-free cooling furnace'. Step-by-step continuous heating furnace A continuous heating furnace that moves the blank step by step by the upward, forward, downward, and backward movements of the furnace bottom or the water-cooled metal beam. The furnace has a fixed bottom and a walking bottom, or has a fixed beam and a walking beam. The former is called a walking hearth furnace, and the latter is called a walking beam furnace. The walking beam of the heating furnace for steel rolling is usually composed of water-cooled tubes. The walking beam furnace can heat the blank on both sides. Since the 1970s, due to the large-scale rolling mill, the walking beam furnace has been widely used. Compared with the push-steel furnace, its advantages are: flexible material transportation, all the charge can be discharged out of the furnace if necessary; billets are placed at intervals on the furnace bottom or beam, which can be heated evenly faster; completely eliminated It avoids the failure of arch steel and stick steel in push-steel furnaces, so that the length of the furnace is not limited by these factors. The walking beam furnace, which was put into operation in China in 1979, is 32.5 meters long and has a production capacity of 270 tons per hour. All the content about the composition of the heating furnace and the classification standards will be shared with you here. Thank you for your reading and support. If you think this article is helpful to you, you can share it with others, or pay attention to the Kehua website. .
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