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Vacuum oxygen decarburization refining furnace smelting stainless steel denitrification method, the carbon content of stainless steel water before treatment in vacuum oxygen decarburization refining furnace is required to be controlled at more than 0.30%, after oxygen desiliconization, carbon, oxygen content in molten steel.
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Vacuum degassing is carried out in the furnace body under a special vacuum environment. After a series of process operations, the product can achieve the specified effect.
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Ladle refining furnace (Ladle refining furnace) refers to equipment that has both the heating and refining functions of a steelmaking furnace. It is an important metallurgical equipment used for refining molten steel melted in primary furnaces (electric arc furnace, open hearth, converter), and can adjust the temperature of molten steel, process buffering, and meet continuous casting and continuous rolling requirements.
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1. Undertake the original partial refining function of primary refining furnace, complete partial steelmaking reaction under the best thermodynamic and kinetic conditions, and improve the production capacity of monomer equipment; 2. Uniform molten steel and accurate control of steel composition; 3. Accurately control the temperature of molten steel to meet the requirements of continuous casting production;
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In order to homogenize the composition and temperature, the gas stirring process in the ladle appeared. The most striking is the adoption of secondary refining, which greatly improves the output and quality of steel. However, what is the main task and purpose of secondary refining? The composition of molten steel, decarburization, deslagging and refining of molten steel shall be adjusted according to the target of molten steel, molten steel melting, deslagging and refining.
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Secondary refining refers to the refining outside the traditional steelmaking furnace (such as open hearth furnace, refining furnace and electric furnace). The main tasks of refining are deoxidation, desulfurization, dephosphorization, decarburization, inclusion removal, alloying and fine adjustment of composition. Statistics on the world crude steel output show that the world crude steel output has continued to grow in ups and downs in the past 30 years.
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Vacuum degassing treatment is used to reduce dissolved gas components (e.g. hydrogen, oxygen, nitrogen) in steel to improve the performance of steel. Liquid steel comes from primary metallurgical production steps, and the capacity of ladle is usually 20-200 tons. The liquid steel is covered with slag to prevent reaction with the atmosphere.
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The conventional equipment of ladle furnace includes: LF, VD, VOD, etc. It is the most widely used refining equipment outside the furnace in the world. It’s used to refine the molten steel melted in the primary refining furnace (medium frequency furnace, electric arc furnace, converter), and can adjust the molten steel temperature and buffer the process.
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