Method of producing super low carbon steel using vacuum degassing

An ultra-low carbon steel, vacuum degassing technology, applied in the field of vacuum refining, can solve the problem of reduced decarburization capacity, and achieve the effect of improving decarburization performance, reducing rolling, and saving investment in equipment renovation
CN1410559AInactive Publication Date: 2003-04-16武钢集团有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
武钢集团有限公司
Publication Date
2003-04-16
Estimated Expiration
Not applicable · inactive patent

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Abstract

A process for preparing ultralow-carbon steel by vacuum degassing features that the argon flow and the vacuum level are dependent on the service age of the furnace, that is, for the initial 20 batches, the argon flow is matched with inner diameter of insertion-in tube, and for the following batch whose decarbonizing time is longer than 5 min, the argon flow is increased by more than 20%. Before decarbonizing the molten steel, the vacuum chamber is depressurized in advance. Within 0-10 min after beginning decarbonization, the depressurizing speed is increased.
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Description

technical field

[0001] The invention relates to a method for producing ultra-low-carbon steel by vacuum degassing, in particular to a method for producing ultra-low-carbon steel with carbon content less than 15ppm by using RH vacuum degassing equipment, and belongs to the field of vacuum refining. Background technique

[0002] At present, iron and steel enterprises generally use vacuum degassing treatment to produce ultra-low carbon steel. In order to improve the decarburization production efficiency of this type of steel, technicians have proposed various methods. For example, when a steel factory uses the RH vacuum degassing equipment imported from Germany to produce ultra-low carbon steel, in the decarburization process of each furnace in the whole furnace service, the input of the gas conduit installed in the insertion pipe and the initial design inner diameter of the insertion pipe Matching argon gas flow, but the disadvantage of this operation method is that after a ce...

Claims

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