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Molten steel argon blowing method used at steel-making continuous casting workstation

A technology of steelmaking continuous casting and molten steel, which is applied in the field of argon blowing of molten steel in steelmaking continuous casting stations, which can solve problems such as limited time and achieve the effect of improving quality

Inactive Publication Date: 2013-09-18
INNER MONGOLIA BAOTOU STEEL UNION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, blowing argon into molten steel is generally carried out at the molten steel refining station, and due to the constraints of the production rhythm, the time for blowing argon is limited

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0014] Example 1: The flow rate of argon gas blown into the ladle is: 30 Nl / min, the duration of blowing in argon gas is: 5min, and the molten steel in this ladle stops blowing 5min before the pouring of a ladle of molten steel on the side of the rotary table into argon.

[0015] Under the same conditions, the oxygen content of molten steel that has been softly blown with argon on the ladle turret of the continuous casting station is 2.0 ppm lower than that of molten steel that has not been softly blown with argon at the continuous casting station.

Embodiment 2

[0016] Example 2: The flow rate of argon gas blown into the ladle is: 45 Nl / min, the duration of blowing argon gas is: 7min, and the molten steel in this ladle stops blowing 5 minutes before the pouring of a ladle of molten steel on the side of the rotary table into argon.

[0017] Under the same conditions, the oxygen content of the molten steel that has been soft blown with argon on the ladle turret of the continuous casting station is 2.2 ppm lower than that of the molten steel that has not been softly blown with argon at the continuous casting station.

Embodiment 3

[0018] Embodiment 3: The flow rate of argon gas blown into the ladle is: 80 Nl / min, the duration of blowing in argon gas is: 8min, and the molten steel in this ladle stops blowing 5 minutes before the pouring of a ladle of molten steel on the side of the rotary table into argon.

[0019] Under the same conditions, the oxygen content of the molten steel that has been soft blown with argon on the ladle turret of the continuous casting station is 2.7ppm lower than that of the molten steel that has not been softly blown with argon at the continuous casting station.

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PUM

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Abstract

The invention relates to a molten steel argon blowing method used at a steel-making continuous casting workstation. The molten steel argon blowing method used at the steel-making continuous casting workstation is characterized by comprising the following steps: after a steel ladle arrives at an intermediate ladle turret, blowing argon into molten steel in a steel ladle on the other side of the turret when a steel ladle on one side of the turret is cast, wherein the flow of the argon blown into the steel ladle is 30-95 Nl / min, and the argon blowing duration time is 5-10 mines; and 5 mines before stopping casting the steel ladle on one side of the turret, stopping blowing argon into the molten steel of the steel ladle. The molten steel argon blowing method used at the steel-making continuous casting workstation has the advantages as follows: when the molten steel on one side of the turret is cast, soft argon blowing operation is performed on the molten steel on the other side of the turret, so that the waiting time of the molten steel at the turret is used, and the quality of the molten steel is improved; and under the same condition, the oxygen content of the molten steel treated by the soft argon blowing operation at the steel ladle turret at the continuous casting workstation is 2-3ppm (1ppm refers to the mass ratio of solute to solution of 1*10 to the power of -6) lower than that of the molten steel which is not treated by the soft argon blowing operation at the continuous casting workstation.

Description

technical field [0001] The invention relates to a method for blowing argon into molten steel at a steelmaking continuous casting station, and belongs to the field of steelmaking produced in the metallurgical industry. Background technique [0002] In the process of steelmaking in the metallurgical industry, blowing argon into molten steel is an important link. Argon is very important to molten steel and is known as "soft gold". During the refining process of molten steel, argon plays a very important role in promoting the uniform temperature of molten steel, promoting the uniform composition of molten steel, and facilitating the floating of inclusions. However, the blowing of argon into molten steel is generally carried out at the molten steel refining station, and due to the restriction of the production rhythm, the time for blowing argon is limited. [0003] According to "The Effect of Refining Process on the Quality of High-Carbon Chromium Bearing Steel" published by Liu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/117C21C7/072
Inventor 李峰赵明泉
Owner INNER MONGOLIA BAOTOU STEEL UNION