Argon blowing gun for molten steel refining

A technology for blowing argon guns and molten steel is applied in the field of molten steel refining devices, which can solve the problems of excessive erosion, shortening the service life of the gun body, and cracking at the slag line.

Inactive Publication Date: 2015-07-08
SHANGHAI BAOMING REFRACTORIES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the argon blowing gun is used in the ladle, the slag line part is more severely eroded than the part immersed in molten steel. If the gun body is also made of corundum at the slag line

Method used

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  • Argon blowing gun for molten steel refining
  • Argon blowing gun for molten steel refining
  • Argon blowing gun for molten steel refining

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0030] Example 1

[0031] Such as figure 1 As shown, according to Embodiment 1 of the present invention, an argon blowing gun 1 for molten steel refining is provided. The argon blowing gun is configured to include a gun core 10 and a gun body 30. The gun core 10 is used as an argon blowing tube of the gun body, and the gun body 30 is wrapped around the gun core 10 and used as a refractory layer of the argon blowing gun. by figure 1 It can be seen that the gun body 30 includes three parts from bottom to top, namely: the molten steel immersion part 31, the slag line part 33 and the uppermost part 35, wherein the three parts form the gun body 30 by compound casting.

[0032] In this embodiment, the part 31 immersed in molten steel is made of corundum, and the material of the slag line part 33 is different from that of the part immersed in molten steel 31. It uses a material with good thermal shock resistance-aluminum spinel, and is located at the most The upper part 35 above is mad...

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PUM

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Abstract

The invention relates to an argon blowing gun for molten steel refining. The argon blowing gun comprises a gun core and a gun body coating the gun core. The gun body comprises a molten steel immersion part obtained by composite casting, a slag line part and an upper part at the top surface. The molten steel immersion part is prepared from corundum. The slag line part has thermal shock-resistant stability better than that of a corundum material. The slag line part of the argon blowing gun body is prepared from a material with better thermal shock-resistant stability so that cracks at the slag line part are effectively reduced, synchronous argon blowing gun melting loss is realized and an integral life of the argon blowing gun is prolonged.

Description

technical field [0001] The invention relates to a molten steel refining device, in particular to an argon blowing gun for molten steel refining. Background technique [0002] As we all know, in the steelmaking process, the gun body of the argon blowing gun needs to be partially immersed in molten steel for argon blowing and stirring. Usually, the gun body of the existing argon blowing gun is made of the same material, such as corundum, at the slag line part and the molten steel immersion part. However, when the argon blowing gun is used in the ladle, the slag line part is more severely eroded than the part immersed in molten steel. If the gun body is also made of corundum at the slag line part, the low thermal shock resistance will be caused by the dense corundum. As a result, the slag line is cracked and eroded too quickly, thereby reducing the overall service life of the gun body. Contents of the invention [0003] In order to overcome the above problems in the prior a...

Claims

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Application Information

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IPC IPC(8): C21C7/072C04B35/66C04B35/10
Inventor 唐龙燕李家斌曹冲
Owner SHANGHAI BAOMING REFRACTORIES CO LTD
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