Vacuum circulation degassing insert tube

A vacuum cycle degassing and inserting tube technology, which is applied in the field of vacuum cycle degassing and inserting tubes, can solve the problems of short service life and easy sticky slag, and achieve the effects of reducing sticky slag, prolonging service life and reducing erosion

Active Publication Date: 2014-05-07
PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the shortcomings of the existing vacuum circulation degassing insertion tubes that are easy to stick to slag and have a short service life, and provide a vacuum circulation degassing insertion tube that is not easy to stick to slag and has a long service life.

Method used

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  • Vacuum circulation degassing insert tube

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Embodiment Construction

[0024] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0025] In the present invention, for the convenience of description, some orientation words are used, such as "upper end", "lower end", "upper part", "lower part", etc. The term used to describe the mutual positional relationship of each component in terms of vertical or gravity direction.

[0026] figure 1 is a longitudinal sectional view of a vacuum cycle degassing insert according to the present invention.

[0027] Such as figure 1 As shown, the vacuum cycle degassing insertion tube according to this embodiment includes a flange 1, a steel structure 2, an Al 2 o 3 Casting layer 3, Al 2 o 3 - C brick 4, Mg-Cr brick layer 5, rivet 6 and anchor claw 7.

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Abstract

The invention discloses a vacuum circulation degassing insert tube used for external refining RH devices; an annular groove is disposed on the outer wall of the insert tube; Al2O3-C bricks (4) are disposed in the annular groove. With the characteristic that the Al2O3-C refractory material is not easy to be moisturized by slag, the erosion of the vacuum circulation degassing insert tube caused by slag is reduced, and the purpose of bonded slag reduction is realized; therefore, the service life of the vacuum circulation degassing insert tube is prolonged.

Description

technical field [0001] The invention relates to a vacuum circulation degassing insertion tube, in particular to a vacuum circulation degassing insertion tube used in an RH refining device outside a furnace. Background technique [0002] Nitrogen and hydrogen elements in steel have adverse effects on its properties. Nitrogen causes blue embrittlement and aging embrittlement of steel, and hydrogen causes hydrogen embrittlement and corrosion of steel. Therefore, the molten steel must be degassed during the smelting process. The existing vacuum treatment methods include: RH method, that is, the vacuum cycle degassing method invented by German Thyssen Steel Company in 1957; RH-OB method, a new technology obtained by Nippon Steel in Japan in 1978 by adding heating function on the basis of RH method ; RH-KTB method, also known as Kawasaki top-blown oxygen vacuum degassing method, invented by Kawasaki Company in Japan in 1988; RH-PB method, cycle degassing powder spraying method. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/10
Inventor 李龙陈炼戈文荪曾建华陈永杨森祥杜利华王文刚
Owner PANZHIHUA IRON & STEEL RES INST OF PANGANG GROUP
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