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Vacuumizing control method and system of VD mechanical pump

A control method and vacuum pumping technology, which is applied in the field of steelmaking, can solve the problems of reducing the cleanliness of steel, unfavorable insulation protection, and affecting the quality of steel, so as to achieve the effect of improving cleanliness, improving quality, and improving discharge effect

Active Publication Date: 2015-05-06
SHANDONG IRON & STEEL CO LTD
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AI Technical Summary

Problems solved by technology

[0006] The embodiment of the present invention provides a vacuum pumping control method and a vacuum pumping control system of a VD mechanical pump to solve the problem of directly injecting high-flow argon gas at the bottom of the ladle through manual control of the ladle vacuuming process in the prior art. It is easy to cause molten steel slag overflow in the ladle, which will not only cause safety accidents such as equipment damage, but also is not conducive to the isolation protection of the molten steel and the atmosphere by the refining slag after the molten steel in the ladle is broken, and the refining slag absorbs inclusions in the molten steel, thereby reducing the cleanliness of the steel. Degree, the problem that affects the quality of steel

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Embodiment Construction

[0078] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described The embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0079] see figure 1 , is a schematic flowchart of a vacuum control method for a VD mechanical pump provided by an embodiment of the present invention.

[0080] As shown in the figure, the vacuum control method of the VD mechanical pump provided in this embodiment includes:

[0081] Step S100: detecting the position of the tank cover u...

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Abstract

The embodiment of the invention discloses a vacuumizing control method and system of a VD mechanical pump. The vacuumizing control method of the VD mechanical pump comprises the following steps: detecting a position of a tank cover used for covering a vacuum tank after a steel ladle enters the vacuum tank, judging whether the tank cover reaches a preset position in the vacuum tank, when the tank cover reaches the preset position in the vacuum tank, performing pre-vacuumizing treatment in the vacuum tank, and orderly performing in-tank pressure-holding treatment, deep vacuumizing treatment, pre-vacuum-breaking treatment and vacuum-breaking treatment in the vacuum tank after the pre-vacuumizing treatment. The vacuumizing treatment is performed on the molten steel in the steel ladle in the vacuum tank through the vacuumizing control method of the VD mechanical pump, the equipment damage caused by molten steel slag-overflow in the steel ladle is effectively avoided, the impurities and a large amount of gas in the molten steel can be effectively removed, the cleanliness of the molten steel and the quality of the manufactured steel can be effectively improved.

Description

technical field [0001] The invention relates to the technical field of steelmaking, in particular to a vacuum control method and a vacuum control system of a VD mechanical pump. Background technique [0002] The VD (Vacuum Degassing, vacuum degassing) refining method is also called the ladle vacuum refining method. The VD mechanical pump puts the ladle containing the molten steel together in a sealable vacuum tank for vacuuming operation, and at the same time cooperates with the bottom blowing gas stirring of the ladle. The method of removing the gas (hydrogen, nitrogen) content in molten steel is achieved by using the formed vacuum environment and strong bottom blowing gas stirring. [0003] With the development of science and technology, especially the aerospace, national defense, transportation, petroleum and automobile industries have increasingly stringent requirements on steel properties. In order to meet the needs of high strength, long life, corrosion resistance and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/10
Inventor 李丰功张继奎于学文李猛陈良马丙涛孙永喜尹崇丽邵明海张君平吴明洋刘兵刘超群闻小德刘利于辉
Owner SHANDONG IRON & STEEL CO LTD
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