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Method of purifying molten steel in tundish by gas vortex and molten steel purification device

A purification device and tundish technology, applied in the field of tundish metallurgical process and its devices, can solve the problems of high electric energy, erosion, etc., and achieve the effects of enhancing efficiency, low equipment investment cost, and avoiding molten steel erosion

Active Publication Date: 2014-07-02
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the centrifugal tundish technology, the rotation of the molten steel is provided by the electromagnetic field, which requires high power consumption; in addition, the bottom of the tundish circular cavity is relatively easy to be eroded by the impact flow of the ladle nozzle

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  • Method of purifying molten steel in tundish by gas vortex and molten steel purification device

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Embodiment Construction

[0030] Preferred embodiments of the present invention are described in detail as follows:

[0031] In this example, see Figure 1 ~ Figure 3, in the present embodiment, the molten steel purifying device of the method for purifying molten steel in the tundish by gas swirl flow, the space for accommodating molten steel in the tundish 10 is composed of the molten steel swirl chamber 1 and the molten steel distribution chamber 8, and the molten steel distribution chamber 8 There is a nozzle 14 at the bottom, and the molten steel in the molten steel distribution chamber 8 is injected into the casting container by controlling the opening of the nozzle 14. The molten steel swirl chamber 1 is in the shape of a truncated cone, and the inner diameter of the lower bottom of the molten steel swirl chamber 1 is 0.5 m, the inner diameter ratio of the upper and lower bottoms of the molten steel swirl chamber 1 is 1.2, the height of the molten steel swirl chamber 1 is 0.8m, the ladle nozzle 2...

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Abstract

The invention discloses a method of purifying molten steel in a tundish by gas vortex. According to the method, inert gas is blown into a round cavity of the tundish in a direction approximate to horizontal tangential direction of molten steel vortex, the molten steel is driven to rotate nearly horizontally, inclusions in the molten steel are driven to move and gather to the center of rotation by centrifugal force of the rotation of the molten steel, the inclusions collide and bulge and float to the surface of the molten steel, the inclusions are then adsorbed and removed by a slag layer, and dissolved gas in the molten steel separates from the inside of the molten steel and floats up to be discharged. The invention further discloses a molten steel purification device. A blow system is disposed at an outlet of a nozzle of an eccentric tundish and used for rotating the molten steel in a vortex chamber horizontally. Compared with the method of driving the molten steel in the tundish to rotate by rotational magnetic field, the method and the molten steel purification device have the advantages that energy consumption is greatly and significantly saved, the inclusions and gas in the molten steel are driven to float up to be removed, effect of purifying the molten steel is greatly improved, the process is simple and easy, and investment on production equipment is low.

Description

technical field [0001] The invention relates to a tundish metallurgical process and a device thereof, in particular to a purification process and a device for stirring molten steel in a tundish with an inert gas, which is applied in the technical field of pure steel casting. Background technique [0002] Continuous casting technology has developed rapidly in the world because of its great advantages in continuous production. The continuous production of continuous casting machines and the quality of continuous casting slabs have attracted more and more attention. The quality of molten steel, especially the content of non-metallic inclusions in molten steel, has become an important indicator that everyone cares about because of its impact on continuous production and the quality of continuous casting slabs. As the last refractory container before the molten steel enters the mold for casting, the shape and structure of the tundish will have a greater impact on the composition ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22D11/117
Inventor 钟云波王怀方贻鹏王迎彬李强黄靖文任光宇任忠鸣
Owner SHANGHAI UNIV
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