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Device and method for purifying molten steel in tundishes

A purification device and tundish technology, which is applied in the field of steelmaking and continuous casting, can solve the problems of inability to achieve purification effect, decline in the removal effect of inclusions, high power, etc., so as to avoid quality defects, avoid erosion and erosion, and improve the effect and efficiency Effect

Active Publication Date: 2014-12-24
ANGANG STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the centrifugal tundish technology, the rotation of molten steel is provided by the electromagnetic field, which requires high power consumption; in addition, when the ladle nozzle is located at the center of rotation, the impact flow of the ladle nozzle will form downward, then upward, and then to The complex flow in the vertical direction will redisperse the centripetally gathered inclusions, so that the removal effect of inclusions will be significantly reduced, and even the purification effect will not be achieved.

Method used

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  • Device and method for purifying molten steel in tundishes
  • Device and method for purifying molten steel in tundishes
  • Device and method for purifying molten steel in tundishes

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Embodiment 1

[0023] see figure 1 , figure 2 and image 3 , The method for purifying molten steel in the tundish is: place the drainage part of the purifying device under the ladle nozzle 12 and between two retaining walls 13 . The molten steel flows out from the ladle nozzle 12, and the strong impact kinetic energy of the ladle flow is used to convert the vertical impact flow into a horizontal tangential flow in the drainage chamber 5, and spray from the tangential nozzle 9 along the side wall 7 of the drainage chamber. out, rushes obliquely upwards into the swirl chamber 4 through the sliding jump board 10, drives the molten steel in the swirl chamber 4 to perform an axisymmetric rotational movement, and then utilizes centrifugal force to drive the non-metallic inclusions in the swirl chamber to gather toward the center of rotation, The concentration of inclusions in the center of rotation is significantly increased, thereby promoting the collision aggregation and growth of inclusions,...

Embodiment 2

[0026] The method for purifying the molten steel in the tundish is as follows: the drainage part of the purifying device is placed under the nozzle 12 of the ladle and between two retaining walls 13 . The molten steel flows out from the ladle nozzle 12, and the strong impact kinetic energy of the ladle flow is used to convert the vertical impact flow into a horizontal tangential flow in the drainage chamber 5, and spray from the tangential nozzle 9 along the side wall 7 of the drainage chamber. out, rushes obliquely upwards into the swirl chamber 4 through the sliding jump board 10, drives the molten steel in the swirl chamber 4 to perform an axisymmetric rotational movement, and then utilizes centrifugal force to drive the non-metallic inclusions in the swirl chamber to gather toward the center of rotation, The concentration of inclusions in the center of rotation is significantly increased, thereby promoting the collision aggregation and growth of inclusions, and quickly floa...

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Abstract

The invention discloses a device for purifying molten steel in tundishes. The device comprises a base, a cyclone portion and a flow guide portion. The cyclone portion and the flow guide portion are fixed to the upper side of the base; the cyclone portion and the flow guide portion are integrally formed, the cyclone portion is provided with an opening hollow inner cavity which is a cyclone cavity; the cyclone cavity is provided with side walls, two symmetric through flow guide ports are formed in the bottom of the cyclone cavity, two symmetric through tangential nozzles are arranged at the bottom of the cyclone cavity, and a slide jump plate is arranged on the lower portion of the cyclone cavity; the flow guide portion is provided with an opening hollow inner cavity which is a flow guide cavity; the flow guide cavity with a thick upper portion and a narrow lower portion is provided with side walls and tangential side walls and is communicated with the cyclone cavity via the tangential nozzles. The device has the advantages that steel slag which flows into the tundishes can quickly float up under the effect of the device, accordingly, slag entrapment can be prevented, large nonmetallic inclusion can be removed, effects of purifying the molten steel in the tundishes can be improved, and the problem of deficiency of devices for efficiently removing inclusion in molten steel and purifying the molten steel in tundishes at present can be solved.

Description

technical field [0001] The invention relates to a new device and method for removing inclusions and purifying molten steel in a tundish, belonging to the technical field of steelmaking and continuous casting. Background technique [0002] Continuous casting tundish, as a key equipment of efficient continuous casting process in iron and steel industry, plays an important role in stabilizing continuous casting production and improving the quality of continuous casting slab. [0003] During the continuous casting process, the molten steel in the ladle continuously flows into the tundish. Due to the kinetic energy of the molten steel, the flow of molten steel in the nozzle area of ​​the ladle is extremely unstable, and the steel slag is often involved in the molten steel, resulting in the internal quality of the subsequent continuous casting slabs. defect. At the same time, the flow of molten steel in the tundish is turbulent and unstable, and the mixing effect of molten steel ...

Claims

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Application Information

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IPC IPC(8): B22D1/00B22D11/114
Inventor 唐雪峰黄玉平马立国李平
Owner ANGANG STEEL CO LTD
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