Spiral-flow type turbulence inhibitor with buffering balls for continuous casting tundish

A suppressor and swirl-type technology, applied in the field of turbulence suppressors, can solve the problems of not fully conforming to hydrodynamic characteristics, easily damaged blocks, high inclusions, etc., and achieve the effect of reducing splash, simple structure and high degree of purification

Pending Publication Date: 2020-01-07
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although this patent has obvious effects on the buffering and purification of molten steel in the injection area of ​​the long nozzle, but because the design does not fully conform to the characteristics of fluid mechanics, the side of the crescent-shaped block has edges and corners, and the edges and corners are subjected to thermal stress after the molten steel is heated. Concentrated, easy to be damaged under thermal stress; coupled with the erosion of steel flo

Method used

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  • Spiral-flow type turbulence inhibitor with buffering balls for continuous casting tundish
  • Spiral-flow type turbulence inhibitor with buffering balls for continuous casting tundish
  • Spiral-flow type turbulence inhibitor with buffering balls for continuous casting tundish

Examples

Experimental program
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Effect test

Example Embodiment

[0028] Example 1:

[0029] The depth of the molten steel pool in the middle of a steel plant is 1200mm, the inner diameter of the shroud is 100mm, the insertion depth of the shroud is 500mm, and the height from the shroud outlet to the inner bottom of the tundish is 700mm.

[0030] The four shallow bow-shaped three-dimensional stoppers 3 arranged in a ring around the center of the bottom surface are 20 mm high, and the bottom surface of the cavity is evenly filled with buffer balls with a diameter of 10 mm. The suppressor body 5 is embedded and installed on the bottom 6 of the continuous casting tundish, located directly below the long nozzle 7 of the tundish, its axis coincides with the axis of the long nozzle 7, and the inner bottom surface of the suppressor body 5 is on the same plane superior.

[0031] The cavity in the suppressor body 5 is 140 mm high, the upper opening 1 has a diameter of 300 mm and a height of 28 mm; the cavity 2 below the opening has a hexagonal or oc...

Example Embodiment

[0035] Example 2:

[0036] The depth of the molten steel pool in the middle of a steel plant is 1200mm, the inner diameter of the shroud is 100mm, the insertion depth of the shroud is 500mm, and the height from the shroud outlet to the inner bottom of the tundish is 700mm.

[0037] The four shallow bow-shaped three-dimensional stoppers 3 arranged in a ring around the center of the bottom surface are 50 mm high, and the bottom surface of the cavity is evenly filled with buffer balls with a diameter of 30 mm. The suppressor body 5 is embedded and installed on the bottom 6 of the continuous casting tundish, located directly below the long nozzle 7 of the tundish, its axis coincides with the axis of the long nozzle 7, and the inner bottom surface of the suppressor body 5 is on the same plane superior.

[0038] The cavity in the suppressor body 5 is 233.33mm high, the upper opening 1 has a diameter of 600mm, and the height is 46.67mm; the cavity 2 below the opening has a hexagonal...

Example Embodiment

[0042] Example 3:

[0043] The depth of the molten steel pool in the middle of a steel plant is 1200mm, the inner diameter of the shroud is 100mm, the insertion depth of the shroud is 500mm, and the height from the shroud outlet to the inner bottom of the tundish is 700mm.

[0044] The four shallow bow-shaped three-dimensional stoppers 3 arranged in a ring around the center of the bottom surface are 40 mm high, and the bottom surface of the cavity is evenly filled with buffer balls with a diameter of 24 mm. The suppressor body 5 is embedded and installed on the bottom 6 of the continuous casting tundish, located directly below the long nozzle 7 of the tundish, its axis coincides with the axis of the long nozzle 7, and the inner bottom surface of the suppressor body 5 is on the same plane superior.

[0045] The cavity in the suppressor body 5 is 200.67mm high, the upper opening 1 has a diameter of 500mm, and the height is 40.13mm; the cavity 2 below the opening has a hexagonal...

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Abstract

The invention relates to a spiral-flow type turbulence inhibitor with buffering balls for a continuous casting tundish. An opening is formed in an inhibitor body and communicates with a cavity. Four circularly arranged shallow arched stereoscopic check blocks are arranged in the center of the bottom of the body. The cross section of each shallow arched stereoscopic check block is composed of an arc A1, an arc A2 parallel to the arc A1, an elliptic arc E1 and an elliptic arc E2 in smooth connection with the elliptic arc E1 at the endpoints of two ends. The longitudinal section of the cavity isin the shape of a hexagon or octagon, the cross section of the cavity is round, and the bottom face space of the cavity is evenly filled with the buffering balls. According to the spiral-flow type turbulence inhibitor, during continuous casting starting, molten steel can form rotational flow opposite to the geomagnetic field direction through the circularly arranged shallow arched stereoscopic check blocks, steel flow turbulence kinetic energy is effectively reduced, inclusions can be gathered in the center, and the liquid level is kept stable. The side face arcs of the check blocks are not likely to be washed off by the molten steel; and the buffering balls can buffer the kinetic energy of the molten steel, scouring of the molten steel to the bottom of the inhibitor at the casting starting stage is relieved, and various inclusions in the casting starting process can be adsorbed. The purification degree of the molten steel is high under the combined action of the shallow arched stereoscopic check blocks and the buffering balls.

Description

technical field [0001] The invention relates to a novel turbulence suppressor, which is especially suitable for the swirling flow turbulence suppressor with buffer balls in the tundish injection flow zone in the continuous casting tundish opening process. Background technique [0002] In recent years, my country's high-quality steel has developed rapidly and is widely used in automobiles, petrochemicals, machinery, home appliances, marine equipment and power industries. By 2018, the total output will reach 230 million tons. Due to the increasingly high quality requirements for high-quality steel, the key to improving steel quality is to further reduce the level of non-metallic inclusions in steel and reduce the fluctuation of inclusion levels. [0003] With the development of continuous casting technology, the continuous casting tundish, as the last reactor in the steel smelting process, plays the role of storing and distributing molten steel and removing molten steel inclus...

Claims

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Application Information

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IPC IPC(8): B22D41/50B22D11/10
CPCB22D11/10B22D41/507
Inventor 金焱刘子钰杨符林鹏程常桂王炜向宇扬井润东曹扬
Owner WUHAN UNIV OF SCI & TECH
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