Gas blowing type flow control turbulence inhibitor for continuous casting tundishes

A continuous casting tundish and suppressor technology, which is applied in the direction of casting molten material containers, casting equipment, manufacturing tools, etc., can solve the problems of easy erosion and erosion of stoppers, secondary pollution of molten steel, etc., and achieve easy popularization and application, The effect of improving quality and increasing residence time

Active Publication Date: 2019-10-25
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above two types of turbulence suppressors can generate swirling flow through the built-in block, but because they are installed in the injection flow impact area, the block is easy to be washed and eroded, and there is a risk of secondary pollution of molten steel

Method used

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  • Gas blowing type flow control turbulence inhibitor for continuous casting tundishes
  • Gas blowing type flow control turbulence inhibitor for continuous casting tundishes
  • Gas blowing type flow control turbulence inhibitor for continuous casting tundishes

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] In this example, see figure 1 , figure 2 and Figure 7 , a continuous casting tundish air blowing type flow control turbulence suppressor, which is installed in a single-flow tundish, as a single-flow tundish air blowing type turbulence suppressor, the suppressor forms a hollow inverted quadrangular truss structure with an open top, The turbulence suppressor chamber forms an upward expansion form. The three side walls of the turbulence suppressor are perpendicular to the bottom of the tundish, and one side wall is inclined to the outside of the turbulence suppressor chamber. Each of the four side walls is equipped with blowing ports. The turbulence is blown in through the air pipe, and blown to each outlet respectively by the air pipe. When the air outlet is directly facing the center of the chamber of the turbulence suppressor, a cushion in the form of an air curtain will be formed at the bottom of the chamber; The air pipes in the three side walls of the device are...

Embodiment 2

[0037] This embodiment is basically the same as Embodiment 1, especially in that:

[0038] In this example, see image 3 , Figure 4 and Figure 7 , a continuous casting tundish air blowing type flow control turbulence suppressor, which is installed in the double-flow tundish, as a double-flow tundish air blowing type turbulence suppressor, the suppressor forms a cylindrical basin structure with an open top, and the turbulence suppressor cylinder The side wall is perpendicular to the bottom surface of the tundish, and the side wall is symmetrically opened with square steel liquid flow grooves with rounded corners to form a flow guide device. The upper opening has convex ribs with closing structure to form a flow-blocking structure. The gas delivery pipe is buried in the refractory material layer on the side wall of the turbulence suppressor chamber. Several air blowing ports are evenly distributed on the annular side wall. The air pipes are blown in separately, and the air ...

Embodiment 3

[0043] This embodiment is basically the same as the previous embodiment, and the special features are:

[0044] In this example, see Figure 5 , Figure 6 heat exchange Figure 7 , when the tundish is a multi-flow tundish, the suppressor forms a cylindrical basin structure with an open top, the cylindrical side wall of the turbulence suppressor is perpendicular to the bottom surface of the tundish, and there are at least two square steel liquid flows with rounded corners on the side wall The flow center line of the two square steel liquid flow grooves forms a diversion and diversion device with an acute angle relationship. The bottom of the square steel liquid flow groove is inclined to the outside of the turbulence suppressor chamber to form a slope. There are convex ribs with a closing structure at the mouth to form a flow blocking structure. The gas delivery pipe is buried in the refractory material layer on the side wall of the turbulence suppressor chamber. Several air ...

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Abstract

The invention discloses a gas blowing type flow control turbulence inhibitor for continuous casting tundishes. Aiming at a single-strand tundish, a two-strand tundish and a multi-strand tundish, a structure that a gas blowing system is embedded in the side wall of a high pressure region of the turbulence inhibitor is employed; the gas blowing system is embedded in a refractory layer of the side wall of the high pressure region of the turbulence inhibitor; the gas blowing system consists of gas inlets, gas delivery pipes, a gas blowing pipe and gas blowing ports; a protective gas is blown out from the gas blowing ports of the gas delivery pipes; the blown gas forms a gas cushion in the high pressure region to relieve the pouring impact on molten steel; by changing the rotating direction ofthe gas blowing pipe, a powerful gas cyclone is generated in the high pressure region to drive the molten steel to rotate, so that the turbulence energy of the molten steel is obviously reduced, the collision probability of non-metallic inclusions is increased, and the non-metallic inclusions are promoted to float up for removal; a chute is inclined and an inclined gas blowing system is installedin the lower side wall of the chute to guide the flowing direction of the molten steel to make the molten steel keep away from streams of a pouring impact zone, so that the residence time of the molten steel is prolonged, short circuit flows are reduced, and the flow filed of the molten steel in the tundishes is improved. The turbulence inhibitor is simple in structure, convenient to install and safe and reliable.

Description

technical field [0001] The invention relates to a continuous casting tundish device, in particular to a continuous casting tundish internal flow control device, which is applied in the technical field of special equipment for iron and steel metallurgical continuous casting process. Background technique [0002] With the development of continuous casting technology, people's quality requirements for continuous casting slabs are also continuously improving, and the impact of the existence of non-metallic inclusions in continuous casting slabs on continuous casting slabs and their subsequent use has been paid more and more attention. . Therefore, it has become an important task to reduce the inclusions in continuous casting slabs and improve the quality of continuous casting slabs. [0003] The tundish is a key link to control the cleanliness of molten steel in the continuous casting process. In order to better exert its metallurgical function of removing inclusions, it is ver...

Claims

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Application Information

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IPC IPC(8): B22D41/00
CPCB22D41/00
Inventor 王波阮琰炜张捷宇沈诗怡姚煜
Owner SHANGHAI UNIV
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