CN213671735U

CN213671735U - Continuous casting bloom combined stirring flow control device

Info

Publication number: CN213671735U
Application number: CN202021927381.5U
Authority: CN
Inventors: 李海洋; 张家泉; 周蕾; 王璞; 王莹; 张壮; 陈希青; 祁猛
Original assignee: Nanjing Iron and Steel Co Ltd
Current assignee: Nanjing Iron and Steel Co Ltd
Priority date: 2020-09-07
Filing date: 2020-09-07
Publication date: 2021-07-13
Anticipated expiration: 2030-09-07

Abstract

The utility model discloses a continuous casting bloom combination stirring accuse flows device, the device include M-EMS crystallizer electromagnetic stirrer, the two cold section electromagnetic stirrers of S-EMS, F-EMS solidify end electromagnetic stirrer, mould, draw and rectify roller and 170 rollers, the mould inlet is provided with the shunt, M-EMS crystallizer electromagnetic stirrer sets up in the mould outside, the two cold section electromagnetic stirrers of S-EMS, F-EMS solidify end electromagnetic stirrer, 170 rollers set up in the bloom outside. The device can avoid the phenomena of negative segregation on the surface layer of the casting blank and positive segregation in a CET area, so that uneven grains in a solidification end area are fully mixed, the center quality is improved, and a homogeneous continuous casting bloom is obtained.

Description

Continuous casting bloom combined stirring flow control device

Technical Field

The utility model relates to a device is flowed in combination stirring accuse, more specifically relates to a device is flowed in continuous casting bloom combination stirring accuse.

Background

In the continuous casting process of the bloom, the pouring is generally carried out through a common straight-through water gap, but the jet impact depth is too deep, so that the floating removal of large-scale inclusions is not facilitated, and meanwhile, the liquid level is too calm, so that the melting of protective slag is not facilitated; the impact effect of high-temperature molten steel and a crystallizer is weak, overheating dissipation is not facilitated, columnar crystals are over developed, and the quality of a casting blank is difficult to guarantee finally; when the casting is carried out through a common radial side hole water gap, the side hole jet flow has high impact strength on the wall surface of the crystallizer, the phenomenon of remelting or stagnation growth of an initial solidified billet shell is caused, the subcutaneous negative segregation of the gear steel cast billet is serious, and the homogenization production of a bloom is not facilitated; meanwhile, in the solidification process of the bloom, because the solidification process is from outside to inside, the quality is uneven, the casting blank has negative segregation below the surface, positive segregation in a CET transformation area and segregation in a central loose area, and the production of homogeneous cast steel is not facilitated.

Disclosure of Invention

Utility model purpose: the utility model aims at providing a continuous casting bloom combination stirring accuse stream device that can improve the inside segregation phenomenon of bloom continuous casting in-process, prepare homogeneity bloom.

The technical scheme is as follows: the invention relates to a continuous casting bloom combined stirring flow control device, which comprises an M-EMS crystallizer electromagnetic stirrer, an S-EMS secondary cooling section electromagnetic stirrer, an F-EMS solidification end electromagnetic stirrer, a mold, a pulling and straightening roller and 170 rollers, wherein a liquid inlet of the mold is provided with a flow divider, the M-EMS crystallizer electromagnetic stirrer is arranged outside the mold, the pulling and straightening roller is arranged at a sample outlet of the mold, and the S-EMS secondary cooling section electromagnetic stirrer, the F-EMS solidification end electromagnetic stirrer and the 170 rollers are sequentially arranged outside a bloom.

The electromagnetic stirrer of the S-EMS second cooling section is arranged in a CET transition region area in the bloom, the flow divider is a four-arc-shaped flow divider, the stirring direction of the electromagnetic stirrer of the M-EMS crystallizer is opposite to the direction of liquid flowing in through the flow divider, and the F-EMS is provided with a central loose area for continuous casting of the gear steel bloom; wherein, still include the tundish, the tundish liquid outlet is connected with the shunt.

Has the advantages that: compared with the prior art, the utility model, its advantage is: 1. negative segregation on the surface layer of the casting blank can be avoided; 2. the concentrated solute in the CET area can be fully diffused to the central molten steel, so that the positive segregation phenomenon in the area is improved; 3. the method can fully and uniformly mix uneven grains in the solidification tail area, thereby improving the segregation fluctuation in the casting blank, strengthening molten steel feeding in a mushy zone, improving the center quality, comprehensively improving the internal quality of the continuous casting bloom and obtaining the homogeneous continuous casting bloom.

Drawings

FIG. 1 is a view of the structure of the device of the present invention;

FIG. 2 is a schematic view of a diverter region;

FIG. 3 is a schematic cross-sectional view of a bloom in the S-EMS second cold stage electromagnetic stirrer region;

FIG. 4 is a schematic cross-sectional view of a region of a bloom of an electromagnetic stirrer at the end of the F-EMS freezing.

Detailed Description

As shown in figure 1, the device used in the continuous casting bloom combined stirring current control method comprises an M-EMS crystallizer electromagnetic stirrer 1, an S-EMS second cold section electromagnetic stirrer 2, an F-EMS solidification end electromagnetic stirrer 3, a die 15, pulling and straightening rollers 5 and 170 rollers 4, wherein the upper end of a liquid inlet of the die 15 is connected with a tundish 6, the M-EMS crystallizer electromagnetic stirrer 1 is arranged outside the die 15, the pulling and straightening rollers 5 are arranged at a sample outlet of the die 15, the S-EMS second cold section electromagnetic stirrer 2 is arranged in a CET transition area in a bloom, the F-EMS solidification end electromagnetic stirrer 3 is arranged in a central loose area of the continuous casting of the gear steel bloom, the 170 rollers 4 are arranged at the tail end of the bloom, as shown in figure 2, a liquid inlet of the die 15 is provided with a flow divider 7, and the flow divider 7 is a four-arc-shaped flow divider.

When the device works, the electromagnetic stirrer 1 of the M-EMS crystallizer is started, molten steel is injected into the die 15 through the flow divider 7, as shown in figure 2, the jet flow of the side hole of the four-arc-shaped flow divider has clockwise direction, the electromagnetic stirrer 1 of the M-EMS crystallizer acts on the molten steel in the die 15, the flowing direction of the molten steel is controlled to be anticlockwise, the molten steel uniformly flushes the surface of the die 15, the molten steel forms a billet shell in the die 15 and flows out through a sample outlet of the die 15, and the molten steel is conveyed downwards by the straightening and pulling roller 5; starting the S-EMS second cooling segment electromagnetic stirrer 2 to cool the S-EMS second cooling segment electromagnetic stirrer 2, wherein the S-EMS second cooling segment electromagnetic stirrer 2 acts on fluid at the end part of the columnar crystal 9 in the bloom, so that the enriched solute 10 washes the columnar crystal to diffuse towards the center of the casting blank, the columnar crystal 14 grows uniformly, and the bloom is continuously conveyed downwards; and starting the F-EMS solidification end electromagnetic stirrer 3, enabling the F-EMS solidification end electromagnetic stirrer 3 to act on a central loose area of the bloom continuous casting, strengthening the molten steel flow of a tail end mushy zone, enabling free crystal grains 13 to be uniformly solidified for feeding, and transporting through 170 rollers 4 to finally obtain the bloom.

Claims

1. The utility model provides a continuous casting bloom combination stirring accuse flows device which characterized in that, includes M-EMS crystallizer electromagnetic agitator (1), the two cold section electromagnetic agitators of S-EMS (2), F-EMS solidification end electromagnetic agitator (3), mould (15), draws and rectify roller (5) and 170 roller (4), mould (15) inlet is provided with shunt (7), M-EMS crystallizer electromagnetic agitator (1) sets up in mould (15) outside, draw and rectify roller (5) and set up in mould (15) appearance mouth, the two cold section electromagnetic agitators of S-EMS (2), F-EMS solidification end electromagnetic agitator (3), 170 roller (4) set gradually in the bloom outside.

2. The combined stirring and flow control device for continuous casting blooms according to claim 1, wherein the S-EMS second cold stage electromagnetic stirrer (2) is arranged in the CET transition region inside the bloom.

3. The combined stirring and flow control device for continuous casting blooms according to claim 1, characterized in that the diverter (7) is a quarter-arc diverter.

4. The combined stirring and flow control device for continuous casting blooms according to claim 3, characterized in that the M-EMS crystallizer electromagnetic stirrer (1) stirs in the opposite direction to the liquid flowing in through the diverter (7).

5. The combined stirring and flow control device for continuous casting blooms according to claim 1, characterized in that the F-EMS freezing end electromagnetic stirrer (3) is installed in the central loose area of the continuous casting of gear steel blooms.

6. The continuous casting bloom combined stirring flow control device according to claim 1, further comprising a tundish (6), wherein a liquid outlet of the tundish (6) is connected with the flow divider (7).