CN112122568A - Continuous casting bloom combined stirring flow control method and flow control device - Google Patents
Continuous casting bloom combined stirring flow control method and flow control device Download PDFInfo
- Publication number
- CN112122568A CN112122568A CN202010927134.3A CN202010927134A CN112122568A CN 112122568 A CN112122568 A CN 112122568A CN 202010927134 A CN202010927134 A CN 202010927134A CN 112122568 A CN112122568 A CN 112122568A
- Authority
- CN
- China
- Prior art keywords
- ems
- electromagnetic stirrer
- bloom
- die
- continuous casting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000009749 continuous casting Methods 0.000 title claims abstract description 23
- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000003756 stirring Methods 0.000 title claims abstract description 15
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 24
- 239000010959 steel Substances 0.000 claims abstract description 24
- 238000007711 solidification Methods 0.000 claims abstract description 19
- 230000008023 solidification Effects 0.000 claims abstract description 19
- 238000001816 cooling Methods 0.000 claims abstract description 13
- 239000013078 crystal Substances 0.000 claims abstract description 10
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 239000012530 fluid Substances 0.000 claims abstract description 4
- 230000007704 transition Effects 0.000 claims description 3
- 230000008014 freezing Effects 0.000 claims description 2
- 238000007710 freezing Methods 0.000 claims description 2
- 238000005204 segregation Methods 0.000 abstract description 10
- 238000005266 casting Methods 0.000 abstract description 7
- 239000002344 surface layer Substances 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000265 homogenisation Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 238000007920 subcutaneous administration Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/11—Treating the molten metal
- B22D11/114—Treating the molten metal by using agitating or vibrating means
- B22D11/115—Treating the molten metal by using agitating or vibrating means by using magnetic fields
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/10—Supplying or treating molten metal
- B22D11/103—Distributing the molten metal, e.g. using runners, floats, distributors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D11/00—Continuous casting of metals, i.e. casting in indefinite lengths
- B22D11/12—Accessories for subsequent treating or working cast stock in situ
- B22D11/122—Accessories for subsequent treating or working cast stock in situ using magnetic fields
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a continuous casting bloom combined stirring flow control method and a flow control device, wherein the method comprises the following steps: (1) starting an electromagnetic stirrer of the M-EMS crystallizer, and injecting molten steel into a mold to form a blank shell; (2) starting an S-EMS secondary cooling section electromagnetic stirrer to act on end fluid of the columnar crystal in the bloom; (3) starting an F-EMS solidification end electromagnetic stirrer to act on a central loose area of bloom continuous casting; the device comprises an M-EMS crystallizer electromagnetic stirrer, an S-EMS secondary cooling section electromagnetic stirrer, an F-EMS solidification end electromagnetic stirrer, a die, a straightening roller and 170 rollers, wherein a flow divider is arranged on a liquid inlet of the die, the M-EMS crystallizer electromagnetic stirrer is arranged on the outer side of the die, and the S-EMS secondary cooling section electromagnetic stirrer, the F-EMS solidification end electromagnetic stirrer and the 170 rollers are arranged on the outer side of a bloom. The method 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 the homogeneous continuous casting bloom is obtained.
Description
Technical Field
The invention relates to a combined stirring flow control method and a flow control device, in particular to a combined stirring flow control method and a flow control device for continuous casting blooms.
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
The purpose of the invention is as follows: the invention aims to provide a continuous casting bloom combined stirring flow control method which can improve the internal segregation phenomenon in the bloom continuous casting process and prepare homogeneous blooms; it is another object of the invention to provide an apparatus for use in the method.
The technical scheme is as follows: the invention relates to a continuous casting bloom combined stirring flow control method, which comprises the following steps:
(1) starting the electromagnetic stirrer of the M-EMS crystallizer, injecting the molten steel into the die through the flow divider, enabling the electromagnetic stirrer of the M-EMS crystallizer to act on the molten steel in the die, forming a billet shell in the die, enabling the molten steel to flow out through a sample outlet of the die, and utilizing a straightening and withdrawal roller to convey the molten steel downwards;
(2) starting the S-EMS second cooling section electromagnetic stirrer to enable the S-EMS second cooling section electromagnetic stirrer to act on the end fluid of the columnar crystal in the bloom, and continuously transmitting the bloom downwards;
(3) and starting the F-EMS solidification end electromagnetic stirrer to enable the F-EMS solidification end electromagnetic stirrer to act on a central loose area of the bloom continuous casting to enable free crystal grains to be uniformly solidified, and finally obtaining the bloom.
Wherein, the flow divider in the step 1 is a four-arc-shaped flow divider, and the stirring direction of the electromagnetic stirrer of the M-EMS crystallizer is opposite to the effluent direction of the four-arc-shaped flow divider.
The device used by the continuous casting bloom combined stirring flow control method comprises an M-EMS crystallizer electromagnetic stirrer, an S-EMS second cooling section electromagnetic stirrer, an F-EMS solidification end electromagnetic stirrer, a mold, a pulling and straightening roller and a 170 roller, wherein a liquid inlet of the mold is provided with a flow divider, the M-EMS crystallizer electromagnetic stirrer is arranged on the outer side of the mold, the pulling and straightening roller is arranged at a sample outlet of the mold, and the S-EMS second cooling section electromagnetic stirrer, the F-EMS solidification end electromagnetic stirrer and the 170 roller are sequentially arranged on the outer side of 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 invention has the following remarkable advantages: 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 block diagram of the apparatus 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 (8)
1. A continuous casting bloom combined stirring flow control method is characterized by comprising the following steps:
(1) starting the electromagnetic stirrer (1) of the M-EMS crystallizer, injecting molten steel into the die (15) through the flow divider (7), enabling the electromagnetic stirrer (1) of the M-EMS crystallizer to act on the molten steel in the die (15), forming a billet shell in the die (15) by the molten steel, enabling the molten steel to flow out through a sample outlet of the die (15), and utilizing a straightening and withdrawal roller (5) to convey the molten steel downwards;
(2) starting the S-EMS secondary cooling section electromagnetic stirrer (2), so that the S-EMS secondary cooling section electromagnetic stirrer (2) acts on fluid at the end part of the columnar crystal (9) in the bloom, and the bloom is continuously conveyed downwards;
(3) and starting the F-EMS solidification end electromagnetic stirrer (3), so that the F-EMS solidification end electromagnetic stirrer (3) acts on a central loose area of the bloom continuous casting, and free crystal grains (13) are uniformly solidified to finally obtain the bloom.
2. The combined stirring and flow control method for the continuous casting bloom as claimed in claim 1, wherein the diverter (7) in step 1 is a quarter arc diverter, and the stirring direction of the electromagnetic stirrer (1) of the M-EMS crystallizer is opposite to the effluent direction of the quarter arc diverter.
3. The device for the combined stirring and flow control method of the continuous casting bloom as claimed in claim 1, which 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 a flow divider (7) is arranged at a liquid inlet of the die (15), the M-EMS crystallizer electromagnetic stirrer (1) is arranged at the outer side of the die (15), the pulling and straightening rollers (5) are arranged at a sample outlet of the die (15), and the S-EMS second cold section electromagnetic stirrer (2), the F-EMS solidification end electromagnetic stirrer (3) and the 170 rollers (4) are sequentially arranged at the outer side of the bloom.
4. The apparatus according to claim 3, wherein the S-EMS second cold stage electromagnetic stirrer (2) is arranged in the region of the CET transition region inside the bloom.
5. A device according to claim 3, characterized in that the diverter (7) is a quarter arc diverter.
6. The apparatus according to claim 5, characterized in that the M-EMS crystallizer electromagnetic stirrer (1) is stirred in the opposite direction to the liquid flowing in through the flow divider (7).
7. The apparatus according to claim 3, characterized in that the F-EMS freezing end electromagnetic stirrer (3) is installed in the central loose area of the cogged steel bloom continuous casting.
8. The apparatus according to claim 3, further comprising a tundish (6), wherein the outlet of the tundish (6) is connected with the flow divider (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010927134.3A CN112122568A (en) | 2020-09-07 | 2020-09-07 | Continuous casting bloom combined stirring flow control method and flow control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010927134.3A CN112122568A (en) | 2020-09-07 | 2020-09-07 | Continuous casting bloom combined stirring flow control method and flow control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112122568A true CN112122568A (en) | 2020-12-25 |
Family
ID=73848228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010927134.3A Pending CN112122568A (en) | 2020-09-07 | 2020-09-07 | Continuous casting bloom combined stirring flow control method and flow control device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112122568A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114029463A (en) * | 2021-11-25 | 2022-02-11 | 山东钢铁股份有限公司 | Method for solving segregation of large round billet of special steel |
| CN114762892A (en) * | 2021-01-13 | 2022-07-19 | 江苏联峰能源装备有限公司 | Mixed pouring process for high-carbon grinding ball steel casting blank with different cross sections in same pouring time |
| CN114951579A (en) * | 2021-02-24 | 2022-08-30 | 山西太钢不锈钢股份有限公司 | Method for continuously casting high-carbon martensitic stainless steel |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831521A (en) * | 2010-05-25 | 2010-09-15 | 安阳钢铁股份有限公司 | Method for producing cord steel |
| CN103184304A (en) * | 2013-04-19 | 2013-07-03 | 江苏沙钢集团淮钢特钢股份有限公司 | Technology for producing 38CrMoAl steel by converter-LF (low frequency)-RH (rockwell hardness)-continuous casting |
| CN103567410A (en) * | 2013-11-04 | 2014-02-12 | 山东西王特钢有限公司 | Process for controlling center porosity of large and round continuous casting billet |
| CN206689419U (en) * | 2017-05-25 | 2017-12-01 | 佛山科学技术学院 | A kind of bloom continuous casting eddy flow downspout couples pouring device with crystallizer stirring |
| CN108672666A (en) * | 2018-05-24 | 2018-10-19 | 江苏省沙钢钢铁研究院有限公司 | Continuous Casting Method for Improving Center Segregation of Round Billet Spring Steel 60Si2CrVAT |
| CN213671735U (en) * | 2020-09-07 | 2021-07-13 | 南京钢铁股份有限公司 | Continuous casting bloom combined stirring flow control device |
-
2020
- 2020-09-07 CN CN202010927134.3A patent/CN112122568A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101831521A (en) * | 2010-05-25 | 2010-09-15 | 安阳钢铁股份有限公司 | Method for producing cord steel |
| CN103184304A (en) * | 2013-04-19 | 2013-07-03 | 江苏沙钢集团淮钢特钢股份有限公司 | Technology for producing 38CrMoAl steel by converter-LF (low frequency)-RH (rockwell hardness)-continuous casting |
| CN103567410A (en) * | 2013-11-04 | 2014-02-12 | 山东西王特钢有限公司 | Process for controlling center porosity of large and round continuous casting billet |
| CN206689419U (en) * | 2017-05-25 | 2017-12-01 | 佛山科学技术学院 | A kind of bloom continuous casting eddy flow downspout couples pouring device with crystallizer stirring |
| CN108672666A (en) * | 2018-05-24 | 2018-10-19 | 江苏省沙钢钢铁研究院有限公司 | Continuous Casting Method for Improving Center Segregation of Round Billet Spring Steel 60Si2CrVAT |
| CN213671735U (en) * | 2020-09-07 | 2021-07-13 | 南京钢铁股份有限公司 | Continuous casting bloom combined stirring flow control device |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114762892A (en) * | 2021-01-13 | 2022-07-19 | 江苏联峰能源装备有限公司 | Mixed pouring process for high-carbon grinding ball steel casting blank with different cross sections in same pouring time |
| CN114951579A (en) * | 2021-02-24 | 2022-08-30 | 山西太钢不锈钢股份有限公司 | Method for continuously casting high-carbon martensitic stainless steel |
| CN114951579B (en) * | 2021-02-24 | 2024-05-03 | 山西太钢不锈钢股份有限公司 | Continuous casting method of high-carbon martensitic stainless steel |
| CN114029463A (en) * | 2021-11-25 | 2022-02-11 | 山东钢铁股份有限公司 | Method for solving segregation of large round billet of special steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112122568A (en) | Continuous casting bloom combined stirring flow control method and flow control device | |
| CN102303102B (en) | Continuous casting process and continuous casting machine for extra-thick plate blank | |
| CN108817332B (en) | Method for controlling solidification quality of large-specification medium-high alloy steel vertical continuous casting billet | |
| CN101332493B (en) | Gas film quick continuous casting device and method in magnetostatic field | |
| CN105598402B (en) | A kind of steel continuous casting crystallizer feeds core-spun yarn and the dynamic control method of line feeding process | |
| CN110000355B (en) | Method for improving frame segregation of bloom continuous casting billet | |
| CN103567410A (en) | Process for controlling center porosity of large and round continuous casting billet | |
| CN109079114A (en) | A method of abrasion-resistant stee is produced using slab secondary cooling zone electromagnetic agitation | |
| CN213671735U (en) | Continuous casting bloom combined stirring flow control device | |
| CN113231611B (en) | Method for determining technological parameters of continuous casting steel strip feeding by low-superheat isothermal eutectic method | |
| CN104249149B (en) | A kind of channel-type sensing heating tundish and its casting method | |
| Miyazawa | Continuous casting of steels in Japan | |
| CN112743053B (en) | Crystallizer for solving peritectic steel continuous casting slab surface cracks and control method | |
| CN105983670B (en) | A kind of compound method for intervening improvement Inner Quality of Billet | |
| CN115106488B (en) | Drainage device for copper alloy casting | |
| JPH057100B2 (en) | ||
| CN114749616A (en) | Ingot mould for large-scale high-length-diameter ratio steel ingot and blank forming method | |
| CN202779647U (en) | Semisolid nonferrous metal continuous casting device | |
| Dock-Young et al. | Effects of casting speed on microstructure and segregation of electro-magnetically stirred aluminum alloy in continuous casting process | |
| CN108705050A (en) | The method that bloom continuous casting produces 34CrMo4 oxygen cylinder steel | |
| CN101244450A (en) | Method and apparatus for manufacturing hollow copper alloy casting ingot | |
| CN102764884B (en) | Straight-through type continuous casting immersion-type water gap | |
| RU2741876C1 (en) | Method for continuous casting of slab bills | |
| CN210188431U (en) | Progressive solidification forming device for large cast ingot or cast blank | |
| CN102806329A (en) | Continuous blank casting system capable of performing semi-solid processing on non-ferrous alloy |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |