CN114682753A - Control process for improving three-flow tundish flow field - Google Patents
Control process for improving three-flow tundish flow field Download PDFInfo
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- CN114682753A CN114682753A CN202210306116.2A CN202210306116A CN114682753A CN 114682753 A CN114682753 A CN 114682753A CN 202210306116 A CN202210306116 A CN 202210306116A CN 114682753 A CN114682753 A CN 114682753A
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- slag
- flow
- wall
- tundish
- molten steel
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- 238000000034 method Methods 0.000 title claims abstract description 13
- 239000002893 slag Substances 0.000 claims abstract description 28
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 25
- 239000010959 steel Substances 0.000 claims abstract description 25
- 238000005266 casting Methods 0.000 claims abstract description 22
- 230000000903 blocking effect Effects 0.000 claims abstract description 17
- 239000003381 stabilizer Substances 0.000 claims abstract description 17
- 230000008093 supporting effect Effects 0.000 claims abstract description 8
- 230000014759 maintenance of location Effects 0.000 claims abstract description 7
- 230000002035 prolonged effect Effects 0.000 claims abstract description 6
- 239000011449 brick Substances 0.000 claims abstract description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 4
- 239000012535 impurity Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- 238000009991 scouring Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009851 ferrous metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
Images
Classifications
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- 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
- B22D11/16—Controlling or regulating processes or operations
- B22D11/18—Controlling or regulating processes or operations for pouring
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D43/00—Mechanical cleaning, e.g. skimming of molten metals
- B22D43/001—Retaining slag during pouring molten metal
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention relates to a control process for improving a three-flow tundish flow field, which comprises the following steps: 1) the bottom of the current stabilizer is in a sawtooth shape, and an arc-shaped bulge is additionally arranged on the vertical side wall of the current stabilizer; 2) designing the slag blocking wall into a special-shaped slag blocking wall, and expanding two sides of the slag blocking wall to the direction far away from the impact area; the guide hole of the slag blocking wall is a square hole and is arranged at the bottom of the slag blocking wall; 3) a dam with the height of 260mm is additionally arranged on the side close to the middle casting flow and matched with a flow guide hole at the bottom of a slag wall, so that the retention time of molten steel in a tundish is prolonged; 4) 4 supporting bricks are arranged on the upper portion of the slag-stopping wall, and meanwhile, the bottom dam also has a supporting effect on the slag-stopping wall, so that the slag-stopping wall is firmer and is not easy to collapse. The invention weakens the strong vortex caused by the impact of the ladle casting flow, can reduce the slag entrapment probability of the molten steel, promotes the floating of the inclusion of the molten steel, simultaneously avoids the direct flowing of the molten steel into the submerged nozzle of the intermediate casting flow, and prolongs the retention time of the molten steel in the tundish.
Description
Technical Field
The invention relates to the technical field of ferrous metallurgy, in particular to a control process for improving a three-flow tundish flow field.
Background
The intermediate flow of the three-flow tundish is too close to the impact point of molten steel of the ladle, so that the residence time of the molten steel of the intermediate cast flow in the tundish is too short, and the method has the following problems:
1) the temperature of the molten steel of the middle casting flow is 3-5 ℃ higher than that of the molten steel of the casting flows at two sides, the control of the temperature of the tundish is not facilitated, and the low-power mass of the casting blank is lower than that of the casting flows at two sides due to the high superheat degree of the molten steel of the middle casting flow;
2) the molten steel of the intermediate cast flow cannot float sufficiently due to the short residence time in the tundish, so that the control of the inclusions in the steel of the intermediate cast flow is obviously more serious than that of the cast flows at two sides.
In view of the above problems, the current measures adopted by domestic steel mills are to reduce the casting machine pulling speed of the intermediate casting flow, and have certain improvement effect on the low-power quality of the casting blank and the control of impurities, but still cannot fundamentally solve the quality problem of the intermediate casting flow.
Disclosure of Invention
The invention aims to provide a control process for improving a three-flow tundish flow field.
The technical scheme adopted by the invention for solving the technical problems is as follows: a control process for improving a three-flow tundish flow field is constructed, and comprises the following steps:
1) the bottom of the current stabilizer is designed to be in a sawtooth shape, and an arc-shaped bulge is additionally arranged on the vertical side wall of the current stabilizer; the flow stabilizer is directly opposite to the flow guide holes of the slag blocking wall and is provided with two flow guide holes;
2) under the condition of ensuring that the slag-stopping wall does not interfere with the stopper rod and the water gap, the slag-stopping wall is designed into a special-shaped slag-stopping wall, and two sides of the slag-stopping wall are expanded towards the direction far away from the impact area; the guide hole of the slag blocking wall is a square hole and is arranged at the bottom of the slag blocking wall;
3) a dam with the height of 260mm is additionally arranged on the side close to the middle casting flow and matched with a flow guide hole at the bottom of a slag wall, so that the retention time of molten steel in a tundish is prolonged;
4) 4 supporting bricks are arranged on the upper portion of the slag-stopping wall, and meanwhile, the bottom dam also has a supporting effect on the slag-stopping wall, so that the slag-stopping wall is firmer and is not easy to collapse.
According to the scheme, the saw tooth at the bottom of the current stabilizer is exposed to about 40mm in height, and the chamfer angle is about 45 degrees.
According to the scheme, the diversion holes and the slag blocking wall form 60-degree chamfers.
According to the scheme, the height of the high dam in the step 3) is 260 mm.
The implementation of the control process for improving the three-flow tundish flow field has the following beneficial effects:
1) the flow stabilizer is optimized to weaken strong eddy caused by ladle casting flow impact, reduce the slag entrapment probability of molten steel and promote the floating of molten steel inclusions. Meanwhile, the flow guide holes of the flow stabilizer are optimized, so that the scouring of molten steel on the slag-stopping wall is weakened, and the risk of collapse of the slag-stopping wall can be reduced.
2) The shape structure of the slag retaining wall of the tundish is optimized, the volume of an impact area is enlarged, and meanwhile, the molten steel is prevented from directly flowing into an intermediate casting flow submerged nozzle after passing through the flow guide holes of the slag retaining wall, so that the retention time of the molten steel in the tundish is prolonged.
3) The dam is arranged in the tundish by matching with the optimized slag blocking wall, particularly the dams are arranged at two sides of the middle casting flow, so that the flow track of the molten steel in the tundish can be obviously improved, the retention time of the molten steel in the tundish is prolonged, and the floating removal of impurities is promoted.
Drawings
The invention will be further described with reference to the following drawings and examples, in which:
FIG. 1 is a schematic view of a conventional three-flow tundish liner;
FIG. 2 is a schematic diagram of a conventional tundish current stabilizer;
FIG. 3 is a schematic view of a conventional three-flow tundish slag wall;
FIG. 4 is a schematic diagram of an optimized in-flow liner;
FIG. 5 is a schematic diagram of a novel tundish current stabilizer;
fig. 6 is a schematic diagram of a novel three-flow tundish slag wall.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 4-6, the control process for improving the three-flow tundish flow field of the present invention comprises the following steps:
1) the bottom of the current stabilizer is designed into a sawtooth shape, the exposed height of the sawtooth is about 40mm, the chamfer angle is about 45 degrees, and an arc-shaped bulge is additionally arranged on the vertical side wall of the current stabilizer, so that strong vortex caused by ladle casting flow impact can be obviously weakened, and floating of inclusions is facilitated.
The original current stabilizer is adjusted to be two flow guide holes directly facing to a single flow guide hole of the slag blocking wall, and the flow guide holes and the slag blocking wall form 60-degree chamfers, so that the scouring of molten steel on the slag blocking wall can be weakened, and the risk of the slag blocking wall collapsing can be reduced.
2) Under the condition of ensuring that the slag-stopping wall does not interfere with a stopper rod and a water gap, the original U-shaped slag-stopping wall is designed into a special-shaped slag-stopping wall (see the attached drawing specifically), two sides of the slag-stopping wall are expanded towards the direction far away from an impact area (meanwhile, the width of the slag-stopping wall is increased), the volume of the impact area can be greatly increased, and floating of impurities is improved.
The guide holes of the slag-stopping wall are adjusted from round holes to square holes, and the guide holes are arranged at the bottom of the slag-stopping wall and have the size of about 200 multiplied by 200mm2(the thickness of the working layer refractory material is 100mm, and the size of the actual diversion hole is 200 multiplied by 100mm2The size can be adjusted according to the section of the casting machine and the pulling speed).
3) High dams (the thickness of a refractory material of a working layer is 100mm, and the actual effective dam height is about 160mm) with the height of 1 mm to 260mm are respectively added at the 2 side of the intermediate casting flow and the sides of the 1 flow and the 3 flow close to the intermediate casting flow, and the retention time of molten steel in a tundish can be greatly prolonged and the quality of a casting blank is improved by matching with a flow guide hole at the bottom of a slag wall.
4) The number of the supporting bricks at the upper part of the slag-stopping wall is increased from 2 to 4, and simultaneously, the bottom dam also has a supporting effect on the slag-stopping wall, so that the slag-stopping wall is firmer and is not easy to collapse.
5) Fig. 4 to 6 are design optimization performed by combining a specific three-flow tundish structure of a certain steel mill, and the sizes of the components of other three-flow tundish structures can be adjusted by reference.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (4)
1. A control process for improving a three-flow tundish flow field is characterized by comprising the following steps:
1) the bottom of the current stabilizer is designed to be in a sawtooth shape, and an arc-shaped bulge is additionally arranged on the vertical side wall of the current stabilizer; the flow stabilizer is directly opposite to the flow guide holes of the slag blocking wall and is provided with two flow guide holes;
2) under the condition of ensuring that the slag-stopping wall does not interfere with the stopper rod and the water gap, the slag-stopping wall is designed into a special-shaped slag-stopping wall, and two sides of the slag-stopping wall are expanded towards the direction far away from the impact area; the guide hole of the slag blocking wall is a square hole and is arranged at the bottom of the slag blocking wall;
3) a dam with the height of 260mm is additionally arranged on the side close to the middle casting flow and matched with a flow guide hole at the bottom of a slag wall, so that the retention time of molten steel in a tundish is prolonged;
4) 4 supporting bricks are arranged on the upper portion of the slag-stopping wall, and meanwhile, the bottom dam also has a supporting effect on the slag-stopping wall, so that the slag-stopping wall is firmer and is not easy to collapse.
2. The control process for improving the flow-in-three-flow field according to claim 1, wherein the exposed height of the saw teeth at the bottom of the flow stabilizer is about 40mm, and the chamfer angle is about 45 degrees.
3. The control process for improving the flow field in three-flow packets according to claim 1, wherein the diversion holes and the slag wall are chamfered at 60 degrees.
4. The control process for improving the flow-in-three-flow field according to claim 1, wherein the height of the high dam in step 3) is 260 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210306116.2A CN114682753A (en) | 2022-03-25 | 2022-03-25 | Control process for improving three-flow tundish flow field |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210306116.2A CN114682753A (en) | 2022-03-25 | 2022-03-25 | Control process for improving three-flow tundish flow field |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114682753A true CN114682753A (en) | 2022-07-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210306116.2A Pending CN114682753A (en) | 2022-03-25 | 2022-03-25 | Control process for improving three-flow tundish flow field |
Country Status (1)
| Country | Link |
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| CN (1) | CN114682753A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115283657A (en) * | 2022-08-19 | 2022-11-04 | 山东钢铁股份有限公司 | Tundish device for unbalanced casting and using method |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2663054Y (en) * | 2003-11-13 | 2004-12-15 | 王元斌 | Flow-stabilizing device for tundish |
| CN202539543U (en) * | 2012-03-13 | 2012-11-21 | 濮阳濮耐高温材料（集团）股份有限公司 | Composite continuous casting tundish current stabilizer |
| CN203610667U (en) * | 2013-11-15 | 2014-05-28 | 河南省宏达炉业有限公司 | Flow-stabilizing and residue-blocking device for continuous casting molten steel tundish |
| CN206622605U (en) * | 2017-04-10 | 2017-11-10 | 中冶连铸技术工程有限责任公司 | A kind of three machines three stream slab CC tundish |
| CN110153402A (en) * | 2019-03-29 | 2019-08-23 | 山西太钢不锈钢股份有限公司 | Improve method and three stream T-type tundish that three stream T-type tundish respectively flow consistency |
| CN209754003U (en) * | 2018-12-28 | 2019-12-10 | 南京钢铁股份有限公司 | Tundish for continuous casting |
| CN210139053U (en) * | 2019-04-11 | 2020-03-13 | 邯郸钢铁集团有限责任公司 | Single tundish structure of eight-strand continuous casting |
| CN111136252A (en) * | 2019-12-30 | 2020-05-12 | 山东钢铁集团日照有限公司 | Continuous casting tundish slag dam |
| CN212598843U (en) * | 2020-06-13 | 2021-02-26 | 阳春新钢铁有限责任公司 | Improved T-shaped five-flow tundish optimized smooth slag wall |
| CN214133954U (en) * | 2020-09-10 | 2021-09-07 | 浙江自立高温科技股份有限公司 | Continuous casting tundish current stabilizer |
| CN215919072U (en) * | 2021-08-02 | 2022-03-01 | 南京钢铁股份有限公司 | Tundish for bloom |
-
2022
- 2022-03-25 CN CN202210306116.2A patent/CN114682753A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2663054Y (en) * | 2003-11-13 | 2004-12-15 | 王元斌 | Flow-stabilizing device for tundish |
| CN202539543U (en) * | 2012-03-13 | 2012-11-21 | 濮阳濮耐高温材料（集团）股份有限公司 | Composite continuous casting tundish current stabilizer |
| CN203610667U (en) * | 2013-11-15 | 2014-05-28 | 河南省宏达炉业有限公司 | Flow-stabilizing and residue-blocking device for continuous casting molten steel tundish |
| CN206622605U (en) * | 2017-04-10 | 2017-11-10 | 中冶连铸技术工程有限责任公司 | A kind of three machines three stream slab CC tundish |
| CN209754003U (en) * | 2018-12-28 | 2019-12-10 | 南京钢铁股份有限公司 | Tundish for continuous casting |
| CN110153402A (en) * | 2019-03-29 | 2019-08-23 | 山西太钢不锈钢股份有限公司 | Improve method and three stream T-type tundish that three stream T-type tundish respectively flow consistency |
| CN210139053U (en) * | 2019-04-11 | 2020-03-13 | 邯郸钢铁集团有限责任公司 | Single tundish structure of eight-strand continuous casting |
| CN111136252A (en) * | 2019-12-30 | 2020-05-12 | 山东钢铁集团日照有限公司 | Continuous casting tundish slag dam |
| CN212598843U (en) * | 2020-06-13 | 2021-02-26 | 阳春新钢铁有限责任公司 | Improved T-shaped five-flow tundish optimized smooth slag wall |
| CN214133954U (en) * | 2020-09-10 | 2021-09-07 | 浙江自立高温科技股份有限公司 | Continuous casting tundish current stabilizer |
| CN215919072U (en) * | 2021-08-02 | 2022-03-01 | 南京钢铁股份有限公司 | Tundish for bloom |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115283657A (en) * | 2022-08-19 | 2022-11-04 | 山东钢铁股份有限公司 | Tundish device for unbalanced casting and using method |
| CN115283657B (en) * | 2022-08-19 | 2023-12-19 | 山东钢铁股份有限公司 | Tundish device for unbalanced casting and application method |
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