CN114799151A - Process method capable of realizing quick centering of tundish - Google Patents
Process method capable of realizing quick centering of tundish Download PDFInfo
- Publication number
- CN114799151A CN114799151A CN202210618663.4A CN202210618663A CN114799151A CN 114799151 A CN114799151 A CN 114799151A CN 202210618663 A CN202210618663 A CN 202210618663A CN 114799151 A CN114799151 A CN 114799151A
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- China
- Prior art keywords
- tundish
- centering
- crystallizer
- process method
- laser
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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
- B22D41/00—Casting melt-holding vessels, e.g. ladles, tundishes, cups or the like
- B22D41/50—Pouring-nozzles
- B22D41/56—Means for supporting, manipulating or changing a pouring-nozzle
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D2/00—Arrangement of indicating or measuring devices, e.g. for temperature or viscosity of the fused mass
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention belongs to the technical field of tundish of continuous casting machines, and particularly relates to a process method capable of realizing quick centering of a tundish. The process method can accurately finish the tundish centering operation by one person, realizes quick automatic accurate centering, improves the automation level of a continuous casting machine, and reaches the domestic advanced level. The tundish centering time is controlled within 1 minute, the problem that the tundish temperature is reduced to below 850 ℃ due to overlong tundish waiting time after baking is avoided, the casting shrinkage is solved, the casting success rate of the tundish is ensured, and the centering of a tundish nozzle and a crystallizer is controlled within less than or equal to 5 mm.
Description
Technical Field
The invention belongs to the technical field of tundish of continuous casting machines, and particularly relates to a process method capable of realizing quick tundish centering.
Background
In the continuous casting process, when the continuous casting machine starts casting or a tundish is subjected to heat exchange, a tundish nozzle needs to be superposed with a vertical center line of a crystallizer, and the deviation is required to be less than 5mm, so that the stability of a molten steel flow field in the crystallizer in the casting process is ensured, the phenomenon of slag entrapment of molten steel, casting blank desquamation caused by the influence on the external quality of the casting blank, the phenomenon of low-power cracks of the casting blank caused by the influence on the internal quality of the casting blank, and the phenomena of component segregation and inclusion increase, which can cause the occurrence of steel leakage accidents in serious cases. If the injection flow is deflected, a water gap is not aligned, so that liquid is unstable, liquid level fluctuation is large, non-slag blocks in a crystallizer are involved in a solidified shell, non-metal inclusions in a middle package flow into a casting blank liquid cavity in the crystallizer along with molten steel, so that steel blanks flow out of the crystallizer to leak molten steel, secondly, the injection flow is deflected, the liquid level is unstable, the slag line part of the water gap is seriously eroded, and the molten steel leaking at the part can have negative effects on melting of protective slag on the liquid level of the crystallizer, floating of the inclusions and the like when the molten steel is seriously, so that quality defects appear on the surface and the inside of the casting blank; moreover, the injection flow is inclined, so that overlarge or frequent liquid level fluctuation is easy to occur, difficulty is brought to constant-pulling-speed operation, and even liquid level slag entrapment is caused.
Before the casting of the existing continuous casting machine, a tundish arranged on a tundish car needs to be baked at a baking station, the tundish is moved to a casting station after the baking is finished, the tundish enables a water gap of the tundish to be aligned with the position of a lower crystallizer through the travelling of the tundish car and a tundish transverse moving device, and the alignment method of the tundish comprises the following steps:
firstly, the method comprises the following steps: the middle package does not install the drainage sand additional, and the mouth of a river is opened and is used traditional T type centralizer.
And inserting the upper part of the T-shaped centering device into a water gap of a tundish, enabling the lower part of the T-shaped centering device to fall into the crystallizer, and centering the T-shaped centering device at the position of the crystallizer by visual inspection of staff. The following disadvantages exist:
1. during centering, an employee performs centering on the position of the crystallizer through the visual T-shaped centering device, the visual centering is not based, the centering is performed by the naked eye of the employee, centering data are unstable, only simple centering can be performed, and the centering failure is caused by the fact that the deviation of the tundish centering is larger than 5mm as a final result.
2. The worker stands in front of the crystallizer, can' T observe the horizontal centering position of the pouring basket mouth of a river, only can one person hold the T-shaped centering device, one person goes to one side of the crystallizer to observe and carry out horizontal centering, two persons cooperate and operate, the centering step of the staff has been increased, the number of the staff is increased, the efficiency is low, the centering time is more than 3 minutes, the centering time is long, the temperature of the pouring basket after baking is reduced to be less than 800 ℃ from more than 850 ℃, the pouring basket can be caused to have a low temperature due to the pouring basket after being poured, the phenomenon of contraction flow of the steel flow is generated, the pouring difficulty is increased, and the pouring failure can be caused in serious cases.
II, secondly: and (4) filling sand is added in a water port of the tundish, and the tundish is centered when the water port is blocked.
After installing the drainage sand additional, the middle package mouth of a river stops up, and package centering in the middle of will unable use traditional T type centering device will not be carried out in the middle of can' T inserting middle package mouth of a river because of traditional T type centering device, can only rely on the staff to measure the eye totally around, horizontal centering, lead to following problem:
1. the centering has no basis, the pouring flow deflects after casting, the external quality, the internal quality and the production accident of a casting blank caused by the deflection of the pouring flow are caused, the pouring flow (molten steel) is poured to the upper opening of the crystallizer in serious conditions, the crystallizer is burnt, the sealing ring of the crystallizer is damaged, the water leakage of the crystallizer is caused, the casting is stopped, and the casting failure is caused.
2. The centering time is more than 4 minutes, so that the tundish temperature is further reduced to below 750 ℃ at the lowest, the casting difficulty is increased, casting failure can be caused in severe cases, the whole production rhythm is disturbed, and the consequence is extremely severe.
Disclosure of Invention
The invention aims to solve the problems of low efficiency and low precision of tundish nozzle centering, and provides a process method capable of realizing tundish nozzle quick centering.
The technical scheme adopted by the invention for solving the technical problems is as follows: a process method capable of realizing quick centering of a tundish comprises the following steps:
1) the method is characterized in that a support is made of light materials according to the section of a poured casting blank, the support can be clamped into a crystallizer, the peripheral gap is less than or equal to 1.5mm, and a handle is made on the side facing the front of the crystallizer and is convenient to take and use;
2) manufacturing a clamping device at the center of the bracket, wherein the clamping device is used for clamping the laser emitting device and requires no deviation or deviation less than 1mm at the center position;
3) the laser emitting device is arranged on the clamping device, the signal receiver is arranged in the center of the tundish nozzle and connected with the control system, and the control system controls the tundish nozzle to be automatically centered with the crystallizer.
Furthermore, the laser emitting device is a laser pen, rays emitted by the laser pen can be emitted into a water gap of the tundish, namely, the centering is finished, and the support is taken out after the centering is finished.
Furthermore, the laser emitting device is a laser emitter, the signal receiver is a probe, the probe receives a signal of the laser emitter and feeds the signal back to the control system, and the control system controls the tundish nozzle to be automatically and accurately centered with the crystallizer.
The invention has the following beneficial effects: the process method can accurately finish the tundish centering operation by one person, realizes quick automatic accurate centering, improves the automation level of a continuous casting machine, and reaches the domestic advanced level. The tundish centering time is controlled within 1 minute, the problem that the tundish temperature is reduced to below 850 ℃ due to overlong tundish waiting time after baking is avoided, the casting shrinkage is solved, the casting success rate of the tundish is ensured, and the centering of a tundish nozzle and a crystallizer is controlled within less than or equal to 5 mm.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the scope of the present invention is not limited to these examples. All changes, modifications and equivalents that do not depart from the spirit of the invention are intended to be included within the scope thereof.
According to the centering characteristic of the tundish, firstly, a support is manufactured by using a light steel pipe or a light material according to the section of a poured casting blank, the support can be in a cross shape or a square shape, the support can be required to be clamped into a crystallizer, the peripheral gap is less than or equal to 1.5mm, a clamping device is manufactured in the center of the support and used for clamping a laser pen, and the center position is required to have no deviation or the deviation is less than 1 mm; make the handle in the preceding one side of facing the crystallizer and conveniently take the use, the handle can be for straight type or curved type, puts into clamping device with the laser pen during the use and presss from both sides tightly, opens the laser pen, and the crystallizer is put into with the support to handheld handle, and in the adjustment tundish car shift knob and sideslip device inject laser into in the tundish water gap, and centering is accomplished promptly, takes out central support.
By utilizing a CCD laser sensing technology, a probe is installed on the center of a tundish nozzle and serves as a signal receiver, a laser transmitter is installed on a support, after the signal receiver receives a laser signal, the signal is fed back to a control system, and the tundish car is controlled by the control system to move so that the tundish nozzle and a crystallizer are automatically and accurately centered.
The present invention is not limited to the above embodiments, and any structural changes made under the teaching of the present invention shall fall within the scope of the present invention, which is similar or similar to the technical solutions of the present invention.
The techniques, shapes, and configurations not described in detail in the present invention are all known techniques.
Claims (3)
1. A process method capable of realizing quick centering of a tundish is characterized by comprising the following steps:
1) the method is characterized in that a support is made of light materials according to the section of a poured casting blank, the support can be clamped into a crystallizer, the peripheral gap is less than or equal to 1.5mm, and a handle is made on the side facing the front of the crystallizer and is convenient to take and use;
2) manufacturing a clamping device at the center of the bracket, wherein the clamping device is used for clamping the laser emitting device and requires no deviation or deviation less than 1mm at the center position;
3) the laser emitting device is arranged on the clamping device, the signal receiver is arranged in the center of the tundish nozzle and connected with the control system, and the control system controls the tundish nozzle to be automatically centered with the crystallizer.
2. The process method capable of realizing rapid tundish centering according to claim 1, wherein the laser emitting device is a laser pen, and the centering is completed when rays emitted by the laser pen can be emitted into a tundish nozzle.
3. The process method capable of realizing rapid tundish centering as claimed in claim 1, wherein the laser emitter is a laser emitter, the signal receiver is a probe, the probe receives a signal from the laser emitter and feeds the signal back to the control system, and the control system controls the tundish nozzle to be automatically and accurately centered with the crystallizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210618663.4A CN114799151A (en) | 2022-06-01 | 2022-06-01 | Process method capable of realizing quick centering of tundish |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210618663.4A CN114799151A (en) | 2022-06-01 | 2022-06-01 | Process method capable of realizing quick centering of tundish |
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| CN114799151A true CN114799151A (en) | 2022-07-29 |
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| CN202210618663.4A Pending CN114799151A (en) | 2022-06-01 | 2022-06-01 | Process method capable of realizing quick centering of tundish |
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Citations (15)
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|---|---|---|---|---|
| CN1064230A (en) * | 1992-03-05 | 1992-09-09 | 绥棱县兴华钢厂 | A kind of method of continuous casting 60 * 60 mm square steel billets |
| CN101549400A (en) * | 2009-05-15 | 2009-10-07 | 首钢总公司 | Implementation of submerged nozzle rapid accurate centering by using laser and monitoring method |
| CN201848514U (en) * | 2010-09-16 | 2011-06-01 | 鞍钢股份有限公司 | Centering device for tundish outlet |
| US20110127002A1 (en) * | 2008-06-26 | 2011-06-02 | Hyundai Steel Company | Centering submerged entry nozzle for continuous casting of metal slab |
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| CN109211166A (en) * | 2018-09-30 | 2019-01-15 | 南京航空航天大学 | A kind of section structure part constrained based on wall thickness and external form is in machine fast calibrating device and its aligning method |
| CN209532088U (en) * | 2019-01-16 | 2019-10-25 | 武汉钢铁有限公司 | Centering device for tundish outlet |
| CN210334351U (en) * | 2019-07-19 | 2020-04-17 | 山西通才工贸有限公司 | Immersion type water gap centering device |
| CN210755156U (en) * | 2019-10-22 | 2020-06-16 | 中天钢铁集团有限公司 | Continuous casting tundish casting integral nozzle centering device |
| CN212419620U (en) * | 2020-07-06 | 2021-01-29 | 新疆昆玉钢铁有限公司 | Simple device system for calibrating and detecting tundish |
| CN214640267U (en) * | 2021-05-22 | 2021-11-09 | 乌海市包钢万腾钢铁有限责任公司 | Quick centering mechanism of middle package |
| CN114101652A (en) * | 2021-12-02 | 2022-03-01 | 山东钢铁集团日照有限公司 | Control method for centering precision of continuous casting submersed nozzle |
| CN114113187A (en) * | 2021-10-12 | 2022-03-01 | 北京金竟科技有限责任公司 | Mechanical centering device and method for cathode fluorescence system probe |
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2022
- 2022-06-01 CN CN202210618663.4A patent/CN114799151A/en active Pending
Patent Citations (15)
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| CN1064230A (en) * | 1992-03-05 | 1992-09-09 | 绥棱县兴华钢厂 | A kind of method of continuous casting 60 * 60 mm square steel billets |
| US20110127002A1 (en) * | 2008-06-26 | 2011-06-02 | Hyundai Steel Company | Centering submerged entry nozzle for continuous casting of metal slab |
| CN101549400A (en) * | 2009-05-15 | 2009-10-07 | 首钢总公司 | Implementation of submerged nozzle rapid accurate centering by using laser and monitoring method |
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| CN203610666U (en) * | 2013-11-15 | 2014-05-28 | 河北钢铁股份有限公司唐山分公司 | Off-line centring detection device for immersion nozzle |
| CN204247953U (en) * | 2014-07-08 | 2015-04-08 | 武汉钢铁(集团)公司 | A kind of tundish centralizer |
| CN109211166A (en) * | 2018-09-30 | 2019-01-15 | 南京航空航天大学 | A kind of section structure part constrained based on wall thickness and external form is in machine fast calibrating device and its aligning method |
| CN209532088U (en) * | 2019-01-16 | 2019-10-25 | 武汉钢铁有限公司 | Centering device for tundish outlet |
| CN210334351U (en) * | 2019-07-19 | 2020-04-17 | 山西通才工贸有限公司 | Immersion type water gap centering device |
| CN210755156U (en) * | 2019-10-22 | 2020-06-16 | 中天钢铁集团有限公司 | Continuous casting tundish casting integral nozzle centering device |
| CN212419620U (en) * | 2020-07-06 | 2021-01-29 | 新疆昆玉钢铁有限公司 | Simple device system for calibrating and detecting tundish |
| CN214640267U (en) * | 2021-05-22 | 2021-11-09 | 乌海市包钢万腾钢铁有限责任公司 | Quick centering mechanism of middle package |
| CN114113187A (en) * | 2021-10-12 | 2022-03-01 | 北京金竟科技有限责任公司 | Mechanical centering device and method for cathode fluorescence system probe |
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