CN112122573B - Method for preventing blank shell from being detached after bonding alarm of ultra-wide slab continuous casting machine - Google Patents
Method for preventing blank shell from being detached after bonding alarm of ultra-wide slab continuous casting machine Download PDFInfo
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- CN112122573B CN112122573B CN202010964444.2A CN202010964444A CN112122573B CN 112122573 B CN112122573 B CN 112122573B CN 202010964444 A CN202010964444 A CN 202010964444A CN 112122573 B CN112122573 B CN 112122573B
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- crystallizer
- blank shell
- stopper rod
- pulling speed
- shell
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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
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- Mechanical Engineering (AREA)
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Abstract
The invention discloses a method for preventing a blank shell from being detached after bonding alarm of an ultra-wide slab continuous casting machine, which comprises the following steps of: 1) setting an automatic deceleration value, holding time and starting pull speed after a blank shell bonding alarm of a crystallizer expert system is generated through a background server; 2) after the blank shell is bonded and alarmed, the pulling speed is automatically reduced to 0m/min, and the stopper rod is automatically closed along with the reduction of the pulling speed; 3) before the pulling speed is started, the stopper rod flow control is switched to a manual mode to continuously close the stopper rod, the liquid level of the molten steel of the crystallizer is reduced after the pulling straightening is started, and whether a blank shell descends or not is watched; 4) if the blank shell descends, the liquid level of the molten steel in the crystallizer is slowly raised to a normal pouring position; 5) if the blank shell does not descend, stopping the pulling speed manually, closing the stopper, keeping the pulling speed at 0m/min for 8s, and then starting the pulling and straightening manually to reduce the liquid level of the molten steel in the crystallizer; the invention improves the healing capability and the demoulding capability of the bonded blank shell, can find whether the blank shell is separated in time, and avoids the occurrence of breakout accidents.
Description
Technical Field
The invention relates to the technical field of steel making, in particular to a method for preventing a blank shell from being detached after bonding alarm of an ultra-wide slab continuous casting machine.
Background
Breakout is one of the most serious accidents in continuous casting production, and damages to production and equipment are serious. In half a year of hot trial operation of the 3250mm ultra-wide slab continuous casting machine, 4 times of breakout accidents occur, and the breakout accidents are caused by the fact that a bonded slab shell cannot be separated from a crystallizer copper plate after bonding alarm. Because the super-wide slab continuous casting machine has a large width-thickness ratio and a special machine type, the phenomenon that a billet shell cannot be separated is more easily caused, production equipment is damaged, and great potential safety hazards exist. Therefore, a method for solving the problem that the blank shell cannot be separated after the bonding alarm of the ultra-wide slab continuous casting machine is designed is needed to solve the problems of steel leakage accidents and potential safety hazards.
Disclosure of Invention
Aiming at the problems in the prior art, the invention aims to provide a method for preventing a blank shell from being detached after bonding alarm of an ultra-wide slab continuous casting machine.
The technical scheme adopted by the invention for solving the technical problems is as follows: a method for preventing a blank shell from being detached after bonding alarm of an ultra-wide slab continuous casting machine comprises the following steps:
1) setting an automatic deceleration value, holding time and starting pull speed after a blank shell bonding alarm of a crystallizer expert system is generated through a background server;
2) the pulling speed is automatically reduced to 0m/min after the crystallizer expert system sends out a green shell bonding alarm in an activated state, and the stopper rod is automatically closed along with the reduction of the pulling speed;
3) before the pulling speed is started, the stopper rod flow control is switched to a manual mode to continuously close the stopper rod, the liquid level of the molten steel of the crystallizer is reduced after the pulling straightening is started, and whether a blank shell descends or not is watched;
4) if the blank shell descends, the bonded blank shell is separated from the crystallizer copper plate, and then the stopper rod is gradually opened to ensure that the liquid level of the molten steel of the crystallizer slowly rises to a normal pouring position;
5) if the blank shell does not descend, the pulling speed needs to be manually stopped again, the liquid level of the molten steel in the crystallizer is slowly supplemented to the normal pouring position, the stopper rod is closed, and after the pulling speed is kept for 8s at 0m/min, the liquid level of the molten steel in the crystallizer is reduced after the pulling and straightening are manually started.
Specifically, the deceleration value in the step 1 is set to 0m/min, the holding time is set to 8s, and the pull-up speed for starting is set to 0.3 m/min.
Specifically, after the stopper rod in the step 2 is automatically closed, the pulling speed of 0m/min is kept for 8s, and then the pulling and straightening are automatically started at the pulling speed of 0.3 m/min.
Specifically, after the liquid level of the molten steel in the crystallizer in the step 4 rises to a normal pouring position, the opening degree of the stopper rod is adjusted, and after the liquid level of the molten steel in the crystallizer is stabilized for 5 seconds, the stopper rod is automatically controlled in a mode, and the pulling speed is gradually increased.
Specifically, after the liquid level of the molten steel in the crystallizer in the step 5 is lowered, whether the blank shell descends or not is observed again, and if the blank shell does not descend, the blank shell must be laid, so that the condition that the blank shell is torn to cause steel leakage is avoided.
The invention has the following beneficial effects:
the method for solving the problem that the blank shell cannot be separated after the bonding alarm of the ultra-wide slab casting machine improves the healing capability and the demolding capability of the bonded blank shell through the operations of reducing the speed value, keeping time, starting and pulling speed and checking whether the blank shell walks or not in the speed-increasing curve after the bonding alarm, can find whether the blank shell is separated or not in time, avoids the occurrence of steel leakage accidents, protects the safety of production equipment and personnel, avoids the potential safety hazard problem and has good popularization value.
Detailed Description
The technical scheme in the embodiment of the invention is clearly and completely further detailed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The method for solving the problem that the blank shell cannot be separated after the bonding alarm of the ultra-wide slab caster adopts the following operation mode, improves the healing capacity and the demolding capacity of the bonded blank shell, can find out whether the blank shell is separated or not in time, and avoids the occurrence of steel leakage accidents.
The method specifically comprises the following steps:
1) setting an automatic deceleration value, holding time and starting pulling speed of the crystallizer expert system after blank shell bonding alarm through a background server, wherein the deceleration value is set to be 0m/min, the holding time is set to be 8s, and the starting pulling speed is set to be 0.3 m/min;
2) the pulling speed is automatically reduced to 0m/min after the crystallizer expert system sends out a green shell bonding alarm in an activated state, the stopper rod is automatically closed along with the reduction of the pulling speed, and after the pulling speed of 0m/min is kept for 8s, the pulling and straightening are automatically started at the pulling speed of 0.3 m/min;
3) before the pulling speed is started, the stopper rod flow control is switched to a manual mode to continuously close the stopper rod, the liquid level of the molten steel of the crystallizer is reduced after the pulling straightening is started, and whether a blank shell descends or not is watched;
4) if the blank shell descends, the bonded blank shell is separated from the crystallizer copper plate, then the stopper rod is gradually opened, the liquid level of the molten steel of the crystallizer is slowly raised to a normal pouring position, the opening degree of the stopper rod is adjusted, and after the liquid level of the molten steel of the crystallizer is stabilized for 5 seconds, the stopper rod is rotated to automatically control the mode and gradually increase the pulling speed;
5) if the billet shell does not descend, the pulling speed needs to be manually stopped again, the liquid level of the molten steel in the crystallizer is slowly supplemented to a normal pouring position, the stopper rod is closed, after the pulling speed is kept at 0m/min for 8s, the liquid level of the molten steel in the crystallizer is reduced after pulling and straightening is manually started, whether the billet shell descends or not is watched again, and if the billet shell does not descend, billet laying treatment needs to be carried out, so that the billet shell is prevented from being torn, and steel leakage is avoided.
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 (2)
1. A method for preventing a blank shell from being detached after bonding alarm of an ultra-wide slab continuous casting machine is characterized by comprising the following steps:
1) setting an automatic deceleration value, holding time and starting pull speed after a blank shell bonding alarm of a crystallizer expert system is generated through a background server;
2) the pulling speed is automatically reduced to 0m/min after the crystallizer expert system sends out a green shell bonding alarm in an activated state, the stopper rod is automatically closed along with the reduction of the pulling speed, and after the stopper rod is automatically closed and the pulling speed of 0m/min is kept for 8s, the pulling and straightening are automatically started at the pulling speed of 0.3 m/min;
3) before the pulling speed is started, the stopper rod flow control is switched to a manual mode to continuously close the stopper rod, the liquid level of the molten steel of the crystallizer is reduced after the pulling straightening is started, and whether a blank shell descends or not is watched;
4) if the blank shell descends, the bonded blank shell is separated from the crystallizer copper plate, then the stopper rod is gradually opened, the liquid level of the molten steel of the crystallizer is slowly raised to a normal pouring position, the opening degree of the stopper rod is adjusted, and after the liquid level of the molten steel of the crystallizer is stabilized for 5 seconds, the stopper rod is rotated to automatically control the mode and gradually increase the pulling speed;
5) if the billet shell does not descend, the pulling speed needs to be manually stopped again, the liquid level of the molten steel in the crystallizer is slowly supplemented to a normal pouring position, the stopper rod is closed, after the pulling speed is kept at 0m/min for 8s, the liquid level of the molten steel in the crystallizer is reduced after the pulling correction is manually started, whether the billet shell descends is watched again after the liquid level of the molten steel in the crystallizer is reduced, if the billet shell does not descend, the billet-laying treatment needs to be carried out, and the billet shell is prevented from being torn, so that steel leakage is avoided.
2. The method for solving the problem that the blank shell cannot be separated after the bonding alarm of the ultra-wide slab continuous casting machine is carried out according to claim 1, wherein the speed reduction value in the step 1 is set to be 0m/min, the holding time is set to be 8s, and the pull speed for starting is set to be 0.3 m/min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010964444.2A CN112122573B (en) | 2020-09-15 | 2020-09-15 | Method for preventing blank shell from being detached after bonding alarm of ultra-wide slab continuous casting machine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010964444.2A CN112122573B (en) | 2020-09-15 | 2020-09-15 | Method for preventing blank shell from being detached after bonding alarm of ultra-wide slab continuous casting machine |
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| Publication Number | Publication Date |
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| CN112122573A CN112122573A (en) | 2020-12-25 |
| CN112122573B true CN112122573B (en) | 2022-01-04 |
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| CN114346193A (en) * | 2021-12-24 | 2022-04-15 | 柳州钢铁股份有限公司 | Technological method for preventing longitudinal cracks and bonded breakout generated in starting process of slab caster |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101934353A (en) * | 2009-06-30 | 2011-01-05 | 上海宝信软件股份有限公司 | Device and method for breakout prediction during slab continuous casting |
| CN102825234A (en) * | 2012-09-25 | 2012-12-19 | 鞍钢股份有限公司 | Bonded bleed-out judging and alarming method |
| CN103170597A (en) * | 2011-12-20 | 2013-06-26 | 攀钢集团攀枝花钢钒有限公司 | Continuous casting method for steel billets |
| CN105689675A (en) * | 2015-07-24 | 2016-06-22 | 安徽工业大学 | Cure control method for continuous casting steel breakout by sticking |
| CN108941495A (en) * | 2017-05-17 | 2018-12-07 | 上海梅山钢铁股份有限公司 | The automatic method of disposal of continuous casting bleed-out accident based on liquid automatic control |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6083759A (en) * | 1983-10-15 | 1985-05-13 | Sumitomo Metal Ind Ltd | Foreseeing method of breakout in continuous casting |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101934353A (en) * | 2009-06-30 | 2011-01-05 | 上海宝信软件股份有限公司 | Device and method for breakout prediction during slab continuous casting |
| CN103170597A (en) * | 2011-12-20 | 2013-06-26 | 攀钢集团攀枝花钢钒有限公司 | Continuous casting method for steel billets |
| CN102825234A (en) * | 2012-09-25 | 2012-12-19 | 鞍钢股份有限公司 | Bonded bleed-out judging and alarming method |
| CN105689675A (en) * | 2015-07-24 | 2016-06-22 | 安徽工业大学 | Cure control method for continuous casting steel breakout by sticking |
| CN108941495A (en) * | 2017-05-17 | 2018-12-07 | 上海梅山钢铁股份有限公司 | The automatic method of disposal of continuous casting bleed-out accident based on liquid automatic control |
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