CN113634727A - Automatic closing method and system for ladle sliding nozzle - Google Patents
Automatic closing method and system for ladle sliding nozzle Download PDFInfo
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- CN113634727A CN113634727A CN202110812131.XA CN202110812131A CN113634727A CN 113634727 A CN113634727 A CN 113634727A CN 202110812131 A CN202110812131 A CN 202110812131A CN 113634727 A CN113634727 A CN 113634727A
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- Prior art keywords
- ladle
- slag
- steel
- molten steel
- water gap
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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
- B22D11/181—Controlling or regulating processes or operations for pouring responsive to molten metal level or slag level
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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
- B22D41/14—Closures
- B22D41/22—Closures sliding-gate type, i.e. having a fixed plate and a movable plate in sliding contact with each other for selective registry of their openings
- B22D41/38—Means for operating the sliding gate
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Continuous Casting (AREA)
Abstract
The invention discloses a method and a system for automatically closing a ladle sliding nozzle, which comprise a ladle, wherein the bottom sliding nozzle of the ladle is communicated with a tundish through a protective pouring long nozzle, molten steel passes through the protective pouring long nozzle when the molten steel is poured, a layer of liquid steel slag is arranged right above the molten steel in the ladle, the outer side of the protective pouring long nozzle is provided with a molten steel pouring slag discharging automatic detection device, and the molten steel pouring slag discharging automatic detection device is connected with a ladle slag discharging detection signal acquisition system through a support rod and a rotary telescopic bracket. The invention innovatively and automatically closes the system of the sliding nozzle by detecting the slag discharging signal of molten steel pouring, does not need to be operated by operators, realizes full-automatic operation, prevents a large amount of liquid steel slag from pouring into the molten steel in the tundish to pollute the molten steel, protects the quality of the molten steel, and improves the overall safety and the overall treatment efficiency.
Description
Technical Field
The invention relates to the technical field of automatic detection control, in particular to a method and a system for automatically closing a ladle sliding nozzle.
Background
In the process of drawing steel by a continuous casting machine, molten steel is poured into a tundish from a ladle through a sliding nozzle, a long nozzle is hung on the lower part of the sliding nozzle of the ladle, and the lower end of the long nozzle is inserted into the molten steel in the tundish, so that the molten steel is not exposed in the air when the molten steel is poured into the tundish from the ladle, the molten steel is prevented from being secondarily oxidized, and the heat dissipation and the temperature reduction of the molten steel can be reduced.
The upper part of molten steel in a ladle is covered with a layer of liquid steel slag which has a large amount of harmful substances, if a large amount of steel slag is poured into the molten steel in a tundish, the molten steel can be polluted, the quality of the molten steel is seriously influenced, and when the molten steel in the ladle is poured and the slag starts to be discharged, a sliding nozzle needs to be closed in time.
In the casting process, due to the existence of the protective casting long nozzle, an operator cannot visually observe whether slag is discharged or not, and the long nozzle needs to be removed when the molten steel is not completely cast, so that a certain amount of molten steel is not subjected to protective casting, part of the molten steel is secondarily oxidized, and the quality of the molten steel is influenced. Meanwhile, the manual operation for closing the sliding nozzle is slow when the manual naked eye observes that the slag is discharged, and the quality of molten steel is influenced in a tundish in which partial steel slag is poured, so that the method and the system for automatically closing the steel ladle sliding nozzle are designed to solve the problems in the prior art.
Disclosure of Invention
The invention aims to provide a method and a system for automatically closing a ladle sliding nozzle, which aim to solve the problems in the background technology.
An automatic slag-discharging detection device (an electromagnetic induction detection method for detecting three signals, namely, no molten steel and steel slag pass through the long nozzle, molten steel passes through the long nozzle, and steel slag passes through the long nozzle) is arranged at the upper part of the long nozzle, and the molten steel pouring slag discharging is automatically detected.
A ladle sliding water gap automatic closing control system is installed on a ladle pouring operation platform, when the slag-off automatic detection device detects pouring slag-off, a slag-off signal is transmitted to the sliding water gap automatic closing control system, and the system automatically closes the sliding water gap.
In order to achieve the purpose, the invention provides the following technical scheme: the bottom end of the steel ladle is communicated with a tundish through a communicating pipe, molten steel is arranged in the steel ladle and the tundish, steel slag is layered right above the molten steel, an automatic pouring slag detection device is arranged on the outer side of the communicating pipe, the automatic pouring slag detection device is connected with a steel ladle slag detection signal acquisition system through a support rod and a rotary telescopic support, the other side of the steel ladle slag detection signal acquisition system is connected with a system control cabinet through a lead, the system control cabinet is connected with a sliding water gap switch control cabinet through a lead, a power hose is communicated with the bottom end of the sliding water gap switch control cabinet, the other end of the power hose is communicated with the bottom end of the steel ladle, and a movable water gap switch device is arranged on the outer side of the power hose.
A system for a ladle slide gate valve auto-close method, the system comprising the following configured major elements: PLC and programming software, a sliding water gap switch control device, a long water gap operating arm and control device, a steel slag detection sensor, a switch power supply, 2 sets of linear oil cylinders, 2 sets of oil cylinder electromagnetic valves, an intermediate relay, alarm equipment and a self-reset button.
Preferably, the PLC control system is connected with each component through a lead so as to carry out position detection, fault treatment, slide plate control, warning control and slag discharge detection.
Preferably, the system flow is as follows:
the method comprises the following steps: after the steel ladle reaches the pouring position and is provided with the upper long nozzle, a start button is pressed, and the steel slag detection sensor extends forwards and is attached to the protective pouring long nozzle;
step two: starting a sliding water gap opening and closing device, opening the sliding water gap, and allowing molten steel to flow into the long water gap through the injection port;
step three: when the slag falling sensor detects that steel slag passes through the protective pouring long nozzle, the sliding nozzle is immediately closed;
step four: withdrawing the steel slag detection sensor, outputting signals by a buzzer and a warning lamp, and prompting to remove the steel ladle;
step five: removing the steel ladle and eliminating the warning;
step six: if the alarm is given out when the molten steel is not poured due to the fact that the sensitivity of the slag sensor is not set accurately, the alarm can be manually released, and the slag tapping device can be restarted.
Compared with the prior art, the invention has the following beneficial effects:
1. the invention innovating the automatic opening and closing system of the molten steel pouring sliding nozzle, without the implementation operation of operators, realizes full-automatic operation, prevents a large amount of liquid steel slag from pouring into the molten steel in the tundish to pollute the molten steel, not only protects the quality of the molten steel, but also improves the overall safety and the overall treatment efficiency;
2. the sliding water gap is automatically closed when the slag is poured, so that the pollution of the molten steel caused by the large amount of slag discharged when the molten steel is poured is prevented, the quality of the molten steel and the quality of steel billets are ensured, the effect of treating the molten steel and the quality of the steel billets are improved, and various use requirements are met;
3. the invention closes the sliding water gap quickly in time, improves the operation efficiency and ensures the accuracy of the liquid discharge, thereby improving the processing effect.
Drawings
FIG. 1 is a schematic diagram of a system configuration according to the present invention;
FIG. 2 is a system control block diagram of the present invention;
fig. 3 is an electrical control schematic of the present invention.
In the figure: 1. a movable water gap opening and closing device; 2. a power hose; 3. a sliding water gap switch control cabinet; 4. pouring a slag discharging automatic detection device; 5. a steel ladle slag discharge detection signal acquisition system; 6. rotating the telescopic bracket; 7. a system control cabinet; 8. a steel ladle; 9. a tundish; 10. molten steel; 11. steel slag; 12. a sliding gate; 13. and (4) a long nozzle.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. 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.
Referring to fig. 1-3, an embodiment of the present invention is shown: a method and a system for automatically closing a steel ladle sliding nozzle are provided, wherein a sliding nozzle starting switch device is configured to realize the pneumatic switch function of the sliding nozzle; preparing a molten steel pouring slag automatic detection device; configuring an automatic opening and closing control system of the sliding water gap; a molten steel pouring slag signal acquisition and transmission control system is configured, wherein an electric control symbol in the attached figure 3 is as follows: SB (bus bar)0: start-up, SB1: reset, SQ1: slag signal, SA1: the steel slag detection sensor extends to the front position, KA: intermediate relay, KA1: reach/retrieve (slag detection sensor), KA2: open/close (sliding gate valve), KA3: and (6) warning.
The method and the system for automatically closing the ladle sliding nozzle have the following control flows:
1) firstly installing a protective pouring long nozzle after a steel ladle filled with molten steel reaches a pouring position, and then installing a molten steel pouring slag automatic detection device on the long nozzle;
2) starting an automatic opening and closing system of the sliding nozzle, opening the sliding nozzle, starting pouring, and detecting molten steel pouring information by an automatic slag tapping detection device;
3) when the detection device detects that the steel slag passes through the long nozzle, the control system acquires a slag discharging signal to automatically close the sliding nozzle;
4) after the ladle molten steel is poured, removing the molten steel pouring and slagging detection device, picking off the long nozzle, and using the ladle molten steel for pouring;
5) pouring the molten steel in the ladle, and repeating the process operations 1), 2), 3) and 4).
A method for automatically closing a ladle sliding nozzle comprises a ladle 8, wherein the bottom end of the ladle 8 is communicated with a tundish 9 through a communicating pipe, molten steel 10 is arranged inside the steel ladle 8 and the tundish 9, steel slag 11 is layered right above the molten steel 10, a pouring slag discharging automatic detection device 4 is arranged outside the communicating pipe, and the pouring slag-off automatic detection device 4 is connected with a steel ladle slag-off detection signal acquisition system 5 through a support rod and a rotary telescopic bracket 6, the other side of the steel ladle slag-off detection signal acquisition system 5 is connected with a system control cabinet 7 through a lead, the system control cabinet 7 is connected with a sliding water gap switch control cabinet 3 through a lead, the bottom end of the sliding water gap switch control cabinet 3 is communicated with a power hose 2, and the other end of the power hose 2 is communicated with the bottom end of the steel ladle 8, and the outer side of the power hose 2 is provided with a movable water gap switch device 1.
A system for a ladle slide gate valve auto-close method, the system comprising the following configured major elements: PLC Siemens/ohm dragon/Mitsubishi and programming software, a sliding water gap switch control device, a long water gap operating arm and control device, a steel slag detection sensor, a switch power supply, 2 sets of linear oil cylinders for controlling water gaps, a slag discharging detection device, 2 sets of oil cylinder electromagnetic valves, an intermediate relay, an alarm device buzzer/warning light and a self-reset button are red, green and yellow;
the PLC control system is connected with each component through a lead to carry out position detection, fault treatment, slide plate control, warning control and slag discharge detection, and the system flow is as follows:
the method comprises the following steps: after the steel ladle reaches the pouring position and is provided with the upper long nozzle, a start button is pressed, and the steel slag detection sensor extends forwards and is attached to the long nozzle;
step two: starting a sliding water gap opening and closing device, opening the sliding water gap, and allowing molten steel to flow into the long water gap through the injection port;
step three: when the slag discharging sensor detects that steel slag exists, the sliding water gap opening and closing device is immediately closed;
step four: withdrawing the steel slag detection sensor, outputting signals by a buzzer and a warning lamp, and prompting to remove the steel ladle;
step five: removing the steel ladle and eliminating the warning;
step six: if the alarm is given out when the molten steel is not poured due to the fact that the sensitivity of the slag sensor is not set accurately, the alarm can be manually released, and the slag tapping device can be restarted.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that various changes in the embodiments and/or modifications of the invention can be made, and equivalents and modifications of some features of the invention can be made without departing from the spirit and scope of the invention.
Claims (4)
1. A ladle sliding gate automatic closing method comprises a ladle (8), a sliding gate (12) and a long gate (13), and is characterized in that: the bottom sliding water gap (12) of the steel ladle (8) is communicated with the tundish (9) through the protective pouring long water gap (13), molten steel (10) is arranged in the steel ladle (8), the protective pouring long water gap (13) and the tundish (9) during molten steel pouring, a layer of liquid steel slag (11) is arranged right above the molten steel (10), a pouring slag discharging automatic detection device (4) is arranged on the outer side of the protective pouring long water gap (13), the pouring slag discharging automatic detection device (4) is connected with the steel ladle slag discharging detection signal acquisition system (5) through a support rod and a rotary telescopic support (6), the other side of the steel ladle slag discharging detection signal acquisition system (5) is connected with the system control cabinet (7) through a lead, the system control cabinet (7) is connected with the sliding water gap switch control cabinet (3) through a lead, and the bottom end of the sliding water gap (12) switch control cabinet (3) is communicated with the power hose (2), and the other end of the power hose (2) is communicated with the sliding water gap switch device (1).
2. A system of a ladle sliding gate automatic closing method is characterized in that: the system comprises the following configuration as main elements: PLC (Siemens/ohm dragon/Mitsubishi) and programming software, a sliding water gap switch control device, a long water gap operating arm and control device, a steel slag detection sensor, a switch power supply, a linear type oil cylinder 2 set (a control water gap and a slag discharging detection device), an oil cylinder electromagnetic valve 2 set, an intermediate relay, an alarm device (a buzzer/a warning light) and a self-reset button (red, green and yellow).
3. The system for the automatic closing method of the ladle sliding gate valve according to claim 2, wherein: the PLC control system is connected with each component through a lead so as to carry out position detection, fault treatment, slide plate control, warning control and slag discharge detection.
4. The system for the automatic closing method of the ladle sliding gate valve according to claim 2, wherein: the system flow is as follows:
the method comprises the following steps: after the steel ladle reaches the pouring position and is provided with the upper long nozzle, a start button is pressed, and the steel slag detection sensor extends forwards and is attached to the protective pouring long nozzle;
step two: starting a sliding water gap opening and closing device, opening the sliding water gap, and allowing molten steel to flow into the long water gap through the injection port;
step three: when the slag discharging sensor detects that steel slag exists, the sliding water gap opening and closing device is immediately closed;
step four: withdrawing the steel slag detection sensor, outputting signals by a buzzer and a warning lamp, and prompting to remove the steel ladle;
step five: removing the steel ladle and eliminating the warning;
step six: if the alarm is given out when the molten steel is not poured due to the fact that the sensitivity of the slag sensor is not set accurately, the alarm can be manually released, and the slag tapping device can be restarted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110812131.XA CN113634727A (en) | 2021-07-19 | 2021-07-19 | Automatic closing method and system for ladle sliding nozzle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110812131.XA CN113634727A (en) | 2021-07-19 | 2021-07-19 | Automatic closing method and system for ladle sliding nozzle |
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| Publication Number | Publication Date |
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| CN113634727A true CN113634727A (en) | 2021-11-12 |
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| CN202110812131.XA Pending CN113634727A (en) | 2021-07-19 | 2021-07-19 | Automatic closing method and system for ladle sliding nozzle |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06292960A (en) * | 1993-04-09 | 1994-10-21 | Nippon Steel Corp | Method for measuring pouring flow rate of molten metal |
| JP2005059016A (en) * | 2003-08-18 | 2005-03-10 | Nippon Steel Corp | Continuous casting method |
| JP2005334936A (en) * | 2004-05-27 | 2005-12-08 | Nippon Steel Corp | Ladle pouring process in continuous casting machine |
| US20060266796A1 (en) * | 2003-06-13 | 2006-11-30 | Mats Jalk | Method and a device for detecting slag |
| CN101349677A (en) * | 2008-08-29 | 2009-01-21 | 湖南镭目科技有限公司 | Bale slag-blanking vibrating detection device |
| CN101905302A (en) * | 2010-08-10 | 2010-12-08 | 田陆 | Slag detection method and detection system for continuous casting ladles |
| CN101947642A (en) * | 2010-09-14 | 2011-01-19 | 浙江工业大学 | Vibrating ladle slag carry-over detection-oriented embedded data acquisition system |
| CN102527969A (en) * | 2010-12-23 | 2012-07-04 | 北京中远通科技有限公司 | Automatic ladle slag outflow detection system and method thereof |
| CN204639089U (en) * | 2015-03-26 | 2015-09-16 | 麦格瑞冶金工程技术（北京）有限公司 | A kind of ladle roughing slag control device improving molten steel recovery rate |
| CN105983673A (en) * | 2015-02-28 | 2016-10-05 | 宝山钢铁股份有限公司 | Continuous casting ladle final casting control system based on ladle discharged slag detection system and process control method |
-
2021
- 2021-07-19 CN CN202110812131.XA patent/CN113634727A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06292960A (en) * | 1993-04-09 | 1994-10-21 | Nippon Steel Corp | Method for measuring pouring flow rate of molten metal |
| US20060266796A1 (en) * | 2003-06-13 | 2006-11-30 | Mats Jalk | Method and a device for detecting slag |
| JP2005059016A (en) * | 2003-08-18 | 2005-03-10 | Nippon Steel Corp | Continuous casting method |
| JP2005334936A (en) * | 2004-05-27 | 2005-12-08 | Nippon Steel Corp | Ladle pouring process in continuous casting machine |
| CN101349677A (en) * | 2008-08-29 | 2009-01-21 | 湖南镭目科技有限公司 | Bale slag-blanking vibrating detection device |
| CN101905302A (en) * | 2010-08-10 | 2010-12-08 | 田陆 | Slag detection method and detection system for continuous casting ladles |
| CN101947642A (en) * | 2010-09-14 | 2011-01-19 | 浙江工业大学 | Vibrating ladle slag carry-over detection-oriented embedded data acquisition system |
| CN102527969A (en) * | 2010-12-23 | 2012-07-04 | 北京中远通科技有限公司 | Automatic ladle slag outflow detection system and method thereof |
| CN105983673A (en) * | 2015-02-28 | 2016-10-05 | 宝山钢铁股份有限公司 | Continuous casting ladle final casting control system based on ladle discharged slag detection system and process control method |
| CN204639089U (en) * | 2015-03-26 | 2015-09-16 | 麦格瑞冶金工程技术（北京）有限公司 | A kind of ladle roughing slag control device improving molten steel recovery rate |
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Application publication date: 20211112 |
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