Method for preventing bleed-out of sliding plate

Abstract

The invention relates to the technical field of steel-making steel ladle sliding plates, and discloses a method for preventing sliding plate bleed-out, which comprises the following steps: monitoring the closing state of a sliding plate in real time in the process of continuously casting a long nozzle of a pouring sleeve; when it is detected that the sliding plate cannot be closed completely, the operation of sleeving the long nozzle is stopped immediately; the sliding plate is completely opened to the maximum opening degree, and a sliding plate mechanism controller is locked; and the casting speed is dynamically adjusted through a continuous casting machine control system, so that the tundish molten steel page is maintained in a set range, and the pouring state is continuously detected until molten steel is poured. And when it is detected that the sliding plate cannot be closed, compressed air is used for cooling the sliding nozzle mechanism and the sliding plate, and the steel seepage point is prevented from being expanded. Gigabit before steel seepage can be controlled, accident expansion is prevented, the probability of steel leakage of the sliding plate in the steel ladle pouring process is reduced, operation is easy, and implementation difficulty and cost are low.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel ladle sliding plate, in particular to a method for preventing steel leakage of sliding plate. BACKGROUND

[0002] The existing method for preventing steel leakage of sliding plate during pouring mainly improves the quality of refractory material, the installation operation of sliding plate and the optimization of mechanism, such as improving the quality of sliding plate and nozzle seat, optimizing the uniformity of sliding plate installation and fire clay application, and strengthening the offline maintenance of mechanism, etc. These technologies only reduce the probability of steel leakage of sliding plate, and do not reflect how to remedy and prevent the expansion of the accident after the leakage of sliding plate during pouring. SUMMARY

[0003] In order to overcome the above-mentioned defects of the prior art, the purpose of the present application is to provide a method for preventing steel leakage of sliding plate, which mainly takes the method immediately after the occurrence of the leakage of sliding plate during pouring of the ladle, so as to reduce the probability of steel leakage of the ladle during pouring.

[0004] The technical scheme adopted by the present application to solve the technical problem is: a method for preventing steel leakage of sliding plate, comprising the following steps:

[0005] Real-time monitoring of the closed state of the sliding plate during continuous casting and long nozzle pouring;

[0006] When it is detected that the sliding plate cannot be closed, the long nozzle pouring operation is immediately stopped;

[0007] Fully open the sliding plate to the maximum opening and lock the sliding plate mechanism controller;

[0008] Adjust the pulling speed through the continuous casting machine control system to maintain the tundish steel page within the set range, and continuously detect the pouring state until the steel is poured.

[0009] As a further improvement of the present application: further comprising: when it is detected that the sliding plate cannot be closed, compressed air is used to cool the sliding nozzle mechanism and the sliding plate to prevent the expansion of the steel leakage point.

[0010] As a further improvement of the present application: the step of detecting whether the sliding plate can be closed includes:

[0011] Observing whether there is a phenomenon of steel leakage after the closing operation of the sliding plate;

[0012] Determining whether the sliding plate is completely closed through the feedback signal of the sliding mechanism controller.

[0013] As a further improvement of the present application: the step of real-time monitoring of the closed state of the sliding plate includes:

[0014] Install displacement sensor on the slide plate mechanism to collect slide plate position signal in real time;

[0015] Set pressure sensor to monitor slide plate closing pressure;

[0016] Compare the detected slide plate position with the instructed position;

[0017] When the position signal shows that the slide plate is not fully closed and the closing pressure is lower than 5MPa, or when the deviation between the actual position and the instructed position exceeds 3mm, it is determined that the slide plate is in the state of not being able to close.

[0018] As a further improvement of the present application: the step of cooling using compressed air includes:

[0019] Direct the compressed air nozzle at the contact area between the slide gate mechanism and the slide plate;

[0020] Adjust the flow rate and pressure of the compressed air to ensure effective cooling of the steel penetration point.

[0021] As a further improvement of the present application: the slide plate mechanism controller includes:

[0022] Cut off the power supply of the slide plate driving device;

[0023] Activate the mechanical locking device to fix the slide plate position;

[0024] Set a prohibition of operation indicator on the control panel.

[0025] As a further improvement of the present application: it further includes: before ladle casting, pre-checking the slide plate mechanism to confirm that the slide plate opening and closing function is normal, the pre-checking content includes slide plate opening and closing stroke test, mortar application uniformity inspection, mechanism lubrication state confirmation and control signal response test.

[0026] As a further improvement of the present application: the specific steps of dynamically adjusting the pulling speed are:

[0027] Establish the corresponding relationship curve between the intermediate ladle liquid level height and the pulling speed;

[0028] Set the liquid level fluctuation alarm threshold to ±5mm;

[0029] Use PID control algorithm to adjust the pulling speed in real time;

[0030] The adjustment frequency is not less than 10 times per minute.

[0031] As a further improvement of the present application: it further includes an accident post-processing step:

[0032] Immediately close the ladle slide gate after casting is completed;

[0033] Force cooling of the slide plate mechanism;

[0034] Disassemble the slide plate and check the clamping steel condition and record.

[0035] As a further improvement of the application: also includes the risk of steel penetration warning step:

[0036] Establish a slide plate working state database to record historical abnormal event parameters;

[0037] Analyze the similarity of the current working parameters and historical abnormal data through a machine learning algorithm;

[0038] When the similarity exceeds the threshold, an early warning signal is issued.

[0039] Compared with the prior art, the beneficial effects of the application are:

[0040] When the slide plate cannot be closed during the long nozzle setting of the continuous casting, the long nozzle is not set, the slide plate is opened, and the continuous casting ladle operator is strictly prohibited from moving the slide plate again, the casting speed is controlled to control the liquid level of the continuous casting tundish, and the pouring is completed. Control the precursor before steel penetration, prevent the accident from expanding, and reduce the probability of steel leakage during pouring. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1 The flowchart of the application. DETAILED DESCRIPTION

[0042] In order to make the purpose, technical scheme and advantages of the application clearer, the technical scheme of the application will be described clearly and completely below in combination with specific embodiments of the application and corresponding drawings. Obviously, the described embodiments are only part of the embodiments of the application, not all embodiments. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the application.

[0043] In order to solve the technical problems in the prior art, the application will be further described in combination with the drawings and embodiments:

[0044] As Figure 1 shown, the application discloses a method for preventing slide plate leakage, comprising the following steps: during the continuous casting and pouring of the long nozzle, the slide plate closing state is monitored in real time; when it is detected that the slide plate cannot be closed, the long nozzle operation is immediately stopped; the slide plate is completely opened to the maximum opening degree, and the slide plate mechanism controller is locked; the casting speed is dynamically adjusted through the continuous casting machine control system, so that the tundish steel water page is maintained within the set range, and the pouring state is continuously detected until the molten steel is poured.

[0045] Slip plate is the core refractory component of slide gate system, usually made of two pieces of high alumina carbon refractory material, which controls the flow rate of molten steel or cuts off the flow by relative sliding. Slip plate is installed inside the slide gate mechanism, which is the key executive component. Slide gate mechanism is used to control the movement of slip plate, which can accurately control the opening and closing stroke of slip plate, provide the pressure required for slip plate closure and integrate safety locking function.

[0046] "Slip plate can't close": refers to the slip plate itself can't close due to clamping steel or deformation, which needs to stop the operation of the slide gate mechanism.

[0047] Before pouring: adjust the position of slip plate through the slide gate mechanism to ensure that the gate is completely closed.

[0048] During pouring: if the slip plate can't close, stop the operation of the slide gate mechanism (lock control), and start the cooling system protection mechanism at the same time.

[0049] After pouring: remove the slip plate for inspection, and analyze whether the drive of the slide gate mechanism is normal (such as stroke deviation).

[0050] Through real-time monitoring and rapid response mechanism, it can intervene in the early stage of the leakage accident to avoid the expansion of the accident and reduce the leakage accident rate. The setting of the locking slip plate mechanism prevents misoperation, maintains a stable steel flow channel, and can effectively avoid secondary accidents caused by the panic of the operator. Dynamic speed regulation ensures the continuity of the pouring process, which avoids overflow and prevents flow interruption.

[0051] In some embodiments, the locking slip plate mechanism controller comprises:

[0052] Cut off the power supply of the slip plate driving device;

[0053] Activate the mechanical locking device to fix the position of the slip plate;

[0054] Set the prohibition operation mark on the control panel.

[0055] Multiple locking mechanisms ensure operation safety, electrical isolation eliminates the risk of accidental triggering, mechanical locking provides physical protection, and human-machine interface warning forms an operation barrier.

[0056] Further, it also includes operation permission management: when the emergency control program is triggered, the slip plate operation permission is automatically locked; only the operator with high-level permission can unlock; all operation instructions need double confirmation.

[0057] Further, the specific steps of dynamic speed regulation are:

[0058] Establish the corresponding relationship curve between the liquid level height of the tundish and the casting speed;

[0059] Set the liquid level fluctuation alarm threshold to ±5mm;

[0060] PID control algorithm is used to adjust the pulling speed in real time;

[0061] The adjustment frequency is not less than 10 times per minute.

[0062] Dynamic curve matching different steel process requirements, high frequency regulation to maintain stable liquid level, intelligent algorithm compensation system lag.

[0063] In some embodiments, further comprising: when detecting that the slide plate cannot be closed, using compressed air to cool the slide nozzle mechanism and the slide plate to prevent the expansion of the steel penetration point.

[0064] Increased compressed air cooling, quickly removes the heat of the steel penetration point, delays the speed of metal melting loss, forms a gas film isolation layer between the slide plate and the mechanism, reduces the penetration of molten steel, and cooperates with the locking mechanism to form a double protection of "physical block + thermal protection".

[0065] Further, the step of using compressed air to cool includes:

[0066] Directing the compressed air nozzle at the contact area of the slide nozzle mechanism and the slide plate;

[0067] Adjusting the flow and pressure of the compressed air to ensure effective cooling of the steel penetration point.

[0068] Further, the compressed air cooling specifically includes:

[0069] Real-time monitoring of the temperature change of the slide plate;

[0070] Dynamic adjustment of the compressed air flow according to the temperature change curve;

[0071] When the temperature drop rate is less than 5℃ / min, automatically increase the compressed air pressure by 0.1MPa Some embodiments, further comprising: the step of detecting whether the slide plate can be closed includes:

[0072] Observing whether there is molten steel leakage phenomenon after the slide plate is closed;

[0073] Determining whether the slide plate is completely closed through the feedback signal of the slide mechanism controller.

[0074] Using a double detection mechanism to improve the accuracy of the judgment, visual observation makes up for the blind area of the sensor, especially suitable for small leakage identification.

[0075] Further, the step of real-time monitoring of the slide plate closing state includes:

[0076] Installing a displacement sensor on the slide plate mechanism to collect slide plate position signals in real time;

[0077] Setting a pressure sensor to monitor the slide plate closing pressure;

[0078] The detected slide plate position is compared with the instruction position;

[0079] When the position signal shows that the slide plate is not fully closed and the closing pressure is lower than 5 MPa, or when the deviation between the actual position and the instruction position exceeds 3 mm, it is determined that the slide plate is in the dead closing state.

[0080] Multi-sensor fusion improves state recognition accuracy, sets mechanical-displacement double criteria, reduces false alarms, and provides accurate fault degree evaluation for subsequent control.

[0081] In some embodiments, the method further comprises a steel penetration risk warning step:

[0082] A slide plate working state database is established to record historical abnormal event parameters;

[0083] The similarity between the current working parameters and the historical abnormal data is analyzed through a machine learning algorithm;

[0084] When the similarity exceeds a threshold, an early warning signal is issued.

[0085] Historical data mining discovers potential rules, provides early warning to create a processing time window, and self-adapts the threshold to improve alarm accuracy.

[0086] In some embodiments, the method further comprises: before ladle casting, pre-inspecting the slide plate mechanism to confirm that the slide plate opening and closing function is normal, and the pre-inspection content includes slide plate opening and closing stroke test, fire clay application uniformity inspection, mechanism lubrication state confirmation, and control signal response test.

[0087] The preventive detection system discovers potential faults and hidden dangers in advance, the standardized detection process ensures preparation quality, and a complete prevention and control chain of "prevention-emergency" is formed.

[0088] In some embodiments, the method further comprises an accident post-processing step:

[0089] Immediately after casting is completed, the ladle slide gate is closed;

[0090] The slide plate mechanism is forcibly cooled;

[0091] After the slide plate is disassembled, the steel clamping condition is checked and recorded.

[0092] After the accident, forced cooling is performed to prevent residual heat damage, and systematic inspection is performed to locate the fault source.

[0093] Case 1:

[0094] The embodiment of the application discloses a method for preventing slide plate leakage, comprising the following steps: when a ladle is sleeved with a continuous casting long nozzle, it is detected that the slide plate cannot be closed, the long nozzle is not sleeved, the slide plate is opened, and the slide plate is strictly prohibited from being operated again; the casting speed is controlled to control the liquid level of the continuous casting tundish until the molten steel is poured.

[0095] The step of prohibiting the slide plate from being actuated again specifically includes:

[0096] Locking the slide mechanism controller to prohibit any manual or automatic operation;

[0097] Real-time monitoring of the slide plate state through the monitoring system to ensure that the slide plate remains in the open position.

[0098] Specifically, for furnace number 111, during the continuous casting pouring process and the long nozzle sleeving process, the ladle operator found that the slide plate could not be closed, the machine operator informed the ladle operator to open the slide plate, and then strictly prohibited the operation of the slide mechanism controller, the casting speed was used to stabilize the liquid surface of the tundish, and the pouring of the molten steel was completed. The slide plate was removed from the ladle, and it was found that the slide range was clamped with steel, as shown in the figure. The method of the present application avoids the expansion of the accident and prevents the slide plate from leaking steel.

[0099] The step of adjusting the continuous casting speed includes: dynamically adjusting the casting speed according to the real-time data of the liquid surface of the tundish; and keeping the liquid surface stable within a preset range until the pouring of the molten steel is completed.

[0100] The above measures are proposed on the premise of improving the quality of the slide plate and the nozzle seat, optimizing the uniformity of the slide plate installation and fire clay application, and strengthening the mechanism line maintenance and the like.

[0101] Case two:

[0102] The embodiment of the present application discloses a method for preventing the slide plate from leaking steel, which includes the following steps: when the slide plate cannot be closed, compressed air is used to cool the mechanism and the slide plate, the steel penetration point is prevented from expanding, and the melting loss mechanism is prevented from expanding.

[0103] Specifically, for furnace number 222, during the continuous casting pouring process and the long nozzle sleeving process, the ladle operator found that the slide plate could not be closed, the machine operator informed the ladle operator to open the slide plate, and then strictly prohibited the operation of the slide mechanism controller, and compressed air was used to cool the middle part of the slide nozzle mechanism, the casting speed was used to stabilize the liquid surface of the tundish, and the pouring of the molten steel was completed. The slide plate was removed from the ladle, and it was found that the slide range was clamped with steel, and investigation found that the installation of the nozzle on the ladle was not standardized, which led to serious clamping of steel. The present application avoids the expansion of the accident and prevents the slide plate from leaking steel.

[0104] The specific operation of using the casting speed to control the liquid surface of the tundish in continuous casting is to adjust the casting speed of the continuous casting machine to stabilize the liquid surface of the molten steel in the tundish.

[0105] The above measures for preventing the ladle slide plate from leaking steel reduce the probability of leakage of the ladle during the pouring process, are simple to operate, have low implementation difficulty, and have low implementation cost.

[0106] The main functions of the present application are:

[0107] 1. The present application is mainly aimed at the steel ladle in the pouring process appears the slide plate steel or the leakage of steel omen, the post immediately takes the long nozzle, opens the slide plate, strictly prohibits the slide plate again, uses the pulling speed control continuous casting tundish liquid level, until the measures of pouring, reduces the probability of leakage, prevents the accident expansion.

[0108] 2, When the slide plate does not die, the compressed air cooling mechanism and the slide plate can also be used to prevent the expansion of the steel penetration point and cause the melting mechanism to expand the accident.

[0109] It should be noted that the terms such as "first" and "second" and the like in the specification and claims of the present application and the above-described drawings are merely used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between the entities or operations. Moreover, the terms "include", "contain" or any other variant thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitations, the element defined by the statement "including a" does not exclude the presence of another identical element in the process, method, article or equipment including the element.

[0110] It should be noted that the terms used herein are only for the purpose of describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. As used herein, the singular form is intended to include the plural form unless the context clearly indicates otherwise, and it should be understood that when the terms "contain" and / or "include" are used in the specification, there are features, steps, operations, components, assemblies and / or their combinations.

[0111] The above is only a specific embodiment of the present application, which enables those skilled in the art to understand or implement the present application. Various modifications of these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A method for preventing steel leakage from a sliding plate, characterized in that, Includes the following steps: During the continuous casting process of the long nozzle, the closure status of the sliding plate is monitored in real time. If the slide gate fails to close completely, immediately stop the long sprue operation. Fully open the skateboard to its maximum opening and lock the skateboard mechanism controller; The casting speed is dynamically adjusted by the continuous casting machine control system to keep the molten steel level in the tundish within the set range, and the casting status is continuously monitored until the molten steel is poured.

2. The method for preventing steel leakage from a sliding plate according to claim 1, characterized in that, Also includes: When it is detected that the slide gate cannot be closed properly, compressed air is used to cool the sliding gate mechanism and the slide gate to prevent the steel seepage point from expanding.

3. The method for preventing steel leakage from a sliding plate according to claim 1, characterized in that, Also includes: The steps to check if the skateboard can be closed properly include: Observe whether there is any leakage of molten steel after the sliding plate is closed; The feedback signal from the sliding mechanism controller determines whether the slide is completely closed.

4. The method for preventing steel leakage from a sliding plate according to claim 1, characterized in that, The steps for real-time monitoring of the skateboard closure status include: Install displacement sensors on the skateboard mechanism to collect skateboard position signals in real time; Install a pressure sensor to monitor the sliding plate closing pressure; The detected skateboard position is compared with the command position; When the position signal indicates that the slide is not fully closed and the closing pressure is less than 5MPa, or when the deviation between the actual position and the commanded position exceeds 3mm, it is determined that the slide cannot be fully closed.

5. The method for preventing steel leakage from a sliding plate according to claim 1, characterized in that, The steps for cooling using compressed air include: Aim the compressed air nozzle at the contact area between the sliding gate mechanism and the slide plate; Adjust the flow rate and pressure of compressed air to ensure effective cooling of the steel penetration points.

6. The method for preventing steel leakage from a sliding plate according to claim 1, characterized in that, The locking slide mechanism controller includes: Disconnect the power supply to the skateboard drive unit; Activate the mechanical locking device to fix the slide plate position; Set a prohibited operation label in the control panel.

7. The method for preventing steel leakage from a sliding plate according to claim 1, characterized in that, Also includes: Before the steel ladle is poured, the slide mechanism is pre-inspected to confirm that the slide opening and closing function is normal. The pre-inspection includes slide opening and closing stroke test, fire clay coating uniformity check, mechanism lubrication status confirmation and control signal response test.

8. The method for preventing steel leakage from a sliding plate according to claim 1, characterized in that, The specific steps for dynamically adjusting the pulling speed are as follows: Establish the curve showing the relationship between the liquid level in the tundish and the pulling speed; Set the liquid level fluctuation alarm threshold to ±5mm; The pulling speed is adjusted in real time using a PID control algorithm; The adjustment frequency should be no less than 10 times per minute.

9. The method for preventing steel leakage from a sliding plate according to claim 1, characterized in that, It also includes post-accident handling procedures: Immediately after pouring, close the ladle sliding gate; Forced cooling of the skateboard mechanism; After disassembling the skateboard, check and record the condition of the clamping steel.

10. A method for preventing steel leakage from a sliding plate according to claim 1, characterized in that, It also includes steel seepage risk warning steps: Establish a database of skateboard operating status and record historical abnormal event parameters; Analyze the similarity between current operating parameters and historical anomaly data using machine learning algorithms; An early warning signal is issued when the similarity exceeds a threshold.

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