Method and device for identifying slagging and vibration starting time of continuous casting and computer equipment

Abstract

This invention discloses a method, apparatus, and computer equipment for identifying the timing of slag addition and vibration start-up in continuous casting. The method includes: when the relevant parameters of the continuous casting production process conditions meet the preset conditions, calculating the theoretical weight Wm1 of the molten steel in the crystallizer when it reaches the upper edge of the side hole of the submerged entry nozzle and the theoretical weight Wm0 of the molten steel in the crystallizer when it reaches the vibration start-up height; calculating the emergence time t1; when Wt≥Wt0-0.5, assigning the value of Wt to ​​Wt1 and the value of W1 to Wl1; calculating Wt+W1 in real time and collecting the timing value T of the counter; when (Wt1+Wl1)-(Wt+Wl)≥Wm1 and T≥t2, outputting the command to add protective slag for casting; when (Wt1+Wl1)-(Wt+Wl)≥Wm0 and T≥t1, outputting the command to start vibration. This invention can accurately identify the timing of slag addition and vibration start-up in continuous casting and give corresponding instructions, solving the production abnormalities or accidents caused by inaccurate identification of slag addition and vibration start-up timing by relying on manual methods and liquid level signals.

Description

Technical Field

[0001] This application relates to the field of continuous casting start-up technology, and in particular to a method, apparatus and computer equipment for identifying the timing of slag addition and vibration start-up in continuous casting. Background Technology

[0002] Adding slag at the start of continuous casting refers to adding protective slag into the mold when the molten steel level just exceeds the upper edge of the side hole of the SEN (submerged entry nozzle) during the continuous casting process. The timing of adding slag is crucial. Adding slag too early will cause a large amount of slag entrapment, which can lead to leaks during the start of casting. Adding slag too late will cause excessive oxidation of the molten steel and overcooling of the molten steel surface, which can lead to the formation of cold steel on the surface and even cause leaks during the start of casting.

[0003] Continuous casting start-up vibration refers to the process in which, during the continuous casting start-up process, the crystallizer vibration is started, the leveling machine is started, and the casting speed is increased after the molten steel level and emergence time in the crystallizer reach the process setting requirements. However, the timing of vibration start-up is also very important. If vibration is started too early, it will lead to molten steel leakage during the start-up process. If it is started too late, it may cause molten steel to stick together or even overflow, resulting in start-up failure.

[0004] As the world promotes smart manufacturing, unmanned automated steel casting technology is also being vigorously promoted. The number of on-site operators is gradually decreasing, with some periods even seeing no operators at all, and some hazardous positions remaining unattended. If precise start-up casting, slag addition, and vibration initiation operations are not performed, and operators cannot intervene in a timely manner, accidents can escalate due to delayed or improper handling. In severe cases, steel leakage or overflow accidents can occur, with losses ranging from 300,000 to 400,000 yuan per incident. This is a major factor hindering the realization of unmanned steel casting in continuous casting.

[0005] The current common practice is for the operator to observe the liquid level in the crystallizer on-site. If the liquid level exceeds the SEN side hole, the protective slag for pouring is immediately pushed in. When the emergence time reaches the process setting requirements, the crystallizer vibration is manually started and the straightening machine is started.

[0006] For example, Chinese patent document "CN 115415491A Automatic Method for Opening the Ladle in the Continuous Casting Process of Slab" discloses that after the molten steel level in the crystallizer exceeds the side hole of the submerged entry nozzle, protective slag is added for opening the pouring; when the molten steel level in the crystallizer is 135mm away from the top of the crystallizer, the casting machine start signal is triggered and the straightening machine is started.

[0007] In the technical solution provided by the patent document, the timing of adding protective slag during the casting process is determined by manual observation. Since the amount of smoke and dust in the crystallizer is relatively large and the surface of the molten steel in the crystallizer is violently turbulent during the casting process, it is difficult to accurately observe the surface of the molten steel in the crystallizer. At the same time, the operator needs to be close to the crystallizer area to observe the situation inside the crystallizer more clearly. If splashing occurs at this time, it will cause personal injury to the operator.

[0008] The current method of comprehensively judging the timing of slag addition and vibration start-up, based on manual observation and liquid level detection signals, can solve the problem to some extent, but it also has many drawbacks. Firstly, manual identification suffers from inconsistent standards due to individual differences, leading to varying determinations of timing and subsequent handling methods. This results in inaccurate timing identification, and many steel leakage accidents during the initial casting process are caused by errors in this step. Secondly, this area contains molten steel, presenting a harsh operating environment and significant safety hazards.

[0009] In addition, the technical solution provided in this patent document determines the timing of starting vibration and casting speed solely based on the liquid level in the crystallizer, neglecting another important process parameter requirement: the emergence time. If the emergence time does not meet the requirements, it can easily lead to insufficient solidification of the molten steel at the ingot rod head, causing a steel leakage accident during casting.

[0010] In response to the above situation, there is an urgent need to develop an accurate identification technology for the timing of slag addition and vibration initiation during continuous casting, based on changes in molten steel volume and the duration of the weld bead formation. The aim is to accurately identify the timing of slag addition and vibration initiation during unattended continuous casting operations and submit this information to the system for appropriate action. This solves the problem of accurately identifying the timing of slag addition and vibration initiation during unattended continuous casting operations, avoiding the potential risks of casting failure or escalation of accidents due to incorrect judgment. Summary of the Invention

[0011] Based on this, and in response to the aforementioned technical problems, a method, apparatus, and computer equipment for identifying the timing of slag addition and vibration initiation in continuous casting are provided. This addresses the technical issues that in the prior art, the timing of slag addition and vibration initiation is determined solely by manual observation combined with the liquid level in the crystallizer, which poses safety hazards and results in inaccurate timing identification.

[0012] To achieve the above objectives, this application provides the following technical solution:

[0013] Firstly, a method for identifying the timing of slag addition and vibration initiation in continuous casting includes:

[0014] S1, obtain relevant parameters of the continuous casting production process conditions, and determine whether the relevant parameters meet the corresponding preset conditions;

[0015] S2, when all the relevant parameters meet the corresponding preset conditions, calculate the theoretical weight Wm1 of the molten steel in the crystallizer when it reaches the upper edge of the side hole of the submerged nozzle, and calculate the theoretical weight Wm0 of the molten steel in the crystallizer when it reaches the vibration start height.

[0016] S3, calculate the emergence time t1;

[0017] S4, collect the weight of molten steel in the tundish Wt and the weight of molten steel in the ladle Wl in real time according to the preset collection cycle. When Wt≥Wt0-0.5, assign the value of Wt to ​​Wt1 and the value of W1 to Wl1; where Wt0 is the standard weight of molten steel for pouring in the tundish.

[0018] S5, when the automatic pouring signal is received and the tundish stopper is opened, set a timer and start timing;

[0019] S6 calculates the weight change of Wt+W1 in real time and collects the timing value T of the counter.

[0020] S7, when (Wt1+Wl1)-(Wt+Wl)≥Wm1 and T≥t2, output the command to add protective slag; where t2 is the time from the steel liquid surface to the upper edge of the submerged nozzle side hole;

[0021] S8, when (Wt1+Wl1)-(Wt+Wl)≥Wm0 and T≥t1, output the oscillation start command.

[0022] Optionally, the relevant parameters of the continuous casting production process conditions include the working mode of the casting machine, the liquid level control mode in the crystallizer, the control mode of the tundish stopper rod, the state of the tundish stopper rod, the state of the ladle slide plate, the state of the ladle weighing system, and the state of the tundish weighing system.

[0023] Further optionally, determining whether all the relevant parameters meet the corresponding preset conditions includes:

[0024] Determine whether the casting machine is in pouring mode;

[0025] Determine whether the liquid level control mode in the crystallizer is fully automatic;

[0026] Determine whether the control mode of the middle-wall stopper rod is automatic pouring mode;

[0027] Determine whether the stopper rod in the middle package is in an unopened state;

[0028] Determine if the large skateboard is in the open state;

[0029] Determine whether the bulk bag weighing system is in a normal state;

[0030] Determine whether the weighing system for the intermediate package is in a normal state.

[0031] Optionally, step S2 includes:

[0032] Obtain the following parameters: billet width Wn, crystallizer taper a, crystallizer inner cavity thickness H0, crystallizer copper plate height H, crystallizer meniscus height H1 during normal pouring, molten steel level height H2 during vibration start-up, ingot rod head distance H3 from top of crystallizer copper plate, and submerged entry nozzle side hole upper edge distance H4 from top of crystallizer copper plate.

[0033] The formula for calculating the theoretical weight Wm1 of the molten steel in the crystallizer when it reaches the upper edge of the side hole of the submerged entry nozzle is as follows:

[0034]

[0035] Among them, S1 上 S1 is the cross-sectional area of ​​the crystallizer located at the upper edge of the side hole of the immersion nozzle. 上 =Wn×q×H0 / [1-a×(H-H4)], S 下 S is the cross-sectional area of ​​the crystallizer at the tip of the ingot rod. 下 =Wn×q×H0 / [1-a×(H-H3)]; q is the slab width shrinkage coefficient; ρ is the density of molten steel in the crystallizer;

[0036] The formula for calculating the theoretical weight Wm0 of the molten steel in the crystallizer when it reaches the starting vibration height is:

[0037]

[0038] Among them, S2 上 S2 is the cross-sectional area of ​​the crystallizer at the oscillation start position. 上 =Wn×q×H0 / [1-a×)H-H2)]; S 下 S is the cross-sectional area of ​​the crystallizer at the tip of the ingot rod. 下 =Wn×q×H0 / [1-a×(H-H3)]; q is the slab width shrinkage coefficient, which is 1.013; ρ is the density of molten steel in the crystallizer.

[0039] Alternatively, the formula for calculating the taper 'a' of the crystallizer is:

[0040]

[0041] Where W1 is the width of the upper opening of the crystallizer; W2 is the width of the lower opening of the crystallizer; and H is the height of the copper plate of the crystallizer.

[0042] Further, optionally, step S3 includes:

[0043] Collect the measured superheat ΔT and standard superheat ΔT0 of the molten steel in the ladle;

[0044] The formula for calculating the emergence time t1 is:

[0045]

[0046] Where t0 is the preset safety value, which ranges from 5 to 20 seconds; Wn is the width of the billet; and k is the preset safety factor, which ranges from 1 to 2.

[0047] Optionally, the preset acquisition period is 1-3 seconds.

[0048] Secondly, a device for identifying the timing of slag addition and vibration start-up in continuous casting includes:

[0049] The parameter acquisition module is used to acquire relevant parameters of the continuous casting production process conditions and determine whether the relevant parameters meet the corresponding preset conditions.

[0050] The theoretical weight calculation module for molten steel is used to calculate the theoretical weight Wm1 of the molten steel in the crystallizer when it reaches the upper edge of the side hole of the submerged nozzle, and to calculate the theoretical weight Wm0 of the molten steel in the crystallizer when it reaches the vibration start-up height, provided that all the relevant parameters meet the corresponding preset conditions.

[0051] The seedling emergence time calculation module is used to calculate the seedling emergence time t1;

[0052] The assignment module is used to collect the weight of molten steel in the tundish (Wt) and the weight of molten steel in the ladle (Wl) in real time at a preset collection period. When Wt ≥ Wt0 - 0.5, the value of Wt is assigned to Wt1, and the value of W1 is assigned to Wl1; where Wt0 is the standard weight of molten steel for pouring in the tundish.

[0053] The automatic pouring start signal acquisition module is used to set a timer and start timing when an automatic pouring start signal is acquired and the stopper rod of the tundish is opened;

[0054] The weight change calculation module is used to calculate the weight change of Wt+W1 in real time and collect the timing value T of the counter.

[0055] The slag addition command output module is used to output a command to add protective slag when (Wt1+Wl1)-(Wt+Wl)≥Wm1 and T≥t2; where t2 is the time from the steel liquid level to the upper edge of the submerged nozzle side hole.

[0056] The oscillation start command output module is used to output an oscillation start command when (Wt1+Wl1)-(Wt+Wl)≥Wm0 and T≥t1.

[0057] Thirdly, a computer device includes a memory and a processor, the memory storing a computer program, the processor executing the computer program to implement the steps of the method described in any one of the first aspects.

[0058] Fourthly, a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method described in any one of the first aspects:

[0059] The present invention has at least the following beneficial effects:

[0060] This invention provides an accurate method for identifying the timing of slag addition and vibration initiation in continuous casting based on changes in molten steel volume and emergence time. Based on the existing shape of the crystallizer cavity, the relative relationships of various facilities, and process operation requirements, the method comprehensively judges the timing of slag addition and vibration initiation in continuous casting by considering changes in molten steel volume and emergence time. When the set conditions are met, corresponding operation commands are automatically issued. This solves the problem of accurately identifying the timing of slag addition and vibration initiation in continuous casting when there is no one on duty, and issuing corresponding commands so that other systems in the continuous casting process can perform the corresponding operations in a timely manner. It also solves the problem of production anomalies or accidents caused by inaccurate identification of the timing of slag addition and vibration initiation based on manual labor and liquid level signals, including major production accidents such as steel leakage and overflow during casting. It also keeps operators away from the dangerous areas of the crystallizer casting process, avoiding potential safety hazards. Considering the complexity of production conditions, the set conditions include emergence time to ensure that the emergence time meets the actual production conditions and avoids accidents such as casting failure due to insufficient cooling and solidification. Attached Figure Description

[0061] Figure 1 This is a schematic diagram showing the relative relationships of various facilities within a crystallizer in one embodiment of the present invention;

[0062] Figure 2 This is a flowchart illustrating a method for identifying the timing of slag addition and vibration start-up in continuous casting, as provided in one embodiment of the present invention.

[0063] Figure 3 The following is a logic control diagram of a continuous casting slag addition and vibration start timing identification method provided in one embodiment of the present invention;

[0064] Figure 4 This is a block diagram of the module architecture of a continuous casting slag addition and vibration start-up timing identification device provided in one embodiment of the present invention;

[0065] Figure 5 This is an internal structural diagram of a computer device provided in one embodiment of the present invention. Detailed Implementation

[0066] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0067] To address the problems existing in the background technology, there is an urgent need to develop an accurate identification technology for the timing of slag addition and vibration initiation during continuous casting, based on changes in molten steel volume and the duration of emergence. The aim is to accurately identify the timing of slag addition and vibration initiation during unattended continuous casting operations and submit the information to the system for corresponding actions. This solves the problem of accurately identifying the timing of slag addition and vibration initiation during unattended continuous casting operations, avoiding the potential risks of casting failure or escalation of casting accidents due to incorrect judgment.

[0068] The method for accurately identifying the timing of slag addition and vibration initiation in continuous casting based on changes in molten steel volume and emergence time, as described in this invention, is divided into a slag addition and vibration initiation stage. First, the timing of slag addition during continuous casting is automatically identified, followed by the timing of vibration initiation.

[0069] The relationships between the molten steel level in the crystallizer, the top surface of the copper plate in crystallizer 2, the submerged entry nozzle 1, and the dummy bar head 3, as well as the shape of the inner cavity of crystallizer 2, during the initial casting process of slab continuous casting can be referenced. Figure 1 As shown in the diagram. H1 refers to the height of the inner meniscus of crystallizer 2 from the top of the copper plate during normal casting; this dimension is generally 80-100mm. H2 indicates the height of the molten steel level in crystallizer 2 from the top of the copper plate during oscillation startup; the standard height is 110-150mm, and the optimized height is 120-140mm. H3 refers to the height of the dummy bar head 3 from the top of the copper plate before casting begins; the value range is 400-600mm, and the optimized range is 450-550mm. H4 indicates the height of the upper edge of the side hole of the immersion nozzle 1 from the top of the copper plate of crystallizer 2; the standard height is 200-240mm, and the optimized height is 210-230mm. Currently, the crystallizer liquid level detection height range is 0-200mm, and the selectable range to meet accuracy requirements is 0-180mm, which cannot detect the liquid level height in the area of ​​the side hole of the nozzle.

[0070] In one embodiment, such as Figure 2 As shown, a method for identifying the timing of slag addition and vibration initiation in continuous casting is provided, including the following steps:

[0071] Step 1, collecting and monitoring continuous casting production process conditions, including step S1:

[0072] S1, obtain the relevant parameters of the continuous casting production process conditions, and determine whether the relevant parameters meet the corresponding preset conditions.

[0073] Among them, the relevant parameters of the continuous casting production process include the working mode of the casting machine, the liquid level control mode in the crystallizer, the control mode of the tundish stopper rod, the status of the tundish stopper rod, the status of the ladle slide plate, the status of the ladle weighing system, and the status of the tundish weighing system.

[0074] Determining whether all relevant parameters meet the corresponding preset conditions includes:

[0075] Determine whether the casting machine is in pouring mode;

[0076] Determine whether the liquid level control mode in the crystallizer is fully automatic;

[0077] Determine whether the control mode of the middle-wall stopper rod is automatic pouring mode;

[0078] Determine whether the stopper rod in the middle package is in an unopened state;

[0079] Determine if the large skateboard is in the open state;

[0080] Determine whether the bulk bag weighing system is in a normal state;

[0081] Determine whether the weighing system for the intermediate package is in a normal state.

[0082] In other words, the data collected in step one related to the production process conditions includes collecting data on the casting machine's operating mode, the liquid level control mode in the crystallizer, the automatic pouring mode and stopper rod opening status in the tundish, the ladle slide opening status, and the status of the ladle and tundish weighing systems.

[0083] When the collected data shows that the casting machine's operating mode is "pouring," the liquid level control mode in the crystallizer is "fully automatic," the stopper control is in automatic pouring mode and the stopper is not open, the ladle slide is open, and the ladle and tundish weighing systems are functioning normally, proceed to step two. Otherwise, continue collecting and automatically monitoring the casting machine's production status.

[0084] Step 2, continuous casting production process data processing, including steps S2-S4.

[0085] S2, when all relevant parameters meet the corresponding preset conditions, calculate the theoretical weight Wm1 of the molten steel in the crystallizer when it reaches the upper edge of the side hole of the submerged nozzle, and calculate the theoretical weight Wm0 of the molten steel in the crystallizer when it reaches the vibration start height.

[0086] Further, step S2 includes:

[0087] Obtain the following parameters: billet width Wn, crystallizer taper a, crystallizer inner cavity thickness H0, crystallizer copper plate height H, crystallizer meniscus height H1 during normal pouring, molten steel level height H2 during vibration start-up, ingot rod head distance H3 from top of crystallizer copper plate, and submerged entry nozzle side hole upper edge distance H4 from top of crystallizer copper plate.

[0088] The formula for calculating the theoretical weight Wm1 of the molten steel in the crystallizer when it reaches the upper edge of the side hole of the submerged entry nozzle is as follows:

[0089]

[0090] Among them, S1 上 S1 is the cross-sectional area of ​​the crystallizer located at the upper edge of the side hole of the immersion nozzle. 上 =Wn×q×H0 / [1-a×(H-H4)], S 下 S is the cross-sectional area of ​​the crystallizer at the tip of the ingot rod. 下 =Wn×q×H0 / [1-a×(H-H3)]; q is the slab width shrinkage coefficient; ρ is the density of molten steel in the crystallizer;

[0091] The formula for calculating the theoretical weight Wm0 of the molten steel in the crystallizer when it reaches the starting vibration height is:

[0092]

[0093] Among them, S2 上 S2 is the cross-sectional area of ​​the crystallizer at the oscillation start position. 上 =Wn×q×H0 / [1-a×(H-H2)]; S 下 S is the cross-sectional area of ​​the crystallizer at the tip of the ingot rod. 下 =Wn×q×H0 / [1-a×(H-H3)]; q is the slab width shrinkage coefficient, which is 1.013; ρ is the density of molten steel in the crystallizer.

[0094] The formula for calculating the taper 'a' of the crystallizer is:

[0095]

[0096] Where W1 is the width of the upper opening of the crystallizer; W2 is the width of the lower opening of the crystallizer; and H is the height of the copper plate of the crystallizer.

[0097] In other words, collect the width Wn of the billet, the taper a of the crystallizer 2, the inner cavity thickness H0 of the crystallizer 2, the copper plate height H of the crystallizer 2, the meniscus height H1 of the crystallizer 2 during normal pouring, the molten steel level height H2 during normal start-up pouring, the distance H3 between the dummy bar head 3 and the top surface of the copper plate of the crystallizer 2, and the distance H4 between the upper edge of the side hole of the SEN nozzle 1 and the top surface of the copper plate of the crystallizer 2. Calculate the theoretical weight Wm1 of the molten steel in the crystallizer 2 up to the upper edge H4 of the side hole of the SEN nozzle 1; calculate the theoretical weight Wm0 of the molten steel in the crystallizer 2 up to the normal start-up pouring height (the molten steel level height during vibration start-up) H2.

[0098] There are various ways to express the crystallizer taper a (% / m). The crystallizer taper calculation formula of this invention is as follows:

[0099] a=(W1-W2) / (W1×H), % / m.

[0100] Where: W1 is the width of the top opening of the crystallizer, in meters;

[0101] W2 is the width of the bottom opening of the crystallizer, in meters (m).

[0102] H is the height of the copper plate, in meters (m).

[0103] The taper of a typical slab crystallizer is 0.6-1.4% / m, with an optimized range of 0.8-1.2% / m.

[0104] Wm1 refers to the theoretical weight of the molten steel in the crystallizer when the molten steel level just reaches the upper edge of the SEN side hole. The volume shape of the molten steel in the crystallizer is a frustum. The formula for calculating Wm1 is as follows:

[0105] Wm1=(H3-H4)×ρ / 3×[S1 上 +S 下 +√(S1 上 ×S 下 )]

[0106] Wherein: S 下 The cross-sectional area of ​​the crystallizer at the tip of the ingot rod is 1.013;

[0107] S 下 =Wn×1.013×H0 / [1-a×(H-H3)];

[0108] S1 上 The cross-sectional area of ​​the crystallizer located at the upper edge of the side hole of the immersion-type water inlet;

[0109] S1 上 =Wn×1.013×H0 / [1-a×(H-H4)];

[0110] ρ is the density of the molten steel in the crystallizer, and it is a measured value.

[0111] Wm0 refers to the theoretical weight of the molten steel in the crystallizer when the molten steel level just reaches the starting height. The volume of the molten steel in the crystallizer is shaped like a frustum. The formula for calculating Wm0 is as follows:

[0112] Wm0=(H3-H2)×ρ / 3×[S2 上 +S 下 +√(S2 上 ×S 下 )]

[0113] Wherein: S 下 This refers to the cross-sectional area of ​​the crystallizer at the tip of the ingot rod.

[0114] S2 上 The cross-sectional area of ​​the crystallizer at the oscillation start position

[0115] S2 上 =Wn×1.013×H0 / [1-a×(H-H2)].

[0116] S3, calculate the emergence time t1.

[0117] Further, step S3 includes:

[0118] Collect the measured superheat ΔT and standard superheat ΔT0 of the molten steel in the ladle;

[0119] The formula for calculating the emergence time t1 is:

[0120]

[0121] Where t0 is the preset safety value, which ranges from 5 to 20 seconds; Wn is the width of the billet; and k is the preset safety factor, which ranges from 1 to 2.

[0122] In other words, the measured superheat ΔT and standard superheat ΔT0 of the molten steel in the ladle are collected; t0 is set as a safety value, generally 5-20s; k is set as a safety factor, with a value range of 1-2; and the emergence time t1 is set. The emergence time calculation comprehensively considers the slab width and the superheat of the molten steel, and is calculated as follows:

[0123] t1=t0+Wn / 100×4+(ΔT-ΔT0)×k, s.

[0124] S4, collect the weight of molten steel in the tundish Wt and the weight of molten steel in the ladle Wl in real time according to the preset collection cycle. When Wt≥Wt0-0.5, assign the value of Wt to ​​Wt1 and the value of W1 to Wl1; where Wt0 is the standard weight of molten steel for pouring in the tundish.

[0125] The preset acquisition cycle is 1-3 seconds.

[0126] In other words, the weights of molten steel in the tundish (Wt) and ladle (Wl) are collected, with a collection period of Δt1 and a collection period of 1-3 seconds. The standard weight of molten steel for the first pour in the tundish is set as Wt0. When Wt ≥ Wt0 - 0.5, Wt1 = Wt and Wl1 = Wl.

[0127] Step 3: Activate the pouring and protective slag application process.

[0128] S5: When an automatic pouring signal is received and the stopper rod of the tundish is opened, a timer is set and the timer starts.

[0129] S6 calculates the weight change of Wt+W1 in real time and collects the timing value T of the counter.

[0130] S7, when (Wt1+Wl1)-(Wt+Wl)≥Wm1 and T≥t2, output the command to add protective slag; where t2 is the time from the steel liquid surface to the upper edge of the submerged nozzle side hole.

[0131] In other words, the automatic pouring signal is collected, and when the stopper is opened and the automatic pouring is activated, the process proceeds to step three.

[0132] Step three includes:

[0133] (1) Set T as the timer and start timing. During the period from the start of vibration, temperature measurement and adding of the intermediate pack covering agent are prohibited to avoid affecting the accuracy of the weighing system.

[0134] (2) Collect the weight of molten steel Wt in the ladle and the weight of molten steel Wl in the main ladle. The collection period is Δt1 and the collection period is 1-3s. Calculate the weight change of Wt+Wl in real time.

[0135] (3) When (Wt1+Wl1)-(Wt+Wl)≥Wm1 and T≥t2, give the instruction to add protective slag and proceed to step four.

[0136] Step 4, Activation:

[0137] S8, when (Wt1+Wl1)-(Wt+Wl)≥Wm0 and T≥t1, output the oscillation start command.

[0138] In other words, step four includes:

[0139] (1) Collect the weight of molten steel Wt in the ladle and the weight of molten steel Wl in the main ladle. The collection period is Δt1 and the collection period is 1-3s. Calculate the weight change of Wt+Wl in real time.

[0140] (2) When (Wt1+Wl1)-(Wt+Wl)≥Wm0 and T≥t1, an oscillation start command is given and the casting flow start program is started.

[0141] (3) The automatic slag addition and vibration start operation automatic identification program ends.

[0142] The method will be described in further detail below through specific embodiments:

[0143] I. Relevant Production Process Conditions for Continuous Casting

[0144] 1. In this example, the continuous casting machine has five working modes: "maintenance", "preparation", "holding", "pouring", and "tail billet". Among them, the "pouring" mode is the normal working mode.

[0145] 2. The crystallizer liquid level height control mode has three control modes: "fully automatic", "semi-automatic" and "manual", among which "fully automatic" mode is the normal control mode;

[0146] 3. The stopper rod opening control has two control modes: "automatic" and "manual". The "automatic" mode is the normal control mode and is not activated.

[0147] 4. The weighing systems for the large and medium ladles are functioning normally, and the initial pouring weight of the medium ladle is Wt0 = 25t;

[0148] 5. The slab width was measured to be Wn = 1350 mm, and the crystallizer taper a = 1.1% / m;

[0149] 6. The steel grade obtained for production is Q235B, with a liquidus temperature of 1518℃ and a standard superheat ΔT0 = 25℃;

[0150] 7. Set the crystallizer inner cavity thickness H0 = 223mm, the crystallizer copper plate length H = 900mm, the meniscus height H1 = 80mm, the oscillation liquid level height H2 = 125mm, the height of the ingot head from the top of the copper plate H3 = 500mm, and the additional casting protective slag liquid level H4 = 210m.

[0151] II. Collection and Monitoring Stage of Continuous Casting Production Process Conditions

[0152] 1. Collect the continuous casting machine's operating mode parameters to confirm that it is actually in "pouring" mode;

[0153] 2. Collect the liquid level control mode in the crystallizer and confirm that it is actually in "fully automatic" control mode;

[0154] 3. The stopper rod opening control mode is set to "automatic" and the stopper rod is not in the open state;

[0155] 4. Data shows that the large-bag skateboard mechanism has been activated;

[0156] 5. The weighing systems for medium and large packages were found to be operating normally.

[0157] 6. The first manual temperature measurement result of continuous casting was collected, and the superheat was ΔT;

[0158] 7. If all the above conditions are met, proceed to the second stage of continuous casting production process data processing.

[0159] III. Continuous Casting Production Process Data Processing Stage

[0160] 1. Calculate the theoretical weight Wm1 of molten steel in the crystallizer up to the upper edge H4 of the SEN side hole, assuming the width shrinkage coefficient of the billet is 1.103.

[0161] Wm1=(H3-H4) / 3×(S1 上 +S 下 +√[S1 上 ×S 下 ])×ρ

[0162] Wherein: S 下 This represents the area at the bottom of the crystallizer;

[0163] S 下 =Wn×1.013×H0 / [1-a / 100×(H-H3)]=1.350×1.013×0.223 / [1-1.1 / 100×

[0164] [(0.9-0.5)]=0.3063m 3 ;

[0165] S1 上 The cross-sectional area of ​​the crystallizer located at the upper edge of the side hole of the immersion-type water inlet;

[0166] S1 上 =Wn×1.013×H0 / [1-a / 100×(H-H4)]=1.350×1.013×0.223 / [1-1.1 / 100

[0167] [×(0.9-0.21)]=0.3073m 3 ;

[0168] ρ is the density of the molten steel in the crystallizer, a measured value, taken as 7402 kg / m³. 3 .

[0169] Density ρ is the ratio of weight to volume. The volume of molten steel in the crystallizer is a frustum, which can be calculated based on known dimensions. The weight of the molten steel is equivalent to the reduction in weight between the ladle and the tundish. The statistical results of density ρ are shown in Table 1. Based on the statistically calculated density ρ and volume of the molten steel, the weight Wm1 of the molten steel can be calculated.

[0170] Wm1=(0.5-0.21) / 3×[0.3063+0.3073+√[(0.3063×0.3073)]×7402=658.6kg

[0171]

[0172] 2. Calculate the theoretical weight of molten steel Wm0 when the molten steel in the crystallizer reaches the normal pouring height H2. Wm0 = (H3 - H2) × ρ / 3 × [S2] 上 +S 下 +√(S2 上 ×S 下 )]

[0173] Wherein: S 下 This refers to the cross-sectional area of ​​the crystallizer at the tip of the ingot rod.

[0174] S2 上 The cross-sectional area of ​​the crystallizer at the oscillation initiation position;

[0175] S2 上 =Wn×1.013×H0 / [1-a×(H-H2)];

[0176] S2 上 =Wn×1.013×H0 / [1-a / 100×(H-H2)]=1.350×1.013×0.223 / [1-1.1 / 100

[0177] [×(0.9-0.125)]=0.3076m 3 ;

[0178] Wm0=(0.5-0.125) / 3×[0.3063+0.3076+√(0.3063×0.3076)]×7402=852kg.

[0179] 3. The manual temperature measurement of the ladle is 1552℃. The actual superheat of the molten steel is ΔT = 1552 - 1518 = 34℃. Set the safety value t0 to 10s, the safety factor k to 1.2, and t1 and k to empirical values. Calculate the emergence time t1.

[0180] t1=t0+Wn / 100×4+(ΔT-ΔT0)×k=10+1350 / 100×4+(34-25)×1.2=74.8s

[0181] 4. Collect the weight of molten steel in the ladle (Wt) and the weight of the ladle (Wl). The collection period is Δt1 = 1s. In actual production, when Wt = 24.55 ≥ Wt0 - 0.5 = 25 - 0.5 = 24.5t, set Wt1 = Wt = 24.55t and Wl1 = Wl = 90.91t.

[0182] 5. When Wt = 25t, the automatic pouring activation of the tundish is detected, and the stopper rod opens. At this time, temperature measurement and tundish covering agent addition are prohibited to avoid affecting the accuracy of weighing. Then, the process will proceed to the third stage of pouring activation and protective slag addition.

[0183] IV. Activation Stage of Adding Protective Slag During Casting

[0184] 1. Set T as a timer and start timing.

[0185] 2. Collect the weights of molten steel in the ladle (Wt) and the ladle (Wl) with a collection period of Δt1 = 1s, and calculate the weight change of Wt + Wl; simultaneously, collect the value of the timer T.

[0186] 3. Set t2 as the time from the molten steel surface to the upper edge of the nozzle side hole. t2 is a statistically calculated value. The specific calculation is shown in Table 2.

[0187] 4. In this example, the slab width Wn = 1350mm. Therefore, t2 is the average of the times taken for slab widths of 1300mm and 1400mm, i.e., t2 = (44 + 50) / 2 = 47s. In this example, when T = 50s ≥ t2 = 47s, (Wt1 + Wl1) - (Wt + Wl) = [(24.55 + 90.91) - (26.36 + 88.43)] × 1000 = 670kg ≥ Wm1 = 658.6kg, satisfying the condition (Wt1 + Wl1) - (Wt + Wl) ≥ Wm1 and T >= t2. In reality, when T = 47s, the molten steel level has not yet reached the upper edge of the nozzle; when T = 50s, the molten steel level exceeds the upper edge of the nozzle. At this time, the continuous casting voice system issues a command to add protective slag and enters the fourth stage of vibration activation.

[0188]

[0189] V. Activation and Initiation Phase

[0190] 1. Continue to collect the weight of molten steel Wt in the ladle and the weight of molten steel Wl in the main ladle, with a collection period of Δt1 = 1s, and calculate the weight change of Wt + Wl; at the same time, collect the value of timer T.

[0191] 2. In this example, when T = 75s ≥ t1 = 74.8s, (Wt1 + Wl1) - (Wt + Wl) = [(24.55 + 90.91) - (27.68 + 86.91)] × 1000 = 870kg ≥ Wm0 = 852kg, satisfying the condition (Wt1 + Wl1) - (Wt + Wl) ≥ Wm0 and T ≥ t1. In reality, when the molten steel level reaches H2 = 125mm, T = 70s, but the requirement of T ≥ t1 = 74.5s is not met; when T = 75s, the molten steel level in the crystallizer is H2 = 120mm, simultaneously satisfying the condition (Wt1 + Wl1) - (Wt + Wl) ≥ Wm0 and T ≥ t1. At this time, the continuous casting voice system issues a command to start casting in the crystallizer, activating the crystallizer vibration system and the straightening machine system.

[0192] 3. The automatic identification program for adding protective slag and starting vibration operation ends.

[0193] As the world promotes smart manufacturing, automated continuous casting is also being vigorously implemented. The number of on-site operators is gradually decreasing, and there are even periods when no operators are present at the production site. However, if the start of casting, slag addition, and vibration initiation are not timely, and operators fail to detect the problem promptly, the delay in handling the situation can lead to the escalation of accidents. This is a major factor hindering the realization of fully automated continuous casting.

[0194] In response to the above situation, there is an urgent need to develop an accurate identification technology for the timing of slag addition and vibration initiation in continuous casting based on changes in molten steel volume and emergence time. The aim is to automatically identify the timing of slag addition and vibration initiation and issue corresponding operational commands when the continuous casting site is unattended. This solves the problem of accurately identifying the timing of slag addition and vibration initiation in continuous casting and issuing corresponding commands when the continuous casting site is unattended, allowing other systems in the continuous casting process to perform the appropriate operations in a timely manner. Based on the automation control technology of continuous casting production processes and combined with on-site operational experience, the following concept is proposed: Based on the existing shape of the crystallizer cavity, the relative relationships of various facilities, and process operation requirements, a combination of changes in molten steel volume and emergence time is used to accurately identify the timing of slag addition and vibration initiation in continuous casting and issue corresponding commands.

[0195] The continuous casting start-up slag addition and vibration start-up timing identification method provided in this embodiment of the invention includes four main parts: the first stage of continuous casting production process condition collection and monitoring, the second stage of continuous casting production process data processing, the third stage of start-up slag addition activation, and the fourth stage of vibration start-up activation. The logic control diagram of the method provided in this embodiment of the invention is shown below. Figure 3 As shown.

[0196] This invention addresses the problems existing in the prior art by proposing an accurate identification method for the timing of slag addition and vibration initiation during continuous casting based on changes in molten steel volume and the duration of crystallization. This technical solution addresses a series of problems arising from the current practice of relying on manual judgment of slag addition timing and vibration initiation solely based on liquid level height during continuous casting. It achieves precise identification of the timing of slag addition and vibration initiation during continuous casting. This solves the production anomalies or accidents caused by inaccurate identification of slag addition and vibration initiation timing based on manual methods and liquid level signals, including major production accidents such as molten steel leakage and overflow during casting. It also keeps operators away from the dangerous areas of the crystallizer, avoiding potential safety hazards.

[0197] This invention uses changes in molten steel volume and emergence time to accurately determine the timing of continuous casting start-up, slag addition, and vibration initiation. When the set conditions are met, the corresponding operation command is automatically issued, avoiding production accidents caused by the system relying on only one factor or by delayed or incorrect manual response, or even major accidents such as steel leakage or overflow.

[0198] The calculation of the molten steel weight in the crystallizer takes into account different taper angles. The molten steel density is a calculated value based on actual statistics. The molten steel weight can be automatically calculated and is accurate and reliable.

[0199] Considering the complexity of production conditions, the emergence time not only has a safe value, but also fully takes into account the steel grade and actual superheat, ensuring that the emergence time meets the actual production conditions and avoiding accidents such as insufficient cooling and solidification leading to casting failure.

[0200] Compared with existing technologies, this invention plays a significant role in promoting unmanned automated steel casting technology in continuous casting. After implementation, the timing of adding protective slag and initiating vibration in continuous casting is automatically and accurately identified. The number of on-site operators is gradually decreasing, and in some instances where no operators are present at the production site, the number of major production accidents caused by improper timing of slag addition and vibration initiation is greatly reduced. Simultaneously, the success rate of continuous casting and the overall production efficiency of continuous casting are improved.

[0201] It should be understood that, although Figure 2-3 The steps in the flowchart are shown sequentially as indicated by the arrows, but these steps are not necessarily executed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order in which these steps are executed, and they can be performed in other orders. Figure 2-3 At least some of the steps in the process may include multiple steps or multiple stages. These steps or stages are not necessarily completed at the same time, but may be executed at different times. The execution order of these steps or stages is not necessarily sequential, but may be executed in turn or alternately with other steps or at least some of the steps or stages in other steps.

[0202] In one embodiment, such as Figure 4 As shown, a device for identifying the timing of slag addition and vibration start-up in continuous casting is provided, including the following program modules.

[0203] The parameter acquisition module 401 is used to acquire relevant parameters of the continuous casting production process conditions and determine whether the relevant parameters meet the corresponding preset conditions.

[0204] The molten steel theoretical weight calculation module 402 is used to calculate the theoretical weight Wm1 of the molten steel in the crystallizer when it reaches the upper edge of the side hole of the submerged nozzle, and to calculate the theoretical weight Wm0 of the molten steel in the crystallizer when it reaches the vibration start height, provided that all relevant parameters meet the corresponding preset conditions.

[0205] Emergence time calculation module 403 is used to calculate emergence time t1;

[0206] The assignment module 404 is used to collect the weight of molten steel in the tundish Wt and the weight of molten steel in the ladle Wl in real time at a preset collection period. When Wt≥Wt0-0.5, the value of Wt is assigned to Wt1 and the value of W1 is assigned to Wl1; where Wt0 is the standard weight of molten steel for pouring in the tundish.

[0207] The automatic pouring signal acquisition module 405 is used to set a timer and start timing when an automatic pouring signal is acquired and the stopper rod of the tundish is opened;

[0208] The weight change calculation module 406 is used to calculate the weight change of Wt+W1 in real time and collect the timing value T of the counter.

[0209] The slag addition command output module 407 is used to output a command to add protective slag when (Wt1+Wl1)-(Wt+Wl)≥Wm1 and T≥t2; where t2 is the time from the steel liquid level to the upper edge of the submerged nozzle side hole.

[0210] The oscillation start command output module 408 is used to output an oscillation start command when (Wt1+Wl1)-(Wt+Wl)≥Wm0 and T≥t1.

[0211] Specific limitations regarding the continuous casting slag addition and vibration start-up timing identification device can be found in the above-described limitations regarding the continuous casting slag addition and vibration start-up timing identification method, and will not be repeated here. Each module in the aforementioned continuous casting slag addition and vibration start-up timing identification device can be implemented entirely or partially through software, hardware, or a combination thereof. These modules can be embedded in or independent of the processor in a computer device, or stored in the computer device's memory as software, so that the processor can call and execute the corresponding operations of each module.

[0212] In one embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be as follows: Figure 5 As shown, the computer device includes a processor, memory, communication interface, display screen, and input device connected via a system bus. The processor provides computing and control capabilities. The memory includes a non-volatile storage medium and internal memory. The non-volatile storage medium stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage medium. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, carrier networks, NFC (Near Field Communication), or other technologies. When the computer program is executed by the processor, it implements the continuous casting slag addition and vibration timing identification method provided in the above embodiment. The display screen can be an LCD screen or an e-ink screen. The input device can be a touch layer covering the display screen, buttons, a trackball, or a touchpad on the computer device casing, or an external keyboard, touchpad, or mouse.

[0213] Those skilled in the art will understand that Figure 5 The structure shown is merely a block diagram of a portion of the structure related to the present application and does not constitute a limitation on the computer device to which the present application is applied. Specific computer devices may include more or fewer components than those shown in the figure, or combine certain components, or have different component arrangements.

[0214] In one embodiment, a computer device is provided, including a memory and a processor, wherein the memory stores a computer program relating to all or part of the processes in the methods of the above embodiments.

[0215] In one embodiment, a computer-readable storage medium is provided having a computer program stored thereon relating to all or part of the processes in the methods of the above embodiments.

[0216] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the methods described above. Any references to memory, storage, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, or optical storage, etc. Volatile memory can include random access memory (RAM) or external cache memory. By way of illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0217] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0218] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A method for identifying the timing of slag addition and vibration start-up in continuous casting, characterized in that, include: S1, obtain relevant parameters of the continuous casting production process conditions, and determine whether the relevant parameters meet the corresponding preset conditions; S2, when all the relevant parameters meet the corresponding preset conditions, calculate the theoretical weight Wm1 of the molten steel in the crystallizer when it reaches the upper edge of the submerged nozzle side hole, and calculate the theoretical weight Wm0 of the molten steel in the crystallizer when it reaches the vibration start-up height; step S2 specifically includes: Obtain the following parameters: billet width Wn, crystallizer taper a, crystallizer inner cavity thickness H0, crystallizer copper plate height H, crystallizer meniscus height H1 during normal pouring, molten steel level height H2 during vibration start-up, ingot rod head distance H3 from top of crystallizer copper plate, and submerged entry nozzle side hole upper edge distance H4 from top of crystallizer copper plate. The formula for calculating the theoretical weight Wm1 of the molten steel in the crystallizer when it reaches the upper edge of the side hole of the submerged entry nozzle is as follows: Among them, S1 上 S1 is the cross-sectional area of ​​the crystallizer located at the upper edge of the side hole of the immersion nozzle. 上 =Wn×q×H0 / [1-a×(H-H4)], S 下 S is the cross-sectional area of ​​the crystallizer at the tip of the ingot rod. 下 =Wn×q×H0 / [1-a×(H-H3)]; q is the slab width shrinkage coefficient; ρ is the density of molten steel in the crystallizer; The formula for calculating the theoretical weight Wm0 of the molten steel in the crystallizer when it reaches the starting vibration height is: Among them, S2 上 S2 is the cross-sectional area of ​​the crystallizer at the oscillation start position. 上 =Wn×q×H0 / [1-a×(H-H2)]; S 下 S is the cross-sectional area of ​​the crystallizer at the tip of the ingot rod. 下 =Wn×q×H0 / [1-a×(H-H3)]; q is the slab width shrinkage coefficient, which is 1.013; ρ is the density of molten steel in the crystallizer; S3, calculate the emergence time t1; S4, collect the weight of molten steel in the tundish Wt and the weight of molten steel in the ladle Wl in real time according to the preset collection cycle. When Wt≥Wt0-0.5, assign the value of Wt to ​​Wt1 and the value of W1 to Wl1; where Wt0 is the standard weight of molten steel for pouring in the tundish. S5, when the automatic pouring signal is received and the tundish stopper is opened, set a timer and start timing; S6 calculates the weight change of Wt+W1 in real time and collects the timing value T of the counter. S7, when (Wt1+Wl1)-(Wt+Wl)≥Wm1 and T≥t2, output the command to add protective slag; where t2 is the time from the steel liquid surface to the upper edge of the submerged nozzle side hole; S8, when (Wt1+Wl1)-(Wt+Wl)≥Wm0 and T≥t1, output the oscillation start command.

2. The method for identifying the timing of slag addition and vibration start-up in continuous casting according to claim 1, characterized in that, The relevant parameters of the continuous casting production process include the working mode of the casting machine, the liquid level control mode in the crystallizer, the control mode of the tundish stopper, the status of the tundish stopper, the status of the ladle slide plate, the status of the ladle weighing system, and the status of the tundish weighing system.

3. The method for identifying the timing of slag addition and vibration start-up in continuous casting according to claim 2, characterized in that, The step of determining whether the relevant parameters all meet the corresponding preset conditions includes: Determine whether the casting machine is in pouring mode; Determine whether the liquid level control mode in the crystallizer is fully automatic; Determine whether the control mode of the middle-wall stopper rod is automatic pouring mode; Determine whether the stopper rod in the middle package is in an unopened state; Determine if the large skateboard is in the open state; Determine whether the bulk bag weighing system is in a normal state; Determine whether the weighing system for the intermediate package is in a normal state.

4. The method for identifying the timing of slag addition and vibration start-up in continuous casting according to claim 1, characterized in that, The formula for calculating the taper 'a' of the crystallizer is: Where W1 is the width of the top opening of the crystallizer; W2 is the width of the bottom opening of the crystallizer; and H is the height of the copper plate of the crystallizer.

5. The method for identifying the timing of slag addition and vibration start-up in continuous casting according to claim 1, characterized in that, Step S3 includes: Collect the measured superheat ΔT and standard superheat ΔT0 of the molten steel in the ladle; The formula for calculating the emergence time t1 is: Where t0 is the preset safety value, which ranges from 5 to 20 seconds; Wn is the width of the billet; and k is the preset safety factor, which ranges from 1 to 2.

6. The method for identifying the timing of slag addition and vibration start-up in continuous casting according to claim 1, characterized in that, The preset acquisition period is 1-3 seconds.

7. A device for identifying the timing of slag addition and vibration start-up in continuous casting, characterized in that, include: The parameter acquisition module is used to acquire relevant parameters of the continuous casting production process conditions and determine whether the relevant parameters meet the corresponding preset conditions. The theoretical weight calculation module for molten steel is used to calculate the theoretical weight Wm1 of the molten steel in the crystallizer when it reaches the upper edge of the side hole of the submerged nozzle, and to calculate the theoretical weight Wm0 of the molten steel in the crystallizer when it reaches the vibration start-up height, provided that all the relevant parameters meet the corresponding preset conditions. Specifically, it includes obtaining the following parameters: the width Wn of the billet, the taper a of the crystallizer, the inner cavity thickness H0 of the crystallizer, the copper plate height H of the crystallizer, the meniscus height H1 of the crystallizer during normal pouring, the molten steel level height H2 during vibration start-up, the distance H3 between the dummy bar head and the top surface of the copper plate of the crystallizer, and the distance H4 between the upper edge of the side hole of the submerged nozzle and the top surface of the copper plate of the crystallizer. The formula for calculating the theoretical weight Wm1 of the molten steel in the crystallizer when it reaches the upper edge of the side hole of the submerged nozzle is as follows: Among them, S1 上 S1 is the cross-sectional area of ​​the crystallizer located at the upper edge of the side hole of the immersion nozzle. 上 =Wn×q×H0 / [1-a×(H-H4)], S 下 S is the cross-sectional area of ​​the crystallizer at the tip of the ingot rod. 下 =Wn×q×H0 / [1-a×(H-H3)]; q is the slab width reduction coefficient; ρ is the density of molten steel in the crystallizer; the formula for calculating the theoretical weight Wm0 of molten steel in the crystallizer when it reaches the starting vibration height is: Among them, S2 上 S2 is the cross-sectional area of ​​the crystallizer at the oscillation start position. 上 =Wn×q×H0 / [1-a×(H-H2)]; S 下 S is the cross-sectional area of ​​the crystallizer at the tip of the ingot rod. 下 =Wn×q×H0 / [1-a×(H-H3)]; q is the slab width shrinkage coefficient, which is 1.013; ρ is the density of molten steel in the crystallizer; The seedling emergence time calculation module is used to calculate the seedling emergence time t1; The assignment module is used to collect the weight of molten steel in the tundish (Wt) and the weight of molten steel in the ladle (Wl) in real time at a preset collection period. When Wt ≥ Wt0 - 0.5, the value of Wt is assigned to Wt1, and the value of W1 is assigned to Wl1; where Wt0 is the standard weight of molten steel for pouring in the tundish. The automatic pouring start signal acquisition module is used to set a timer and start timing when an automatic pouring start signal is acquired and the stopper rod of the tundish is opened; The weight change calculation module is used to calculate the weight change of Wt+W1 in real time and collect the timing value T of the counter. The slag addition command output module is used to output a command to add protective slag when (Wt1+Wl1)-(Wt+Wl)≥Wm1 and T≥t2; where t2 is the time from the steel liquid level to the upper edge of the submerged nozzle side hole. The oscillation start command output module is used to output an oscillation start command when (Wt1+Wl1)-(Wt+Wl)≥Wm0 and T≥t1.

8. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that, When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 6.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

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