Production control method, device and equipment for continuous casting production line

Abstract

The application discloses a production control method, device and equipment of a continuous casting production line, the continuous casting production line comprising a ladle and a tundish; the method comprises the following steps: monitoring the residual molten steel weight in the ladle when the ladle is casting; if the residual molten steel weight is reduced to a first preset weight, the liquid level of the tundish is controlled to be lifted to a first preset liquid level; if the residual molten steel weight is reduced to a second preset weight, the sliding nozzle opening degree of the ladle is reduced to a first preset opening degree, so that the molten steel flow rate of the ladle is reduced to below a first preset flow rate; the first preset flow rate is a critical flow rate at which the molten steel forms a vortex; the second preset weight is smaller than the first preset weight; when the residual molten steel weight is smaller than the second preset weight, the molten steel in the ladle has a risk of vortexing and rolling the steel slag into the tundish. The application solves the technical problem of excessive residual molten steel in the ladle.

Description

Technical Field

[0001] This invention belongs to the field of continuous casting production technology, and particularly relates to a production control method, device and equipment for a continuous casting production line. Background Technology

[0002] In continuous casting, towards the end of the casting process, due to the decrease in static pressure and the high flow velocity of the molten steel, penetrating vortices easily form at the bottom of the ladle. These penetrating vortices can entrain slag into the tundish, leading to inclusion defects in the cast billet. To mitigate this risk, existing processes typically employ a conservative evacuation strategy, forcibly closing the ladle's sliding gate as soon as vortex signs are detected to prevent slag from being drawn into the tundish, thus avoiding excessive molten steel residue in each ladle. Therefore, excessive residual molten steel in the ladle is a pressing technical problem that needs to be addressed. Summary of the Invention

[0003] This invention provides a production control method, apparatus, and equipment for a continuous casting production line, which solves the technical problem of excessive residual molten steel in the ladle.

[0004] In a first aspect, embodiments of the present invention provide a production control method for a continuous casting production line, the continuous casting production line including a ladle and a tundish; the method includes: during ladle casting, monitoring the weight of the remaining molten steel in the ladle; if the weight of the remaining molten steel decreases to a first preset weight, controlling the liquid level in the tundish to rise to the first preset level; if the weight of the remaining molten steel decreases to a second preset weight, reducing the opening of the sliding gate of the ladle to the first preset opening, so that the molten steel flow rate in the ladle decreases to below the first preset flow rate; the first preset flow rate is the critical flow rate for the molten steel to form a vortex; the second preset weight is less than the first preset weight; when the weight of the remaining molten steel is less than the second preset weight, there is a risk that the molten steel in the ladle will swirl and entrain slag into the tundish.

[0005] In conjunction with the first aspect of the present invention, in some embodiments, controlling the liquid level of the intermediate tundish to rise to a first preset liquid level includes: increasing the opening of the sliding gate of the ladle to a second preset opening, so as to raise the liquid level of the intermediate tundish to the first preset liquid level.

[0006] In conjunction with the first aspect of the present invention, in some embodiments, after reducing the opening of the sliding gate of the ladle to a first preset opening, the method further includes: monitoring the liquid level information of the tundish; and based on the liquid level information, controlling the opening of the sliding gate of the ladle so that the liquid level drop rate of the tundish is within a preset rate range.

[0007] In conjunction with the first aspect of the present invention, in some embodiments, controlling the opening of the sliding gate nozzle of the ladle based on the liquid level information includes: determining the current rate of liquid level descent in the intermediate ladle based on the liquid level information; increasing the opening of the sliding gate nozzle of the ladle if the current rate of descent is greater than the upper limit of the preset rate range; and decreasing the opening of the sliding gate nozzle of the ladle if the current rate of descent is less than the lower limit of the preset rate range.

[0008] In conjunction with the first aspect of the present invention, in some embodiments, a weighing sensor is installed on the slewing table of the ladle, and a radar level gauge is installed on the tundish; monitoring the weight of the remaining molten steel in the ladle includes: monitoring the weight of the remaining molten steel in the ladle through the weighing sensor; monitoring the liquid level information of the tundish includes: monitoring the liquid level information of the tundish through the radar level gauge.

[0009] In conjunction with the first aspect of the present invention, in some embodiments, after the remaining molten steel weight is reduced to the second preset weight, the method further includes: obtaining the slag mixing ratio of the molten steel in the ladle; if the slag mixing ratio is greater than a preset ratio threshold, closing the sliding gate of the ladle.

[0010] In conjunction with the first aspect of the present invention, in some embodiments, the first preset weight is 15% to 25% of the rated capacity of the ladle, and the second preset weight is 1% to 3% of the rated capacity of the ladle.

[0011] In conjunction with the first aspect of the present invention, in some embodiments, the first preset opening degree is 30% to 50%; the second preset opening degree is 70% to 80%; and the preset speed range is 5 tons / minute to 5.5 tons / minute.

[0012] Secondly, embodiments of the present invention provide a production control device for a continuous casting production line, the continuous casting production line including a ladle and a tundish; the device includes: a first monitoring unit, used to monitor the weight of the remaining molten steel in the ladle during casting; a liquid level raising unit, used to control the liquid level in the tundish to rise to a first preset liquid level if the weight of the remaining molten steel decreases to a first preset weight; and a speed limiting unit, used to reduce the opening of the sliding gate of the ladle to a first preset opening if the weight of the remaining molten steel decreases to a second preset weight, so as to reduce the molten steel flow rate in the ladle to below the first preset flow rate; the first preset flow rate is the critical flow rate for the molten steel to form a vortex; the second preset weight is less than the first preset weight; when the weight of the remaining molten steel is less than the second preset weight, there is a risk that the molten steel in the ladle will swirl and entrain slag into the tundish.

[0013] Thirdly, embodiments of the present invention provide an electronic device, including: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the computer program to implement the method described in any of the first aspects.

[0014] The one or more technical solutions provided in the embodiments of the present invention achieve at least the following technical effects or advantages: This invention monitors the weight of the remaining molten steel in the ladle during casting. If the weight of the remaining molten steel decreases to a first preset weight, the liquid level in the tundish is raised to the first preset level. If the weight of the remaining molten steel decreases to a second preset weight, the opening of the ladle's sliding gate is reduced to the first preset opening, so that the molten steel flow rate in the ladle is reduced below the first preset flow rate. The first preset flow rate is the critical flow rate at which molten steel forms vortices. The second preset weight is less than the first preset weight. When the weight of the remaining molten steel is less than the second preset weight, there is a risk that vortices in the ladle will entrain slag into the tundish. Towards the end of the ladle casting process, the weight of the remaining molten steel decreases to the second preset weight. At this point, the molten steel flow rate in the ladle is reduced to below the first preset flow rate, so vortices will not form in the ladle. Meanwhile, since the tundish level has already been raised to the first preset level when the remaining molten steel weight decreases to the first preset level, even after the remaining molten steel weight decreases to the second preset level, the tundish level remains high throughout the process, despite adjusting the ladle's sliding gate opening. This ensures sufficient static pressure at the tundish outlet, eliminates the need for any adjustment to the casting speed, and prevents the formation of vortices in the ladle. This reduces the risk of slag being drawn into the tundish by vortices and extends the casting time. Therefore, it reduces the amount of molten steel remaining in the ladle. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a flowchart of the production control method for a continuous casting production line in an embodiment of the present invention; Figure 2 This is a functional block diagram of the production control device of the continuous casting production line in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of an electronic device in an embodiment of the present invention. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0018] In this invention, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this invention.

[0019] This invention provides a production control method for a continuous casting production line, which includes a ladle and a tundish; see reference. Figure 1 As shown, the method includes the following steps S101 to S103: S101: Monitor the weight of the remaining molten steel in the ladle during the casting process.

[0020] S102: If the remaining molten steel weight decreases to the first preset weight, control the liquid level in the tundish to rise to the first preset level.

[0021] In some embodiments, controlling the liquid level in the intermediate tundish to rise to a first preset liquid level includes: increasing the opening of the sliding gate of the ladle to a second preset opening, so that the liquid level in the intermediate tundish rises to the first preset liquid level.

[0022] It should be noted that the second preset opening can be 70%–80%, and the first preset weight can be 15%–25% of the ladle's rated capacity. When the remaining molten steel weight decreases to the first preset weight, although vortices may still exist inside the ladle, these are only shallow surface vortices and will not form penetrating vortices at the bottom of the ladle. Therefore, there is no risk of vortices drawing slag into the tundish. Thus, to prevent the subsequent formation of penetrating vortices, the tundish level needs to be controlled in advance and raised to the first preset level. The first preset level can be any value within the range from the middle to the maximum value of the safe level range, which is the level range within the tundish that meets process requirements and ensures safe production.

[0023] S103: If the remaining molten steel weight decreases to the second preset weight, reduce the opening of the ladle's sliding gate to the first preset opening to reduce the molten steel flow rate in the ladle to below the first preset flow rate; the first preset flow rate is the critical flow rate at which the molten steel forms a vortex; the second preset weight is less than the first preset weight; when the remaining molten steel weight is less than the second preset weight, there is a risk that the molten steel in the ladle will cause slag to be drawn into the tundish by a vortex.

[0024] It should be noted that the first preset opening is 30%–50%, and the second preset weight is 1%–3% of the ladle's rated capacity. When the remaining molten steel weight decreases to the second preset weight, a penetrating vortex is easily formed at the bottom of the ladle, posing a risk of the vortex entraining slag into the tundish. The molten steel flow velocity refers to the velocity of the molten steel in the ladle as it converges from the surrounding area towards the bottom nozzle, i.e., the radial convergence velocity. The radial convergence velocity is the direct driving force for inducing vortices; the higher the velocity, the easier it is for the tangential momentum to be stretched and amplified, ultimately forming a penetrating vortex.

[0025] In some embodiments, after reducing the opening of the ladle's sliding gate to a first preset opening, the method further includes: monitoring the liquid level information of the tundish; and based on the liquid level information, controlling the opening of the ladle's sliding gate to ensure that the liquid level drop rate of the tundish is within a preset rate range.

[0026] In some implementations, controlling the opening of the sliding gate of the ladle based on liquid level information includes: determining the current rate of liquid level drop in the tundish based on the liquid level information; increasing the opening of the sliding gate of the ladle if the current rate of drop is greater than the upper limit of a preset rate range; and decreasing the opening of the sliding gate of the ladle if the current rate of drop is less than the lower limit of a preset rate range.

[0027] It should be noted that the preset rate range is 5 tons / minute to 5.5 tons / minute. The continuous casting production line also includes a crystallizer, with the molten steel flowing from the ladle and tundish to the crystallizer. If the tundish level drops too quickly, it will cause significant disturbances, easily trigger vortices, lead to uncontrolled crystallizer level fluctuations, and prematurely drop below the safe level. Conversely, if the tundish level drops too slowly, it means the ladle's discharge rate is high, and the molten steel velocity remains above the vortex threshold, failing to suppress vortices and preventing the amount of residual molten steel in the ladle from decreasing, thus failing to achieve the ultimate evacuation goal. Specifically, the ladle's sliding gate outlet is submerged in the molten steel in the tundish, and the tundish back pressure is equal to the static pressure corresponding to the tundish level. If the tundish liquid level drops rapidly, the tundish back pressure will plummet. According to the Bernoulli effect, the ladle injection velocity will suddenly increase, turbulence will intensify, and the suction effect of the injection on the ladle bottom flow field will strengthen. This can induce and accelerate the formation of penetrating vortices, directly offsetting the vortex suppression effect of the reduced flow rate, and even causing slag entrapment accidents. If the tundish back pressure is reduced gradually within a preset rate range, the tundish back pressure decreases linearly and smoothly. The ladle injection state transitions smoothly and will not trigger the vortex critical condition due to sudden changes in tundish back pressure, thus maintaining a low-velocity, low-turbulence suppression state. Therefore, reducing the tundish back pressure gradually within a preset rate range achieves the beneficial effect of maintaining a smooth transition of tundish back pressure and conversely avoiding the induction of ladle vortices.

[0028] In some embodiments, a weighing sensor is installed on the tundish turntable, and a radar level gauge is installed on the tundish; monitoring the weight of the remaining molten steel in the ladle includes: monitoring the weight of the remaining molten steel in the ladle through the weighing sensor; monitoring the liquid level information of the tundish includes: monitoring the liquid level information of the tundish through the radar level gauge.

[0029] In some embodiments, after the remaining molten steel weight is reduced to a second preset weight, the method further includes: obtaining the slag mixing ratio of the molten steel in the ladle; if the slag mixing ratio is greater than a preset ratio threshold, closing the sliding gate of the ladle.

[0030] The following explains why controlling the tundish level to the first preset level in advance can reduce the amount of molten steel remaining in the ladle: First, once the remaining molten steel weight decreases to the second preset weight, the sliding nozzle of the ladle must be closed to reduce the molten steel flow rate in order to disrupt the vortex formation conditions. This leads to a reduction in the amount of molten steel flowing into the tundish per unit time. To ensure smooth production and billet quality, the casting speed remains constant, so the amount of molten steel pulled from the tundish per unit time remains unchanged. Consequently, the tundish liquid level will continue to drop, resulting in a decrease in the static pressure at the tundish nozzle and a corresponding reduction in the tapping flow rate. This causes rapid fluctuations in the crystallizer liquid level, ultimately forcing a reduction in casting speed or even a halt in casting. Therefore, the proactive reduction in ladle flow rate indirectly leads to a drop in the tundish liquid level and insufficient static pressure at the tundish outlet, ultimately impacting the crystallizer and threatening production stability.

[0031] Furthermore, to prevent the tundish level from rapidly falling below the minimum safe level, the tundish level is pre-controlled and raised to the first preset level. Essentially, this involves using the tundish's capacity to create a buffer window, i.e., storing water and energy in advance, using the tundish's buffer capacity to gain time for low-flow operation at the end of the ladle's lifespan. For example, the normal steady-state tundish level corresponds to 50 tons of molten steel, while the first preset level corresponds to 63 tons, meaning an additional 13 tons of buffer molten steel is reserved. After entering the extreme emptying stage, when the remaining molten steel weight decreases to the second preset weight, the ladle's steel supply is less than the casting machine's consumption, and this shortfall is filled by these 13 tons of reserve molten steel. If the current rate of decrease in the tundish level is 5 tons / minute, this means the 13 tons of reserve can support approximately 2.6 minutes of stable low-flow emptying. This time is sufficient to reduce the remaining steel in the ladle from 3 tons to the limit of 0.8 tons. Throughout the process, the tundish level remains in a relatively high range, the tundish outlet static pressure is sufficient, the crystallizer flow rate is stable, and the casting speed requires no adjustment. If the liquid level is not raised in advance, it will drop below the minimum safe liquid level of the tundish in less than 2 minutes from the normal liquid level of 50 tons. The casting speed must be forcibly reduced or the casting must be stopped, making it impossible to complete the ultimate emptying.

[0032] It should be noted that ladle vortex can also be suppressed by installing slag retaining walls or optimizing the nozzle structure, but the hardware modification cost is high and the effect is limited. This embodiment of the invention controls the liquid level in the tundish to rise to a first preset level, storing the potential energy of the molten steel to offset the insufficient static pressure caused by the subsequent low flow rate in the ladle, while simultaneously suppressing the instability of the ladle flow. Controlling the rate of liquid level descent in the tundish within a preset range allows the stored high-level molten steel to maintain the normal casting speed of the continuous casting machine, avoiding production fluctuations. This embodiment of the invention is fully compatible with existing systems, implemented entirely based on existing automated control systems and detection equipment (weighing sensors, radar level gauges), requiring no hardware structural modifications.

[0033] The following example illustrates an embodiment of the invention. Using a real-world production case of a 210-ton slab continuous casting machine in a certain factory, the implementation steps are detailed below: Step 1: System Configuration and Parameter Setting. A high-precision weighing sensor (accuracy ±0.01 tons) is installed on the ladle turret, and a radar level gauge is installed in the tundish. In the PLC (Programmable Logic Controller) system, the first preset weight is set to 40 tons, the second preset weight to 3 tons, and the target limit for remaining steel is set to 0.8 tons. Step 2: High-Level Buffer Stage (Ladle remaining 40 tons to 3 tons of molten steel). When the remaining molten steel weight drops to 40 tons, the system automatically issues a command to raise the tundish level setting from the conventional 50 tons to 63 tons (the maximum safe level). At this time, the ladle's sliding gate opening is increased to 70%, and the tundish level quickly rises to 63 tons and remains constant. This stage lasts approximately 7 minutes, aiming to establish a sufficient reserve of molten steel in the tundish. Step 3: Limit Emptying Stage (Ladle remaining 3 tons to 0.8 tons of molten steel). When the remaining molten steel weight drops to 3 tons, the system enters the ultimate evacuation mode. The opening of the ladle's sliding gate is smoothly transitioned from 70% to 35% within 5 seconds. At this point, the ladle's pouring velocity is significantly reduced, and the intensity of the vortex at the bottom of the ladle is suppressed below the critical value. For the tundish level, since the ladle's steel supply is less than the continuous casting machine's billet consumption, the tundish level begins to slowly decrease from 63 tons, during which the rate of decrease is controlled to be stable at 5 tons / minute. Then, when the ladle slag detection system detects that the slag mixing ratio is greater than the preset threshold, the system determines that the ultimate evacuation point has been reached, immediately closes the ladle's sliding gate, and ends the casting process. Step four, effect verification: Actual measurements show that the average remaining steel weight in the ladle has decreased from 4 tons to 1.8 tons, saving 2.2 tons of molten steel per furnace. Simultaneously, analysis of billet samples shows that the (total oxygen) content of the final billet did not show an abnormal increase, proving that no significant slag entrapment occurred during this process.

[0034] The embodiments of this invention achieve the following beneficial effects: First, it significantly reduces the amount of residual steel. Through a final flow reduction strategy, the amount of residual steel in the ladle is reduced from the traditional 3-5 tons to 1-2 tons, increasing the single-furnace steel yield by more than 1%, resulting in significant economic benefits. Second, it effectively suppresses slag entrainment. By actively reducing the final flow velocity in the ladle, it disrupts the hydrodynamic conditions for vortex formation, reducing the risk of slag entrainment in the tundish from the source and improving the cleanliness of the cast billet. Third, it ensures smooth production. The introduction of a high-level buffer mechanism in the tundish solves the problem of insufficient steel supply in the tundish under low flow conditions, avoiding speed fluctuations or shutdowns caused by flow regulation. Fourth, it requires no hardware modification. It is entirely based on the existing automated control system with software logic upgrades, requiring no physical structural modifications to the ladle or tundish, resulting in low implementation costs and strong applicability.

[0035] This invention monitors the weight of the remaining molten steel in the ladle during casting. If the weight of the remaining molten steel decreases to a first preset weight, the liquid level in the tundish is raised to the first preset level. If the weight of the remaining molten steel decreases to a second preset weight, the opening of the ladle's sliding gate is reduced to the first preset opening, so that the molten steel flow rate in the ladle is reduced below the first preset flow rate. The first preset flow rate is the critical flow rate at which molten steel forms vortices. The second preset weight is less than the first preset weight. When the weight of the remaining molten steel is less than the second preset weight, there is a risk that vortices in the ladle will entrain slag into the tundish. Towards the end of the ladle casting process, the weight of the remaining molten steel decreases to the second preset weight. At this point, the molten steel flow rate in the ladle is reduced to below the first preset flow rate, so vortices will not form in the ladle. Meanwhile, since the tundish level has already been raised to the first preset level when the remaining molten steel weight decreases to the first preset level, even after the remaining molten steel weight decreases to the second preset level, the tundish level remains high throughout the process, despite adjusting the ladle's sliding gate opening. This ensures sufficient static pressure at the tundish outlet, eliminates the need for any adjustment to the casting speed, and prevents the formation of vortices in the ladle. This reduces the risk of slag being drawn into the tundish by vortices and extends the casting time. Therefore, it reduces the amount of molten steel remaining in the ladle.

[0036] Based on the same inventive concept, and referring to Figure 2 As shown, this embodiment of the invention provides a production control device 10 for a continuous casting production line, which includes a ladle and a tundish. The production control device 10 includes: a first monitoring unit 110, used to monitor the weight of the remaining molten steel in the ladle during casting; wherein, a weighing sensor is installed on the ladle's rotary table; monitoring the weight of the remaining molten steel in the ladle includes: monitoring the weight of the remaining molten steel in the ladle through the weighing sensor; a liquid level raising unit 120, used to control the liquid level in the tundish to rise to a first preset liquid level if the weight of the remaining molten steel decreases to a first preset weight; a speed limiting unit 130, used to reduce the opening of the ladle's sliding gate nozzle to a first preset opening if the weight of the remaining molten steel decreases to a second preset weight, so that the molten steel flow rate in the ladle decreases below the first preset flow rate; the first preset flow rate is the critical flow rate for the molten steel to form a vortex; the second preset weight is less than the first preset weight; when the weight of the remaining molten steel is less than the second preset weight, there is a risk that the molten steel in the ladle will swirl and entrain slag into the tundish.

[0037] The liquid level lifting unit 120 is specifically used to: increase the opening of the sliding gate of the ladle to the second preset opening, so that the liquid level of the tundish is raised to the first preset liquid level.

[0038] The production control device 10 of the continuous casting production line further includes: a rate control unit, used to monitor the liquid level information of the tundish after reducing the opening of the sliding gate nozzle of the ladle to a first preset opening; and to control the opening of the sliding gate nozzle of the ladle based on the liquid level information so that the liquid level descent rate of the tundish is within a preset rate range. Specifically, controlling the opening of the sliding gate nozzle of the ladle based on the liquid level information includes: determining the current descent rate of the liquid level in the tundish based on the liquid level information; increasing the opening of the sliding gate nozzle of the ladle if the current descent rate is greater than the upper limit of the preset rate range; and decreasing the opening of the sliding gate nozzle of the ladle if the current descent rate is less than the lower limit of the preset rate range. A radar level gauge is installed on the tundish; monitoring the liquid level information of the tundish includes: monitoring the liquid level information of the tundish through the radar level gauge.

[0039] The production control device 10 of the continuous casting production line also includes: a shut-off unit, used to obtain the slag mixing ratio of the molten steel in the ladle after the weight of the remaining molten steel has decreased to a second preset weight; if the slag mixing ratio is greater than a preset ratio threshold, the sliding gate of the ladle is shut off.

[0040] The first preset weight is 15% to 25% of the rated capacity of the ladle, and the second preset weight is 1% to 3% of the rated capacity of the ladle. The first preset opening is 30% to 50%; the second preset opening is 70% to 80%; and the preset speed range is 5 tons / minute to 5.5 tons / minute.

[0041] It should be understood that further implementation details of the production control device 10 for the continuous casting production line in the embodiments of the present invention are as described in the aforementioned production control method for the continuous casting production line, and will not be repeated here for the sake of brevity.

[0042] Based on the same inventive concept, embodiments of the present invention also provide an electronic device, such as... Figure 3 As shown, it includes a memory 304, a processor 302, and a computer program stored in the memory 304 and executable on the processor 302. The processor 302 executes the program to implement the steps described in any embodiment of the production control method for a continuous casting production line.

[0043] Among them, Figure 3In this document, a bus architecture (represented by bus 300) is used. Bus 300 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 302 and memory represented by memory 304. Bus 300 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 305 provides an interface between bus 300 and receiver 301 and transmitter 303. Receiver 301 and transmitter 303 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 302 is responsible for managing bus 300 and general processing, while memory 304 can be used to store data used by processor 302 during operation.

[0044] The functions described herein can be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions can be stored as one or more instructions or codes on or transmitted via a computer-readable medium. Other examples and embodiments are within the scope and spirit of this invention and the appended claims. For example, due to the nature of software, the functions described above can be implemented using software executed by a processor, hardware, firmware, hardwired, or any combination thereof. Furthermore, the functional units can be integrated into a single processing unit, or each unit can exist physically separately, or two or more units can be integrated into a single unit.

[0045] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For instance, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual coupling, direct coupling, or communication connection may be through some interfaces; the indirect coupling or communication connection between units or modules may be electrical or other forms.

[0046] The units described as separate components may or may not be physically separate. Similarly, the components of the control device may or may not be physical units; they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment, depending on actual needs.

[0047] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0048] The above description is merely an embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of the claims of the present invention.

Claims

1. A production control method for a continuous casting production line, characterized in that, The continuous casting production line includes a ladle and a tundish; the method includes: During the casting process, the weight of the remaining molten steel in the ladle is monitored. If the weight of the remaining molten steel decreases to a first preset weight, the liquid level in the tundish is controlled to rise to the first preset level; If the weight of the remaining molten steel decreases to a second preset weight, the opening of the sliding gate of the ladle is reduced to a first preset opening, so that the molten steel flow rate in the ladle is reduced to below the first preset flow rate; the first preset flow rate is the critical flow rate at which the molten steel forms a vortex; the second preset weight is less than the first preset weight; when the weight of the remaining molten steel is less than the second preset weight, there is a risk that the molten steel in the ladle will cause slag to be drawn into the tundish by a vortex.

2. The production control method for a continuous casting production line according to claim 1, characterized in that, The control of raising the liquid level of the intermediate package to a first preset liquid level includes: Increase the opening of the sliding gate of the ladle to the second preset opening so that the liquid level in the intermediate ladle is raised to the first preset liquid level.

3. The production control method for a continuous casting production line according to claim 2, characterized in that, After reducing the opening of the sliding gate of the ladle to the first preset opening, the method further includes: Monitor the liquid level information of the intermediate package; Based on the liquid level information, the opening of the sliding gate of the ladle is controlled so that the liquid level drop rate of the tundish is within a preset range.

4. The production control method for a continuous casting production line according to claim 3, characterized in that, The step of controlling the opening of the sliding gate of the ladle based on the liquid level information includes: Based on the liquid level information, determine the current rate of decrease of the liquid level in the intermediate package; If the current descent rate is greater than the upper limit of the preset rate range, increase the opening of the sliding gate of the ladle; If the current descent rate is less than the lower limit of the preset rate range, reduce the opening of the sliding gate of the ladle.

5. The production control method for a continuous casting production line according to claim 3, characterized in that, The slewing table of the steel ladle is equipped with a weighing sensor, and the intermediate ladle is equipped with a radar level gauge. The monitoring of the weight of the remaining molten steel in the ladle includes: monitoring the weight of the remaining molten steel in the ladle through the weighing sensor; The monitoring of the liquid level information of the intermediate package includes: monitoring the liquid level information of the intermediate package through the radar level gauge.

6. The production control method for a continuous casting production line according to claim 1, characterized in that, After the weight of the remaining molten steel decreases to the second preset weight, the process further includes: Obtain the slag mixing ratio of the molten steel in the ladle; If the slag mixing ratio is greater than a preset ratio threshold, the sliding gate of the ladle is closed.

7. The production control method for a continuous casting production line according to any one of claims 1-6, characterized in that, The first preset weight is 15% to 25% of the rated capacity of the ladle, and the second preset weight is 1% to 3% of the rated capacity of the ladle.

8. The production control method for a continuous casting production line according to claim 3, characterized in that, The first preset opening is 30% to 50%; the second preset opening is 70% to 80%; and the preset speed range is 5 tons / minute to 5.5 tons / minute.

9. A production control device for a continuous casting production line, characterized in that, The continuous casting production line includes a ladle and a tundish; the apparatus includes: The first monitoring unit is used to monitor the weight of the remaining molten steel in the ladle during the casting process. A liquid level raising unit is used to control the liquid level of the tundish to rise to a first preset liquid level if the weight of the remaining molten steel decreases to a first preset weight. A speed limiting unit is used to reduce the opening of the ladle's sliding gate to a first preset opening if the weight of the remaining molten steel decreases to a second preset weight, so that the molten steel flow rate in the ladle is reduced to below the first preset flow rate; the first preset flow rate is the critical flow rate at which the molten steel forms a vortex; the second preset weight is less than the first preset weight; when the weight of the remaining molten steel is less than the second preset weight, there is a risk that the molten steel in the ladle will swirl and entrain slag into the tundish.

10. An electronic device, characterized in that, include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the computer program, implements the method of any one of claims 1-8.

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