Casting furnace number tracking method

Abstract

Embodiments of the present application provide a continuous casting furnace number tracking method, and relate to the field of continuous casting. It aims to improve the problem that continuous casting furnace number tracking is difficult and not accurate enough. It comprises continuously acquiring a first measurement value representing the weight of a first tundish on a continuous casting platform; if the first measurement value is continuously within a first preset range for multiple times, it is determined that the first tundish is in a waiting pouring stage; if the first measurement value is continuously reduced for multiple times, and the reduction value of one of the times is greater than a second preset value, it is determined that the pouring time of the first tundish; if the first measurement value is continuously less than a second preset weight for multiple times, and the single measurement change is less than a third preset value, and the total measurement change is less than a fourth preset value, it is determined that the stopping pouring time of the first tundish; and the furnace number is incremented according to the waiting pouring stage, the pouring time and the stopping pouring time. The tracking of the furnace number is completed by collecting and analyzing the weight signal of the continuous casting platform, and the furnace number is automatically incremented after each pouring, which is efficient and accurate.

Description

Technical Field

[0001] This invention relates to the field of continuous casting, and more specifically, to a method for tracking continuous casting furnace numbers. Background Technology

[0002] The continuous casting platform in a steel plant contains a wealth of process data (such as casting speed, primary cooling water, secondary cooling water, etc.), but this data is not interconnected. Therefore, it requires manual recording and generation of corresponding paper reports during the smelting process. Automating report generation necessitates tracking the heat number (the identifier for each heat of steel), which often requires additional sensors and equipment. Manually recording process reports not only imposes a heavy workload on employees but also risks tampering with actual process data to boost performance. Adding automated process reports would require additional investment in equipment for heat number monitoring and tracking. Summary of the Invention

[0003] The present invention aims to provide, for example, a method for tracking continuous casting furnace numbers that can improve the problem of the difficulty and inaccuracy in tracking continuous casting furnace numbers.

[0004] The embodiments of the present invention can be implemented as follows:

[0005] An embodiment of the present invention provides a continuous casting furnace number tracking method, comprising: continuously acquiring a first measurement value characterizing the weight of a first tundish on a continuous casting platform; if the first measurement value is greater than a first preset weight, and the first measurement value is consistently within a first preset range multiple times, then determining that the first tundish is in a waiting-to-start-casting stage; if the first measurement value decreases multiple times, and one of the decreases is greater than a second preset value, then determining the time point at which the first measurement value begins to decrease as the start-casting time of the first tundish; if the first measurement value is less than a second preset weight multiple times, and the single measurement change is less than a third preset value, and the total measurement change is less than a fourth preset value, then determining the time point at which the first measurement value begins to be less than the second preset weight as the stop-casting time of the first tundish.

[0006] The furnace number is incremented based on the waiting stage for pouring, the pouring start time, and the pouring stop time.

[0007] In addition, the continuous casting furnace number tracking method provided in the embodiments of the present invention may also have the following additional technical features:

[0008] Optionally, the casting speed of multiple streams is obtained; if the casting speed of one of the streams is greater than zero and the first measured value changes continuously, then the first intermediate package is determined to be the first package of the current casting cycle.

[0009] Optionally, the exit temperature of the multiple streams can be obtained; if the exit temperature of the multiple streams is lower than the preset temperature, then the current pouring can be stopped.

[0010] Optionally, the drawing speed of multiple streams is obtained; the exit temperature of multiple streams is obtained; if the drawing speed of one of the streams is zero, the exit temperature of the corresponding stream is lower than the preset temperature, and the first measured value changes continuously, then it is determined that the crystallizer has experienced steel leakage.

[0011] Optionally, the drawing speed of the multiple streams is obtained; the exit temperature of the multiple streams is obtained; if the drawing speed of the multiple streams is zero, and the exit temperature of the multiple streams is lower than a preset temperature, and the first measured value changes continuously, then it is determined that the tundish is pierced.

[0012] Optionally, a second measurement value characterizing the weight of the second tundish on the continuous casting platform is continuously acquired; the second measurement value is used to perform the steps performed by the first measurement value.

[0013] The continuous casting platform is used to rotate after the first tundish stops casting, and the second tundish is used to exchange positions with the first tundish after the continuous casting platform rotates.

[0014] Optionally, the first preset weight is 75-80 tons.

[0015] Optionally, the step of ensuring that the first measured value remains within a first preset range multiple times includes: the first measured value fluctuates by less than 0.2 tons for at least three consecutive times.

[0016] Optionally, the step of "if the first measured value decreases continuously multiple times" includes: if the first measured value decreases continuously at least six times; the range of the second preset value is 0.1-0.2 tons. Optionally, the range of the third preset value is 0.04-0.06t; the range of the fourth preset value is 0.1-0.2t.

[0017] The beneficial effects of the continuous casting furnace number tracking method of this invention include, for example:

[0018] The continuous casting furnace number tracking method includes continuously acquiring a first measurement value representing the weight of the first tundish on the continuous casting platform; if the first measurement value is greater than a first preset weight, and the first measurement value is consistently within the first preset range multiple times, then the first tundish is determined to be in the waiting-to-start-casting stage; if the first measurement value decreases multiple times, and one of the decreases is greater than a second preset value, then the time point when the first measurement value begins to decrease is determined as the start-to-start-casting time of the first tundish; if the first measurement value is less than a second preset weight multiple times, and the single measurement change is less than a third preset value, and the total measurement change is less than a fourth preset value, then the time point when the first measurement value begins to be less than the second preset weight is determined as the stop-to-casting time of the first tundish; the furnace number is incremented according to the waiting-to-start-casting stage, the start-to-casting time, and the stop-to-casting time.

[0019] The furnace number is tracked by collecting and analyzing the weight signals from the continuous casting platform scale. The furnace number automatically increments after each casting cycle, thus enabling automatic data collection and correlation of process data. This method reduces the investment required for automated reporting and frees employees from repetitive record-keeping tasks. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A flowchart illustrating the steps of the continuous casting furnace number tracking method provided in this embodiment of the invention. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, 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 some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this invention, it should be noted that if terms such as "upper," "lower," "inner," or "outer" are used to indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of this invention is usually placed, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention.

[0026] Furthermore, the terms "first" and "second" are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0027] It should be noted that, where there is no conflict, the features in the embodiments of the present invention can be combined with each other.

[0028] The following is combined Figure 1 The continuous casting furnace number tracking method provided in this embodiment is described in detail.

[0029] Please refer to Figure 1 The present invention provides a continuous casting furnace number tracking method, comprising:

[0030] Step Sa1: Continuously acquire the first measurement value characterizing the weight of the first tundish on the continuous casting platform;

[0031] Step Sa2: If the first measured value is greater than the first preset weight, and the first measured value is consistently within the first preset range multiple times, then the first intermediate ladle is determined to be in the waiting-to-be-casting stage.

[0032] Step Sa3: If the first measured value decreases continuously multiple times, and one of the decreases is greater than the second preset value, then the time point when the first measured value begins to decrease is determined as the pouring time of the first intermediate ladle.

[0033] Step Sa4: If the first measured value is less than the second preset weight multiple times in a row, and the change in a single measurement is less than the third preset value, and the total change in measurement is less than the fourth preset value, then the time point when the first measured value begins to be less than the second preset weight is determined as the stopping time of the first intermediate ladle.

[0034] Step Sa5: Increment the furnace number according to the waiting stage for pouring, the pouring start time, and the pouring stop time.

[0035] Specifically, in step Sa2, the first tundish is placed on the continuous casting platform, and the weight on the platform scale changes. The flag for the first tundish inside the software changes from "stop casting" to "waiting to start casting." To prevent abnormal situations, if the first measured value remains consistently within the first preset range multiple times, it is determined that the first tundish is in the waiting-to-start casting stage.

[0036] In step Sa3, the weight of the first intermediate tundish continuously decreases, and the flag of the first intermediate tundish changes from waiting to start pouring to starting pouring. The software records the time of change as the start pouring time. To prevent abnormal situations, if the first measured value decreases multiple times consecutively, and one of the decreases is greater than the second preset value, then the time when the first measured value begins to decrease is determined as the start pouring time of the first intermediate tundish.

[0037] In step Sa4, when the weight of the first intermediate ladle remains constant for a period of time and is within a reasonable range, the flag of the first intermediate ladle changes to "stop pouring," and this time point is recorded as the stop pouring time. To prevent abnormal situations, if the first measured value is lower than the second preset weight multiple times consecutively, and the change in a single measurement is less than the third preset value, and the total change in measurements is less than the fourth preset value, then the time point when the first measured value begins to be lower than the second preset weight is determined as the stop pouring time of the first intermediate ladle.

[0038] In step Sa5, steps Sa1-Sa4 complete the casting of one furnace. After each furnace is cast, the furnace number will automatically increment, thus completing the furnace number tracking.

[0039] The automatic determination of start / stop casting based on weight signal acquisition allows for precise tracking of the furnace number, thus enabling automatic correlation and acquisition of process data. This method reduces the investment required for automated reporting and frees employees from repetitive recording tasks. It accurately calculates the weight of molten steel: output value = weight during the waiting period before casting begins - weight at the end of the shutdown period.

[0040] In this embodiment, in step Sa2, the first preset weight is 75-80 tons; the step of the first measured value being consistently within the first preset range multiple times includes: the first measured value fluctuating by less than 0.2 tons for at least three consecutive times.

[0041] To prevent abnormal situations, such as large weight fluctuations on the scale when the tundish is picked up and put down, this method will determine the tundish weight by checking that it is stable above 75 tons, the lowest weight of the tundish in history, and that the first measurement values ​​obtained in the three measurements are all within the first preset range, that is, the total error of the first measurement values ​​obtained in the three measurements is within 0.2t. The measurement is taken every 10 seconds to confirm that the tundish is in place and to wait for the pouring to begin.

[0042] The first preset weight is the lower limit of the total weight of the tundish and molten billet in continuous casting. The weight of the tundish and molten billet is determined by the capacity of the steel plant's electric arc furnace / converter; different steel plants have different weights for the tundish and molten billet. The first preset weight is selected as a smaller value, so that if it is greater than the first preset weight, it can be determined that the tundish is full of molten billet. The first preset weight can be 75, 76, 77, 78, 79, or 80 tons. "At least three times" includes three, four, or five or more times, and the number of times can also be reduced, depending on the actual needs.

[0043] In this embodiment, step Sa3, the step of if the first measured value decreases continuously multiple times includes: if the first measured value decreases continuously at least six times; the range of the second preset value is 0.1-0.2 tons.

[0044] Specifically, the start of pouring is determined when the weight of the tundish decreases continuously for 6 times and the single span is greater than 0.1t. The first measurement value is read every 10 seconds, and the selected time point is the time point when the first change occurs.

[0045] "At least six times" includes six, seven, or eight times or more. The number of times can also be reduced, such as three, four, or five times, depending on the actual needs.

[0046] In this embodiment, in step Sa4, the range of the third preset value is 0.04-0.06t; the range of the fourth preset value is 0.1-0.2t. The third preset values ​​are 0.04, 0.05, and 0.06t. The fourth preset values ​​are 0.1 and 0.2t.

[0047] Specifically, if the first measurement value of the tundish remains unchanged for six consecutive times, and the change in a single measurement value is less than 0.05t, and the total change is less than 0.1t, the first time is recorded as the stop-casting time. The second preset weight is the upper limit of the empty tundish weight in continuous casting. The empty tundish weight is determined by the capacity of the steel plant's electric arc furnace / converter; different steel plants have different empty tundish weights. For example, the empty tundish weight in our plant is 35t-40t. The second preset weight is selected from the larger values ​​of the empty tundish weight in continuous casting, so that when the measured value is less than the second preset weight, it can encompass a wider range of tundishes of different weights in the empty ladle state. Setting the second preset weight is to prevent abnormal situations such as horizontal billet from causing the tundish to stop casting and thus misjudging the stop-casting. When the flag status changes to stop-casting, this method will read all process data records of the PLC during this period, such as the three-strand casting speed, and take the average value, peak value, and standard value of the three-strand casting speed to give a quality score for this batch of data. The automated reading and calculation method not only ensures the accuracy of the data but also provides a multi-dimensional understanding of the production situation.

[0048] By automatically determining the start and stop of pouring based on weight signals, furnace number tracking can be achieved, thus enabling automatic correlation and collection of process data. This method reduces the investment required for automated reporting and frees employees from repetitive recording tasks.

[0049] In this embodiment, after the first intermediate ladle has been poured for a certain period of time, the second intermediate ladle will be placed on the continuous casting platform. The judgment criteria are the same as in the first step. At this time, the flag of the second intermediate ladle will change to waiting to start pouring.

[0050] In this embodiment, a second measurement value characterizing the weight of the second tundish on the continuous casting platform is continuously acquired; the continuous casting platform is used to rotate after the first tundish stops casting, and the second tundish is used to exchange positions with the first tundish after the continuous casting platform rotates.

[0051] The second measurement value is used to execute the steps performed by the first measurement value. In other words, the second measurement value replaces the first measurement value in continuing to determine the state of the intermediate package.

[0052] Specifically, if the second measured value is greater than the first preset weight, and the second measured value is consistently within the first preset range multiple times, then the second intermediate tundish is determined to be in the waiting-to-be-casting stage; if the second measured value decreases multiple times, and one of the decreases is greater than the second preset value, then the time point when the second measured value begins to decrease is determined as the casting time of the second intermediate tundish; if the second measured value is less than the second preset weight multiple times, and the change in a single measurement is less than the third preset value, and the total change in measurement is less than the fourth preset value, then the time point when the second measured value begins to be less than the second preset weight is determined as the stopping time of the second intermediate tundish.

[0053] In this embodiment, step Sb1 involves obtaining the casting speed of multiple streams; step Sb2 involves determining the first intermediate ladle as the first ladle of the current casting cycle if the casting speed of one of the streams is greater than zero and the first measured value changes continuously. This embodiment uses a three-stream configuration for illustration.

[0054] Specifically, the casting speed can determine the start and end of a casting cycle. A single casting cycle in continuous casting involves the start and stop of multiple heats of molten steel. During continuous casting, the casting speed remains above 0, only decreasing to 0 after the cycle ends. Furthermore, the data for the first ladle (the first heat of molten steel in a cycle) in the 5 minutes before casting can have a relatively large error. Determining the timing of the first ladle can eliminate data with large errors, ensuring data accuracy. Specifically, assuming the weight of the tundish continuously changes, the first ladle of the current cycle can be determined when the casting speed of one of the three streams is greater than 0.

[0055] In this embodiment, step Sc1 involves obtaining the exit temperature of the multiple streams; step Sc2 involves determining to stop pouring for the current pour if the exit temperature of all multiple streams is lower than the preset temperature.

[0056] Specifically, the temperature of the billet outlet is used to help determine the start and stop of casting. Under normal casting conditions, the temperature of the billet after casting is around 1100 degrees Celsius. When casting stops, there are no billets in the outlet, and the temperature will be much lower. When the temperature of the three outlets is below 700 degrees Celsius, casting can be stopped.

[0057] The following are the criteria for identifying abnormal situations:

[0058] In this embodiment, step Sb1 is to obtain the drawing speed of the multiple streams; step Sc1 is to obtain the billet outlet temperature of the multiple streams; step Sd1 is to determine that the crystallizer has experienced steel leakage if the drawing speed of one of the streams is zero, the corresponding billet outlet temperature of that stream is lower than the preset temperature, and the first measured value changes continuously.

[0059] Specifically, in the event of production anomalies, such as a horizontal billet caused by steel leakage, the casting speed of a certain stream will gradually return to zero, the exit temperature of the stream will be lower than 700 degrees Celsius, and the weight will continue to change, without affecting the casting data of the furnace and the judgment of the end of the casting cycle.

[0060] In this embodiment, step Sb1 is to obtain the drawing speed of the multiple streams; step Sc1 is to obtain the exit temperature of the multiple streams; step Se1 is to determine that the tundish is pierced if the drawing speed of the multiple streams is zero, the exit temperature of the multiple streams is lower than the preset temperature, and the first measured value changes continuously.

[0061] Specifically, if steel piercing occurs, the intermediate ladle car will be driven away immediately, the weight will change, the casting speed will gradually return to zero, and the temperature of the billet exiting the trough will be lower than 700 degrees, and casting will be automatically stopped.

[0062] If a data acquisition error causes a missing data stream, this will not lead to a false judgment, as all three streams' data must meet the requirements for a water stoppage to be considered. If the missing data is due to equipment replacement, the missing data for that stream will not affect the other two streams' data, thus not impacting the judgment. For abnormal water stoppages, the main operator can explain the reason for the stoppage in the current watering session's remarks.

[0063] According to the continuous casting furnace number tracking method provided in this embodiment, the working principle of the continuous casting furnace number tracking method is: the determination of the stop time is also based on weight, which will not lead to misjudgment in abnormal situations. When the continuous casting ladle is being poured, there may be a special situation where the tundish temperature is insufficient and the continuously cast billet cannot continue to be pulled. In this case, when the molten steel in the ladle is pulled halfway, the continuous casting turret may need to be rotated to pull down the problematic ladle for processing, and directly pour the tundish on the other turret arm. In response to this situation, this method will determine that if the weight of the tundish in the pouring state does not reach the second preset weight (the weight of the empty ladle), and directly returns to 0, it is determined to be an abnormal situation. The flag will automatically mark the stop of pouring according to the abnormal situation, and the tracking tundish will be switched.

[0064] The continuous casting furnace number tracking method provided in this embodiment has at least the following advantages:

[0065] To ensure weight accuracy, this method considers not only the overall weight change of the tundish but also individual weight fluctuations when determining whether to start or stop pouring. A decision is only made if the overall weight trend is met and the individual change is reasonable. This addresses the issue of platform scale fluctuations caused by placing or removing the tundish or other equipment on and off the platform. Compared to existing patented methods using markers and weight thresholds, this method adds monitoring of individual changes and trends throughout the entire pouring process, automatically determining start and stop times. This allows for precise tracking of the furnace number, enabling automatic correlation and collection of process data.

[0066] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for tracking continuous casting furnace numbers, characterized in that, include: The first measured value characterizing the weight of the first tundish on the continuous casting platform is continuously acquired; If the first measured value is greater than the first preset weight, and the first measured value is consistently within the first preset range multiple times, then the first intermediate tundish is determined to be in the waiting-to-be-casting stage. If the first measured value decreases continuously multiple times, and one of the decreases is greater than the second preset value, then the time point at which the first measured value begins to decrease is determined as the pouring time of the first intermediate tundish. If the first measured value is less than the second preset weight multiple times in a row, and the change in a single measurement is less than the third preset value, and the total change in measurement is less than the fourth preset value, then the time point when the first measured value begins to be less than the second preset weight is determined as the stopping time of the first intermediate ladle. The furnace number is incremented based on the waiting stage for pouring, the pouring start time, and the pouring stop time.

2. The continuous casting furnace number tracking method according to claim 1, characterized in that: Obtain the pull speed of multiple streams; If the casting speed of one of the intermediate batches is greater than zero, and the first measured value changes continuously, then the first intermediate batch is determined to be the first batch of the current casting.

3. The continuous casting furnace number tracking method according to claim 1, characterized in that: Obtain the billet outlet temperature of the multi-flow billet; If the exit temperature of all multiple flows is lower than the preset temperature, then the current pouring cycle will be stopped.

4. The continuous casting furnace number tracking method according to claim 1, characterized in that: Obtain the pull speed of multiple streams; Obtain the billet outlet temperature of the multi-flow billet; If the casting speed of one of the streams is zero, the corresponding billet outlet temperature of that stream is lower than the preset temperature, and the first measured value changes continuously, then it is determined that the crystallizer is leaking steel.

5. The continuous casting furnace number tracking method according to claim 1, characterized in that: Obtain the pull speed of multiple streams; Obtain the billet outlet temperature of the multi-flow billet; If the drawing speed of all the multiple streams is zero, and the exit temperature of all the multiple streams is lower than the preset temperature, and the first measured value changes continuously, then it is determined that the tundish is pierced.

6. The continuous casting furnace number tracking method according to any one of claims 1-5, characterized in that: Continuously acquire the second measurement value characterizing the weight of the second tundish on the continuous casting platform; The second measurement value is used to perform the steps performed by the first measurement value; The continuous casting platform is used to rotate after the first tundish stops casting, and the second tundish is used to exchange positions with the first tundish after the continuous casting platform rotates.

7. The continuous casting furnace number tracking method according to any one of claims 1-5, characterized in that: The first preset weight is 75-80 tons.

8. The continuous casting furnace number tracking method according to any one of claims 1-5, characterized in that: The step of ensuring that the first measured value remains within the first preset range multiple times includes: the first measured value fluctuates by less than 0.2 tons for at least three consecutive times.

9. The continuous casting furnace number tracking method according to any one of claims 1-5, characterized in that: The step of if the first measured value decreases continuously multiple times includes: if the first measured value decreases continuously at least six times; The second preset value ranges from 0.1 to 0.2 tons.

10. The continuous casting furnace number tracking method according to any one of claims 1-5, characterized in that: The range of the third preset value is 0.04-0.06t; the range of the fourth preset value is 0.1-0.2t.

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