Methods, apparatus, equipment, and media for determining converter ferroalloying parameters in semi-steelmaking

Abstract

This application discloses a method for determining converter ferroalloy charging parameters in semi-steelmaking, including continuously collecting real-time position and weight information of the target converter crane to determine whether the crane has entered the ferroalloy charging stage; calculating the standard deviation of the crane weight over a fixed time period of the most recent first preset number to determine the weight of the ladle before ferroalloy charging; determining the start time of ferroalloy charging; determining the end time of ferroalloy charging; determining the weight of the empty ladle after ferroalloy charging; subtracting the weight of the empty ladle after ferroalloy charging from the weight of the ladle before ferroalloy charging to obtain the ferroalloy charging weight; and subtracting the start time of ferroalloy charging from the end time of ferroalloy charging to obtain the ferroalloy charging time. This method can quickly, accurately, and stably obtain converter ferroalloy charging parameters in semi-steelmaking without hardware modification, improving converter control, reducing alloy, auxiliary material, and oxygen consumption, and reducing make-up blowing. This application also discloses a device, equipment, and storage medium for determining converter ferroalloy charging parameters in semi-steelmaking, which has the same advantages as this method.

Description

Technical Field

[0001] This invention belongs to the field of metallurgical automation and steelmaking control technology, and in particular relates to the method, apparatus, equipment and medium for determining converter iron addition parameters in semi-steelmaking. Background Technology

[0002] Semi-steel converter steelmaking is the core process in the vanadium-titanium magnetite smelting process. Its typical flow is as follows: vanadium-containing molten iron → vanadium extraction converter → semi-steel → desulfurization → desulfurized semi-steel → steelmaking converter → molten steel → refining → continuous casting → billet. The steelmaking converter plays a crucial role in heating the molten pool, deep decarburization / phosphorization, alloying, and matching the smelting rhythm, directly determining steel quality, production efficiency, and production costs.

[0003] In semi-steel converter steelmaking, obtaining the weight and time of ferroalloy addition quickly and accurately is of great significance. First, the weight of ferroalloy addition directly determines the amount of oxygen, coolant, slagging agent, and alloy added calculated by the converter static model. Large weight deviations can lead to composition and temperature out of control. Second, inaccurate ferroalloy addition results in low alloying success rate after the furnace, waste of auxiliary materials, and increased steel consumption. Third, the ferroalloy addition time is the core parameter for calculating the temperature drop during the ferroalloy addition process. If the time is not calculated accurately, it will lead to distortion of the furnace inlet temperature calculation, which in turn will cause deviation in the final temperature. Moreover, accurate ferroalloy addition time can optimize the smelting sequence, reduce waiting time, reduce redundant operations, and shorten the smelting cycle. Finally, stable ferroalloy addition weight and time can improve the automation level of the entire process, reduce manual intervention, and reduce safety risks.

[0004] In the current semi-steelmaking process, there are two main ways to determine the weight of the iron added: The first method is to weigh the empty ladle with the first crane and the full ladle with the second crane in the vanadium extraction converter area, and take the difference between the two weighing results as the weight of the semi-steel. However, this method has obvious drawbacks. First, different crane weighing systems have inherent deviations, which will lead to a distortion of the weight difference. Second, there is significant iron loss in the desulfurization process, and the weight of the vanadium extracted from the furnace is not equal to the weight entering the converter. This error cannot be corrected. The second method involves continuous weighing using the same crane during the iron-addition process. The weight of the empty tank after iron-addition is calculated by subtracting the weight of the full tank before iron-addition. However, this method has several drawbacks. The crane moves laterally while the tank moves vertically. When the auxiliary hook is tilted during iron-addition, the weighing signal fluctuates violently, making it impossible to obtain a stable weight. Furthermore, the method for determining the iron-addition time is more crude. The duration of the converter's "iron-addition state" is directly used as the iron-addition time. However, this state includes the time for adding scrap steel, equipment waiting time, and interval time, which is much longer than the actual iron-addition time. This leads to a significant deviation of the calculated temperature drop from the actual situation.

[0005] In summary, none of the aforementioned existing technologies can eliminate the weighing fluctuations caused by the movement of the tank, nor can they accurately identify the start and end times of iron mixing, thus failing to quickly, accurately, and stably obtain the iron mixing weight and time for semi-steelmaking. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a method, apparatus, equipment, and medium for determining converter ferroalloying parameters in semi-steelmaking. This method enables the rapid, accurate, and stable acquisition of converter ferroalloying parameters in semi-steelmaking without requiring hardware modifications, thereby improving converter control, reducing alloy, auxiliary material, and oxygen consumption, and minimizing the need for supplementary blowing.

[0007] The method for determining converter iron addition parameters in semi-steelmaking provided by this invention includes:

[0008] Continuously collect real-time position and weight information of the crane on the charging span of the target converter to determine whether the crane has entered the iron dispensing stage;

[0009] In response to the determination that the crane has entered the iron-filling stage, based on the real-time weight information of the crane, the standard deviation of the crane weight over a fixed time period of the most recent first preset number is calculated. When the standard deviation of the crane weight meets the first preset condition, the weight of the heavy tank before iron filling is determined.

[0010] Analyze whether the average weight of the cranes over a fixed time period of the first preset quantity meets the second preset condition. If it does, determine the start time of iron exchange.

[0011] Analyze whether the average weight of the cranes within a fixed time period of the second preset quantity meets the third preset condition. If it does, determine the time when the iron exchange is completed.

[0012] Analyze whether the standard deviation of the crane weight within a fixed time period of the third preset quantity meets the fourth preset condition. If it does, determine the weight of the empty tank after iron exchange.

[0013] The weight of the iron-filled container is obtained by subtracting the weight of the empty container after iron filling from the weight of the container before iron filling. The iron filling time is obtained by subtracting the start time of iron filling from the end time of iron filling.

[0014] Preferably, in the above-mentioned method for determining converter ferroalloying parameters in semi-steelmaking, when the standard deviation of the crane weight meets the first preset condition, the weight of the ladle before ferroalloying is determined as follows:

[0015] When the standard deviation of the crane weight is not greater than the standard deviation threshold, the average crane weight in the last fixed time period is taken as the weight of the heavy tank before iron filling.

[0016] Preferably, in the above-mentioned method for determining converter ferroalloying parameters in semi-steelmaking, the step of analyzing whether the average crane weight over a fixed time period of the first preset quantity meets the second preset condition is, and if so, determining the ferroalloying start time as follows:

[0017] Analyze whether the average crane weight over the most recent fixed time period of the first preset quantity has been continuously decreasing and is within the preset weight range of the heavy tank. If so, the midpoint of the first fixed time period is taken as the start time of the iron exchange.

[0018] Preferably, in the above-mentioned method for determining converter ferroalloying parameters in semi-steelmaking, the step of analyzing whether the average crane weight over a fixed time period of the most recent second preset quantity meets a third preset condition is taken. If it does, the ferroalloying completion time is determined as follows:

[0019] Analyze whether the average crane weight over a fixed time period within the second preset quantity has decreased first and then increased. If so, take the last moment of the fixed time period in the middle as the moment when the iron exchange is completed.

[0020] Preferably, in the above-mentioned method for determining converter ferroalloying parameters in semi-steelmaking, the step of analyzing whether the standard deviation of crane weights within a fixed time period of the most recent third preset quantity meets a fourth preset condition is performed. If it does, the weight of the empty ladle after ferroalloying is determined as follows:

[0021] If the standard deviation of the crane weight within the most recent third preset number of fixed time periods is not greater than the standard deviation threshold and the average crane weight within each fixed time period is within the preset empty tank weight range, then the average crane weight within the first fixed time period is taken as the empty tank weight after iron addition.

[0022] Preferably, in the above-mentioned method for determining converter ferroalloy charging parameters in semi-steelmaking, the step of continuously collecting real-time position information and real-time weight information of the crane on the target converter charging span to determine whether the crane has entered the ferroalloy charging stage includes:

[0023] The location of the target converter furnace opening and the preset weight range of the heavy jar are obtained. When the difference between the real-time location information of the crane and the location of the target converter furnace opening is within the preset location difference range, and the real-time weight information of the crane is within the preset weight range of the heavy jar, it is determined that the crane has entered the iron-refilling stage.

[0024] Preferably, in the above-mentioned method for determining the converter iron charging parameters in semi-steelmaking, the real-time position information and real-time weight information of the crane on the charging span of the target converter are continuously collected at fixed time intervals ranging from 0.1 seconds to 0.5 seconds.

[0025] The converter iron addition parameter determination device in semi-steelmaking provided by this invention includes:

[0026] The data acquisition and judgment unit is used to continuously acquire the real-time position information and real-time weight information of the crane on the charging span of the target converter, and to determine whether the crane has entered the iron-dispensing stage. When it is determined that the crane has entered the iron-dispensing stage, the pre-iron-dispensing weight determination unit is triggered.

[0027] The unit for determining the weight of the heavy tank before iron filling is used to calculate the standard deviation of the crane weight over a fixed time period based on the real-time weight information of the crane, and to determine the weight of the heavy tank before iron filling when the standard deviation of the crane weight meets the first preset condition.

[0028] The unit for determining the start time of iron exchange is used to analyze whether the average weight of cranes over a fixed time period of the first preset quantity meets the second preset condition. If it does, the start time of iron exchange is determined.

[0029] The unit for determining the completion time of iron exchange is used to analyze whether the average weight of cranes within a fixed time period of the second most recent preset quantity meets the third preset condition. If it does, the completion time of iron exchange is determined.

[0030] The unit for determining the weight of the empty can after iron mixing is used to analyze whether the standard deviation of the crane weight within a fixed time period of the most recent third preset quantity meets the fourth preset condition. If it does, the weight of the empty can after iron mixing is determined.

[0031] The iron mixing weight and iron mixing time determination unit is used to subtract the weight of the empty tank after iron mixing from the weight of the heavy tank before iron mixing to obtain the iron mixing weight, and to subtract the iron mixing start time from the iron mixing completion time to obtain the iron mixing time.

[0032] The converter ferroalloying parameter determination device in semi-steelmaking provided by this invention includes:

[0033] Memory, used to store computer programs;

[0034] A processor, used to execute the computer program to implement the steps of the method for determining converter iron addition parameters in semi-steelmaking as described in any of the above.

[0035] The present invention provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the steps of the method for determining converter iron addition parameters in semi-steelmaking as described in any of the above claims.

[0036] As described above, the method for determining converter ferroalloy charging parameters in semi-steelmaking provided by the present invention includes: firstly, continuously collecting real-time position and weight information of the crane on the charging span of the target converter; secondly, determining whether the crane has entered the ferroalloy charging stage; and thirdly, in response to determining that the crane has entered the ferroalloy charging stage, calculating the standard deviation of the crane weight over a fixed time period based on the real-time weight information of the crane. When the standard deviation of the crane weight meets the first preset condition, the weight of the ladle before ferroalloy charging is determined. Then, the average crane weight over a fixed time period of the first preset number of recent years is analyzed to see if it meets the second preset condition. If it does, the start time of ferroalloy charging is determined, and then the average weight of the ladle before ferroalloy charging is analyzed again. The method determines the completion time of iron charging by analyzing whether the average crane weight over a fixed time period meets a third preset condition. If so, the method determines the completion time of iron charging. It also analyzes whether the standard deviation of crane weight over a fixed time period within the most recent third preset quantity meets a fourth preset condition. If so, the method determines the weight of the empty ladle after iron charging. Finally, the method subtracts the weight of the empty ladle after iron charging from the weight of the full ladle before iron charging to obtain the iron charging weight. The method subtracts the start time of iron charging from the completion time of iron charging to obtain the iron charging time. Therefore, this method can quickly, accurately, and stably obtain the converter iron charging parameters in semi-steelmaking without hardware modification, thereby improving converter control, reducing alloy, auxiliary material, and oxygen consumption, and reducing the need for supplementary blowing. The converter iron charging parameter determination device, equipment, and storage medium provided by this invention have the same advantages as the method described above. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0038] Figure 1 A schematic diagram of an embodiment of the method for determining converter iron addition parameters in semi-steelmaking provided by the present invention;

[0039] Figure 2 A schematic diagram of an embodiment of the converter iron addition parameter determination device in semi-steelmaking provided by the present invention;

[0040] Figure 3 A schematic diagram of an embodiment of the converter iron addition parameter determination device in semi-steelmaking provided by the present invention. Detailed Implementation

[0041] The core of this invention is to provide a method, apparatus, equipment, and medium for determining converter ferroalloying parameters in semi-steelmaking. This method enables the rapid, accurate, and stable acquisition of converter ferroalloying parameters in semi-steelmaking without the need for hardware modifications, thereby improving converter control, reducing the consumption of alloys, auxiliary materials, and oxygen, and minimizing the need for supplementary blowing.

[0042] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] An example of the implementation of the method for determining converter iron addition parameters in semi-steelmaking provided by this invention. Figure 1 As shown, Figure 1 This is a schematic diagram of an embodiment of the method for determining converter iron addition parameters in semi-steelmaking provided by the present invention. The method may include the following steps:

[0044] S1: Continuously collect real-time position and weight information of the crane on the charging span of the target converter to determine whether the crane has entered the iron dispensing stage;

[0045] Specifically, the real-time position and weight information of the crane on the target converter charging span can be continuously collected at fixed time intervals ranging from 0.1 to 0.5 seconds. The shorter the time interval, the more accurate the final judgment result; this can be selected according to actual needs. It should also be noted that this step specifically obtains the target converter opening position and the preset weight range of the tumbler. The target converter opening position information can be collected offline, as this position information is generally fixed. The preset weight range W1 to W2 can be determined based on the crane weighing data in the large-scale production data, which can be obtained from the converter secondary system. This is because this weight is measured by the crane scale and then transmitted to the converter secondary system. When the difference between the real-time crane position and the target converter opening position is within the preset position difference range (e.g., the preset position difference range can be 1 meter to 3 meters), and the real-time crane weight information is within the preset weight range W1 to W2, meaning the crane... If the real-time weight is greater than W1 and less than W2, the crane is considered to have entered the iron-filling stage. This demonstrates that combining the factors of location and the weight of the heavy container ensures a more accurate determination of whether the iron-filling stage has been entered. Furthermore, the duration of this state can be measured to see if it reaches a certain time threshold. For example, if this state lasts for more than 10 seconds, the iron-filling stage can be more accurately determined, rather than being a misjudgment caused by a sudden change in weight. Of course, this time threshold can be set longer, for example, any value between 10 and 40 seconds. The longer the time threshold is set, the lower the probability of misjudgment. This can be selected based on actual production needs.

[0046] S2: In response to the judgment that the crane has entered the iron-filling stage, based on the real-time weight information of the crane, calculate the standard deviation of the crane weight over a fixed time period of the most recent first preset quantity. When the standard deviation of the crane weight meets the first preset condition, determine the weight of the heavy tank before iron filling.

[0047] It should be noted that the principle of this step is to determine that the real-time weight data of the ladle collected by the crane is stable, without shaking, swaying of the lifting equipment, vehicle bumps or disturbances, or hook slippage. The fluctuation of the weight data collected within the current fixed time period is sufficiently small. Only then can the weight read be the true and stable weight of the molten steel ladle. This avoids the possibility of the weight being too high or too low due to shaking, thus ensuring the accuracy of the ladle weight calculation before iron pouring. The first preset number can be no less than 5, and the value range of each fixed time period can be 2 to 5 seconds. The standard deviation of the crane weight for each fixed time period can be calculated using the following formula:

[0048] ;

[0049] Where σ is the standard deviation of weighing over a fixed time period, in tons, and x iThe instantaneous weighing value is the i-th value obtained within a fixed time period, in tons; This represents the average weighing weight over the fixed time period, expressed in tons.

[0050] In this case, when the standard deviation of the crane weight meets the first preset condition, the weight of the heavy hopper before iron transfer can be determined as follows: when the standard deviation σ of these crane weights is not greater than the standard deviation threshold σ1, where σ1 can range from 0.1 to 0.3, and the average weight of each fixed time period is within W1 to W2, the average crane weight of the last fixed time period is taken as... As the weight of the heavy ladle before iron addition, this stable weight is denoted as W. 重 This effectively eliminates weighing deviations caused by the movement of the semi-steel ladle during the iron-filling process, thus more accurately determining the true weight of the ladle. Of course, other judgment methods can be chosen according to actual needs. For example, it can be determined whether the ratio of the crane weight standard deviation to the average crane weight within the current time period is less than a preset relative fluctuation threshold. This preset relative fluctuation threshold can be 0.2%, 0.3%, or 0.5%. Alternatively, the crane weight standard deviation calculated by multiple consecutive sliding windows can show a decreasing trend, and the standard deviation under the current window can be less than a preset steady-state standard deviation threshold. Each sliding window removes the earliest set of sampled data and adds the latest set of weight data, continuously iterating the calculation of the standard deviation. When the standard deviation continuously decreases for three consecutive times and finally falls below 0.6t, the data is considered to have converged and stabilized, locking in the weight of the ladle before iron filling. Of course, many other methods can also be used; this is not limited here.

[0051] S3: Analyze whether the average weight of cranes over a fixed time period of the first preset quantity meets the second preset condition. If it does, determine the start time of iron exchange.

[0052] Specifically, we can analyze the average crane weight over a fixed time period of the most recent first preset quantity n1. Whether it is strictly in a continuous decreasing trend, that is, within the first fixed time period in the time sequence ≥The second fixed time period And within the preset weight range of the heavy tank, i.e. If so, then the midpoint of the first fixed time interval will be taken as the start time of iron exchange, denoted as t. 开始 Of course, other methods can also be used, such as judging whether the average crane weight is stable within the preset workstation weight range, or whether the absolute value of the difference between the average crane weight in this window and the weight of the heavy jar before iron addition after the heavy jar was judged to be stable in the previous stage is less than the preset allowable weight deviation threshold, or whether the difference between each pair of average crane weights calculated from multiple consecutive sliding windows is less than the preset steady-state deviation limit and continues to maintain the preset cycle. This can be selected according to actual needs.

[0053] S4: Analyze whether the average crane weight within a fixed time period of the second preset quantity meets the third preset condition. If it does, determine the time when the iron exchange is completed.

[0054] Specifically, this step determines the completion of molten iron pouring and the flow of no more molten iron from the ladle into the converter by averaging the crane weight within a continuous sampling window. The ladle weight then stops decreasing and stabilizes. This accurately captures the moment when iron pouring is complete, avoiding distortions in the calculation of iron pouring quantity and rate caused by recording the end time too early or too late. A preferred method for this step is to analyze the average crane weight over a fixed time period of the most recent second preset quantity 2n1 (n1 is a positive integer ≥ 5). Whether to decrease first and then increase, that is, the fixed time interval from the 1st to the n1st in the time series. Continuous decrease, that is The fixed time interval from the (n1+1)th to the 2n1st time interval within the time series Continuous increase, that is If so, it means that the iron exchange is completed at the last moment of the n1th fixed time period. At this time, the weight of the semi-steel can no longer decrease. At the same time, since the auxiliary hook is disengaged, the upward pulling force that the auxiliary hook originally exerted on the semi-steel can will disappear, and the weighing weight will continue to increase. Therefore, the last moment of the fixed time period in the middle, that is, the last moment of the n1th fixed time period, is taken as the time when the iron exchange is completed, denoted as t. 结束 This shows that it allows for a more precise capture of the moment when the iron mixing process is completed.

[0055] S5: Analyze whether the standard deviation of the crane weight within a fixed time period of the most recent third preset quantity meets the fourth preset condition. If it does, determine the weight of the empty tank after iron exchange.

[0056] Specifically, this step can be as follows: Analyze whether the standard deviation σ of the crane weight within a fixed time period of the most recent third preset quantity n1 (which can be the same as or different from the first preset quantity n1, and is not limited here) is not greater than the standard deviation threshold σ1, and whether the average crane weight within each fixed time period is within a preset empty tank weight range W3 to W4. This preset empty tank weight range can be collected offline from the overhead crane weighing data in the large production data. If so, then the average crane weight within the first fixed time period is... The weight of the empty can after iron mixing is denoted as W. 空 This effectively eliminates weighing deviations caused by the movement of the semi-steel tank during the iron-filling process, and accurately determines the true weight of the empty tank.

[0057] S6: Subtract the weight of the empty tank after iron mixing from the weight of the tank before iron mixing to obtain the weight of iron mixing. Subtract the start time of iron mixing from the time when iron mixing is completed to obtain the time of iron mixing.

[0058] Specifically, formula W can be used. 兑铁 =W 重 -W 空 Quickly determine the weight of the iron to be added online using the formula T. 兑铁 =t 结束 -t 开始 Quickly determine the iron exchange time online.

[0059] It can be seen that the embodiments of the above-mentioned method provided in this application have the following advantages: the method of fusion of positioning and weighing data is used to determine whether iron filling has started, thereby avoiding interference from non-iron filling state. Moreover, the use of sliding standard deviation for stable weighing effectively eliminates fluctuations caused by crane movement, tank shaking, etc. The start and end time of iron filling can be automatically identified according to the weight trend. The iron filling is completed when the weight first drops and then rises. This identification method is more accurate. Furthermore, the same crane can be used for full-process measurement, which can eliminate the result deviation caused by cross-crane weighing method and is closer to the actual furnace input. This method does not require additional hardware and can be directly connected to the existing secondary system, which has the advantages of fast deployment and low cost.

[0060] As described above, in the embodiment of the method for determining converter ferroalloy charging parameters in semi-steelmaking provided by the present invention, the method includes first continuously collecting real-time position information and real-time weight information of the crane on the charging span of the target converter, determining whether the crane has entered the ferroalloy charging stage, and then, in response to determining that the crane has entered the ferroalloy charging stage, calculating the standard deviation of the crane weight over the most recent first preset number of fixed time periods based on the real-time weight information of the crane. When the standard deviation of the crane weight meets the first preset condition, the weight of the tundish before ferroalloy charging is determined. Then, the method analyzes whether the average value of the crane weight over the most recent first preset number of fixed time periods meets the second preset condition. If it does, the starting time of ferroalloy charging is determined. Finally, the method analyzes the most recent first preset number of fixed time periods. If the average crane weight over a fixed time period of a predetermined quantity meets the third predetermined condition, the time of completion of iron charging is determined. Then, the standard deviation of crane weight over the most recent fixed time period of the third predetermined quantity is analyzed to determine if it meets the fourth predetermined condition. If so, the weight of the empty ladle after iron charging is determined. Finally, the weight of the empty ladle after iron charging is subtracted from the weight of the full ladle before iron charging to obtain the iron charging weight. The time of completion of iron charging is subtracted from the time of start of iron charging to obtain the iron charging time. Therefore, it can be seen that this method can quickly, accurately, and stably obtain the converter iron charging parameters in semi-steelmaking without hardware modification, thereby improving the converter control level, reducing the consumption of alloys, auxiliary materials, and oxygen, and reducing the need for supplementary blowing.

[0061] An example of implementing the converter iron addition parameter determination device in semi-steelmaking provided by the present invention. Figure 2 As shown, Figure 2 This is a schematic diagram of an embodiment of the converter iron-addition parameter determination device in semi-steelmaking provided by the present invention. The device may include:

[0062] The data acquisition and judgment unit 201 is used to continuously acquire the real-time position information and real-time weight information of the crane on the target converter charging span, and to determine whether the crane has entered the iron-feeding stage. When it is determined that the crane has entered the iron-feeding stage, the pre-iron-feeding weight determination unit 202 is triggered. Specifically, the real-time position information and real-time weight information of the crane on the target converter charging span can be continuously acquired at fixed time intervals ranging from 0.1 seconds to 0.5 seconds. The shorter the acquisition time interval, the more accurate the final judgment result. This can be selected according to actual needs. It should also be noted that this step specifically obtains the target converter furnace opening location and the preset weight range of the weighing tank. The target converter furnace opening location information is collected offline because this location information is generally fixed. The preset weight range W1 to W2 can be determined based on the overhead crane weighing data from large-scale production, and can be obtained from the converter secondary system. This is because this weight is measured by the overhead crane scale and then transmitted to the converter secondary system. When the difference between the real-time crane location information and the target converter furnace opening location is within the preset location difference range (for example, this preset location difference range can be 1 meter to 3 meters), and the real-time crane weight information is within the preset weight range of the weighing tank... When the measurement range is between W1 and W2, it is determined that the crane has entered the iron-filling stage. It can be seen that combining the two factors of location and weight of the heavy container can ensure that the judgment of whether the iron-filling stage has been entered is more accurate. Moreover, it is possible to further measure whether the duration of this state reaches a certain threshold. For example, if this state lasts for more than 10 seconds, it can more accurately determine that the iron-filling stage has been entered, rather than misjudgment caused by instantaneous weight change. Of course, this time threshold can also be set to be longer, for example, it can be from 10 seconds to 40 seconds. The longer the time threshold, the lower the probability of misjudgment. This can be selected according to actual needs.

[0063] The pre-filling iron tank weight determination unit 202 is used to calculate the standard deviation of the crane weight over a fixed time period based on the real-time weight information of the crane, for a first preset quantity. When the standard deviation of the crane weight meets the first preset condition, the weight of the pre-filling iron tank is determined. It should be noted that the first preset quantity can be no less than 5, and the value range of each fixed time period can be from 2 seconds to 5 seconds. The standard deviation of the crane weight for each fixed time period can be calculated using the following formula:

[0064] ;

[0065] Where σ is the standard deviation of weighing over a fixed time period, in tons, and x iThe instantaneous weighing value is the i-th value obtained within a fixed time period, in tons; The average weighing weight within this fixed time period is expressed in tons. In this case, when the standard deviation of the crane weight meets the first preset condition, the weight of the heavy hopper before iron transfer can be determined as follows: when the standard deviations σ of these crane weights are all not greater than the standard deviation threshold σ1 (σ1 can range from 0.1 to 0.3), and the average weight of each fixed time period is within W1 to W2, then the average crane weight of the last fixed time period is taken as... As the weight of the heavy ladle before iron addition, this stable weight is denoted as W. 重 This effectively eliminates weighing deviations caused by the movement of the semi-steel tank during the iron-filling process, and accurately determines the true weight of the tank.

[0066] The iron loading start time determination unit 203 is used to analyze whether the average crane weight over a fixed time period of the most recent first preset quantity meets the second preset condition. If it does, the iron loading start time is determined. Specifically, it can analyze the average crane weight over a fixed time period of the most recent first preset quantity n1. Whether it is strictly in a continuous decreasing trend, that is, within the first fixed time period in the time sequence ≥The second fixed time period And within the preset weight range of the heavy tank, i.e. If so, then the midpoint of the first fixed time interval will be taken as the start time of iron exchange, denoted as t. 开始 .

[0067] The iron exchange completion time determination unit 204 is used to analyze whether the average crane weight within a fixed time period of the most recent second preset quantity meets the third preset condition. If it does, the iron exchange completion time is determined. Specifically, it can analyze the average crane weight within a fixed time period of the most recent second preset quantity 2n1 (n1≥5). Whether to decrease first and then increase, that is, the fixed time interval from the 1st to the n1st in the time series. It shows a continuous decreasing trend, that is The fixed time interval from the (n1+1)th to the 2n1st time interval within the time series It shows a continuous increasing trend, that is If so, it means that the iron exchange is completed at the last moment of the n1th fixed time period. At this time, the weight of the semi-steel can no longer decrease. At the same time, since the auxiliary hook is disengaged, the upward pulling force that the auxiliary hook originally exerted on the semi-steel can will disappear, and the weighing weight will continue to increase. Therefore, the last moment of the fixed time period in the middle, that is, the last moment of the n1th fixed time period, is taken as the time when the iron exchange is completed, denoted as t. 结束 .

[0068] The empty can weight determination unit 205 after iron filling is used to analyze whether the standard deviation of the crane weight within a fixed time period of the most recent third preset quantity meets the fourth preset condition. If it does, the weight of the empty can after iron filling is determined. Specifically, it can analyze whether the standard deviation σ of the crane weight within a fixed time period of the most recent third preset quantity n1 is not greater than the standard deviation threshold σ1, and whether the average crane weight is within the preset empty can weight range W3 to W4. This preset empty can weight range can be collected offline from the overhead crane weighing data in the large production data. If so, the average crane weight within the first fixed time period is determined. The weight of the empty can after iron mixing is denoted as W. 空 This effectively eliminates weighing deviations caused by the movement of the semi-steel can during the iron-filling process, and accurately determines the true weight of the empty can.

[0069] The unit 206 for determining the weight and time of iron mixing is used to subtract the weight of the empty tank after iron mixing from the weight of the full tank before iron mixing to obtain the weight of iron mixing, and to subtract the start time of iron mixing from the end time of iron mixing to obtain the iron mixing time. Specifically, this can be achieved using the formula W. 兑铁 =W 重 -W 空 Quickly determine the weight of the iron to be added online using the formula T. 兑铁 =t 结束 -t 开始 Quickly determine the iron exchange time online.

[0070] Example of implementing the converter iron-addition parameter determination equipment in semi-steelmaking provided by this invention Figure 3 As shown, Figure 3 This is a schematic diagram of an embodiment of the converter iron-addition parameter determination device in semi-steelmaking provided by the present invention. The device may include:

[0071] Memory 301 is used to store computer programs;

[0072] Processor 302 is used to execute computer programs to implement the steps of the method for determining converter iron addition parameters in semi-steelmaking, as described above.

[0073] In an embodiment of the computer-readable storage medium provided by the present invention, the computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of the method for determining converter iron addition parameters in semi-steelmaking as described above.

[0074] It can be seen that the embodiments of the above-mentioned device, equipment and storage medium provided in this application also have the following advantages: the method of fusion of positioning and weighing data is used to determine whether iron filling has started, thereby avoiding interference from non-iron filling state. Moreover, the sliding standard deviation is used for stable weighing, which effectively eliminates the weight fluctuation caused by crane movement and tank shaking. The start and end time of iron filling can be automatically identified according to the weight trend. The iron filling is completed when the weight first drops and then rises. This identification method is more accurate. Moreover, the same crane can be used for full-process measurement, which can eliminate the deviation of weighing across cranes and is closer to the actual amount fed into the furnace. This method does not require additional hardware and can be directly connected to the existing secondary system, which has the advantages of fast deployment and low cost.

[0075] The above scheme will be explained in detail with a specific example below:

[0076] Taking a 120-ton semi-steelmaking converter as an example, 240 heats of production data were tracked on-site for verification. The iron content W was calculated using the method provided in the above embodiment. 兑铁 With iron exchange time T 兑铁 The calculation results were verified and evaluated based on on-site tracking data.

[0077] The specific steps are explained using furnace 1 as an example. The same steps can be used for other furnaces.

[0078] 1. Data Acquisition: Offline data acquisition: the location of the target semi-steelmaking converter mouth S0=12.5m, the weight range of the semi-steel ladle under full load state 170 tons (W1)~250 tons (W2), and the weight range of the empty ladle state 50 tons (W3)~70 tons (W4); Online real-time data acquisition: the real-time position information s of each crane in the target converter charging span, the real-time weight information w of the crane, and the setting to collect data once every 0.3 seconds.

[0079] 2. Data Processing:

[0080] (2.1) Determine if the crane has entered the iron exchange stage: When the real-time weight information of a crane w∈[170,250] and s∈[11.5,13.5], and the duration of this state is ≥15 seconds, the crane is determined to have entered the iron exchange stage and the process begins (2.2).

[0081] (2.2) Determine the weight of the heavy tank before iron transfer: Based on the real-time weighing data of the crane, calculate the standard deviation σ of the crane weight for 6 (n1) fixed time periods (the duration of the fixed time period is 2 seconds, and the duration of the fixed time period in subsequent steps can also use this value).

[0082] When the σ of the above 6 fixed time periods (n1) is not greater than 0.2(σ1), and the σ of each fixed time period is ∈[170,250], within the last (i.e., the n1th) fixed time period ( =193.2 tons) is the stable weight of the heavy ladle before iron addition, denoted as W. 重 (W 重 = =193.2 tons). This method can effectively eliminate weighing deviations caused by the movement of the semi-steel tank during the iron-filling process and accurately determine the true weight of the tank.

[0083] (2.3) Determine the start time of iron exchange: Calculate and analyze the time within the most recent time series of 6 consecutive (n1) fixed time periods. The results are as follows: =193.1 tons, =189.4 tons, =187.5 tons, =185.6 tons, =184.1 tons, =182.2 tons, which meets the strict continuous decreasing trend, that is ,and If ∈[170,250], then the midpoint of the first fixed time interval (9:00:00) is the start time of iron exchange, denoted as t. 开始 .

[0084] (2.4) Determine the end time of iron exchange: Calculate and analyze the 12 consecutive fixed time periods within the most recent time series. The trend of change was found to simultaneously meet the following conditions:

[0085] ① The fixed time interval from the 1st to the 6th within the time sequence It shows a continuous decreasing trend, that is:

[0086] ,

[0087] in =58.7, =56.2, =54.9, =53.5, =51.8, =50.4;

[0088] ② The 7th to 12th fixed time intervals within the time series It shows a continuous increasing trend, that is:

[0089] ,

[0090] in, .

[0091] This indicates that the iron mixing is completed at the last moment of the 6th fixed time period. At this point, the weight of the semi-steel can no longer decrease, and the weight will continue to increase due to the disengagement of the auxiliary hook. The last moment of the 6th fixed time period (9:02:00) is determined as the moment when the iron mixing is completed, denoted as t. 结束 .

[0092] (2.5) Determine the weight of the empty can:

[0093] Based on real-time crane weighing data, the standard deviation σ of crane weight is calculated for six fixed time periods within the most recent time series. The standard deviation σ for each of these six fixed time periods is no greater than 0.2(σ1), and the standard deviation σ for each fixed time period is... ∈[50,70], then within the first fixed time period (63.1 tons) is the stable weight of the empty tank after the iron has been added, denoted as W. 空 This method can effectively eliminate weighing deviations caused by the movement of the semi-steel can during the iron-filling process, and accurately determine the true weight of the empty can.

[0094] 3. Result Confirmation:

[0095] Based on the above steps, the weight W for iron can be calculated and determined. 兑铁-计算 With iron exchange time T 兑铁-计算 :

[0096] W 兑铁-计算 =W 重 -W 空 =193.2-63.1=130.1 tons;

[0097] T 兑铁-计算 =t 结束 -t 开始 =(9:02:00)-(9:00:00)=2 minutes;

[0098] To verify the accuracy of the calculation, the actual situation of the ferroalloy charging process for this furnace was tracked on-site, and the weight W of the ladle when it was stable before charging was accurately recorded. 重-跟踪 =193.3 tons, the weight W when the empty iron can is stable after filling 空-跟踪 =63.1 tons, iron ore start time t 开始-跟踪 =9:00:02, Iron exchange end time t 结束-跟踪 =9:02:01, then the actual weight W of the iron added to the furnace can be determined. 兑铁-真实 =W 重-跟踪 -W 空-跟踪 =193.3-63.1=130.2 tons, actual iron exchange time T 兑铁-真实 =t 结束-跟踪 -t 开始-跟踪=(9:02:01)-(9:00:02)=1.98 minutes.

[0099] Based on the calculated results and the actual results, the calculation deviation of the method is determined using the following formula:

[0100] ;

[0101] ;

[0102] In the formula, MAE 兑铁重量 MAE 兑铁时间 These represent the weight deviation and time deviation of the iron mixing calculated using this method, respectively. Substituting these data into the formula yields the MAE result. 兑铁重量 =0.1 tons, MAE 兑铁时间 =0.02 minutes.

[0103] Using the same steps described above, data from 300 furnaces were tracked and compared for comparison. It was found that the MAE obtained using this method... 兑铁重量 =0.12 tons, MAE 兑铁时间 =0.04 minutes, while MAE using the traditional method 兑铁重量 =3.2 tons, MAE 兑铁时间 =2.1 minutes, which shows that its deviation is much higher than that of the method in this paper, proving that the method can effectively improve the accuracy of determining the weight and time of iron mixing, and can realize online rapid calculation, thus effectively improving production efficiency.

[0104] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for determining converter ferroalloying parameters in semi-steelmaking, characterized in that, include: Continuously collect real-time position and weight information of the crane on the charging span of the target converter to determine whether the crane has entered the iron dispensing stage; In response to the determination that the crane has entered the iron-filling stage, based on the real-time weight information of the crane, the standard deviation of the crane weight over a fixed time period of the most recent first preset number is calculated. When the standard deviation of the crane weight meets the first preset condition, the weight of the heavy tank before iron filling is determined. Analyze whether the average weight of the cranes over a fixed time period of the first preset quantity meets the second preset condition. If it does, determine the start time of iron exchange. Analyze whether the average weight of the cranes within a fixed time period of the second preset quantity meets the third preset condition. If it does, determine the time when the iron exchange is completed. Analyze whether the standard deviation of the crane weight within a fixed time period of the third preset quantity meets the fourth preset condition. If it does, determine the weight of the empty tank after iron exchange. The weight of the iron-filled container is obtained by subtracting the weight of the empty container after iron filling from the weight of the container before iron filling. The iron filling time is obtained by subtracting the start time of iron filling from the end time of iron filling.

2. The method for determining converter iron addition parameters in semi-steelmaking according to claim 1, characterized in that, When the standard deviation of the crane weight meets the first preset condition, the weight of the heavy hopper before iron transfer is determined as follows: When the standard deviation of the crane weight is not greater than the standard deviation threshold, the average crane weight in the last fixed time period is taken as the weight of the heavy tank before iron filling.

3. The method for determining converter iron addition parameters in semi-steelmaking according to claim 2, characterized in that, The analysis determines whether the average crane weight over a fixed time period of the first preset quantity meets the second preset condition. If it does, the start time for iron exchange is determined as follows: Analyze whether the average crane weight over the most recent fixed time period of the first preset quantity has been continuously decreasing and is within the preset weight range of the heavy tank. If so, the midpoint of the first fixed time period is taken as the start time of the iron exchange.

4. The method for determining converter iron addition parameters in semi-steelmaking according to claim 3, characterized in that, The analysis determines whether the average crane weight over a fixed time period within the second preset quantity meets the third preset condition. If it does, the time when the iron exchange is completed is determined as follows: Analyze whether the average crane weight over a fixed time period within the second preset quantity has decreased first and then increased. If so, take the last moment of the fixed time period in the middle as the moment when the iron exchange is completed.

5. The method for determining converter iron addition parameters in semi-steelmaking according to claim 4, characterized in that, The analysis determines whether the standard deviation of crane weights within a fixed time period of the third preset quantity meets the fourth preset condition. If it does, the weight of the empty ladle after iron mixing is determined as follows: If the standard deviation of the crane weight within the most recent third preset number of fixed time periods is not greater than the standard deviation threshold and the average crane weight within each fixed time period is within the preset empty tank weight range, then the average crane weight within the first fixed time period is taken as the empty tank weight after iron addition.

6. The method for determining converter iron addition parameters in semi-steelmaking according to claim 5, characterized in that, The continuous acquisition of real-time position and weight information of the crane on the target converter charging span, and the determination of whether the crane has entered the ferroload stage, includes: The location of the target converter furnace opening and the preset weight range of the heavy jar are obtained. When the difference between the real-time location information of the crane and the location of the target converter furnace opening is within the preset location difference range, and the real-time weight information of the crane is within the preset weight range of the heavy jar, it is determined that the crane has entered the iron-refilling stage.

7. The method for determining converter iron addition parameters in semi-steelmaking according to claim 6, characterized in that, The real-time position information and real-time weight information of the crane on the charging span of the target converter are continuously collected at fixed time intervals ranging from 0.1 seconds to 0.5 seconds.

8. A device for determining converter ferroalloying parameters in semi-steelmaking, characterized in that, include: The data acquisition and judgment unit is used to continuously acquire the real-time position information and real-time weight information of the crane on the charging span of the target converter, and to determine whether the crane has entered the iron-dispensing stage. When it is determined that the crane has entered the iron-dispensing stage, the pre-iron-dispensing weight determination unit is triggered. The unit for determining the weight of the heavy tank before iron filling is used to calculate the standard deviation of the crane weight over a fixed time period based on the real-time weight information of the crane, and to determine the weight of the heavy tank before iron filling when the standard deviation of the crane weight meets the first preset condition. The unit for determining the start time of iron exchange is used to analyze whether the average weight of cranes over a fixed time period of the first preset quantity meets the second preset condition. If it does, the start time of iron exchange is determined. The unit for determining the completion time of iron exchange is used to analyze whether the average weight of cranes within a fixed time period of the second most recent preset quantity meets the third preset condition. If it does, the completion time of iron exchange is determined. The unit for determining the weight of the empty can after iron mixing is used to analyze whether the standard deviation of the crane weight within a fixed time period of the most recent third preset quantity meets the fourth preset condition. If it does, the weight of the empty can after iron mixing is determined. The iron mixing weight and iron mixing time determination unit is used to subtract the weight of the empty tank after iron mixing from the weight of the heavy tank before iron mixing to obtain the iron mixing weight, and to subtract the iron mixing start time from the iron mixing completion time to obtain the iron mixing time.

9. Equipment for determining converter ferroalloying parameters in semi-steelmaking, characterized in that, include: Memory, used to store computer programs; A processor, configured to execute the computer program to implement the steps of the method for determining converter iron-addition parameters in semi-steelmaking as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the steps of the method for determining converter iron addition parameters in semi-steelmaking as described in any one of claims 1 to 7.

Images