Converter tapping temperature compensation method and system, storage medium and computer equipment

Abstract

The application discloses a converter tapping temperature compensation method, comprising: collecting the time t1 of the molten steel pouring completion moment of the molten steel ladle, the time t1 being the starting time of the standby time of the molten steel ladle; performing a package operation on the molten steel ladle, and hanging the current package molten steel ladle information into a converter production schedule table; based on the current time, regularly updating the current standby time and the heat level of the molten steel ladle, and regularly updating to the converter production schedule table; when the molten steel ladle starts to receive molten steel at the converter station, recording the time t3 of the current time, calculating the current standby time and the current heat level of the molten steel ladle, and updating to the converter production schedule table; based on the converter production schedule table, determining the current molten steel ladle to be tapped, regularly reading the heat level of the molten steel ladle in the converter production schedule table, and determining the tapping temperature of the current production plan heat. The heat loss of the molten steel ladle turnover process is compensated by tracking the heat level in the molten steel ladle turnover process to adjust the tapping temperature of the corresponding heat in real time.

Description

Technical Field

[0001] This invention belongs to the technical field of the metallurgical industry. More specifically, this invention relates to a converter tapping temperature compensation method and system, storage medium and computer equipment. Background Technology

[0002] The molten steel ladle is the conduit for molten steel in the steelmaking-continuous casting process, playing a crucial role in the entire steelmaking process, from converter tapping and refining to continuous casting. Therefore, efficient management of the molten steel ladle can effectively reduce heat loss during transportation and improve steelmaking efficiency.

[0003] Currently, most steel companies do not have a dedicated steel ladle management system. Only a small number of companies have set up some simple functions in the L3 system, including statistics on the number of times the steel ladle is used, statistics on the number of times the nozzle is used, and tracking of the lining condition.

[0004] The aforementioned system cannot effectively and intuitively reflect the thermal state of the molten steel ladle during dynamic turnover, nor can it provide a reference for controlling the converter tapping temperature. Currently, the converter tapping temperature is generally the middle limit of the set tapping temperature range. If the set tapping temperature range is 1650℃~1680℃, then the converter tapping temperature is set to 1665℃. Summary of the Invention

[0005] This invention provides a converter tapping temperature compensation method, which adjusts the tapping temperature of the corresponding heat cycle in real time by tracking the heat level of the molten steel ladle during its turnover process, so as to compensate for the heat loss during the turnover process of the molten steel ladle.

[0006] This invention is implemented as follows: a method for compensating the tapping temperature of a converter, the method comprising the following steps:

[0007] (1) After the molten steel in the steel ladle is poured, the current time t1 is collected and the time t1 is used as the starting time for calculating the waiting time of the corresponding steel ladle.

[0008] (2) After the hot repair is completed, the molten steel ladle is refilled and the information of the molten steel ladle is added to the converter production plan. The information of the molten steel ladle includes: the identification number of the molten steel ladle, the waiting time and the heat grade.

[0009] (3) Based on the current time, update the current standby time T2 of the molten steel ladle and its current heat grade, and update the heat grade of the molten steel ladle in the converter production plan at regular intervals;

[0010] (4) When the molten steel ladle starts receiving molten steel at the converter station, record the current time t3, calculate the current standby time T3 of the molten steel ladle and its current heat grade, and update the heat grade of the molten steel ladle in the converter production plan.

[0011] (5) Based on the converter production plan, determine the molten steel ladle to be tapped, and periodically read the heat grade of the molten steel ladle in the converter production plan to determine the tapping temperature of the current production plan heat.

[0012] Furthermore, when performing the ladle matching operation, the ladle matching time t2 is recorded. Based on the ladle matching time t2, the current waiting time T1 of the ladle is calculated. Based on the waiting time T1, the initial heat grade of the ladle is determined, and the heat grade of the ladle in the converter production plan is updated.

[0013] Furthermore, the waiting time T2 = the current time - the time t1 when the molten steel ladle is completed.

[0014] Furthermore, the heat rating of the molten steel ladle is determined based on the waiting time. The shorter the waiting time, the higher the heat rating of the molten steel ladle. The higher the heat rating of the molten steel ladle, the smaller the compensation temperature value required for the tapping temperature.

[0015] Furthermore, the heat rating of the molten steel ladle is divided into six heat ratings: the first heat rating corresponds to a standby time of 0–60 min, and the converter tapping temperature is below the midpoint of the tapping temperature range; the second heat rating corresponds to a standby time of 60–90 min, and the converter tapping temperature is the midpoint of the tapping temperature range; the third heat rating corresponds to a standby time of 90–120 min, and the converter tapping temperature consists of the midpoint of the tapping temperature range plus a compensation temperature of 5°C; the fourth heat rating corresponds to a standby time of 120–180 min, and the converter tapping temperature consists of the midpoint of the tapping temperature range plus a compensation temperature of 15°C; the fifth heat rating corresponds to a standby time of 180–240 min, and the converter tapping temperature consists of the midpoint of the tapping temperature range plus a compensation temperature of 20°C; the sixth heat rating corresponds to a standby time greater than 240 min, and the converter tapping temperature consists of the midpoint of the tapping temperature range plus a compensation temperature of 25°C.

[0016] The heat rating levels gradually decrease from the first heat rating to the sixth heat rating.

[0017] Furthermore, after step (5), the following is also included:

[0018] (6) In the refining process, steel ladles with higher heat grades should be used preferentially.

[0019] This invention is implemented as follows: a converter tapping temperature compensation system, the system comprising:

[0020] The time acquisition unit, standby time calculation unit, thermal grade determination unit, and steel tapping temperature compensation unit are connected in sequence.

[0021] The time acquisition unit is used to collect the time when the molten steel is poured, when the molten steel ladle is being filled, and when the converter station starts receiving molten steel.

[0022] The standby time calculation unit takes the completion of molten steel collection and casting as the starting time and calculates the standby time from the starting time at the current time periodically.

[0023] The heat rating determination unit determines the current heat rating of the molten steel ladle based on the current standby time.

[0024] The tapping temperature compensation unit determines the tapping temperature of the current production plan heat based on the thermal grade of the molten steel ladle to be tapped.

[0025] Furthermore, the system also includes:

[0026] The storage unit is used to store the converter production plan, which records information about the molten steel ladle, including: the ladle's identification number, waiting time, and heat rating.

[0027] After calculating the waiting time and heat grade of the molten steel ladle in the waiting time calculation unit and heat grade determination unit, the waiting time and heat grade of the corresponding molten steel ladle are updated in the converter production plan table.

[0028] The tapping temperature compensation unit determines the tapping temperature of the current production plan heat based on the ladle heat rating in the converter production schedule.

[0029] The present invention is implemented as follows: a storage medium storing a computer program, characterized in that, when the computer program is executed by a processor, it implements the steps of the converter tapping temperature compensation method as described above.

[0030] The present invention is implemented as follows: a computer device includes a processor and a storage medium storing program code, which, when executed by the processor, implements the steps of the converter tapping temperature compensation method as described above.

[0031] Since the exact time when the molten steel ladle receives molten steel at the converter position cannot be determined in advance, the compensation temperature required for tapping from the converter cannot be determined beforehand. Therefore, the only solution is to periodically update the heat grade of the molten steel ladle in the converter production plan. The process of updating the converter heat grade is essentially a process of continuously increasing the heat grade of the molten steel ladle. As the heat grade of the molten steel ladle increases, the compensation temperature required for tapping from the converter also increases accordingly. When the molten steel ladle begins to receive molten steel, the final heat grade of the molten steel ladle is determined. At this time, the tapping temperature of the converter is close to the tapping temperature required by the final heat grade, thereby improving the accuracy of tapping temperature control. Attached Figure Description

[0032] Figure 1This is a flowchart of a converter tapping temperature compensation method provided in an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the converter tapping temperature compensation system provided in an embodiment of the present invention. Detailed Implementation

[0034] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, so as to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present invention.

[0035] In this embodiment of the invention, the turnover process of the molten steel ladle is as follows: cold repair operation of molten steel ladle, baking operation of molten steel ladle, ladle matching operation of molten steel ladle, molten steel ladle receiving operation at the converter station, molten steel operation at the refining and casting station, and hot repair operation of molten steel ladle.

[0036] Cold Repair of Molten Steel Ladles: The outer shell of the molten steel ladle is a steel structure, requiring the internal lining to be constructed with refractory material. This is the cold repair operation. After lining is completed, a molten steel ladle maintenance plan is selected in the molten steel ladle management system interface. The ladle can be selected as a major repair, minor repair, or medium repair mode, and the type, manufacturer, and actual replacement or repair details of the refractory material for each part of the lining are entered. This completes the cold repair operation. Molten Steel Ladle Baking Operation: Add the molten steel ladle to be baked, select the baking type (online, major repair, minor repair), and choose the baking device number, baking heat, and time. After baking, the system prompts that the next step can be performed. Molten Steel Ladle Receiving Operation at the Converter Station: After hot repair, the molten steel ladle is transported to the converter for receiving molten steel, and argon blowing and temperature measurement are performed before being moved to the appropriate process. Generally, there are two paths: one is to directly hoist it to the continuous casting process, and the other is to first process it in the refining process before hoisting it to the continuous casting process. Molten steel operations at refining and casting stations: After processing, the molten steel is transported in ladles to the refining and casting stations for the corresponding smelting or casting operations. Hot ladle repair operations: After casting, the molten steel ladle is hoisted to the hot repair station for mechanical inspection, refractory replacement of nozzles, and other hot repair operations. After hot repair, if the ladle can continue to be used, it is transferred to the ladle matching operation; if it cannot continue to be used, it is transferred to the cold repair operation.

[0037] Figure 1 The flowchart of the converter tapping temperature compensation method provided in the embodiment of the present invention includes the following steps:

[0038] (1) After the molten steel in the steel ladle is poured, the steel ladle leaves the continuous casting platform, and the current time t1 is collected. Time t1 is used as the start time of the waiting time of the corresponding steel ladle.

[0039] (2) The molten steel ladle that leaves the continuous casting table enters the hot repair station. After the hot repair is completed, the molten steel ladle is matched with a ladle. The matching time t2 of the molten steel ladle is recorded. The information of the molten steel ladle currently matched with a ladle is added to the converter production plan table. The information of the molten steel ladle includes: the identification number of the molten steel ladle, the waiting time and the heat grade.

[0040] (3) Calculate the current waiting time T1 of the molten steel ladle based on the ladle's ladle feeding time t2, determine the current heat level of the molten steel ladle based on the waiting time T1, and upload the current heat level of the molten steel ladle to the converter's production plan table. Update the heat level of the molten steel ladle in the converter's production plan table regularly.

[0041] In this embodiment of the invention, the waiting time T1 of the molten steel ladle = the ladle preparation time t2 - the time t1 after the molten steel ladle casting is completed. The specific method for classifying the thermal grade of the molten steel ladle based on the waiting time is as follows:

[0042] The heat rating of the molten steel ladle is determined based on the waiting time T1. The shorter the waiting time T1, the higher the heat rating of the molten steel ladle. The longer the waiting time, the lower the heat rating of the molten steel ladle. The higher the heat rating of the molten steel ladle, the less heat loss it will have.

[0043] In this embodiment of the invention, molten steel ladles are divided into continuous turnover molten steel ladles and intermittent turnover molten steel ladles. Continuous turnover molten steel ladles are molten steel ladles that enter the converter process directly after continuous casting is completed and they leave the continuous casting table without baking. Intermittent turnover molten steel ladles are molten steel ladles that need to be baked after continuous casting is completed and then enter the molten steel ladle matching operation.

[0044] Based on this, the standby time for continuously circulating molten steel ladles is the period from the moment they leave the continuous casting platform to the moment they begin receiving molten steel at the converter station. The standby time for intermittently circulating molten steel ladles consists of two parts: the period from leaving the continuous casting platform to the start of baking and the baking time. Since the time for molten steel ladles to receive molten steel at the converter station is already arranged, the converter production plan records the time for each molten steel ladle to receive molten steel at the converter station. When the time from leaving the continuous casting platform to the start of baking is determined, if the baking time (converter station molten steel receiving time - baking start time) is short, the set baking time is (converter station molten steel receiving time - baking start time) / 2 to minimize the risk of a decrease in the heat grade of the molten steel ladle. When the baking time is long, the set baking time is the calculated baking time.

[0045] (4) Update the current standby time T2 and the current heat grade of the molten steel ladle regularly, and upload them to the converter production plan. Update the heat grade of the molten steel ladle in the converter production plan regularly.

[0046] In this embodiment of the invention, the waiting time T2 = the current time - the time t1 when the molten steel ladle is completed.

[0047] (5) When the molten steel ladle starts receiving molten steel at the converter station, record the time t3 when the molten steel ladle starts receiving molten steel, update the current standby time T3 and the current heat grade of the molten steel ladle, and upload it to the converter production plan table, update the current heat grade of the molten steel ladle in the converter production plan table, stop updating the heat grade of the molten steel ladle in the converter production plan table, and obtain the final heat grade of the current molten steel ladle.

[0048] The waiting time T3 = the time t3 when the molten steel ladle is filled with molten steel - the time t1 when the molten steel ladle is completed.

[0049] (6) The converter determines the molten steel ladle to be tapped based on the converter production plan, and reads the heat grade of the molten steel ladle in the converter production plan at regular intervals. The converter then determines the tapping temperature of the current production plan heat.

[0050] In this embodiment of the invention, the higher the thermal grade of the molten steel ladle, the lower the compensation temperature required for the tapping temperature of the converter. This invention divides the thermal grade of the molten steel ladle into six grades, including the first thermal grade to the sixth thermal grade, with the thermal grade gradually decreasing from the first thermal grade to the sixth thermal grade, as detailed below:

[0051] The standby time for the first thermal level is 0–60 min, and the converter tapping temperature is below the midpoint of the set tapping temperature range; the standby time for the second thermal level is 60–90 min, and the converter tapping temperature is the midpoint of the set tapping temperature range; the standby time for the third thermal level is 90–120 min, and the converter tapping temperature is 5°C above the midpoint of the set tapping temperature range; the standby time for the fourth thermal level is 120–180 min, and the converter tapping temperature is 15°C above the midpoint of the set tapping temperature range; the standby time for the fifth thermal level is 180–240 min, and the converter tapping temperature is 20°C above the midpoint of the set tapping temperature range; the standby time for the sixth thermal level is greater than 240 min, and the converter tapping temperature is 25°C above the midpoint of the set tapping temperature range.

[0052] Since the exact time when the molten steel ladle receives molten steel at the converter position cannot be determined in advance, the compensation temperature required for tapping from the converter cannot be determined beforehand. Therefore, the only solution is to periodically update the heat grade of the molten steel ladle in the converter production plan. The process of updating the converter heat grade is essentially a process of continuously increasing the heat grade of the molten steel ladle. As the heat grade of the molten steel ladle increases, the compensation temperature required for tapping from the converter also increases accordingly. When the molten steel ladle begins to receive molten steel, the final heat grade of the molten steel ladle is determined. At this time, the tapping temperature of the converter is close to the tapping temperature required by the final heat grade, thereby improving the accuracy of tapping temperature control.

[0053] (7) In the refining process, steel ladles with higher heat ratings should be used preferentially;

[0054] In this embodiment of the invention, since the heat loss of a steel ladle is less when the heat rating is higher, the temperature of the molten steel in the ladle is closer to the set temperature value after the refining process or continuous casting process. Therefore, under the condition that the usage conditions are met, steel ladles with higher heat ratings are given priority for turnover.

[0055] In this embodiment of the invention, the molten steel ladle information in the converter production schedule also includes: steel grade. Different steel grades have different molten steel compositions. The molten steel produced by different converters may have different compositions. Different continuous casting production lines may produce continuous casting billets of different steel grades. Therefore, the molten steel ladle is transferred to the converter station of the corresponding steel grade to receive molten steel. After receiving the molten steel, the molten steel ladle is transferred to the continuous casting machine of the corresponding steel grade for molten steel casting.

[0056] Figure 2 This is a schematic diagram of the converter tapping temperature compensation system provided in an embodiment of the present invention. For ease of explanation, the part related to the embodiment of the present invention is shown. The system includes:

[0057] The system consists of a time acquisition unit, a standby time calculation unit, a thermal grade determination unit, and a tapping temperature compensation unit, connected sequentially. The time acquisition unit collects data when molten steel is poured, when the molten steel ladle is being prepared, and when the converter station begins receiving molten steel. The standby time calculation unit calculates the standby time from the time the molten steel pouring is completed, using the completion time as the starting point. The thermal grade determination unit determines the current thermal grade of the molten steel ladle based on the current standby time. The tapping temperature compensation unit determines the tapping temperature for the current planned heat based on the thermal grade of the molten steel ladle to be tapped.

[0058] In this embodiment of the invention, the system further includes: a storage unit for storing a converter production plan, which records information about molten steel ladles, including: the ladle's identification number, waiting time, and heat rating; after the waiting time calculation unit and heat rating determination unit calculate the waiting time and heat rating of the molten steel ladles each time, they update the corresponding waiting time and heat rating of the molten steel ladles in the converter production plan; and a tapping temperature compensation unit determines the tapping temperature of the current production plan heat based on the heat rating of the molten steel ladles in the converter production plan.

[0059] The embodiments of this application provide a storage medium storing a computer program, which, when executed by a processor, implements the steps of the converter tapping temperature compensation method described above.

[0060] The embodiments of this application provide a computer device, including a processor and a storage medium storing program code. When the program code is executed by the processor, it implements the steps of the converter tapping temperature compensation method described above.

[0061] The present invention has been described by way of example. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention, or the direct application of the inventive concept and technical solution of the present invention to other occasions without modification, are all within the protection scope of the present invention.

Claims

1. A method for compensating the tapping temperature of a converter, characterized in that, The method includes the following steps: (1) After the molten steel in the ladle has been poured, the current time is collected. t 1 , time t 1 As the starting time for the standby time of the molten steel ladle; (2) Perform the steel ladle matching operation and add the information of the steel ladle currently matched to the converter production plan. The steel ladle information includes: steel ladle identification number, waiting time and heat grade; (3) Based on the current time, update the current standby time T2 of the molten steel ladle and its current heat grade, and update the heat grade of the molten steel ladle in the converter production plan table at regular intervals; (4) Record the time when the molten steel ladle begins to receive molten steel at the converter station. t 3 Calculate the current standby time T3 of the molten steel ladle and its current heat grade, and update the heat grade of the molten steel ladle in the converter production plan. (5) Based on the converter production plan, determine the molten steel ladle to be tapped, and periodically read the heat grade of the molten steel ladle in the converter production plan to determine the tapping temperature of the current production plan heat. The heat rating of the molten steel ladle is determined based on the waiting time. The shorter the waiting time, the higher the heat rating of the molten steel ladle. The higher the heat rating of the molten steel ladle, the smaller the compensation temperature value required for the tapping temperature. The molten steel ladle is classified into six thermal grades: Grade 1 (0-60 min) and Grade 6 (60-90 min). Grade 1 has a standby time of 0-60 min, and the tapping temperature is below the midpoint of the tapping temperature range. Grade 2 has a standby time of 60-90 min, and the tapping temperature is the midpoint of the tapping temperature range. Grade 3 has a standby time of 90-120 min, and the tapping temperature is composed of the midpoint of the tapping temperature range plus a compensation temperature of 5°C. Grade 4 has a standby time of 120-180 min, and the tapping temperature is composed of the midpoint of the tapping temperature range plus a compensation temperature of 15°C. Grade 5 has a standby time of 180-240 min, and the tapping temperature is composed of the midpoint of the tapping temperature range plus a compensation temperature of 20°C. Grade 6 has a standby time greater than 240 min, and the tapping temperature is composed of the midpoint of the tapping temperature range plus a compensation temperature of 25°C. The heat rating levels gradually decrease from the first heat rating to the sixth heat rating.

2. The converter tapping temperature compensation method as described in claim 1, characterized in that, When performing ladle matching operations, record the ladle matching time. t 2 Based on the ladle dispensing time t 2 Calculate the current standby time T1 of the molten steel ladle, determine the initial heat grade of the molten steel ladle based on the standby time T1, and update the heat grade of the molten steel ladle in the converter production plan.

3. The converter tapping temperature compensation method as described in claim 1, characterized in that, The waiting time T2 = the current time - the time t1 when the molten steel ladle is completed.

4. The converter tapping temperature compensation method as described in claim 1, characterized in that, Following step (5): (6) In the refining process, steel ladles with higher heat grades should be used preferentially.

5. A converter tapping temperature compensation system, characterized in that, The system includes: The time acquisition unit, standby time calculation unit, thermal grade determination unit, and steel tapping temperature compensation unit are connected in sequence. The time acquisition unit is used to collect the time when the molten steel is poured, when the molten steel ladle is being filled, and when the converter station starts receiving molten steel. The standby time calculation unit takes the completion of molten steel collection and casting as the starting time and calculates the standby time from the starting time at the current time periodically. The heat rating determination unit determines the current heat rating of the molten steel ladle based on the current standby time. The tapping temperature compensation unit determines the tapping temperature of the current production plan heat based on the thermal grade of the molten steel ladle to be tapped.

6. The converter tapping temperature compensation system as described in claim 5, characterized in that, The system also includes: The storage unit is used to store the converter production plan, which records information about the molten steel ladle, including: the ladle's identification number, waiting time, and heat rating. After calculating the waiting time and heat grade of the molten steel ladle in the waiting time calculation unit and heat grade determination unit, the waiting time and heat grade of the corresponding molten steel ladle are updated in the converter production plan table. The tapping temperature compensation unit determines the tapping temperature of the current production plan heat based on the ladle heat rating in the converter production schedule.

7. A storage medium storing a computer program, characterized in that, When the computer program is executed by the processor, it implements the steps of the converter tapping temperature compensation method as described in any one of claims 1 to 4.

8. A computer device comprising a processor and a storage medium storing program code, wherein when executed by the processor, the program code implements the steps of the converter tapping temperature compensation method as described in any one of claims 1 to 4.

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