Calculation method, system and equipment for maximum addition amount of ladle scrap steel and medium

Abstract

The invention relates to the technical field of blast furnace smelting, in particular to a calculation method, system, equipment and medium for the maximum addition amount of ladle scrap steel, and the calculation method comprises the following steps: (1) obtaining the temperature T1 of molten iron to a pretreatment station required by steelmaking smelting variety steel and the average transportation temperature drop in the time period from ladle iron receiving to the pretreatment station; (2) calculating the lowest temperature before molten iron transportation which contains temperature loss in the molten iron transportation process and meets the temperature requirement of molten iron to a pretreatment station; (3) calculating heat released when the temperature of the molten iron drops to the lowest temperature before molten iron transportation; and (4) calculating the maximum addition amount of the scrap steel according to the heat obtained in the step (3). According to the method, the heat released when the temperature of the molten iron drops to the lowest temperature is equal to the heat required by the maximum scrap steel amount capable of being molten, the molten iron transportation temperature drop is combined with the pretreatment temperature requirement, the scrap steel adding amount is accurately controlled through heat balance, and the situation that steelmaking is affected due to the too low temperature of the molten iron caused by too much scrap steel is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of blast furnace smelting, and in particular to a method, system, equipment and medium for calculating the maximum amount of scrap steel added to a molten iron ladle. Background Art

[0002] The carbon emissions generated by the blast furnace ironmaking process account for about 80% of the entire steel production process. Low-carbon and efficient smelting in blast furnaces is the key to promoting energy conservation and emission reduction in the steel industry. The blast furnace ironmaking process achieves the purpose of increasing production and reducing consumption by adding scrap steel to the molten iron ladle. However, the existing method for calculating the amount of scrap steel added to the molten iron ladle has significant defects. For example, Chinese invention patent application CN 117568549 A discloses a method for optimizing the amount of molten iron and scrap steel charged into a large converter. Although this method is based on material balance and heat balance calculations, it only focuses on the temperature change of the molten pool in the converter, and does not consider the temperature drop constraint of the molten iron during transportation to the pretreatment station. As a result, the calculation of the amount of scrap steel added is not coupled with the temperature requirements of the molten iron when it arrives at the pretreatment station. In actual application, the subsequent process may be affected by the excessively low temperature of the molten iron. In addition, this method only designs a model for the material reaction in the converter, and cannot be applied to the molten iron ladle scenario, and has application scenario limitations.

[0003] Another example is Chinese invention patent application CN 117875992 A, which discloses a method for determining the amount of scrap steel to be added to a torpedo tank. This technical solution is based on the long-process smelting process adopted by most steel companies, which is centered on a blast furnace-torpedo tank (mixing furnace)-converter. Since the mixing furnace can mix the molten iron composition and temperature well, the impact of adding scrap steel to the molten iron tank on the molten iron temperature is reduced. Therefore, when calculating the amount of scrap steel to be added, it is more important to consider maximizing benefits.

[0004] However, this traditional hot metal transportation technology suffers from high energy consumption, poor three-removal effects, large initial investments, and high operating costs. Many steel companies are now adopting a "single-ladle" hot metal transportation method. This involves using a single ladle (tank) to receive, transport, buffer, pre-treat, add iron to the converter, and keep the hot metal warm. After undergoing the necessary process steps, hot metal from the blast furnace is added directly to the converter without changing the ladle. This transportation method eliminates the mixing furnace, simplifies production processes, and accelerates production. However, it also places higher demands on hot metal quality, particularly its temperature at the pre-treatment station. The amount of scrap added to the ladle is the primary factor affecting hot metal temperature. Excessive scrap can result in a low temperature at the pre-treatment station, impacting steelmaking production.

[0005] Based on this, it is necessary to establish a method for calculating the maximum amount of scrap steel added to molten iron that is suitable for the "one-bag-through" molten iron transportation technology. Summary of the Invention

[0006] In response to the technical problems in the prior art of not considering the effect of scrap steel addition on molten iron temperature and the temperature drop during molten iron transportation when calculating the amount of scrap steel added to a ladle, the present invention provides a method, system, equipment and medium for calculating the maximum amount of scrap steel added to a ladle. The method takes the temperature drop during molten iron transportation and the pretreatment temperature requirements into consideration, and uses the principle of heat conservation to calculate the maximum amount of scrap steel added. This method can not only ensure the temperature of the molten iron and avoid the low temperature of the molten iron caused by excessive scrap steel that affects steelmaking, but also make full use of the heat of the molten iron to increase efficiency.

[0007] The technical solutions of the present invention are as follows: In a first aspect, the present invention provides a method for calculating the maximum amount of scrap steel added to a ladle, comprising the following steps: (1) Obtain the required temperature T1 of the molten iron to the pretreatment station for the steelmaking and smelting varieties, and the average transportation temperature drop △T during the period from the molten iron ladle receiving the iron to the pretreatment station; (2) Calculate the lowest temperature T3 before molten iron transportation, which includes the temperature loss during molten iron transportation and meets the temperature requirements of the molten iron to the pretreatment station, T3 = T1 + △T; (3) Calculate the heat Q released when the molten iron temperature T drops to the lowest temperature T3 before molten iron transportation; (4) Calculate the maximum amount of scrap steel added m2 based on the heat Q obtained in step (3).

[0008] Furthermore, in step (1), the temperature T1 of the molten iron required for the steelmaking and smelting of the steel type is determined according to the process when it reaches the pretreatment station.

[0009] Furthermore, in step (1), the average transportation temperature drop ΔT during the period from the time when the molten iron ladle receives the iron to the pretreatment station is obtained by averaging the temperature drops of the molten iron of historical heats of the same type of steel in the period from the time when the molten iron ladle receives the iron to the pretreatment station.

[0010] Furthermore, the number of historical heats is not less than 20.

[0011] Furthermore, in step (3), the heat Q is calculated according to the formula Q = m1 × Cp1 × (T-T3); Where m1 is the weight of molten iron in the ladle, in kg. Cp1 is the average heat capacity of liquid iron, in kJ / (kg·℃), T is the molten iron temperature in °C.

[0012] Furthermore, in step (3), the molten iron temperature T refers to the molten iron temperature measured in the molten iron ditch.

[0013] Furthermore, in step (4), the maximum amount of scrap steel added m2 is calculated according to the formula Q=m2×[Cp2×(T4-T2)+q]; Where Cp2 is the average heat capacity of solid scrap steel, in kJ / (kg·℃), T4 is the melting point of scrap steel, in °C. T2 is the temperature before scrap steel is added, in °C. q is the latent heat of melting of scrap steel, in kJ / kg.

[0014] In a second aspect, the present invention provides a system for calculating the maximum amount of scrap steel added to a ladle, which is used to implement the above-mentioned calculation method, comprising: The parameter input module is used to obtain the user-inputted required temperature T1 of the molten iron at the pretreatment station and the average transportation temperature drop △T during the period from the molten iron ladle receiving the iron to the pretreatment station; The module for calculating the minimum temperature of molten iron before transportation is used to calculate the minimum temperature of molten iron T3 based on the temperature T1 of the molten iron at the pretreatment station required by the steelmaking and smelting varieties and the average transportation temperature drop △T during the period from the molten iron ladle to the pretreatment station; The molten iron temperature detection module is used to obtain the molten iron temperature T before adding scrap steel; Heat calculation module, used to calculate the released heat Q based on the molten iron temperature T and the lowest temperature T3 before the molten iron is transported; The maximum amount of scrap steel added is calculated using a module for calculating the maximum amount of scrap steel added m2 based on the heat Q.

[0015] In a third aspect, the present invention provides an electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor is configured to implement the steps of the method for calculating the maximum amount of scrap steel to be added to the ladle when executing the computer program.

[0016] In a fourth aspect, the present invention further provides a storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method for calculating the maximum amount of scrap steel added to the ladle.

[0017] The beneficial effects of the present invention are: The method for calculating the maximum amount of scrap steel added to a ladle, provided by the present invention, can, on the one hand, control the extent of the drop in molten iron temperature, thereby preventing the impact of excessive temperature drops on steelmaking production; and, on the other hand, reduce heat waste caused by insufficient scrap steel addition. This method can ensure that the molten iron quality meets the requirements for steelmaking and smelting high-quality steel, thereby achieving high-quality steel smelting efficiency. DETAILED DESCRIPTION

[0018] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described below. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work should fall within the scope of protection of the present invention.

[0019] A method for calculating the maximum amount of scrap steel added to a ladle comprises the following steps: (1) Obtain the required temperature T1 of the molten iron to the pretreatment station for the steelmaking and smelting varieties, and the average transportation temperature drop △T during the period from the molten iron ladle receiving the iron to the pretreatment station; (2) Calculate the lowest temperature T3 before molten iron transportation, which includes the temperature loss during molten iron transportation and meets the temperature requirements of the molten iron to the pretreatment station, T3 = T1 + △T; (3) Calculate the heat Q released when the molten iron temperature T drops to the lowest temperature T3 before molten iron transportation; (4) Calculate the maximum amount of scrap steel added m2 based on the heat Q obtained in step (3).

[0020] In some specific embodiments, in step (1), the temperature T1 of the molten iron required for steelmaking and smelting the steel type is determined according to the process when it arrives at the pretreatment station.

[0021] In some specific embodiments, in step (1), the average transportation temperature drop ΔT during the period from the time the molten iron ladle is connected to the pretreatment station is obtained by averaging the temperature drops of molten iron in historical heats of the same type of steel produced during the period from the time the molten iron ladle is connected to the pretreatment station.

[0022] In some specific embodiments, the number of historical heats is no less than 20, preferably 50 to 100.

[0023] In some specific embodiments, in step (3), the heat Q is calculated according to the formula Q=m1×Cp1×(T-T3); Where m1 is the weight of molten iron in the ladle, in kg. Cp1 is the average heat capacity of liquid iron, in kJ / (kg·℃), T is the molten iron temperature in °C.

[0024] In some specific embodiments, in step (3), the molten iron temperature T refers to the molten iron temperature measured in the molten iron ditch. When detecting the molten iron temperature, commonly used molten iron temperature detection methods such as thermocouple temperature measurement, infrared temperature measurement, colorimetric temperature measurement or optical fiber temperature measurement can be used. Among them, the thermocouple temperature measurement method usually uses a high-temperature resistant thermocouple sensor directly inserted into the surface or shallow layer of the molten iron in the molten iron ditch, uses the Seebeck effect to convert the temperature difference into an electric potential signal, and displays the temperature in real time after signal processing. The infrared temperature measurement method uses an infrared thermometer fixedly installed above the molten iron ditch to receive infrared radiation energy from the surface of the molten iron ditch, and then calculates the temperature through spectral filtering, photoelectric conversion and blackbody radiation formula. The colorimetric temperature measurement method is a method of determining the molten iron temperature by measuring the radiation brightness ratio of the molten iron at two different wavelengths, which can eliminate the absorption influence of intermediate media such as smoke and dust. The optical fiber temperature measurement method uses a high-temperature resistant optical fiber probe to transmit the thermal radiation signal of the molten iron, combines it with spectral analysis technology to calculate the temperature, and has the advantages of being resistant to electromagnetic interference and metal vapor corrosion. In actual production, appropriate temperature measuring equipment and methods can be selected according to the specific working conditions of the iron ditch and the measurement accuracy, response speed and equipment life.

[0025] In some specific embodiments, in step (4), the maximum amount of scrap steel added m2 is calculated according to the formula Q=m2×[Cp2×(T4-T2)+q]; Where Cp2 is the average heat capacity of solid scrap steel, in kJ / (kg·℃), T4 is the melting point of scrap steel, in °C. T2 is the temperature before scrap steel is added, in °C. q is the latent heat of melting of scrap steel, in kJ / kg.

[0026] Example 1 A method for calculating the maximum amount of scrap steel added to a ladle comprises the following steps: (1) According to the process, obtain the molten iron temperature T1 required by the steelmaking and smelting varieties to the pretreatment station; Based on historical heat data, the average transport temperature drop ΔT from the time the molten iron ladle receives the iron to the pretreatment station is obtained; (2) Calculate the lowest temperature T3 before molten iron transportation, which includes the temperature loss during molten iron transportation and meets the temperature requirements of the molten iron to the pretreatment station, T3 = T1 + △T; (3) Calculate the heat Q released when the molten iron temperature T drops to the lowest temperature T3 before molten iron transportation, Q = m1 × Cp1 × (T-T3); Where m1 is the weight of molten iron in the ladle, in kg. Cp1 is the average heat capacity of liquid iron, in kJ / (kg·℃), T is the molten iron temperature measured in the molten iron ditch, in °C; (4) Calculate the maximum amount of scrap steel added m2 based on the heat Q obtained in step (3), and the calculation formula is Q = m2 × [Cp2 × (T4-T2) + q]; Where Cp2 is the average heat capacity of solid scrap steel, in kJ / (kg·℃), T4 is the melting point of scrap steel, in °C. T2 is the temperature before scrap steel is added, in °C. q is the latent heat of melting of scrap steel, in kJ / kg.

[0027] Example 2 When adding unheated scrap steel to a 210t hot metal ladle, the maximum amount of scrap steel to be added is calculated as follows: According to the process, it is first determined that the temperature T1 of the molten iron required by the steelmaking smelting variety when it arrives at the pretreatment station must meet the requirement of ≥1380℃; the average transportation temperature drop △T=70℃ during the period from the molten iron ladle receiving iron (without adding scrap steel) to the pretreatment station in the latest 50 heats of this steelmaking smelting variety is retrieved; and the minimum temperature of the molten iron before transportation, which includes the temperature loss during the molten iron transportation process and meets the temperature requirement of the molten iron to the pretreatment station, is calculated to be T3=T1+△T=1450℃.

[0028] 20 minutes after the taphole was opened and iron was discharged, the molten iron temperature T was measured in the molten iron ditch to be 1523℃, and the molten iron volume m1 in the molten iron ladle was 180.4t.

[0029] According to the formula Q=m1×Cp1×(T-T3), where Cp1 is the average heat capacity of liquid iron, and using empirical data, taking 0.837kJ / kg·℃, it is calculated that the heat that can be released when the molten iron temperature T drops to the lowest temperature T3 before molten iron transportation is Q=180.4×1000×0.837×(1523-1450)=11022620.4kJ.

[0030] The heat Q that can be released when the molten iron temperature T drops to the lowest temperature T3 before the molten iron is transported is the heat that can be used to melt the scrap steel. Therefore, the maximum amount of scrap steel added m2 can be calculated according to the formula Q=m2×[Cp2×(T4-T2)+q], where Cp2 is the average heat capacity of solid scrap steel, empirical data is used according to the material type, and 0.7kJ / kg·℃ is taken. T4 is the melting point of the scrap steel. This embodiment only considers the influence of the main element C on the melting point, T4=pure iron melting point-100C%=1536-2.5×100=1286℃, T2 is the temperature before the scrap steel is added, taking room temperature as 25℃, q is the latent heat of fusion of the scrap steel, taking 272kJ / kg, and substituting the values ​​of each parameter into the formula to obtain m2=9545.9kg=9.5t.

[0031] Production was carried out according to the calculation results. 8.8t of scrap steel was actually added. The temperature of the molten iron arriving at the pretreatment station was detected to be 1390℃, which met the requirements for steelmaking production.

[0032] According to the same calculation method and formula parameter values ​​as in this embodiment, the maximum amount of scrap steel added in the production of other tank numbers is calculated, and the results are shown in Table 1 below.

[0033] Table 1 Other applications of the method for calculating the maximum amount of scrap steel added to the ladle of the present invention

[0034] When the maximum scrap addition calculated according to the present invention is compared with the actual scrap addition, if the actual scrap addition exceeds the maximum amount, the ladle temperature drop is too low, falling below the molten iron temperature requirement for steelmaking production, and supplemental heating measures are required. If the actual scrap addition is less than the maximum amount, the ladle temperature drop is properly controlled, meeting the molten iron temperature requirement for steelmaking production.

[0035] The following is an embodiment of a system for calculating the maximum amount of scrap steel added to a ladle provided by an embodiment of the present invention. The calculation system and the calculation method for the maximum amount of scrap steel added to a ladle in the above-mentioned embodiments belong to the same inventive concept. For details not fully described in the embodiment of the calculation system for the maximum amount of scrap steel added to a ladle, please refer to the embodiment of the calculation method for the maximum amount of scrap steel added to a ladle described above.

[0036] The calculation system for the maximum amount of scrap added to the ladle includes: The parameter input module is used to obtain the user-inputted required temperature T1 of the molten iron at the pretreatment station and the average transportation temperature drop △T during the period from the molten iron ladle receiving the iron to the pretreatment station; The module for calculating the minimum temperature of molten iron before transportation is used to calculate the minimum temperature of molten iron T3 based on the temperature T1 of the molten iron at the pretreatment station required by the steelmaking and smelting varieties and the average transportation temperature drop △T during the period from the molten iron ladle to the pretreatment station; The molten iron temperature detection module is used to obtain the molten iron temperature T before adding scrap steel; Heat calculation module, used to calculate the released heat Q based on the molten iron temperature T and the lowest temperature T3 before the molten iron is transported; The maximum amount of scrap steel added is calculated using a module for calculating the maximum amount of scrap steel added m2 based on the heat Q.

[0037] The calculation system of the maximum amount of scrap steel added to the ladle of this embodiment is used to implement a method for calculating the maximum amount of scrap steel added to the ladle, and the steps include: (1) Obtain the required temperature T1 of the molten iron to the pretreatment station for the steelmaking and smelting varieties, and the average transportation temperature drop △T during the period from the molten iron ladle receiving the iron to the pretreatment station; (2) Calculate the lowest temperature T3 before molten iron transportation, which includes the temperature loss during molten iron transportation and meets the temperature requirements of the molten iron to the pretreatment station, T3 = T1 + △T; (3) Calculate the heat Q released when the molten iron temperature T drops to the lowest temperature T3 before molten iron transportation; (4) Calculate the maximum amount of scrap steel added m2 based on the heat Q obtained in step (3).

[0038] The present invention provides an electronic device for implementing various embodiments of the present invention, including a memory, a processor, and a computer program stored in the memory and executable on the processor. The processor is configured to implement the steps of the method for calculating the maximum amount of scrap steel added to the ladle when executing the computer program.

[0039] The electronic device includes, but is not limited to, components such as a processor and a memory. Those skilled in the art will appreciate that the electronic device structure described in the embodiments of the present invention does not limit the electronic device, and that the electronic device may include more or fewer components, or combine certain components, or have different component arrangements.

[0040] In the embodiments of the present invention, electronic devices include, but are not limited to, laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. Electronic devices may also represent various forms of mobile devices and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the embodiments of the present invention described and / or claimed herein.

[0041] In embodiments of the present invention, the processor may be implemented using at least one of a special purpose integrated circuit, a digital signal processor, a digital signal processing device, a processor, a controller, a microcontroller, a microprocessor, or an electronic unit designed to perform the functions described herein. In some cases, such an implementation may be implemented in a controller. For software implementation, implementations such as processes or functions may be implemented with separate software modules that allow execution of at least one function or operation. The software code may be implemented by a software application written in any appropriate programming language, which may be stored in a memory and executed by a controller.

[0042] In addition, the electronic device includes some functional modules not shown, which will not be described here.

[0043] Those skilled in the art will appreciate that various aspects of the electronic device provided by the present invention may be implemented as a system, method, or program product. Therefore, various aspects of the present invention may be implemented in the following forms: entirely in hardware, entirely in software (including firmware, microcode, etc.), or in a combination of hardware and software, collectively referred to herein as "circuits," "modules," or "systems."

[0044] The present invention also provides a storage medium storing a computer program that, when executed by a processor, implements the steps of the aforementioned method for calculating the maximum amount of scrap steel to be added to a ladle. In some possible implementations, various aspects of the present invention may also be implemented as a program product comprising program code. When the program product is executed on a terminal device, the program code is configured to cause the terminal device to execute the steps according to various exemplary embodiments of the present invention described in the "Exemplary Methods" section above.

[0045] The storage medium may be any combination of one or more readable media. The readable medium may be a readable signal medium or a readable storage medium. The readable storage medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or component, or any combination thereof. More specific examples of readable storage media include: an electrical connection having one or more wires, a portable disk, a hard disk, a random access memory, a read-only memory, an erasable programmable read-only memory, an optical fiber, a portable compact disk read-only memory, an optical storage device, a magnetic storage device, or any suitable combination thereof.

[0046] Although the present invention has been described in detail by way of preferred embodiments, the present invention is not limited thereto. Without departing from the spirit and substance of the present invention, persons of ordinary skill in the art may make various equivalent modifications or substitutions to the embodiments of the present invention, and such modifications or substitutions shall be within the scope of the present invention. Any changes or substitutions that can be readily conceived by persons skilled in the art within the technical scope disclosed in the present invention shall be within the scope of protection of the present invention.

Claims

1. A method for calculating the maximum amount of scrap steel added to a ladle, characterized in that: The steps include: (1) Obtain the required temperature T1 of the molten iron to the pretreatment station for the steelmaking and smelting varieties, and the average transportation temperature drop △T during the period from the molten iron ladle receiving the iron to the pretreatment station; (2) Calculate the lowest temperature T3 before molten iron transportation, which includes the temperature loss during molten iron transportation and meets the temperature requirements of the molten iron to the pretreatment station, T3 = T1 + △T; (3) Calculate the heat Q released when the molten iron temperature T drops to the lowest temperature T3 before molten iron transportation; (4) Calculate the maximum amount of scrap steel added m2 based on the heat Q obtained in step (3).

2. The method for calculating the maximum amount of scrap steel added to a ladle according to claim 1, wherein: In step (1), the temperature T1 of the molten iron required for the steelmaking and smelting of the steel type is determined according to the process when it reaches the pretreatment station.

3. The method for calculating the maximum amount of scrap steel added to a ladle according to claim 1, wherein: In step (1), the average transportation temperature drop ΔT during the period from the time when the molten iron ladle receives the iron to the pretreatment station is obtained by calculating the average temperature drop of the molten iron of the same type of steel in the historical heats of steelmaking during the period from the time when the molten iron ladle receives the iron to the pretreatment station.

4. The method for calculating the maximum amount of scrap steel added to a ladle according to claim 3, wherein: The number of historical heats shall not be less than 20.

5. The method for calculating the maximum amount of scrap steel added to a ladle according to claim 1, wherein: In step (3), the heat Q is calculated according to the formula Q = m1 × Cp1 × (T-T3); Where m1 is the weight of molten iron in the ladle, in kg. Cp1 is the average heat capacity of liquid iron, in kJ / (kg·℃), T is the molten iron temperature in °C.

6. The method for calculating the maximum amount of scrap steel added to a ladle according to claim 1 or 5, wherein: In step (3), the molten iron temperature T refers to the molten iron temperature measured in the molten iron ditch.

7. The method for calculating the maximum amount of scrap steel added to a ladle according to claim 1, wherein: In step (4), the maximum amount of scrap steel added, m2, is calculated according to the formula Q=m2×[Cp2×(T4-T2)+q]; Where Cp2 is the average heat capacity of solid scrap steel, in kJ / (kg·℃), T4 is the melting point of scrap steel, in °C. T2 is the temperature before scrap steel is added, in °C. q is the latent heat of melting of scrap steel, in kJ / kg.

8. A system for calculating the maximum amount of scrap steel added to a ladle, characterized in that: The method for calculating the maximum amount of scrap steel added to the ladle according to any one of claims 1 to 7 comprises: The parameter input module is used to obtain the user-inputted required temperature T1 of the molten iron at the pretreatment station and the average transportation temperature drop △T during the period from the molten iron ladle receiving the iron to the pretreatment station; The module for calculating the minimum temperature of molten iron before transportation is used to calculate the minimum temperature of molten iron T3 based on the temperature T1 of the molten iron at the pretreatment station required by the steelmaking and smelting varieties and the average transportation temperature drop △T during the period from the molten iron ladle to the pretreatment station; The molten iron temperature detection module is used to obtain the molten iron temperature T before adding scrap steel; Heat calculation module, used to calculate the released heat Q based on the molten iron temperature T and the lowest temperature T3 before the molten iron is transported; The maximum amount of scrap steel added is calculated using a module for calculating the maximum amount of scrap steel added m2 based on the heat Q.

9. An electronic device, characterized in that: The method comprises a memory, a processor and a computer program stored in the memory and executable on the processor, wherein the processor is configured to implement the steps of the method for calculating the maximum amount of scrap steel added to the ladle as claimed in any one of claims 1 to 7 when executing the computer program.

10. A storage medium, characterized in that: The storage medium stores a computer program, which, when executed by a processor, implements the steps of the method for calculating the maximum amount of scrap steel added to the ladle as claimed in any one of claims 1 to 7.

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