Refining control method, device and equipment for molten steel

Abstract

The invention discloses a refining control method, device and equipment for molten steel, and the method comprises the following steps: when the molten steel is refined, obtaining a first temperature and a refining item of the molten steel at a first moment; predicting a second temperature of the molten steel at a second moment based on the first temperature of the molten steel at the first moment and the refining project, the second moment being later than the first moment; and based on the second temperature and a preset target temperature, the temperature of the molten steel is adjusted, so that the temperature deviation between the temperature of the molten steel at the second moment and the target temperature is smaller than a preset temperature deviation threshold value. The technical problem that the refining safety of the molten steel is low is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of smelting, and in particular relates to a method, device and equipment for controlling the refining of molten steel. Background Art

[0002] In the process of molten steel refining, manual operation is highly relied on, and the degree of automation is low. For example, in the process of refining, the temperature of the molten steel needs to be measured manually. If the temperature of the molten steel is too high, manual operation is required to lower the temperature of the molten steel. If the temperature of the molten steel is too low, manual operation is required to raise the temperature of the molten steel.

[0003] Since the refining process of molten steel relies on manual operation, people are needed on site, and the temperature of molten steel is very high. Once leakage occurs, it will cause serious safety accidents and affect the company's reputation. Therefore, the low safety of molten steel refining is a technical problem that needs to be solved urgently. Summary of the invention

[0004] The embodiments of the present invention provide a method, device and equipment for controlling the refining of molten steel, which solve the technical problem of low safety in the refining of molten steel.

[0005] In a first aspect, an embodiment of the present invention provides a method for controlling the refining of molten steel, comprising: when refining the molten steel, obtaining a first temperature and a refining item of the molten steel at a first moment; based on the first temperature and the refining item of the molten steel at the first moment, predicting a second temperature of the molten steel at a second moment, the second moment being later than the first moment; based on the second temperature and a preset target temperature, adjusting the temperature of the molten steel so that a temperature deviation between the temperature of the molten steel at the second moment and the target temperature is less than a preset temperature deviation threshold.

[0006] In combination with the first aspect of the present invention, in some embodiments, predicting the second temperature of the molten steel at a second moment based on the first temperature of the molten steel at a first moment and the refining project includes: determining the cooling rate of the molten steel based on the refining project; determining the interval duration between the first moment and the second moment; determining the predicted cooling amount of the molten steel based on the cooling rate and the interval duration; determining the second temperature based on the first temperature and the predicted cooling amount.

[0007] In combination with the first aspect of the present invention, in some embodiments, the cooling rate of the molten steel is determined based on the refining project, including: if the refining project is decarburization, the cooling rate is 1.6-1.8°C / min; if the refining project is degassing, the cooling rate is 0.9-1.1°C / min; if the refining project is alloying, the cooling rate is 0.9-1.1°C / min.

[0008] In combination with the first aspect of the present invention, in some embodiments, adjusting the temperature of the molten steel based on the second temperature and a preset target temperature includes: if the second temperature is greater than the target temperature, determining the amount of scrap steel to be added based on a temperature deviation between the second temperature and the target temperature; adding scrap steel to the molten steel based on the amount of scrap steel to be added; if the second temperature is lower than the target temperature, determining the amount of oxygen blowing and the amount of aluminum powder based on the temperature deviation between the second temperature and the target temperature; blowing oxygen into the molten steel based on the oxygen blowing amount, and adding aluminum powder to the molten steel based on the amount of aluminum powder.

[0009] In combination with the first aspect of the present invention, in some embodiments, it is applied to RH refining equipment, the RH refining equipment includes a vacuum chamber, an immersion tube and a ladle for placing the molten steel, and the method also includes: when refining the molten steel, obtaining the current vacuum degree of the vacuum chamber; based on the current vacuum degree of the vacuum chamber, adjusting the lifting height of the ladle so that the depth deviation between the actual immersion depth and the preset target immersion depth is less than a preset depth deviation threshold, and the actual immersion depth is the immersion depth of the immersion tube in the molten steel.

[0010] In combination with the first aspect of the present invention, in some embodiments, adjusting the lifting height of the ladle based on the current vacuum degree of the vacuum chamber includes: determining a vacuum degree deviation between the current vacuum degree of the vacuum chamber and a reference vacuum degree; determining a height adjustment amount based on the vacuum degree deviation; if the current vacuum degree of the vacuum chamber is greater than the reference vacuum degree, increasing the lifting height of the ladle based on the height adjustment amount; if the current vacuum degree of the vacuum chamber is less than the reference vacuum degree, decreasing the lifting height of the ladle based on the height adjustment amount.

[0011] In combination with the first aspect of the present invention, in some embodiments, it also includes: when refining the molten steel, if the refining project is decarburization, obtaining the carbon concentration of the gas in the vacuum chamber; based on the carbon concentration of the gas in the vacuum chamber, determining the remaining refining time of the molten steel under the refining project; based on the remaining refining time, controlling the refining of the molten steel.

[0012] In combination with the first aspect of the present invention, in some embodiments, the ladle is placed on a ladle car, and the ladle car is provided with an intelligent positioning system; the method also includes: before refining the molten steel, determining the current position of the ladle car based on the intelligent positioning system; based on the current position of the ladle car, determining the driving strategy of the ladle car so as to drive the ladle car to the refining position.

[0013] In a second aspect, an embodiment of the present invention provides a refining control device for molten steel, comprising: an information acquisition unit, for acquiring a first temperature and a refining item of the molten steel at a first moment when refining the molten steel; a temperature prediction unit, for predicting a second temperature of the molten steel at a second moment based on the first temperature and the refining item of the molten steel at the first moment, the second moment being later than the first moment; and a temperature adjustment unit, for adjusting the temperature of the molten steel based on the second temperature and a preset target temperature, so that the temperature deviation between the temperature of the molten steel at the second moment and the target temperature is less than a preset temperature deviation threshold.

[0014] In a third aspect, an embodiment of 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 implements any one of the methods described in the first aspect when executing the computer program.

[0015] One or more technical solutions provided by the embodiments of the present invention achieve at least the following technical effects or advantages:

[0016] The embodiment of the present invention obtains the first temperature and refining items of the molten steel at the first moment when refining the molten steel; predicts the second temperature of the molten steel at the second moment based on the first temperature and refining items of the molten steel at the first moment, the second moment being later than the first moment; and adjusts the temperature of the molten steel based on the second temperature and the preset target temperature, so that the temperature deviation between the temperature of the molten steel at the second moment and the target temperature is less than the preset temperature deviation threshold. Based on the first temperature of the molten steel at the first moment and the refining items, the second temperature of the molten steel at the second moment is predicted, thereby realizing automatic acquisition of the temperature of the molten steel without the need for manual on-site measurement, thereby avoiding the situation where the leakage of the molten steel causes injuries to personnel. Therefore, the refining safety of the molten steel is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0018] Figure 1 Flow chart of the method for controlling the refining of molten steel in an embodiment of the present invention;

[0019] Figure 2 It is a functional module diagram of a molten steel refining control device in an embodiment of the present invention;

[0020] Figure 3 Schematic diagram of the structure of an electronic device in an embodiment of the present invention. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the present invention, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0023] The embodiment of the present invention provides a method for controlling the refining of molten steel, referring to Figure 1 As shown, the method includes the following steps S101 to S103:

[0024] S101: When refining molten steel, obtain a first temperature and refining items of the molten steel at a first moment.

[0025] It should be noted that the first moment may be an initial moment in the process of refining the molten steel, or an intermediate moment in the process of refining the molten steel. The first temperature of the molten steel at the first moment may be obtained by a temperature measuring gun.

[0026] S102: Based on the first temperature of the molten steel at the first moment and the refining items, predict the second temperature of the molten steel at the second moment, where the second moment is later than the first moment.

[0027] In some embodiments, predicting the second temperature of the molten steel at a second moment based on the first temperature of the molten steel at a first moment and the refining project can include: determining the cooling rate of the molten steel based on the refining project; determining the interval between the first moment and the second moment; determining the predicted cooling amount of the molten steel based on the cooling rate and the interval; determining the second temperature based on the first temperature and the predicted cooling amount.

[0028] In some embodiments, the cooling rate of the molten steel is determined based on the refining project, which may include: if the refining project is decarburization, the cooling rate is 1.6-1.8°C / min; if the refining project is degassing, the cooling rate is 0.9-1.1°C / min; if the refining project is alloying, the cooling rate is 0.9-1.1°C / min.

[0029] It should be noted that in the method of determining the cooling rate of the molten steel, it is also possible to directly select a fixed rate as the cooling rate of the molten steel without considering the refining project, but there is an inaccuracy. Therefore, the embodiment of the present invention limits the cooling rate of the molten steel to be determined based on the refining project, comprehensively considers the factors affecting the temperature of the molten steel, and thus improves the prediction accuracy of the molten steel temperature.

[0030] In some embodiments, the predicted cooling amount of the molten steel is determined based on the cooling rate and the interval time, which may be: the product of the cooling rate and the interval time is used as the predicted cooling amount of the molten steel. The second temperature is determined based on the first temperature and the predicted cooling amount, which may be: the difference between the first temperature and the predicted cooling amount is used as the second temperature.

[0031] S103: Based on the second temperature and the preset target temperature, the temperature of the molten steel is adjusted so that the temperature deviation between the temperature of the molten steel at the second moment and the target temperature is less than a preset temperature deviation threshold.

[0032] In some embodiments, adjusting the temperature of the molten steel based on the second temperature and a preset target temperature may include: if the second temperature is greater than the target temperature, determining the amount of scrap steel to be added based on a temperature deviation between the second temperature and the target temperature; adding scrap steel to the molten steel based on the amount of scrap steel to be added; if the second temperature is less than the target temperature, determining the amount of oxygen blowing and the amount of aluminum powder based on the temperature deviation between the second temperature and the target temperature; blowing oxygen into the molten steel based on the oxygen blowing amount, and adding aluminum powder to the molten steel based on the amount of aluminum powder.

[0033] It should be noted that since the temperature of scrap steel is room temperature, which is much lower than the temperature of molten steel, adding scrap steel to molten steel can achieve the effect of lowering the temperature of molten steel. Since the reaction of oxygen and aluminum powder can release heat, adding aluminum powder to molten steel and blowing oxygen into the molten steel can achieve the effect of raising the temperature of molten steel.

[0034] In some embodiments, the refining control method of molten steel is applied to RH refining equipment, which includes a vacuum chamber, an immersion tube and a ladle for placing molten steel. The refining control method of molten steel may also include: when refining the molten steel, obtaining the current vacuum degree of the vacuum chamber; based on the current vacuum degree of the vacuum chamber, adjusting the lifting height of the ladle so that the depth deviation between the actual immersion depth and the preset target immersion depth is less than a preset depth deviation threshold, and the actual immersion depth is the immersion depth of the immersion tube in the molten steel.

[0035] It should be noted that RH refining equipment refers to refining equipment using the RH method. The RH method, namely the steel liquid vacuum cycle degassing method, is a steel liquid refining method designed and developed jointly by West German Ruhrstahl and Hereaeus.

[0036] It should be noted that during the RH refining process, the greater the circulation flow of the molten steel, the more molten steel will enter the vacuum chamber, which helps to remove impurities and gases in the molten steel more effectively, thereby improving the refining quality of the molten steel. In addition, the shorter the mixing time of the molten steel, the more uniform the composition and temperature of the molten steel will be, which also helps to remove impurities and gases in the molten steel more effectively, thereby improving the refining quality of the molten steel. The immersion depth of the immersion tube will affect the circulation flow of the molten steel and the mixing time of the molten steel. Only by selecting a suitable target immersion depth can a larger circulation flow of the molten steel and a smaller mixing time of the molten steel be guaranteed. The target immersion depth can be 400mm to 600mm.

[0037] In some embodiments, adjusting the lifting height of the ladle based on the current vacuum degree of the vacuum chamber may include: determining the vacuum degree deviation between the current vacuum degree of the vacuum chamber and a reference vacuum degree; determining the height adjustment amount based on the vacuum degree deviation; if the current vacuum degree of the vacuum chamber is greater than the reference vacuum degree, increasing the lifting height of the ladle based on the height adjustment amount; if the current vacuum degree of the vacuum chamber is less than the reference vacuum degree, decreasing the lifting height of the ladle based on the height adjustment amount.

[0038] It should be noted that when the current vacuum degree of the vacuum chamber is greater than the reference vacuum degree, the pressure of the vacuum chamber is relatively small, the vacuum chamber absorbs more molten steel, the liquid level of the molten steel in the ladle drops significantly, and the immersion depth of the dip tube in the molten steel decreases. At this time, it is necessary to raise the ladle and increase the immersion depth of the dip tube in the molten steel so that the immersion depth of the dip tube in the molten steel reaches the target immersion depth. When the current vacuum degree of the vacuum chamber is less than the reference vacuum degree, the pressure of the vacuum chamber is relatively large, the vacuum chamber absorbs less molten steel, the liquid level of the molten steel in the ladle drops less, and the immersion depth of the dip tube in the molten steel increases. At this time, it is necessary to lower the ladle and reduce the immersion depth of the dip tube in the molten steel so that the immersion depth of the dip tube in the molten steel reaches the target immersion depth.

[0039] In some embodiments, the method for controlling the refining of molten steel may further include: when refining the molten steel, if the refining project is decarburization, obtaining the carbon concentration of the gas in the vacuum chamber; based on the carbon concentration of the gas in the vacuum chamber, determining the remaining refining time of the molten steel under the refining project; and controlling the refining of the molten steel based on the remaining refining time.

[0040] It should be noted that the carbon concentration of the gas in the vacuum chamber may include the carbon concentration of carbon monoxide and the carbon concentration of carbon dioxide. The greater the carbon concentration of the gas in the vacuum chamber, the shorter the remaining refining time of the molten steel under the refining project. Since the remaining refining time is determined according to the carbon concentration, it is avoided that the molten steel continues to be decarburized when decarburization is completed, and it is also avoided that the molten steel ends the refining when decarburization is not completed, so the beneficial effect of taking into account the refining quality and refining efficiency of the molten steel is achieved.

[0041] In some embodiments, the ladle is placed on a ladle car, and an intelligent positioning system is provided on the ladle car; the method may also include: before refining the molten steel, determining the current position of the ladle car based on the intelligent positioning system; based on the current position of the ladle car, determining the driving strategy of the ladle car to drive the ladle car to the refining position.

[0042] It should be noted that the intelligent positioning system can be a laser rangefinder. Through the distance value of the laser rangefinder, the distance between the ladle car and the reference object can be determined, and then the position of the ladle car can be determined. Through the setting of the intelligent positioning system, the automatic driving of the ladle car is realized, manual driving is avoided, and the intelligence level of molten steel refining is improved.

[0043] In some embodiments, the method may also include: obtaining the initial alloy composition of the molten steel before refining the molten steel; determining the type and amount of alloy addition required for refining the molten steel based on the initial alloy composition and a preset target alloy composition; and controlling the preparation and feeding of the molten steel during the refining process based on the type and amount of alloy addition required for refining the molten steel.

[0044] It should be noted that RH is a refining process that is currently widely used, and it mainly has functions such as decarburization, degassing, heating, and inclusion removal. In recent years, major steel mills have been committed to the research of RH refining automation, but they mainly study the vacuum process models such as decarburization, alloying, and temperature control in the refining vacuum process. There has been no report on the research of one-key automated refining of the entire process of RH from entering the station to leaving the station. In order to further improve the automation level of RH, the embodiment of the present invention is optimized on the basis of the original vacuum processing automation model, further improving the intelligence level of vacuum processing, and adding automatic entry and exit, automatic cover, automatic lifting and lowering, automatic control of decarburization time, automatic temperature measurement and sampling, automatic wire feeding or modification operations, so as to realize one-key intelligent refining of the entire process of RH, further liberate labor, and improve production stability. The embodiment of the present invention adds an intelligent positioning system, an intelligent cover system, an intelligent lifting system, a flue gas model, an intelligent temperature measurement and sampling system, an intelligent wire feeding, and a modification system to realize the refining automation of the entire process, realize one-key refining in the true sense, and avoid human intervention.

[0045] It should be noted that before smelting, the processing mode can be selected according to the type of steel, including: decarburization mode, normal mode, degassing mode, and light processing mode. After the ladle arrives at the RH sitting position, click the start button to start the automated refining operation program. The ladle car automatically moves from the sitting position to the processing position. The running position of the ladle car is precisely controlled by the intelligent positioning system. The ladle car slows down when it reaches the ladle uncovering position. Through the intelligent uncovering system, the gear is automatically used to uncover the ladle. After uncovering, the gear is lifted to a high position, and the ladle car continues to run to the processing position and stops. Through the intelligent jacking system, the jacking system starts to run. According to the ladle clearance measured by the radar system after entering the station and uncovering the ladle, the ladle car is lifted to the processing position to ensure that the immersion tube is immersed in the molten steel by 400mm to 600mm. During the smelting process, according to the selected processing mode, the vacuum pump is automatically started and the gas flow rate is adjusted; during the smelting process, the lifting height is automatically adjusted according to the change of vacuum degree; during the smelting process, the decarburization time is automatically controlled through the flue gas model; during the smelting process, the temperature is automatically predicted through the temperature control model and the temperature is adjusted by blowing oxygen or adding scrap steel; during the smelting process, the alloy adjustment model is used to automatically calculate the alloy, and the material preparation and feeding are carried out to achieve automatic alloying; during the smelting process, according to the processing mode, the intelligent temperature measurement and sampling system is used to automatically measure the temperature, take samples and prepare samples; after the alloying is completed, the pure cycle is automatically carried out. After the pure cycle is completed and the vacuum treatment is ended, the intelligent lifting system automatically breaks the air and lifts and lowers according to the change of vacuum degree; the ladle car reaches the processing position zero position and automatically drives out of the station through the intelligent positioning system. If calcium wire feeding is required, the machine will drive to the wire feeding position and lower the casing to automatically feed the wire; if modification is required, the machine will drive to the wire feeding position and automatically add the modifier; if wire feeding or modification is not required, the machine will drive to the wire feeding position and continue to run to the capping position and stop, and through the intelligent capping system, the gear will be lowered to the low position, and then the machine will drive to perform the capping operation. After capping is completed, the ladle car will automatically drive to the ladle hanging position and the process is completed.

[0046] It should be noted that the embodiment of the present invention can stably control the composition of molten steel to avoid abnormal composition caused by human operation, and reduce the abnormal composition caused by feeding errors twice a year on average, generating an annual benefit of 180,000 yuan; the embodiment of the present invention can improve production efficiency, reduce the system temperature by 1°C per furnace on average, and reduce the cost by 0.5 yuan / ton by reducing the system temperature. The average monthly output of RH is 2,000 furnaces, generating an annual benefit of 12*2000*300*0.5=3.6 million yuan. The total annual benefit is 3.6 million+18=3.78 million yuan.

[0047] The embodiment of the present invention obtains the first temperature and refining items of the molten steel at the first moment when refining the molten steel; predicts the second temperature of the molten steel at the second moment based on the first temperature and refining items of the molten steel at the first moment, the second moment being later than the first moment; and adjusts the temperature of the molten steel based on the second temperature and the preset target temperature, so that the temperature deviation between the temperature of the molten steel at the second moment and the target temperature is less than the preset temperature deviation threshold. Based on the first temperature of the molten steel at the first moment and the refining items, the second temperature of the molten steel at the second moment is predicted, thereby realizing automatic acquisition of the temperature of the molten steel without the need for manual on-site measurement, thereby avoiding the situation where the leakage of the molten steel causes injuries to personnel. Therefore, the refining safety of the molten steel is improved.

[0048] Based on the same inventive concept, Figure 2 As shown, an embodiment of the present invention provides a refining control device 10 for molten steel, comprising: an information acquisition unit 110, used to acquire a first temperature and a refining item of the molten steel at a first moment when refining the molten steel; a temperature prediction unit 120, used to predict a second temperature of the molten steel at a second moment based on the first temperature and the refining item of the molten steel at the first moment, the second moment being later than the first moment; a temperature adjustment unit 130, used to adjust the temperature of the molten steel based on the second temperature and a preset target temperature, so that a temperature deviation between the temperature of the molten steel at the second moment and the target temperature is less than a preset temperature deviation threshold.

[0049] It can be understood that the temperature prediction unit 120 includes: a rate determination subunit, which is used to determine the cooling rate of the molten steel based on the refining project; a duration determination subunit, which is used to determine the interval duration between the first moment and the second moment; a prediction subunit, which is used to determine the predicted cooling amount of the molten steel based on the cooling rate and the interval duration; and a temperature determination subunit, which is used to determine the second temperature based on the first temperature and the predicted cooling amount.

[0050] It can be understood that the rate determination subunit is specifically used for: if the refining project is decarburization, the cooling rate is 1.6-1.8°C / min; if the refining project is degassing, the cooling rate is 0.9-1.1°C / min; if the refining project is alloying, the cooling rate is 0.9-1.1°C / min.

[0051] It can be understood that the temperature adjustment unit 130 is specifically used to: if the second temperature is greater than the target temperature, determine the amount of scrap steel to be added based on the temperature deviation between the second temperature and the target temperature; add scrap steel to the molten steel based on the amount of scrap steel to be added; if the second temperature is lower than the target temperature, determine the amount of oxygen blowing and the amount of aluminum powder based on the temperature deviation between the second temperature and the target temperature; blow oxygen into the molten steel based on the oxygen blowing amount, and add aluminum powder to the molten steel based on the aluminum powder amount.

[0052] It can be understood that the refining control device 10 for molten steel is applied to RH refining equipment, which includes a vacuum chamber, an immersion tube and a ladle for placing molten steel. The refining control device 10 for molten steel also includes: a vacuum degree acquisition unit, which is used to obtain the current vacuum degree of the vacuum chamber when refining the molten steel; a lifting unit, which is used to adjust the lifting height of the ladle based on the current vacuum degree of the vacuum chamber so that the depth deviation between the actual immersion depth and the preset target immersion depth is less than the preset depth deviation threshold, and the actual immersion depth is the immersion depth of the immersion tube in the molten steel.

[0053] It can be understood that the lifting unit is specifically used to: determine the vacuum degree deviation between the current vacuum degree of the vacuum chamber and the reference vacuum degree; determine the height adjustment amount based on the vacuum degree deviation; if the current vacuum degree of the vacuum chamber is greater than the reference vacuum degree, increase the lifting height of the ladle based on the height adjustment amount; if the current vacuum degree of the vacuum chamber is less than the reference vacuum degree, lower the lifting height of the ladle based on the height adjustment amount.

[0054] It can be understood that the refining control device 10 for molten steel also includes: a carbon concentration processing unit, which is used to obtain the carbon concentration of the gas in the vacuum chamber when refining the molten steel, if the refining project is decarburization; based on the carbon concentration of the gas in the vacuum chamber, determine the remaining refining time of the molten steel under the refining project; based on the remaining refining time, control the refining of the molten steel.

[0055] It can be understood that the ladle is placed on the ladle car, and the ladle car is equipped with an intelligent positioning system; the molten steel refining control device 10 also includes: a vehicle control unit, which is used to determine the current position of the ladle car based on the intelligent positioning system before refining the molten steel; based on the current position of the ladle car, determine the driving strategy of the ladle car to drive the ladle car to the refining position.

[0056] It should be understood that more implementation details of the molten steel refining control device 10 in the embodiment of the present invention are described in the aforementioned molten steel refining control method, and for the sake of brevity of the specification, they are not repeated here.

[0057] Based on the same inventive concept, an embodiment of the present invention further provides an electronic device, such as Figure 3 As shown, it includes a memory 304, a processor 302, and a computer program stored in the memory 304 and executable on the processor 302. The processor 302 executes the program to implement the steps described in any implementation of the embodiment of the steel liquid refining control method.

[0058] Among them, Figure 3In the embodiment of the present invention, a bus architecture (represented by bus 300) is shown, which may include any number of interconnected buses and bridges, and bus 300 links various circuits including one or more processors represented by processor 302 and memory represented by memory 304. Bus 300 may also link various other circuits such as peripherals, voltage regulators, and power management circuits, which are well known in the art and are therefore not further described herein. Bus interface 305 provides an interface between bus 300 and receiver 301 and transmitter 303. Receiver 301 and transmitter 303 may be the same element, namely a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 302 is responsible for managing bus 300 and general processing, while memory 304 may be used to store data used by processor 302 when performing operations.

[0059] The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored as one or more instructions or codes on a computer-readable medium or transmitted via a computer-readable medium. Other examples and implementations are within the scope and spirit of the present invention and the appended claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hard wiring, or a combination of any of these. In addition, each functional unit may be integrated into a processing unit, each unit may exist physically separately, or two or more units may be integrated into one unit.

[0060] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units can be a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0061] The units described as separate components may or may not be physically separated, and the components of the control device may or may not be physical units, that is, they may be located in one place or distributed in multiple units. Some or all of the units may be selected according to actual needs to achieve the purpose of the present embodiment.

[0062] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions for a computer device (which can be a personal computer, a server or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present invention. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, magnetic disk or optical disk and other media that can store program codes.

[0063] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A method for controlling the refining of molten steel, characterized in that: include: When refining the molten steel, obtaining a first temperature and a refining item of the molten steel at a first moment; Based on the first temperature of the molten steel at the first moment and the refining items, predicting a second temperature of the molten steel at a second moment, the second moment being later than the first moment; Based on the second temperature and a preset target temperature, the temperature of the molten steel is adjusted so that a temperature deviation between the temperature of the molten steel at the second moment and the target temperature is less than a preset temperature deviation threshold.

2. The method for controlling the refining of molten steel according to claim 1, characterized in that: The predicting, based on the first temperature of the molten steel at the first moment and the refining items, the second temperature of the molten steel at the second moment comprises: Based on the refining project, determining the cooling rate of the molten steel; Determining a time interval between the first moment and the second moment; Determining a predicted cooling amount of the molten steel based on the cooling rate and the interval duration; The second temperature is determined based on the first temperature and the predicted temperature drop amount.

3. The method for controlling the refining of molten steel according to claim 2, characterized in that: The step of determining the cooling rate of the molten steel based on the refining project comprises: If the refining project is decarburization, the cooling rate is 1.6-1.8°C / min; If the refining project is degassing, the cooling rate is 0.9-1.1°C / min; If the refining project is alloying, the cooling rate is 0.9-1.1°C / min.

4. The method for controlling the refining of molten steel according to claim 1, characterized in that: The step of adjusting the temperature of the molten steel based on the second temperature and a preset target temperature includes: If the second temperature is greater than the target temperature, determining an amount of scrap steel to be added based on a temperature deviation between the second temperature and the target temperature; and adding scrap steel to the molten steel based on the amount of scrap steel to be added; If the second temperature is lower than the target temperature, the oxygen blowing amount and the aluminum powder amount are determined based on the temperature deviation between the second temperature and the target temperature; oxygen is blown into the molten steel based on the oxygen blowing amount, and aluminum powder is added to the molten steel based on the aluminum powder amount.

5. The method for controlling the refining of molten steel according to any one of claims 1 to 4, characterized in that: Applied to RH refining equipment, the RH refining equipment includes a vacuum chamber, an immersion tube and a ladle for placing the molten steel, and the method further includes: When refining the molten steel, obtaining the current vacuum degree of the vacuum chamber; Based on the current vacuum degree of the vacuum chamber, the lifting height of the ladle is adjusted so that the depth deviation between the actual immersion depth and the preset target immersion depth is less than a preset depth deviation threshold. The actual immersion depth is the immersion depth of the immersion tube in the molten steel.

6. The method for controlling the refining of molten steel according to claim 5, characterized in that: The step of adjusting the lifting height of the ladle based on the current vacuum degree of the vacuum chamber comprises: Determining a vacuum degree deviation between a current vacuum degree of the vacuum chamber and a reference vacuum degree; determining a height adjustment amount based on the vacuum degree deviation; If the current vacuum degree of the vacuum chamber is greater than the reference vacuum degree, raising the lifting height of the ladle based on the height adjustment amount; If the current vacuum degree of the vacuum chamber is less than the reference vacuum degree, the lifting height of the ladle is lowered based on the height adjustment amount.

7. The method for controlling the refining of molten steel according to claim 5, characterized in that: Also includes: When refining the molten steel, if the refining project is decarburization, obtaining the carbon concentration of the gas in the vacuum chamber; Determining the remaining refining time of the molten steel under the refining project based on the carbon concentration of the gas in the vacuum chamber; Based on the remaining refining time, the refining of the molten steel is controlled.

8. The method for controlling the refining of molten steel according to claim 5, characterized in that: The ladle is placed on a ladle car, and the ladle car is provided with an intelligent positioning system; the method further comprises: Before refining the molten steel, determining the current position of the ladle car based on the intelligent positioning system; Based on the current position of the ladle car, a driving strategy of the ladle car is determined to drive the ladle car to a refining position.

9. A molten steel refining control device, characterized in that: include: An information acquisition unit, used for acquiring a first temperature and a refining item of the molten steel at a first moment when the molten steel is being refined; A temperature prediction unit, configured to predict a second temperature of the molten steel at a second moment based on a first temperature of the molten steel at a first moment and a refining item, wherein the second moment is later than the first moment; The temperature adjustment unit is used to adjust the temperature of the molten steel based on the second temperature and a preset target temperature so that the temperature deviation between the temperature of the molten steel at the second moment and the target temperature is less than a preset temperature deviation threshold.

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

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