Electric arc furnace foaming slag height control method and device

Abstract

The embodiment of the invention provides an electric arc furnace foam slag height control method and device, and the method comprises the steps that the generation volume of foam gas is determined based on electric arc furnace operation parameters, and the carbon powder consumption amount and the oxygen consumption amount are determined and controlled according to the generation volume of the foam gas, the foamed slag height of the electric arc furnace is controlled to be the preset ideal foamed slag height; according to an optical fiber temperature measurement sensor arranged on the side wall of the electric arc furnace and an X-ray high-temperature probe arranged outside the electric arc furnace, the current foam slag height of the electric arc furnace is determined in real time; correcting the carbon powder consumption and the oxygen consumption according to the current foamed slag height of the electric arc furnace and the ideal foamed slag height; according to the application, the changes of the molten steel liquid level and the slag liquid level are accurately monitored, furnace door opening observation is not needed, so that the heat loss is reduced, meanwhile, the oxygen blowing and carbon spraying rates are dynamically adjusted based on monitoring data and computational logic, the resource utilization rate is improved, the raw material consumption is reduced, the smelting cost is reduced, and gas emission is effectively controlled.

Description

Technical Field

[0001] The present application relates to the field of arc control, and specifically relates to a method and device for controlling the height of foamed slag in an electric arc furnace. Background Art

[0002] As an important means of modern steelmaking technology, electric arc furnace steelmaking has been widely used globally due to its advantages such as short process, low energy consumption, and less gas emissions. Compared with the traditional blast furnace-converter steelmaking method, electric arc furnace steelmaking can directly use scrap steel as the main raw material, reducing the dependence on iron ore and avoiding a large amount of gas emissions during coke smelting. This steelmaking method not only improves production efficiency but also helps the steel industry to develop towards the direction of green and low-carbon. In the process of electric arc furnace steelmaking, the foamed slag technology plays a crucial role. By forming a foamed slag layer above the molten pool, this technology can effectively cover the electric arc, improve the power factor and thermal efficiency of the electric furnace, reduce the consumption of electrodes, and enhance the power supply efficiency, making the arc energy more concentratedly transferred to the molten pool. In addition, the foamed slag can effectively shorten the smelting cycle and reduce the unit energy consumption, thereby improving the overall production efficiency.

[0003] The formation of foamed slag mainly depends on the processes of carbon injection and oxygen blowing, that is, during the smelting process, carbon powder is injected into the molten pool and oxygen is blown in, so that carbon reacts with oxygen to generate CO bubbles, thereby promoting the foaming of the slag. However, at present, the carbon injection and oxygen blowing operations of electric arc furnaces in steel enterprises mainly rely on the experience of operators for regulation, lacking precise calculation and automatic control means. This method relying on human judgment often leads to the phenomenon of "overblowing", that is, the injection amount of oxygen or carbon powder is too much, resulting in waste of resources, and may affect the stability of the foamed slag, and further affect the smelting quality. Summary of the Invention

[0004] Aiming at the problems in the prior art, the present application provides a method and device for controlling the height of foamed slag in an electric arc furnace, which can accurately monitor the changes in the liquid level of molten steel and the liquid level of slag, without the need for manual opening of the furnace door to observe, thereby reducing heat loss. At the same time, based on the monitoring data and calculation logic, the oxygen blowing and carbon injection rates are dynamically adjusted, improving resource utilization rate, reducing raw material consumption, lowering smelting costs, and effectively controlling gas emissions.

[0005] To solve at least one of the above problems, the present application provides the following technical solutions:

[0006] According to the first aspect of the embodiments of the present application, the present application provides a method for controlling the height of foamed slag in an electric arc furnace, including:

[0007] Determining the generated volume of foamed gas based on the operating parameters of the electric arc furnace, and determining and controlling the consumption of carbon powder and oxygen consumption according to the generated volume of the foamed gas, so as to control the height of the foamed slag in the electric arc furnace at a preset ideal foamed slag height;

[0008] Determine the total liquid level height in the electric arc furnace based on the first temperature signal obtained by the optical fiber temperature sensor set on the side wall of the electric arc furnace;

[0009] Determine the molten steel liquid level height in the electric arc furnace based on the second temperature signal obtained by the X-ray high-temperature probe set outside the electric arc furnace;

[0010] Determine the current foam slag height of the electric arc furnace in real time according to the total liquid level height and the molten steel liquid level height;

[0011] Correct the carbon powder consumption and the oxygen consumption according to the current foam slag height of the electric arc furnace and the ideal foam slag height.

[0012] According to any embodiment of the present application, determining the generated volume of the foam gas based on the operating parameters of the electric arc furnace, and determining and controlling the carbon powder consumption and the oxygen consumption according to the generated volume of the foam gas, so that the foam slag height of the electric arc furnace is controlled within a preset ideal height range, includes:

[0013] Determine the initial radius and the maximum rupture radius of the foam slag foaming based on the molten steel state parameters in the electric arc furnace;

[0014] Determine the maximum volume of a single foam according to the initial radius and the maximum rupture radius of the foam slag foaming;

[0015] Determine the generated volume of the foam gas according to the ideal foam slag height and the bottom area of the electric arc furnace, and determine the total number of bubbles according to the generated volume of the foam gas and the maximum volume of a single foam;

[0016] Determine the generated amount of the foam gas per minute according to the total number of bubbles and the average duration of the bubbles in the foam slag;

[0017] Determine and control the carbon powder consumption and the oxygen consumption according to the generated amount of the foam gas per minute, so that the foam slag height of the electric arc furnace is controlled within the preset ideal foam slag height.

[0018] According to any embodiment of the present application, determining the generated volume of the foam gas based on the operating parameters of the electric arc furnace, and determining and controlling the carbon powder consumption and the oxygen consumption according to the generated volume of the foam gas, so that the foam slag height of the electric arc furnace is controlled within a preset ideal height range, includes:

[0019] Determine the total oxygen consumption in the electric arc furnace according to the oxygen supply amount of a single oxygen lance in the electric arc furnace and the number of oxygen lances;

[0020] Determine the oxygen consumption of the gas part according to the gas consumption in the electric arc furnace;

[0021] Determine the oxygen consumption of the foamed slag based on the total oxygen consumption and the oxygen consumption of the fuel gas part;

[0022] Determine the generated volume of the foamed gas based on the oxygen consumption of the foamed slag, and determine the current foamed slag height based on the generated volume of the foamed gas and the bottom area of the electric arc furnace;

[0023] Determine and control the consumption of carbon powder and oxygen consumption based on the current foamed slag height and the average duration of the bubbles in the foamed slag, so that the height of the foamed slag in the electric arc furnace is controlled at a preset ideal foamed slag height.

[0024] According to any embodiment of the present application, before determining the generated volume of the foamed gas based on the operating parameters of the electric arc furnace and determining and controlling the consumption of carbon powder and oxygen consumption based on the generated volume of the foamed gas so that the height of the foamed slag in the electric arc furnace is controlled at a preset ideal foamed slag height, further include:

[0025] Determine the current required ideal foamed slag height according to the arc length.

[0026] According to any embodiment of the present application, the optical fiber temperature sensor includes a plurality of optical fiber measurement points, a plurality of measurement channels, an optical fiber cable, and an optical fiber grating demodulator;

[0027] The plurality of optical fiber measurement points are arranged in each measurement channel;

[0028] The optical fiber cable is respectively connected to the plurality of measurement channels and the optical fiber grating demodulator;

[0029] The optical fiber grating demodulator collects a plurality of temperature signals obtained by the plurality of optical fiber measurement points through the optical fiber cable, and determines the first temperature signal according to the plurality of temperature signals.

[0030] According to any embodiment of the present application, the correction of the carbon powder consumption and the oxygen consumption according to the current foamed slag height of the electric arc furnace and the ideal foamed slag height includes:

[0031] In response to the current foamed slag height of the electric arc furnace being greater than the ideal foamed slag height, reduce the carbon powder consumption and the oxygen consumption;

[0032] In response to the current foamed slag height of the electric arc furnace being less than the ideal foamed slag height, increase the carbon powder consumption and the oxygen consumption.

[0033] According to the second aspect of the embodiments of the present application, the present application provides an electric arc furnace foamed slag height control device, including:

[0034] A foam gas generation calculation module, configured to: determine the generated volume of foam gas based on the operating parameters of the electric arc furnace, and determine and control the consumption amounts of carbon powder and oxygen according to the generated volume of the foam gas, so as to control the height of the foam slag in the electric arc furnace at a preset ideal foam slag height;

[0035] A total liquid level height measurement module, configured to: determine the total liquid level height in the electric arc furnace according to the first temperature signal obtained by the optical fiber temperature sensor arranged on the side wall of the electric arc furnace;

[0036] A molten steel liquid level height measurement module, configured to: determine the molten steel liquid level height in the electric arc furnace according to the second temperature signal obtained by the X-ray high-temperature probe arranged outside the electric arc furnace;

[0037] A foam slag height calculation module, configured to: determine the current foam slag height in the electric arc furnace in real time according to the total liquid level height and the molten steel liquid level height;

[0038] A blowing parameter correction module, configured to: correct the consumption amounts of carbon powder and oxygen according to the current foam slag height in the electric arc furnace and the ideal foam slag height.

[0039] According to any embodiment of the present application, the foam gas generation calculation module includes:

[0040] A foam slag foaming parameter calculation unit, configured to: determine the initial radius and maximum rupture radius of foam slag foaming based on the molten steel state parameters in the electric arc furnace;

[0041] A single foam volume calculation unit, configured to: determine the maximum volume of a single foam according to the initial radius and maximum rupture radius of the foam slag foaming;

[0042] A foam gas volume calculation unit, configured to: determine the generated volume of foam gas according to the ideal foam slag height and the bottom area of the electric arc furnace, and determine the total number of bubbles according to the generated volume of the foam gas and the maximum volume of a single foam;

[0043] A foam gas generation rate calculation unit, configured to: determine the generated amount of foam gas per minute according to the total number of bubbles and the average duration of the bubbles in the foam slag;

[0044] A first blowing control unit, configured to: determine and control the consumption amounts of carbon powder and oxygen according to the generated amount of foam gas per minute, so as to control the height of the foam slag in the electric arc furnace at a preset ideal foam slag height.

[0045] According to any embodiment of the present application, the foam gas generation calculation module includes:

[0046] A total oxygen consumption calculation unit, configured to: determine the total oxygen consumption in the electric arc furnace according to the oxygen supply amount of a single oxygen lance of the electric arc furnace and the number of oxygen lances;

[0047] A gas oxygen consumption calculation unit, configured to: determine the oxygen consumption of the gas part according to the gas consumption in the electric arc furnace;

[0048] A foamed slag oxygen consumption calculation unit, configured to: determine the oxygen consumption of the foamed slag part according to the total oxygen consumption and the oxygen consumption of the gas part;

[0049] A foamed slag height calculation unit, configured to: determine the generated volume of foamed gas according to the oxygen consumption of the foamed slag part, and determine the current foamed slag height according to the generated volume of the foamed gas and the bottom area of the electric arc furnace;

[0050] A second injection control unit, configured to: determine and control the carbon powder consumption and oxygen consumption according to the current foamed slag height and the average duration of bubbles in the foamed slag, so as to control the foamed slag height of the electric arc furnace at a preset ideal foamed slag height.

[0051] According to any embodiment of the present application, before determining the generated volume of foamed gas based on the operating parameters of the electric arc furnace, and determining and controlling the carbon powder consumption and oxygen consumption according to the generated volume of the foamed gas so as to control the foamed slag height of the electric arc furnace at a preset ideal foamed slag height, it further includes an ideal height determination module, configured to:

[0052] Determine the current required ideal foamed slag height according to the arc length.

[0053] According to any embodiment of the present application, the optical fiber temperature sensor includes a plurality of optical fiber measurement points, a plurality of measurement channels, an optical fiber cable, and an optical fiber grating demodulator;

[0054] The plurality of optical fiber measurement points are arranged in each measurement channel;

[0055] The optical fiber cable is respectively connected to the plurality of measurement channels and the optical fiber grating demodulator;

[0056] The optical fiber grating demodulator collects a plurality of temperature signals obtained by the plurality of optical fiber measurement points through the optical fiber cable, and determines the first temperature signal according to the plurality of temperature signals.

[0057] According to any embodiment of the present application, the injection parameter correction module includes:

[0058] A first correction unit, configured to: in response to the current foamed slag height of the electric arc furnace being greater than the ideal foamed slag height, reduce the carbon powder consumption and the oxygen consumption;

[0059] A second correction unit, configured to: in response to the current height of the foamed slag in the electric arc furnace being less than the ideal height of the foamed slag, increase the consumption of carbon powder and the consumption of oxygen.

[0060] According to a third aspect of the embodiments of the present application, the present application provides an electronic device, including a memory, a processor, and a computer program stored on the memory and executable on the processor. When the processor executes the program, the steps of the method for controlling the height of the foamed slag in the electric arc furnace are implemented.

[0061] According to a fourth aspect of the embodiments of the present application, the present application provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method for controlling the height of the foamed slag in the electric arc furnace are implemented.

[0062] According to a fifth aspect of the embodiments of the present application, the present application provides a computer program product, including a computer program / instructions. When the computer program / instructions are executed by a processor, the steps of the method for controlling the height of the foamed slag in the electric arc furnace are implemented.

[0063] As can be seen from the above technical solutions, the present application provides a method and device for controlling the height of the foamed slag in an electric arc furnace. By determining the generated volume of the foaming gas based on the operating parameters of the electric arc furnace, and determining and controlling the consumption of carbon powder and the consumption of oxygen according to the generated volume of the foaming gas, the height of the foamed slag in the electric arc furnace is controlled within a preset ideal height of the foamed slag; the current height of the foamed slag in the electric arc furnace is determined in real time according to the optical fiber temperature sensor arranged on the side wall of the electric arc furnace and the X-ray high-temperature probe arranged outside the electric arc furnace; the consumption of carbon powder and the consumption of oxygen are corrected according to the current height of the foamed slag in the electric arc furnace and the ideal height of the foamed slag; the precise monitoring of the changes in the liquid level of the molten steel and the slag level is carried out, without the need for manual opening of the furnace door for observation, thereby reducing heat loss. At the same time, based on the monitoring data and calculation logic, the oxygen blowing and carbon spraying rates are dynamically adjusted, improving resource utilization rate, reducing raw material consumption, reducing smelting costs, and effectively controlling gas emissions. Description of the Drawings

[0064] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0065] Figure 1 It is one of the flowcharts of the method for controlling the height of the foamed slag in the electric arc furnace in the embodiments of the present application;

[0066] Figure 2Schematic diagram of the slag foam height monitoring device in the embodiments of the present application;

[0067] Figure 3 Second flowchart of the arc furnace foam slag height control method in the embodiments of the present application;

[0068] Figure 4 Third flowchart of the arc furnace foam slag height control method in the embodiments of the present application;

[0069] Figure 5 Schematic diagram of the optical fiber temperature measurement operation in the embodiments of the present application;

[0070] Figure 6 Structural diagram of the arc furnace foam slag height control device in the embodiments of the present application;

[0071] Figure 7 Schematic diagram of the structure of the electronic device in the embodiments of the present application. Detailed implementation manners

[0072] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0073] In the technical solutions of the present application, the acquisition, storage, use, processing, etc. of data all comply with the relevant regulations of laws and regulations.

[0074] Considering the problem that the carbon injection and oxygen blowing operations of the arc furnace in current steel enterprises mainly rely on the experience of operators for regulation, lacking precise calculation and automatic control means, the present application provides an arc furnace foam slag height control method and device, which can accurately monitor the changes in the liquid steel surface and the slag surface, without the need for manual opening of the furnace door for observation, thereby reducing heat loss. At the same time, based on the monitoring data and calculation logic, the oxygen blowing and carbon injection rates are dynamically adjusted, improving resource utilization rate, reducing raw material consumption, lowering smelting costs, and effectively controlling gas emissions.

[0075] To accurately monitor the changes in the liquid steel surface and the slag surface, without the need for manual opening of the furnace door for observation, thereby reducing heat loss. At the same time, based on the monitoring data and calculation logic, the oxygen blowing and carbon injection rates are dynamically adjusted, improving resource utilization rate, reducing raw material consumption, lowering smelting costs, and effectively controlling gas emissions, the present application provides an embodiment of an arc furnace foam slag height control method. Refer to Figure 1 , the arc furnace foam slag height control method specifically includes the following content:

[0076] Step S101: Determine the generation volume of the foaming gas based on the operating parameters of the electric arc furnace, and determine and control the consumption of carbon powder and oxygen according to the generation volume of the foaming gas, so as to control the height of the foamed slag in the electric arc furnace at a preset ideal foamed slag height.

[0077] During the steelmaking process in the electric arc furnace, the formation of the foamed slag mainly depends on the chemical reaction between carbon powder and oxygen. The CO gas generated by this reaction promotes the foaming of the slag, thereby forming a foamed slag layer. In this step, the operating parameters of the electric arc furnace are first obtained, including the arc length, smelting temperature, furnace pressure, oxygen flow rate, carbon powder injection rate, etc., and the generation volume of the foaming gas (mainly CO) is calculated based on these parameters. The volume of the foaming gas directly affects the height of the foamed slag. Therefore, by controlling the injection amounts of carbon powder and oxygen, the height of the foamed slag is stabilized within the set ideal range.

[0078] Step S102: Determine the total liquid level height in the electric arc furnace according to the first temperature signal obtained by the optical fiber temperature sensor arranged on the side wall of the electric arc furnace.

[0079] An optical fiber temperature sensor encapsulated with a superalloy is installed on the side wall of the electric arc furnace. This sensor can accurately sense the temperature changes at different height positions and transmit the measurement signal to the system for analysis. Since the temperature distribution inside the electric arc furnace has significant differences, the temperature of the molten steel and the foam layer is usually relatively high, while the air temperature is relatively low. Therefore, the total height range boundary between the foamed slag and the molten steel can be identified through the change of the temperature gradient. In this step, the temperature data measured by the optical fiber sensor is used to calculate the total liquid level height of the entire molten pool, that is, the combined height of the molten steel and the foamed slag, providing a data basis for the accurate calculation of the foamed slag height in the subsequent steps.

[0080] Step S103: Determine the molten steel liquid level height in the electric arc furnace according to the second temperature signal obtained by the X-ray high-temperature probe arranged outside the electric arc furnace.

[0081] In order to further improve the measurement accuracy, in this step, an X-ray high-temperature probe is arranged outside the electric arc furnace. This probe can penetrate the furnace body material and accurately scan the temperature distribution inside the furnace. Since the penetration ability of X-rays in different media is different, the molten steel can be detected with a clear molten steel liquid level position due to its high density and low X-ray transmittance.

[0082] Step S104: Determine the current foamed slag height of the electric arc furnace in real time according to the total liquid level height and the molten steel liquid level height.

[0083] After obtaining the total liquid level height (foamed slag + molten steel) and the molten steel liquid level height in the electric arc furnace, in this step, the real-time height of the foamed slag is calculated by the numerical difference between the two, that is:

[0084] The height of the foamy slag = the total liquid level height - the molten steel liquid level height.

[0085] Step S105: Correct the carbon powder consumption and the oxygen consumption according to the current foamy slag height of the electric arc furnace and the ideal foamy slag height.

[0086] To ensure that the foamy slag can always be maintained at the ideal height, in this step, the foamy slag height obtained by real-time calculation is compared with the set target height. If the foamy slag height is lower than the target height, the system will appropriately increase the injection amounts of carbon powder and oxygen to promote the generation of CO gas and increase the foamy slag height; if the foamy slag height exceeds the target range, the injection of carbon powder or oxygen will be reduced to avoid the energy waste and unstable smelting caused by the "overblowing" phenomenon.

[0087] In an optional embodiment, the correcting the carbon powder consumption and the oxygen consumption according to the current foamy slag height of the electric arc furnace and the ideal foamy slag height includes:

[0088] In response to the current foamy slag height of the electric arc furnace being greater than the ideal foamy slag height, reducing the carbon powder consumption and the oxygen consumption;

[0089] In response to the current foamy slag height of the electric arc furnace being less than the ideal foamy slag height, increasing the carbon powder consumption and the oxygen consumption.

[0090] As can be seen from the above description, the method for controlling the foamy slag height of the electric arc furnace provided by the embodiment of the present application can accurately monitor the changes in the molten steel liquid level and the slag liquid level, without the need for manual opening of the furnace door for observation, thereby reducing heat loss. At the same time, based on the monitoring data and calculation logic, the oxygen blowing and carbon injection rates are dynamically adjusted, improving the resource utilization rate, reducing the consumption of raw materials, reducing the smelting cost, and effectively controlling gas emissions.

[0091] Figure 2 Disclosed is a foamy slag height monitoring device based on optical fiber temperature measurement and X-ray detection technology, which mainly consists of an optical fiber temperature sensor 1 installed inside the refractory material on the side wall of the electric arc furnace, an X-ray high-temperature probe 2 arranged outside the electric arc furnace, and a refractory material protective layer 3.

[0092] Optical fiber temperature sensors are arranged at different heights along the furnace wall. By monitoring the temperature gradient changes at each point, the total liquid level height in the furnace can be indirectly determined. The X-ray high-temperature probe can penetrate the furnace wall and scan the position of the molten steel surface in the furnace. Since X-rays can penetrate the foamy slag but not the high-density molten steel, the height of the molten steel surface can be accurately measured. Based on these two measurement data, the calculation system subtracts the height of the molten steel surface from the total liquid level height to determine the thickness of the foamy slag in real time and feeds this value back to the control system to adjust the carbon powder injection amount and oxygen supply amount, ensuring that the foamy slag is always maintained within the ideal range, thereby improving the smelting efficiency, reducing energy consumption, minimizing resource waste, and optimizing the stability of the electric arc furnace smelting process.

[0093] In an embodiment of the method for controlling the height of the foamy slag in the electric arc furnace of the present application, refer to Figure 3 , which is based on the operating parameters of the electric arc furnace to determine the generated volume of the foamy gas, and determine and control the carbon powder consumption and oxygen consumption according to the generated volume of the foamy gas, so that the height of the foamy slag in the electric arc furnace is controlled within a preset ideal height range, including:

[0094] Step S01A: Determine the initial radius and maximum rupture radius of the foamy slag foaming based on the molten steel state parameters in the electric arc furnace.

[0095] First, determine the required ideal height of the foamy slag according to the arc length. Since the arc length determines the power transfer efficiency during the smelting process, and the reasonable coverage of the foamy slag helps to improve the arc stability, reduce heat loss, and optimize energy utilization.

[0096] After determining the arc length, combined with smelting experience and process requirements, the height of the foamy slag is usually set within a proportional range of the arc length to ensure the best submerged arc smelting effect. In addition, it is also necessary to consider the influence of environmental factors on the stability of the foamy slag, such as the furnace temperature, smelting atmosphere, and composition changes of the foamy slag. Finally, calculate the ideal height of the foamy slag suitable for the current smelting conditions by combining these parameters.

[0097] To accurately calculate the generation process of the foamy slag, it is first necessary to determine the initial radius and maximum rupture radius of the foamy slag foaming based on the molten steel state parameters in the electric arc furnace (such as temperature, viscosity, surface tension, smelting power, etc.). The initial radius determines the starting scale of bubble formation, while the maximum rupture radius describes the maximum size of the bubble that can stably exist in the foamy slag layer and directly affects the final thickness and stability of the foamy slag. Using these parameters, the maximum volume of a single bubble can be further calculated, that is, the volume size that a single foam can reach under the best conditions.

[0098] Exemplarily, the formation of foamy slag depends on the activity of the molten steel surface and the gas generated by the carbon-oxygen reaction. Therefore, the initial radius and maximum rupture radius of the foam bubbles are mainly affected by factors such as the temperature of the molten steel, the viscosity of the slag, and the surface tension. When calculating the initial radius, based on the bubble formation conditions at the interface between the molten steel and the slag, the minimum bubble radius can be calculated using the surface tension of the slag, that is, the bubble size that can be stably formed under the action of the surface tension. For the maximum rupture radius, considering the expansion process of the bubble in the foamy slag, this radius is usually determined by the viscosity of the slag, the bubble rising rate, and the change in the internal gas pressure, and is usually calculated using fluid mechanics formulas combined with experimental data.

[0099] Step S01B: Determine the maximum volume of a single foam according to the initial radius and maximum rupture radius of the foamy slag foaming.

[0100] After determining the initial radius and maximum rupture radius of the foam bubbles, the maximum volume of a single foam can be calculated using the sphere volume formula. Generally, the bubble in the slag experiences a process of gradually expanding from the initial radius to the maximum rupture radius. Therefore, it can be assumed that the maximum volume of the foam before rupture is equal to the volume of a spherical bubble. To improve the calculation accuracy, the stability parameter of the foamy slag also needs to be combined, considering the deviation of the bubble shape, to correct the calculated value of the volume of a single foam to make it more in line with the actual industrial production situation.

[0101] Step S01C: Determine the generated volume of the foam gas according to the ideal height of the foamy slag and the bottom area of the electric arc furnace, and determine the total number of bubbles according to the generated volume of the foam gas and the maximum volume of a single foam.

[0102] The total volume of the foamy slag layer depends on the bottom area of the electric arc furnace and the ideal height of the foamy slag. When calculating, it can be assumed that the foamy slag layer is an approximate cylinder or other furnace geometric shape, and the total volume of the foamy slag layer can be obtained by multiplying the known bottom area of the furnace by the height of the foamy slag. After determining the generated volume of the foam gas, by calculating the maximum volume of a single foam, the total volume of the foamy slag layer is divided by the volume of a single foam, thereby obtaining the total number of bubbles in the foamy slag layer.

[0103] Step S01D: Determine the generated amount of the foam gas per minute according to the total number of bubbles and the average duration of the bubbles in the foamy slag.

[0104] To further quantify the foamy slag generation rate, the average duration of the bubbles in the foamy slag layer also needs to be considered, that is, the time from the formation to the rupture of a single bubble. Through this time parameter, the generated amount of the foam gas per minute can be calculated, so as to accurately predict the dynamic change of the foamy slag during the smelting process.

[0105] The formation of foamy slag is a dynamic process where bubbles continuously generate, rise, and eventually burst. Therefore, to ensure that the height of the foamy slag is maintained in a stable state, it is necessary to calculate the generation rate of the foamy gas. This calculation is first based on the total number of bubbles, and then combined with the average survival time of the bubbles in the foamy slag. By dividing the total number of bubbles by the survival time, the generation amount of the foamy gas per minute can be obtained.

[0106] Step S01E: Determine and control the consumption amounts of carbon powder and oxygen according to the generation amount of the foamy gas per minute, so as to control the height of the foamy slag in the electric arc furnace at a preset ideal foamy slag height.

[0107] Finally, according to the generation amount of the foamy gas per minute and combined with the carbon-oxygen reaction mechanism, the required injection amount of carbon powder and the consumption amount of oxygen per minute can be calculated. The generation of the foamy gas mainly depends on the reaction between carbon powder and oxygen. Therefore, by calculating the amount of CO gas that needs to be generated per minute, the required consumption amounts of carbon powder and oxygen can be deduced inversely. When calculating the demand for carbon powder, the stoichiometric relationship of the metallurgical reaction needs to be considered, that is, the mass of carbon powder consumed for generating a certain volume of CO. At the same time, when calculating the consumption amount of oxygen, the utilization rate of oxygen also needs to be considered to ensure that the oxygen blowing amount can meet the formation requirements of the foamy slag without causing excessive oxidation or energy waste. Finally, according to the calculated consumption amounts of carbon powder and oxygen, the control system can dynamically adjust the carbon injection and oxygen blowing rates, so that the height of the foamy slag is always maintained within the set ideal range, thereby optimizing the smelting efficiency, improving the energy utilization rate, and reducing the waste of raw materials.

[0108] In an embodiment of the method for controlling the height of the foamy slag in the electric arc furnace of the present application, refer to Figure 4 and the method for determining the generation volume of the foamy gas based on the operating parameters of the electric arc furnace and determining and controlling the consumption amounts of carbon powder and oxygen according to the generation volume of the foamy gas, so as to control the height of the foamy slag in the electric arc furnace within a preset ideal height range includes:

[0109] Step S02A: Determine the total oxygen consumption in the electric arc furnace according to the oxygen supply amount of a single oxygen lance in the electric arc furnace and the number of oxygen lances.

[0110] First, determine the oxygen supply rate (oxygen flow rate per unit time) of each oxygen lance, and then multiply this value by the total number of oxygen lances to obtain the total oxygen supply amount in the electric arc furnace. It should be noted that the actual oxygen consumption should also consider the oxygen utilization rate, that is, the proportion of oxygen actually participating in the reaction during the smelting process. Therefore, the total oxygen consumption is equal to the total oxygen supply amount multiplied by the oxygen utilization rate.

[0111] Step S02B: Determine the oxygen consumption of the gas part according to the gas consumption in the electric arc furnace.

[0112] During the smelting process, fuels (such as natural gas, coal gas, etc.) are used to provide heat sources, and their combustion also consumes oxygen. According to the consumption of the fuel and its stoichiometric ratio, the amount of oxygen required for the fuel combustion can be calculated. For example, given the fuel consumption and the chemical composition of the fuel, through the chemical reaction equation, the amount of oxygen required for the complete combustion of the fuel can be determined, which is the oxygen consumption of the fuel part.

[0113] Step S02C: Determine the oxygen consumption of the foamed slag part based on the total oxygen consumption and the oxygen consumption of the fuel part.

[0114] The formation of foamed slag mainly depends on the reaction of carbon powder with oxygen to generate carbon monoxide (CO) gas. By subtracting the oxygen consumption of the fuel part from the total oxygen consumption, the remaining oxygen is the oxygen consumption for the formation of foamed slag. This part of the oxygen mainly reacts with carbon powder to generate CO gas, promoting the formation of foamed slag.

[0115] Step S02D: Determine the generated volume of the foamed gas based on the oxygen consumption of the foamed slag part, and determine the current height of the foamed slag based on the generated volume of the foamed gas and the bottom area of the electric arc furnace.

[0116] Based on the oxygen consumption of the foamed slag part and combined with the stoichiometric relationship of the carbon-oxygen reaction, the volume of the generated CO gas can be calculated. Then, distributing this gas volume over the bottom area of the electric arc furnace, the height of the foamed slag can be estimated. Specifically, assuming that the CO gas is evenly distributed over the furnace bottom area, the height of the foamed slag is equal to the volume of the CO gas divided by the bottom area of the furnace.

[0117] Step S02E: Determine and control the consumption of carbon powder and oxygen consumption based on the current height of the foamed slag and the average duration of the bubbles in the foamed slag, so as to control the height of the foamed slag in the electric arc furnace at a preset ideal foamed slag height.

[0118] By comparing the current height of the foamed slag with the preset ideal height and combined with the average survival time of the bubbles in the foamed slag, the injection rates of carbon powder and oxygen can be adjusted. If the current height of the foamed slag is lower than the ideal value, the injection amounts of carbon powder and oxygen need to be increased to generate more CO gas and increase the height of the foamed slag. Conversely, the injection amounts are reduced. This dynamic adjustment mechanism ensures that the height of the foamed slag is maintained within the ideal range, optimizing the efficiency and energy utilization rate of the smelting process.

[0119] In an optional embodiment, before determining the generated volume of the foamed gas based on the operating parameters of the electric arc furnace and determining and controlling the consumption of carbon powder and oxygen consumption based on the generated volume of the foamed gas so as to control the height of the foamed slag in the electric arc furnace at a preset ideal foamed slag height, it further includes:

[0120] Determine the current required ideal foamed slag height according to the arc length.

[0121] The arc length refers to the distance between the electrode tip and the molten metal surface, which directly affects the thermal distribution in the furnace, the smelting stability, and the behavior of the foamy slag. In the short arc mode, the arc is shorter, the energy is concentrated, and the heat loss is less; while in the long arc mode, the arc is longer, the stirring effect on the molten pool is stronger, but the heat radiation loss increases. Therefore, the ideal height of the foamy slag must match the arc length to ensure that it can effectively cover the arc without affecting the arc stability.

[0122] In an optional embodiment, the fiber optic temperature sensor includes a plurality of fiber optic measurement points, a plurality of measurement channels, an optical fiber cable, and a fiber Bragg grating demodulator;

[0123] The plurality of fiber optic measurement points are arranged in each measurement channel;

[0124] The optical fiber cable is respectively connected to the plurality of measurement channels and the fiber Bragg grating demodulator;

[0125] The fiber Bragg grating demodulator collects the plurality of temperature signals obtained by the plurality of fiber optic measurement points through the optical fiber cable, and determines the first temperature signal according to the plurality of temperature signals.

[0126] As Figure 5 shown, during the steelmaking process in an electric arc furnace, the height of the foamy slag needs to be accurately measured to ensure the stability and efficiency of the smelting process. Therefore, a fiber optic temperature measuring device is used to monitor the total height of the foamy slag and the molten steel. The core component of this device is the fiber Bragg grating temperature sensor.

[0127] In order to work stably in a high-temperature environment, the fiber Bragg grating is encapsulated with a high-temperature alloy and embedded in the refractory material of the furnace wall to ensure its high temperature resistance, corrosion resistance, and the ability to accurately measure temperature changes for a long time.

[0128] Inside the refractory materials on the left and right sides of the electric arc furnace, an optical fiber is arranged every 50 mm, and a fiber optic measurement point 11 is set every 50 mm on each optical fiber. These measurement points form a plurality of measurement channels 12 and are vertically distributed along the furnace wall to ensure that the temperature change area of the foamy slag and the molten steel can be covered, thereby effectively monitoring the liquid level height.

[0129] The temperature signals sensed by each measurement point are transmitted to the fiber Bragg grating demodulator through the optical fiber cable 13. The demodulator is responsible for receiving and processing these signals and finally determining the first temperature signal, that is, the total height of the foamy slag and the molten steel in the electric arc furnace.

[0130] Since the temperature of the foamy slag is usually lower than that of the molten steel, the system can distinguish the interface position between the foamy slag and the molten steel through the temperature distribution to achieve accurate measurement.

[0131] For the precise monitoring of the changes in the molten steel level and the slag level, without the need to manually open the furnace door for observation, thereby reducing heat loss, and at the same time dynamically adjusting the oxygen blowing and carbon injection rates based on the monitoring data and calculation logic, improving resource utilization rate, reducing raw material consumption, lowering smelting costs, and effectively controlling gas emissions, this application provides an embodiment of an electric arc furnace foamed slag height control device for implementing all or part of the content of the electric arc furnace foamed slag height control method. Refer to Figure 6 The electric arc furnace foamed slag height control device specifically includes the following contents:

[0132] The foamed gas generation calculation module 1101 is used for: determining the generated volume of the foamed gas based on the operating parameters of the electric arc furnace, and determining and controlling the consumption amounts of carbon powder and oxygen according to the generated volume of the foamed gas, so as to control the height of the foamed slag in the electric arc furnace at a preset ideal foamed slag height;

[0133] The total liquid level height measurement module 1102 is used for: determining the total liquid level height in the electric arc furnace according to the first temperature signal obtained by the optical fiber temperature sensor arranged on the side wall of the electric arc furnace;

[0134] The molten steel liquid level height measurement module 1103 is used for: determining the molten steel liquid level height in the electric arc furnace according to the second temperature signal obtained by the X-ray high-temperature probe arranged outside the electric arc furnace;

[0135] The foamed slag height calculation module 1104 is used for: determining the current foamed slag height in the electric arc furnace in real time according to the total liquid level height and the molten steel liquid level height;

[0136] The injection parameter correction module 1105 is used for: correcting the consumption amounts of carbon powder and oxygen according to the current foamed slag height in the electric arc furnace and the ideal foamed slag height.

[0137] According to any implementation manner of this application, the foamed gas generation calculation module includes:

[0138] The foamed slag foaming parameter calculation unit is used for: determining the initial radius and the maximum rupture radius of the foamed slag foaming based on the molten steel state parameters in the electric arc furnace;

[0139] The single foam volume calculation unit is used for: determining the maximum volume of a single foam according to the initial radius and the maximum rupture radius of the foamed slag foaming;

[0140] The foamed gas volume calculation unit is used for: determining the generated volume of the foamed gas according to the ideal foamed slag height and the bottom area of the electric arc furnace, and determining the total number of bubbles according to the generated volume of the foamed gas and the maximum volume of a single foam;

[0141] A foam gas generation rate calculation unit, configured to: determine the amount of foam gas generated per minute according to the total number of bubbles and the average duration of the bubbles in the foamed slag;

[0142] A first injection control unit, configured to: determine and control the consumption of carbon powder and oxygen consumption according to the amount of foam gas generated per minute, so that the height of the foamed slag in the electric arc furnace is controlled at a preset ideal foamed slag height.

[0143] According to any embodiment of the present application, the foam gas generation calculation module includes:

[0144] A total oxygen consumption calculation unit, configured to: determine the total oxygen consumption in the electric arc furnace according to the oxygen supply amount of a single oxygen lance in the electric arc furnace and the number of oxygen lances;

[0145] A gas oxygen consumption calculation unit, configured to: determine the oxygen consumption of the gas part according to the gas consumption in the electric arc furnace;

[0146] A foamed slag oxygen consumption calculation unit, configured to: determine the oxygen consumption of the foamed slag part according to the total oxygen consumption and the oxygen consumption of the gas part;

[0147] A foamed slag height calculation unit, configured to: determine the generated volume of the foam gas according to the oxygen consumption of the foamed slag part, and determine the current foamed slag height according to the generated volume of the foam gas and the bottom area of the electric arc furnace;

[0148] A second injection control unit, configured to: determine and control the consumption of carbon powder and oxygen consumption according to the current foamed slag height and the average duration of the bubbles in the foamed slag, so that the height of the foamed slag in the electric arc furnace is controlled at a preset ideal foamed slag height.

[0149] According to any embodiment of the present application, before determining the generated volume of the foam gas based on the operating parameters of the electric arc furnace, and determining and controlling the consumption of carbon powder and oxygen consumption according to the generated volume of the foam gas, so that the height of the foamed slag in the electric arc furnace is controlled at a preset ideal foamed slag height, it further includes an ideal height determination module, configured to:

[0150] Determine the current required ideal foamed slag height according to the arc length.

[0151] According to any embodiment of the present application, the optical fiber temperature sensor includes a plurality of optical fiber measurement points, a plurality of measurement channels, an optical fiber cable, and an optical fiber grating demodulator;

[0152] The plurality of optical fiber measurement points are arranged in each measurement channel;

[0153] The optical fiber cable is respectively connected to the plurality of measurement channels and the optical fiber grating demodulator;

[0154] The fiber grating demodulator collects multiple temperature signals obtained by the multiple optical fiber measurement points through the optical fiber cable, and determines the first temperature signal according to the multiple temperature signals.

[0155] According to any implementation manner of the present application, the blowing parameter correction module includes:

[0156] A first correction unit for: in response to the current foamed slag height of the electric arc furnace being greater than the ideal foamed slag height, reducing the consumption of carbon powder and the consumption of oxygen;

[0157] A second correction unit for: in response to the current foamed slag height of the electric arc furnace being less than the ideal foamed slag height, increasing the consumption of carbon powder and the consumption of oxygen.

[0158] It can be seen from the above description that the electric arc furnace foamed slag height control device provided by the embodiments of the present application can accurately monitor the changes in the molten steel liquid level and the slag liquid level, without the need for manual opening of the furnace door for observation, thereby reducing heat loss. At the same time, based on the monitoring data and calculation logic, the oxygen blowing and carbon spraying rates are dynamically adjusted, improving resource utilization rate, reducing raw material consumption, reducing smelting costs, and effectively controlling gas emissions.

[0159] From the hardware level, in order to accurately monitor the changes in the molten steel liquid level and the slag liquid level, without the need for manual opening of the furnace door for observation, thereby reducing heat loss. At the same time, based on the monitoring data and calculation logic, the oxygen blowing and carbon spraying rates are dynamically adjusted, improving resource utilization rate, reducing raw material consumption, reducing smelting costs, and effectively controlling gas emissions. The present application provides an embodiment of an electronic device for implementing all or part of the content in the electric arc furnace foamed slag height control method. The electronic device specifically includes the following content:

[0160] A processor, a memory, a communication interface, and a bus; wherein, the processor, the memory, and the communication interface complete communication with each other through the bus; the communication interface is used to realize information transmission between the electric arc furnace foamed slag height control device and related devices such as the core business system, the user terminal, and the related database, etc. This logic controller can be a desktop computer, a tablet computer, a mobile terminal, etc., and this embodiment is not limited thereto. In this embodiment, this logic controller can be implemented with reference to the embodiments of the electric arc furnace foamed slag height control method and the embodiments of the electric arc furnace foamed slag height control device in the embodiments, and the content is incorporated herein, and the repeated parts will not be described again.

[0161] It can be understood that the user terminal may include a smart phone, a tablet electronic device, a network set-top box, a portable computer, a desktop computer, a personal digital assistant (PDA), a vehicle-mounted device, a smart wearable device, etc. Among them, the smart wearable device may include smart glasses, a smart watch, a smart bracelet, etc.

[0162] In practical applications, part of the arc furnace foamed slag height control method can be executed on the electronic device side as described above, or all operations can be completed in the client device. Specifically, it can be selected according to the processing capacity of the client device and the limitations of the user usage scenario, etc. This application does not make a limitation in this regard. If all operations are completed in the client device, the client device may further include a processor.

[0163] The above-mentioned client device may have a communication module (i.e., a communication unit), and can be communicatively connected to a remote server to achieve data transmission with the server. The server may include a server on the task scheduling center side, and may also include a server of an intermediate platform in other implementation scenarios, such as a server of a third-party server platform communicatively linked to the task scheduling center server. The server may include a single computer device, or may include a server cluster composed of multiple servers, or a server structure of a distributed device.

[0164] Figure 7 It is a schematic block diagram of the system composition of the electronic device 9600 according to an embodiment of the present application. As Figure 7 shown, the electronic device 9600 may include a central processing unit 9100 and a memory 9140; the memory 9140 is coupled to the central processing unit 9100. It should be noted that this Figure 7 is exemplary; other types of structures may also be used to supplement or replace this structure to implement telecommunication functions or other functions.

[0165] In one embodiment, the function of the arc furnace foamed slag height control method may be integrated into the central processing unit 9100. Among them, the central processing unit 9100 may be configured to perform the following controls:

[0166] Step S101: Determine the generated volume of the foaming gas based on the arc furnace operation parameters, and determine and control the carbon powder consumption and oxygen consumption according to the generated volume of the foaming gas, so as to control the arc furnace foamed slag height at a preset ideal foamed slag height;

[0167] Step S102: Determine the total liquid level height in the arc furnace according to the first temperature signal obtained by the optical fiber temperature sensor arranged on the side wall of the arc furnace;

[0168] Step S103: Determine the molten steel liquid level height in the electric arc furnace according to the second temperature signal obtained by the X-ray high-temperature probe arranged outside the electric arc furnace;

[0169] Step S104: Determine the current foam slag height of the electric arc furnace in real time according to the total liquid level height and the molten steel liquid level height;

[0170] Step S105: Correct the carbon powder consumption amount and the oxygen consumption amount according to the current foam slag height of the electric arc furnace and the ideal foam slag height.

[0171] As can be seen from the above description, the electronic device provided in the embodiment of the present application accurately monitors the changes in the molten steel liquid level and the slag liquid level, without the need for manual opening of the furnace door for observation, thereby reducing heat loss. At the same time, based on the monitoring data and calculation logic, the oxygen blowing and carbon spraying rates are dynamically adjusted, improving resource utilization rate, reducing raw material consumption, lowering smelting costs, and effectively controlling gas emissions.

[0172] In another embodiment, the electric arc furnace foam slag height control device can be separately configured from the central processing unit 9100. For example, the electric arc furnace foam slag height control device can be configured as a chip connected to the central processing unit 9100, and the function of the electric arc furnace foam slag height control method is realized through the control of the central processing unit.

[0173] As Figure 7 shown, the electronic device 9600 may further include: a communication module 9110, an input unit 9120, an audio processor 9130, a display 9160, and a power supply 9170. It should be noted that the electronic device 9600 does not necessarily have to include Figure 7 all the components shown in Figure 7 ; in addition, the electronic device 9600 may further include

[0174] components not shown in Figure 7 ; reference may be made to the prior art.

[0175] Among them, the memory 9140 may be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable devices. The above information related to failures can be stored, and in addition, programs for executing relevant information can also be stored. And the central processing unit 9100 can execute the program stored in the memory 9140 to implement information storage or processing, etc.

[0176] The input unit 9120 provides input to the central processing unit 9100. The input unit 9120 is, for example, a key or a touch input device. The power supply 9170 is used to supply power to the electronic device 9600. The display 9160 is used to display display objects such as images and texts. The display can be, for example, an LCD display, but is not limited thereto.

[0177] The memory 9140 can be a solid-state memory, for example, a read-only memory (ROM), a random access memory (RAM), a SIM card, etc. It can also be a memory that stores information even when powered off, can be selectively erased and has more data stored. Examples of such a memory are sometimes referred to as EPROMs, etc. The memory 9140 can also be some other type of device. The memory 9140 includes a buffer memory 9141 (sometimes referred to as a buffer). The memory 9140 can include an application / function storage unit 9142, which is used to store application programs and function programs or the processes for operating the electronic device 9600 through the central processing unit 9100.

[0178] The memory 9140 can also include a data storage unit 9143, which is used to store data, such as contacts, digital data, pictures, sounds, and / or any other data used by the electronic device. The driver storage unit 9144 of the memory 9140 can include various drivers of the electronic device for communication functions and / or for performing other functions of the electronic device (such as a messaging application, an address book application, etc.).

[0179] The communication module 9110 is a transmitter / receiver that transmits and receives signals via the antenna 9111. The communication module (transmitter / receiver) 9110 is coupled to the central processing unit 9100 to provide input signals and receive output signals, which can be the same as in the case of a conventional mobile communication terminal.

[0180] Based on different communication technologies, multiple communication modules 9110 can be provided in the same electronic device, such as a cellular network module, a Bluetooth module, and / or a wireless local area network module, etc. The communication module (transmitter / receiver) 9110 is also coupled to the speaker 9131 and the microphone 9132 via the audio processor 9130 to provide an audio output via the speaker 9131 and receive an audio input from the microphone 9132, thereby realizing normal telecommunication functions. The audio processor 9130 can include any suitable buffer, decoder, amplifier, etc. In addition, the audio processor 9130 is also coupled to the central processing unit 9100, so that it is possible to record on the local machine through the microphone 9132 and play the sound stored on the local machine through the speaker 9131.

[0181] An embodiment of the present application further provides a computer-readable storage medium capable of implementing all steps of the arc furnace foamed slag height control method in which the execution subject in the above embodiment is a server or a client. A computer program is stored on the computer-readable storage medium. When the computer program is executed by a processor, all steps of the arc furnace foamed slag height control method in which the execution subject in the above embodiment is a server or a client are implemented. For example, when the processor executes the computer program, the following steps are implemented:

[0182] Step S101: Determine the generated volume of foaming gas based on the arc furnace operation parameters, and determine and control the carbon powder consumption and oxygen consumption according to the generated volume of the foaming gas, so as to control the arc furnace foamed slag height at a preset ideal foamed slag height;

[0183] Step S102: Determine the total liquid level height in the arc furnace according to the first temperature signal obtained by the optical fiber temperature sensor arranged on the side wall of the arc furnace;

[0184] Step S103: Determine the molten steel liquid level height in the arc furnace according to the second temperature signal obtained by the X-ray high-temperature probe arranged outside the arc furnace;

[0185] Step S104: Determine the current arc furnace foamed slag height in real time according to the total liquid level height and the molten steel liquid level height;

[0186] Step S105: Correct the carbon powder consumption and the oxygen consumption according to the current arc furnace foamed slag height and the ideal foamed slag height.

[0187] As can be seen from the above description, the computer-readable storage medium provided by the embodiment of the present application accurately monitors the changes in the molten steel liquid level and the slag liquid level, without the need for manual opening of the furnace door for observation, thereby reducing heat loss. At the same time, based on the monitoring data and calculation logic, the oxygen blowing and carbon spraying rates are dynamically adjusted, improving resource utilization rate, reducing raw material consumption, reducing smelting costs, and effectively controlling gas emissions.

[0188] An embodiment of the present application further provides a computer program product capable of implementing all steps of the arc furnace foamed slag height control method in which the execution subject in the above embodiment is a server or a client. When the computer program / instructions are executed by a processor, the steps of the arc furnace foamed slag height control method are implemented. For example, the computer program / instructions implement the following steps:

[0189] Step S101: Determine the generated volume of foaming gas based on the arc furnace operation parameters, and determine and control the carbon powder consumption and oxygen consumption according to the generated volume of the foaming gas, so as to control the arc furnace foamed slag height at a preset ideal foamed slag height;

[0190] Step S102: Determine the total liquid level height in the electric arc furnace according to the first temperature signal obtained by the optical fiber temperature sensor arranged on the side wall of the electric arc furnace;

[0191] Step S103: Determine the molten steel liquid level height in the electric arc furnace according to the second temperature signal obtained by the X-ray high-temperature probe arranged outside the electric arc furnace;

[0192] Step S104: Determine the current foam slag height of the electric arc furnace in real time according to the total liquid level height and the molten steel liquid level height;

[0193] Step S105: Correct the carbon powder consumption amount and the oxygen consumption amount according to the current foam slag height of the electric arc furnace and the ideal foam slag height.

[0194] As can be seen from the above description, the computer program product provided by the embodiments of the present application accurately monitors the changes in the molten steel liquid level and the slag liquid level, without the need to manually open the furnace door for observation, thereby reducing heat loss. At the same time, based on the monitoring data and calculation logic, the oxygen blowing and carbon spraying rates are dynamically adjusted, improving resource utilization rate, reducing raw material consumption, lowering smelting costs, and effectively controlling gas emissions.

[0195] Those skilled in the art should understand that the embodiments of the present invention can be provided as a method, a device, or a computer program product. Therefore, the present invention can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present invention can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk memories, CD-ROMs, optical memories, etc.) containing computer-usable program codes.

[0196] The present invention is described with reference to the flowcharts and / or block diagrams of methods, devices (apparatus), and computer program products according to the embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram can be implemented by computer program instructions, and the combination of the processes and / or blocks in the flowchart and / or block diagram can also be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing devices to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices generate a device for realizing the functions specified in Figure 1 one process or multiple processes and / or blocks Figure 1 one block or multiple blocks.

[0197] These computer program instructions can also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory generate a manufactured product including an instruction device, and the instruction device realizes the functions in the processFigure 1 one process or multiple processes and / or blocks Figure 1 the functions specified in one block or multiple blocks

[0198] These computer program instructions can also be loaded onto a computer or other programmable data processing device, so that a series of operation steps are executed on the computer or other programmable device to generate a computer-implemented process. Thus, the instructions executed on the computer or other programmable device provide steps for implementing the functions specified in one process Figure 1 one process or multiple processes and / or blocks Figure 1 the steps of the functions specified in one block or multiple blocks

[0199] In the present invention, specific embodiments are used to elaborate on the principles and implementation manners of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. At the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manners and application scopes. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A method for controlling the height of electric arc furnace foam slag, characterized in that: include: Determine the volume of foamed gas generated based on the operating parameters of the electric arc furnace, and determine and control the carbon powder consumption and oxygen consumption according to the volume of foamed gas generated, so that the height of the foamed slag of the electric arc furnace is controlled at a preset ideal foamed slag height; Determine the total liquid level in the electric arc furnace according to a first temperature signal obtained by an optical fiber temperature sensor disposed on a side wall of the electric arc furnace; Determining the height of the molten steel level in the electric arc furnace according to a second temperature signal obtained by an X-ray high temperature probe disposed outside the electric arc furnace; Determine the current electric arc furnace foam slag height in real time according to the total liquid level height and the molten steel liquid level height; The carbon powder consumption and the oxygen consumption are corrected according to the current electric arc furnace foam slag height and the ideal foam slag height.

2. The method for controlling the height of electric arc furnace foam slag according to claim 1, characterized in that: The method of determining the volume of foamed gas generated based on the arc furnace operation parameters, and determining and controlling the carbon powder consumption and oxygen consumption according to the volume of foamed gas generated, so as to control the height of the foamed slag of the arc furnace within a preset ideal height range, includes: Determine the initial radius and maximum rupture radius of foam slag based on the state parameters of molten steel in the electric arc furnace; Determine the maximum volume of a single foam according to the initial radius of foaming and the maximum rupture radius of the foam slag; Determining the generated volume of the foam gas according to the ideal foam slag height and the bottom area of ​​the electric arc furnace, and determining the total number of bubbles according to the generated volume of the foam gas and the maximum volume of the single foam; Determine the amount of foam gas generated per minute according to the total number of bubbles and the average duration of the bubbles in the foam slag; The carbon powder consumption and oxygen consumption are determined and controlled according to the minute generation amount of the foam gas, so that the height of the electric arc furnace foam slag is controlled at a preset ideal foam slag height.

3. The method for controlling the height of electric arc furnace foam slag according to claim 1, characterized in that: The method of determining the volume of foamed gas generated based on the arc furnace operation parameters, and determining and controlling the carbon powder consumption and oxygen consumption according to the volume of foamed gas generated, so as to control the height of the foamed slag of the arc furnace within a preset ideal height range, includes: Determine the total oxygen consumption in the electric arc furnace based on the oxygen delivery of a single oxygen lance and the number of oxygen lances in the electric arc furnace; Determine the oxygen consumption of the gas part according to the gas consumption in the electric arc furnace; Determine the oxygen consumption of the foam slag part according to the total oxygen consumption and the oxygen consumption of the fuel gas part; Determining the volume of foamed gas generated according to the oxygen consumption of the foamed slag portion, and determining the current height of the foamed slag according to the volume of foamed gas generated and the bottom area of ​​the electric arc furnace; The carbon powder consumption and oxygen consumption are determined and controlled according to the current foamy slag height and the average duration of bubbles in the foamy slag, so that the foamy slag height of the electric arc furnace is controlled at a preset ideal foamy slag height.

4. The method for controlling the height of electric arc furnace foam slag according to any one of claims 1 to 3, characterized in that: Before determining the volume of foamed gas generated based on the operating parameters of the electric arc furnace, and determining and controlling the carbon powder consumption and oxygen consumption according to the volume of foamed gas generated so as to control the height of the foamed slag of the electric arc furnace to a preset ideal foamed slag height, the method further includes: The ideal foam slag height currently required is determined based on the arc length.

5. The method for controlling the height of electric arc furnace foam slag according to claim 1, characterized in that: The optical fiber temperature sensor comprises a plurality of optical fiber measurement points, a plurality of measurement channels, an optical fiber cable and an optical fiber Bragg grating demodulator; The plurality of optical fiber measurement points are arranged in each measurement channel; The optical fiber cables are respectively connected to the multiple measurement channels and the fiber grating demodulator; The fiber grating demodulator collects a plurality of temperature signals obtained from the plurality of optical fiber measurement points through the optical fiber cable, and determines the first temperature signal according to the plurality of temperature signals.

6. The method for controlling the height of electric arc furnace foam slag according to claim 1, characterized in that: The correcting the carbon powder consumption and the oxygen consumption according to the current electric arc furnace foam slag height and the ideal foam slag height includes: In response to the current electric arc furnace foam slag height being greater than the ideal foam slag height, reducing the carbon powder consumption and the oxygen consumption; In response to the current electric arc furnace foamed slag height being less than the ideal foamed slag height, the carbon powder consumption and the oxygen consumption are increased.

7. An arc furnace foam slag height control device, characterized in that: include: A foam gas generation calculation module is used to: determine the generation volume of the foam gas based on the operation parameters of the electric arc furnace, and determine and control the carbon powder consumption and oxygen consumption according to the generation volume of the foam gas, so that the height of the foam slag of the electric arc furnace is controlled at a preset ideal foam slag height; A total liquid level measurement module is used to determine the total liquid level in the electric arc furnace according to a first temperature signal obtained by an optical fiber temperature sensor arranged on the side wall of the electric arc furnace; The molten steel level measurement module is used to determine the molten steel level in the electric arc furnace according to a second temperature signal obtained by an X-ray high temperature probe arranged outside the electric arc furnace; A foam slag height calculation module is used to: determine the current foam slag height of the electric arc furnace in real time according to the total liquid level height and the molten steel liquid level height; The injection parameter correction module is used to correct the carbon powder consumption and the oxygen consumption according to the current arc furnace foam slag height and the ideal foam slag height.

8. The electric arc furnace foam slag height control device according to claim 7, characterized in that: The foam gas generation calculation module includes: The foam slag foaming parameter calculation unit is used to determine the initial radius and maximum rupture radius of the foam slag foaming based on the molten steel state parameters in the electric arc furnace; A single foam volume calculation unit is used to determine the maximum volume of a single foam according to the initial radius and the maximum rupture radius of the foam slag; A foam gas volume calculation unit, used to: determine the generated volume of the foam gas according to the ideal foam slag height and the bottom area of ​​the electric arc furnace, and determine the total number of bubbles according to the generated volume of the foam gas and the maximum volume of the single foam; A foam gas generation rate calculation unit, used to: determine the amount of foam gas generated per minute according to the total number of bubbles and the average duration of the bubbles in the foam slag; The first blowing control unit is used to determine and control the carbon powder consumption and oxygen consumption according to the amount of foam gas generated per minute, so that the height of the electric arc furnace foam slag is controlled at a preset ideal foam slag height.

9. The electric arc furnace foam slag height control device according to claim 7, characterized in that: The foam gas generation calculation module includes: The total oxygen consumption calculation unit is used to determine the total oxygen consumption in the electric arc furnace according to the oxygen supply of a single oxygen gun of the electric arc furnace and the number of oxygen guns; The gas oxygen consumption calculation unit is used to: determine the oxygen consumption of the gas part according to the gas consumption in the electric arc furnace; A foamed slag oxygen consumption calculation unit is used to: determine the foamed slag oxygen consumption according to the total oxygen consumption and the fuel gas oxygen consumption; A foam slag height calculation unit, used to: determine the generated volume of foam gas according to the oxygen consumption of the foam slag part, and determine the current foam slag height according to the generated volume of the foam gas and the bottom area of ​​the electric arc furnace; The second blowing control unit is used to determine and control the carbon powder consumption and oxygen consumption according to the current foamed slag height and the average duration of bubbles in the foamed slag, so as to control the height of the foamed slag of the electric arc furnace to a preset ideal foamed slag height.

10. The electric arc furnace foam slag height control device according to any one of claims 7 to 9, characterized in that: Before determining the volume of foamed gas generated based on the operation parameters of the electric arc furnace, and determining and controlling the carbon powder consumption and oxygen consumption according to the volume of foamed gas generated so that the height of the foamed slag of the electric arc furnace is controlled at a preset ideal foamed slag height, an ideal height determination module is also included, which is used to: The ideal foam slag height currently required is determined based on the arc length.

11. The electric arc furnace foam slag height control device according to claim 7, characterized in that: The optical fiber temperature sensor comprises a plurality of optical fiber measurement points, a plurality of measurement channels, an optical fiber cable and an optical fiber Bragg grating demodulator; The plurality of optical fiber measurement points are arranged in each measurement channel; The optical fiber cables are respectively connected to the multiple measurement channels and the fiber grating demodulator; The fiber grating demodulator collects a plurality of temperature signals obtained from the plurality of optical fiber measurement points through the optical fiber cable, and determines the first temperature signal according to the plurality of temperature signals.

12. The electric arc furnace foam slag height control device according to claim 7, characterized in that: The blowing parameter correction module comprises: A first correction unit is used to: in response to the current electric arc furnace foam slag height being greater than the ideal foam slag height, reduce the carbon powder consumption and the oxygen consumption; The second correction unit is used for: in response to the current electric arc furnace foam slag height being less than the ideal foam slag height, increasing the carbon powder consumption and the oxygen consumption.

13. An electronic device comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the program, the steps of the method for controlling the height of electric arc furnace foam slag according to any one of claims 1 to 6 are implemented.

14. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method for controlling the height of foamed slag in an electric arc furnace as claimed in any one of claims 1 to 6 are implemented.

15. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the method for controlling the height of foamed slag in an electric arc furnace as claimed in any one of claims 1 to 6 are implemented.

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