Intelligent control method and device for converter oxygen lance based on low-silicon high-phosphorus molten iron

Abstract

The application provides a converter oxygen lance intelligent control method and device based on low-silicon high-phosphorus molten iron, and relates to the technical field of metallurgical automatic control. The method comprises the following steps: acquiring a slag condition index, a dynamic dephosphorization efficiency factor and a carbon-oxygen product according to converter molten pool state information; judging a converter oxygen lance control stage according to the slag condition index, the dynamic dephosphorization efficiency factor and the carbon-oxygen product, and determining a converter oxygen lance gun position and a converter oxygen lance oxygen flow corresponding to the current converter oxygen lance control stage according to dynamic real-time data of the slag condition index, the dynamic dephosphorization efficiency factor and the carbon-oxygen product and preset parameters corresponding to the current converter oxygen lance control stage; and controlling corresponding actuators to move according to the converter oxygen lance gun position and the converter oxygen lance oxygen flow corresponding to the current converter oxygen lance control stage. The method and device provided in the application can realize smooth, efficient and accurate control of the low-silicon high-phosphorus molten iron smelting process.

Description

Technical Field

[0001] This invention relates to the field of metallurgical automatic control technology, specifically to an intelligent control method and device for a converter oxygen lance based on low-silicon, high-phosphorus molten iron. Background Technology

[0002] Converter steelmaking, as a core process in modern steel production, essentially involves the interaction of an oxygen jet with the molten pool at high temperatures to complete complex metallurgical processes such as decarburization, dephosphorization, and temperature increase. The oxygen lance, as one of the core pieces of equipment in converter steelmaking, directly determines the stirring intensity of the molten pool and the thermodynamic and kinetic conditions of the reaction zone through its injection parameters (including lance position, oxygen flow rate, and oxygen pressure). In recent years, blast furnace smelting technology has continuously developed towards "low-silicon smelting," and reducing the silicon content of molten iron through optimized operation has become a common choice for cost reduction and efficiency improvement in the industry. Therefore, low-silicon (Si content typically <0.30%) and high-phosphorus (P content typically >0.15%) molten iron has become the main raw material for steelmaking, posing a severe challenge to traditional oxygen lance control methods.

[0003] Currently, mainstream oxygen lance control relies on "static mode" or "experience curve," which involves pre-setting a fixed lance position-time curve based on molten iron conditions and the target end result. While this method is effective for conventional molten iron, it reveals serious shortcomings when dealing with special molten iron such as low-silicon, high-phosphorus iron: First, slag formation is difficult and heat source is insufficient. Silicon is a crucial heat-generating and slag-forming element in converter steelmaking. Low silicon levels lead to insufficient heat in the early stages of smelting and a low amount of SiO2 generated, making it difficult to quickly form a highly fluid, reactive, and alkaline slag. Second, the contradiction between dephosphorization and decarburization is prominent. Dephosphorization is a strongly exothermic reaction requiring "cold slag" conditions of high basicity, high oxidizing power, low temperature, and a large slag-steel interface; while decarburization is an endothermic reaction requiring "hot molten pool" conditions of high temperature and strong stirring. Traditional static oxygen lance control modes struggle to reconcile this contradiction over time, often resulting in insufficient dephosphorization in the early stages, difficulty in dephosphorization in the later stages, or over-blowing to ensure phosphorus hit at the target end, leading to reduced metal yield and increased energy consumption. Finally, the process stability is poor. Low-silicon, high-phosphorus molten iron smelting is more prone to problems such as early-stage splashing and mid-stage re-drying, making stable control difficult to achieve using traditional methods that rely on operator experience.

[0004] In recent years, although some studies have attempted to introduce detection methods such as secondary lances and furnace gas analysis, and to establish predictive models using artificial intelligence, most have focused on converter endpoint control. Research on the real-time, dynamic, and intelligent closed-loop control of oxygen lance injection, a core operational variable, is still insufficient. In particular, for the special raw material of low-silicon, high-phosphorus molten iron, there is a lack of a systematic method that, based on the metallurgical reaction mechanism, can actively and intelligently regulate the thermodynamic and kinetic states of the molten pool to resolve the contradictions of "slag formation-heating-dephosphorization-decarburization". Summary of the Invention

[0005] To address the problems in the prior art, embodiments of the present invention provide an intelligent control method and device for a converter oxygen lance based on low-silicon, high-phosphorus molten iron, which can at least partially solve the problems existing in the prior art.

[0006] On the one hand, this invention proposes an intelligent control method for a converter oxygen lance based on low-silicon, high-phosphorus molten iron, comprising: The slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product are obtained based on the converter molten pool status information. The converter oxygen lance control stage is determined based on the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product. Based on the dynamic real-time data of the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, as well as the preset parameters corresponding to the current converter oxygen lance control stage, the converter oxygen lance position and converter oxygen lance oxygen flow rate corresponding to the current converter oxygen lance control stage are determined. The corresponding actuators are controlled according to the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage to achieve intelligent control of the converter oxygen lance.

[0007] The determination of the converter oxygen lance control stage based on slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product includes: If the slag condition index is determined to be within the first preset slag condition index range and the duration reaches the preset duration, and the dynamic dephosphorization efficiency factor is within the preset dynamic dephosphorization efficiency factor range and the rate of change is less than or equal to the preset rate of change threshold, and the carbon-oxygen product value reaches the first preset carbon-oxygen product threshold, then the current converter oxygen lance control stage is determined to be the enhanced decarburization and dynamic dephosphorization stage.

[0008] The determination of the converter oxygen lance control stage based on slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product includes: If it is determined that the slag condition index is within the second preset slag condition index range, and the dynamic dephosphorization efficiency factor continues to decrease to below the preset dynamic dephosphorization efficiency factor threshold, and the carbon-oxygen product value decreases to below the second preset carbon-oxygen product threshold, then the current converter oxygen lance control stage is determined as the endpoint coordination and precision control stage. Wherein, the lower limit of the second preset slag condition index range is greater than the upper limit of the first preset slag condition index range, the preset dynamic dephosphorization efficiency factor threshold is less than the lower limit of the preset dynamic dephosphorization efficiency factor range, and the second preset carbon-oxygen product threshold is less than the first preset carbon-oxygen product threshold.

[0009] The current converter oxygen lance control stage is an enhanced decarburization and dynamic dephosphorization stage; correspondingly, determining the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage based on dynamic real-time data of slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, as well as preset parameters corresponding to the current converter oxygen lance control stage, includes: The converter oxygen lance position corresponding to the enhanced decarburization and dynamic dephosphorization stages is calculated using the following formula:

[0010] in, The converter oxygen lance positions corresponding to the enhanced decarburization and dynamic dephosphorization stages. The basic gun positions corresponding to the enhanced decarbonization and dynamic dephosphorization stages. , and The gain coefficient for the second lance position is adjusted to correspond to the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, respectively. As a factor influencing the slag condition index, This is the lower limit of the slag condition index. To enhance the reference value of the dynamic dephosphorization efficiency factor in the decarbonization and dynamic dephosphorization stages, The carbon-oxygen product value is required to enter the enhanced decarbonization and dynamic dephosphorization stage. The equilibrium constant for the carbon-oxygen reaction. The slag condition index, This is the dynamic dephosphorization efficiency factor. It is the carbon-oxygen product; The oxygen flow rate of the converter oxygen lance corresponding to the enhanced decarburization and dynamic dephosphorization stages is calculated using the following formula:

[0011] in, The oxygen flow rate of the converter oxygen lance corresponding to the enhanced decarburization and dynamic dephosphorization stages. The baseline oxygen flow rate corresponding to the enhanced decarbonization and dynamic dephosphorization stages, This represents the optimal value of the dynamic dephosphorization efficiency factor corresponding to the dynamic dephosphorization stage.

[0012] The current converter oxygen lance control stage is the rapid slag formation and initial dephosphorization period; correspondingly, determining the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage based on dynamic real-time data of slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, as well as preset parameters corresponding to the current converter oxygen lance control stage, includes: The converter oxygen lance position corresponding to the rapid slag formation and initial dephosphorization periods is calculated using the following formula:

[0013] in, The converter oxygen lance positions correspond to the rapid slag formation and initial dephosphorization periods. For the basic lance positions corresponding to the rapid slag formation and initial dephosphorization period, , and Adjust the gain coefficients for the first lance position corresponding to the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, respectively. The target slag condition index corresponds to the rapid slag formation and initial dephosphorization period. This is the dephosphorization initiation threshold. This is the initial value of the carbon-oxygen product at the start of blowing; The oxygen flow rate of the converter oxygen lance corresponding to the rapid slag formation and initial dephosphorization periods is calculated using the following formula:

[0014] in, The oxygen flow rate of the converter oxygen lance corresponding to the rapid slag formation and initial dephosphorization period. The baseline oxygen flow rate corresponding to the rapid slag formation and initial dephosphorization period, , and These are the flow compensation coefficients corresponding to the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, respectively. The target dynamic dephosphorization efficiency factor is defined as the factor corresponding to the rapid slag formation and the initial dephosphorization period.

[0015] The intelligent control method for converter oxygen lance based on low-silicon, high-phosphorus molten iron, following the step of achieving intelligent control of the converter oxygen lance, further includes: The calculation model evaluation results of the converter oxygen lance position and converter oxygen lance oxygen flow rate corresponding to each converter oxygen lance control stage are obtained. The preset parameters in the calculation models corresponding to each converter oxygen lance control stage are updated based on the evaluation results of the calculation models.

[0016] On one hand, this invention proposes an intelligent control device for a converter oxygen lance based on low-silicon, high-phosphorus molten iron, comprising: The acquisition unit is used to acquire slag condition index, dynamic dephosphorization efficiency factor and carbon-oxygen product based on converter molten pool status information; The determination unit is used to determine the converter oxygen lance control stage based on the slag condition index, dynamic dephosphorization efficiency factor and carbon-oxygen product, and to determine the converter oxygen lance position and converter oxygen lance oxygen flow rate corresponding to the current converter oxygen lance control stage based on the dynamic real-time data of the slag condition index, dynamic dephosphorization efficiency factor and carbon-oxygen product and the preset parameters corresponding to the current converter oxygen lance control stage. The control unit is used to control the corresponding actuators to perform actions based on the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage, so as to achieve intelligent control of the converter oxygen lance.

[0017] In another aspect, embodiments of the present invention provide a computer device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, it implements the following method: The slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product are obtained based on the converter molten pool status information. The converter oxygen lance control stage is determined based on the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product. Based on the dynamic real-time data of the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, as well as the preset parameters corresponding to the current converter oxygen lance control stage, the converter oxygen lance position and converter oxygen lance oxygen flow rate corresponding to the current converter oxygen lance control stage are determined. The corresponding actuators are controlled according to the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage to achieve intelligent control of the converter oxygen lance.

[0018] This invention provides a computer-readable storage medium, comprising: The computer-readable storage medium stores a computer program that, when executed by a processor, implements the following method: The slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product are obtained based on the converter molten pool status information. The converter oxygen lance control stage is determined based on the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product. Based on the dynamic real-time data of the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, as well as the preset parameters corresponding to the current converter oxygen lance control stage, the converter oxygen lance position and converter oxygen lance oxygen flow rate corresponding to the current converter oxygen lance control stage are determined. The corresponding actuators are controlled according to the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage to achieve intelligent control of the converter oxygen lance.

[0019] This invention also provides a computer program product, which includes a computer program that, when executed by a processor, implements the following method: The slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product are obtained based on the converter molten pool status information. The converter oxygen lance control stage is determined based on the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product. Based on the dynamic real-time data of the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, as well as the preset parameters corresponding to the current converter oxygen lance control stage, the converter oxygen lance position and converter oxygen lance oxygen flow rate corresponding to the current converter oxygen lance control stage are determined. The corresponding actuators are controlled according to the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage to achieve intelligent control of the converter oxygen lance.

[0020] The intelligent control method and device for converter oxygen lance based on low-silicon, high-phosphorus molten iron provided in this invention obtains slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product based on converter molten pool status information; determines the converter oxygen lance control stage based on the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product; and determines the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage based on the dynamic real-time data of the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, as well as preset parameters corresponding to the current converter oxygen lance control stage; and controls the corresponding actuators to perform actions based on the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage, so as to realize intelligent control of the converter oxygen lance and achieve stable, efficient, and precise control of the low-silicon, high-phosphorus molten iron smelting process. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a flowchart illustrating an intelligent control method for a converter oxygen lance based on low-silicon, high-phosphorus molten iron, according to an embodiment of the present invention.

[0022] Figure 2 This is a flowchart illustrating an intelligent control method for a converter oxygen lance based on low-silicon, high-phosphorus molten iron, provided in another embodiment of the present invention.

[0023] Figure 3 This is a schematic diagram of the structure of an intelligent control device for a converter oxygen lance based on low-silicon, high-phosphorus molten iron, provided in an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the physical structure of a computer device provided in an embodiment of the present invention. Detailed Implementation

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. Here, the illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0026] Figure 1 This is a flowchart illustrating an intelligent control method for a converter oxygen lance based on low-silicon, high-phosphorus molten iron, according to an embodiment of the present invention. Figure 1 As shown in the embodiment of the present invention, the intelligent control method for converter oxygen lance based on low-silicon, high-phosphorus molten iron includes: Step S1: Obtain the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product based on the converter molten pool status information.

[0027] Step S2: Determine the converter oxygen lance control stage based on the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product. Then, based on the dynamic real-time data of the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, as well as the preset parameters corresponding to the current converter oxygen lance control stage, determine the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage.

[0028] Step S3: Control the corresponding actuators to perform actions based on the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage, so as to achieve intelligent control of the converter oxygen lance.

[0029] In step S1 above, the device obtains the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product based on the converter molten pool status information. The device can be a computer device, such as a server, that executes this method. The acquisition, storage, use, and processing of data in this application's technical solution all comply with relevant regulations.

[0030] In step S2 above, the device determines the converter oxygen lance control stage based on the slag condition index, dynamic dephosphorization efficiency factor and carbon-oxygen product, and determines the converter oxygen lance position and converter oxygen lance oxygen flow rate corresponding to the current converter oxygen lance control stage based on the dynamic real-time data of the slag condition index, dynamic dephosphorization efficiency factor and carbon-oxygen product and the preset parameters corresponding to the current converter oxygen lance control stage.

[0031] In step S3 above, the device controls the corresponding actuators to perform actions based on the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage, so as to achieve intelligent control of the converter oxygen lance.

[0032] like Figure 2As shown, a real-time intelligent control closed loop for the oxygen lance in a converter based on low-silicon, high-phosphorus molten iron can be achieved based on a pre-built "sensing-diagnosis-decision-execution" system architecture. Specific details are as follows: C1 Information Sensing Layer: By collecting initial data on molten iron (such as molten iron composition, temperature, weight, and scrap steel ratio) and multi-source signals from the blowing process (such as sonar information, furnace gas composition, and secondary lance data), the state information of the converter molten pool is sensed in real time.

[0033] C2 State Diagnosis and Prediction Layer: The collected feature parameters are used as inputs, and key state parameters such as slag condition index (SCI), dynamic dephosphorization efficiency factor (DDEF), and carbon-oxygen product (CPR) are quantified in real time through the mechanism diagnosis model, and the endpoint temperature and the [C] and [P] content of the molten pool are output in a rolling manner.

[0034] Furthermore, since intelligent decision-making relies on the precise quantification of the molten pool and slag conditions, this invention introduces two core parameters in the condition diagnosis and prediction layer (C2): one is the Slag Condition Index (SCI), used to comprehensively evaluate the degree of foaming, oxidizability, and stability of the slag. It can be expressed as:

[0035] in, Real-time slag height measured by sonar; This serves as a theoretical reference for the current stage. and The volumetric flow rates of CO and CO2 in the furnace gas; and The difference between the oxygen supply flow rate and the residual oxygen flow rate in the flue gas reflects the oxygen utilization efficiency and the oxidizing property of the slag. The standard deviation of sonar signal fluctuation. The maximum value of the sonar signal fluctuation is represented by α, β, and γ, which are stage-adaptive weighting coefficients. A high SCI value indicates abundant slag foam, good activity, and low susceptibility to splashing. The second core parameter is the Dynamic Dephosphorization Efficiency Factor (DDEF), used to evaluate the kinetic conditions of the dephosphorization reaction in real time. It can be expressed as:

[0036] in, This refers to the instantaneous dephosphorization rate; R represents the iron oxide content in the slag; R represents the slag basicity. ; The DDEF is the temperature of the molten pool. DDEF integrates the dephosphorization rate (kinetics), slag properties (thermodynamics), and temperature inhibition effect. A decrease in DDEF is a direct signal of weakened dephosphorization kinetics.

[0037] C3 Intelligent Decision Layer: Determines the current blowing stage and state, and dynamically solves for the optimal oxygen lance position and oxygen supply flow rate; Based on the combined characteristics of three parameters—Slag Condition Index (SCI), Dynamic Dephosphorization Efficiency Factor (DDEF), and Carbon-Oxygen Product (CPR)—this invention determines the smelting stage to identify the optimal oxygen lance control strategy for each stage. The invention defines a stage determination function f(SCI,DDEF, CPR), with the output value being the stage number (1,2,3), thus dividing the smelting process into: Stage 1, rapid slag formation and initial dephosphorization; Stage 2, intensified decarburization and dynamic dephosphorization; and Stage 3, final stage coordination and precise control.

[0038]

[0039] Among them, ; ; Weighting coefficient Obtained through training with historical data; The judgment thresholds for each stage ( , and The stage judgment function is constructed based on the combination of characteristic functions of three parameters at different stages, obtained through weighted summation. Φ 1, Φ 2, Φ 3, and with threshold , and Compare and take the stage corresponding to the maximum value. For example, when Φ 1> θ 1 and Φ When 1 is at its maximum, it is determined to be the first stage; when Φ 2> θ 2 and Φ When 2 is at its maximum, it is determined to be in the second stage; when Φ 3> θ 3 and Φ When the value is 3 at its maximum, it is determined to be in the third stage.

[0040] Furthermore, the results of the stage determination are used to guide the control strategy of the oxygen lance (lance position and oxygen supply flow rate), and its control formulas all follow the following framework:

[0041] Among them and Depending on the current stage's basic settings, This is the superimposed correction term for each parameter on the gun position. This is a correction factor for the product of each parameter and the flow rate. Simultaneously, the system periodically collects new smelting data, including the final smelting results (endpoint hit status), and uses this new data to retrain the stage judgment model, updating the parameters and weights in the feature function to adapt to changes in production conditions.

[0042] In the first stage (rapid slagging and initial dephosphorization), slagging of low-silicon molten iron is difficult, requiring optimization of the balance between impact and FeO formation through lance position adjustment. The converter oxygen lance position corresponding to the rapid slagging and initial dephosphorization stages is calculated using the following formula:

[0043] in, The converter oxygen lance positions correspond to the rapid slag formation and initial dephosphorization periods. For the basic lance positions corresponding to the rapid slag formation and initial dephosphorization period, , and Adjust the gain coefficients for the first lance position corresponding to the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, respectively. The target slag condition index corresponds to the rapid slag formation and initial dephosphorization period. This is the dephosphorization initiation threshold. This is the initial value of the carbon-oxygen product when blowing begins.

[0044] Specifically, The basic lance position for the first stage is set according to the Si and P content of the molten iron (the lower the Si content of the molten iron, the higher the basic lance position should be to compensate for the heat). The target slag condition index for the first stage is usually set at 0.75; , and The gain coefficients for adjusting the gun position are 0.15, 0.08, and 0.05 m, respectively. The dephosphorization initiation threshold is set to 0.4; The initial CPR value is shown at the start of the blowing process. Among them, SCI is the dominant slag formation control item. When the real-time detected SCI value is lower than the target, the system will lower the oxygen lance position to enhance the jet impact. When the SCI value is close to the target, the system will raise the lance position to promote FeO formation. DDEF is the dominant dephosphorization start-up item. When DDEF exceeds the threshold (dephosphorization reaction effectively starts), the lance position will be moderately raised to strengthen the slag-steel dephosphorization interface. CPR is the decarburization early warning item (the more negative this item is, the faster the CPR decreases, the earlier the decarburization starts. The lance position can be moderately lowered to prepare for the upcoming strong decarburization period.

[0045] The oxygen flow rate of the converter oxygen lance corresponding to the rapid slag formation and initial dephosphorization periods is calculated using the following formula:

[0046] in, The oxygen flow rate of the converter oxygen lance corresponding to the rapid slag formation and initial dephosphorization period. The baseline oxygen flow rate corresponding to the rapid slag formation and initial dephosphorization period, , and These are the flow compensation coefficients corresponding to the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, respectively. The target dynamic dephosphorization efficiency factor is defined as the factor corresponding to the rapid slag formation and the initial dephosphorization period.

[0047] Specifically, This is the basic oxygen flow rate for the first stage. , and These are the flow compensation coefficients, taken as 0.3, 0.4, and 0.5 respectively; Take 0.8 as a reference value; when the slag condition is poor, increase the oxygen flow rate appropriately to promote slag formation; when the dephosphorization efficiency is low, increase the oxygen flow rate appropriately to improve the slag oxidizability; when the CPR decreases after decarbonization starts, gradually increase the oxygen flow rate to build up momentum for the second stage of strong decarbonization.

[0048] In the second stage (enhanced decarburization and dynamic dephosphorization period), there is kinetic competition between decarburization and dephosphorization in the molten pool. While the CPR decreases rapidly (strong decarburization), it is necessary to maintain the continuous dephosphorization of DDEF appropriately and rely on SCI feedback to prevent process instability.

[0049] The converter oxygen lance position corresponding to the enhanced decarburization and dynamic dephosphorization stages is calculated using the following formula:

[0050] in, The converter oxygen lance positions corresponding to the enhanced decarburization and dynamic dephosphorization stages. The basic gun positions corresponding to the enhanced decarbonization and dynamic dephosphorization stages. , and The gain coefficient for the second lance position is adjusted to correspond to the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, respectively. As a factor influencing the slag condition index, This is the lower limit of the slag condition index. To enhance the reference value of the dynamic dephosphorization efficiency factor in the decarbonization and dynamic dephosphorization stages, The carbon-oxygen product value is required to enter the enhanced decarbonization and dynamic dephosphorization stage. The equilibrium constant for the carbon-oxygen reaction. The slag condition index, This is the dynamic dephosphorization efficiency factor. It is the carbon-oxygen product.

[0051] Specifically, This is the basic gun position for the second stage. , and The values ​​were taken as 0.25, 0.1, and 0.08 m, respectively. The lower limit of the slag condition index is set at a reference value of 0.65. The reference value for the second stage is 0.7; The sigmoid function outputs a value close to 0 when the SCI approaches its lower limit. When SCI is safe, the Sigmoid output is close to 1, and this term is close to 0. The CPR value for entering the second stage is set to 0.008; is the equilibrium constant for the carbon-oxygen reaction, taken as 0.0025.

[0052] The oxygen flow rate of the converter oxygen lance corresponding to the enhanced decarburization and dynamic dephosphorization stages is calculated using the following formula:

[0053] in, The oxygen flow rate of the converter oxygen lance corresponding to the enhanced decarburization and dynamic dephosphorization stages. The baseline oxygen flow rate corresponding to the enhanced decarbonization and dynamic dephosphorization stages, This represents the optimal value of the dynamic dephosphorization efficiency factor corresponding to the dynamic dephosphorization stage.

[0054] Specifically, This is the baseline oxygen flow rate for the second stage. Take 0.6. When DDEF is higher than the optimal value, maintain or slightly increase the oxygen content to utilize the high phosphorus removal efficiency. When DDEF is lower than the optimal value, appropriately reduce the oxygen content.

[0055] In the third stage (endpoint coordination and precision control period), the reaction nears equilibrium at the end of the blowing process. The lance position is used as a fine-tuning tool to stabilize the SCI at the ideal endpoint slag condition of 0.85, achieving precise targeting of carbon, phosphorus, temperature, etc. at the end point. During this stage, the lance position and oxygen flow rate adopt relatively high and stable baseline setpoints. and This can be supplemented with fine-tuning at the endpoint compensation.

[0056] C4, the execution and feedback layer, is where the actuators change the reaction state of the molten pool, thereby generating new process signals and forming a closed loop.

[0057] Throughout the smelting process, the above steps are continuously repeated to adapt to changes in production technology and equipment performance, ensuring that the molten pool reaction is always in a controlled and optimal state. Its intelligent control and decision-making rules follow... Figure 2The closed-loop process shown is running.

[0058] The following describes the implementation steps of the method described in this invention in detail, using a converter with a nominal capacity of 120 t as an example and combining specific process parameters. This embodiment is only for illustrating the invention and is not intended to limit the scope of protection of the invention.

[0059] Step 1, Parameter Input and System Preparation: 115 t of low-silicon, high-phosphorus molten iron (Si=0.25%, P=0.18%, temperature T=1316℃) and 27.4 t of scrap steel are charged into the converter; the weight, composition, and temperature data of the molten iron, as well as the scrap steel ratio and target steel grade requirements (endpoint [C]=0.05%, [P]≤0.010%, tapping temperature 1620℃) are used as initial input conditions. The system automatically loads the initial model parameter library matching the "low-silicon, high-phosphorus" process mode and extracts the judgment thresholds for each stage (…). =0.75、 and =0.65), gun position and oxygen flow rate baseline value ( =1.5 m and =25800 Nm 3 / h), etc. The "1.5 m" mentioned above refers to the vertical distance of 1.5 m between the molten steel surface and the oxygen lance head.

[0060] Step 2, Equipment Start-up and Inspection: Start the oxygen lance and lower it to the blowing position; turn on the sonar slagging instrument and the furnace gas analyzer, check if the signals are normal, check the readiness status of the auxiliary lance system, and confirm that the slag condition index (SCI) and dynamic dephosphorization efficiency factor (DDEF) real-time calculation module are operating normally.

[0061] Step 3, Stage Judgment and Oxygen Lance Control: At the start of blowing (the first stage), there is no slag in the furnace, the initial SCI value is very low, the dephosphorization reaction is slow, and DDEF is low. As blowing progresses, the added lime, lightly calcined dolomite, and other slag-forming agents gradually melt, while silicon, manganese, phosphorus, and other elements in the molten iron are oxidized. The slag volume gradually increases, the SCI rises rapidly, and the slag basicity and oxidizing power increase, accelerating the dephosphorization reaction and causing DDEF to rise rapidly as well. When the slag is fully formed, the dephosphorization reaction reaches its maximum rate, and DDEF reaches its peak value. Due to the high carbon content (approximately 4%) and low oxygen activity in the initial stage of blowing, the CPR is very high. This stage is dominated by slag formation and dephosphorization, and the decarburization reaction has not yet become dominant. The system calculates and monitors the changes in SCI, DDEF, and CPR in real time. The formula for determining the optimal lance position in this stage is:

[0062] Among them, based on the molten iron composition of Si=0.25% and P=0.18%, the first stage basic lance position Take 1.5 m; The target slag condition index for the first stage is set at 0.75; , and The gain coefficients for adjusting the gun position are 0.15, 0.08, and 0.05 m, respectively. The dephosphorization initiation threshold is set to 0.4; The initial CPR value at the start of blowing is >0.02. Among these, SCI is the primary slag-forming control factor. When the real-time detected SCI value is lower than the target, the system will lower the oxygen lance position to enhance jet impact; when the SCI value is close to the target, the system will raise the lance position to promote FeO formation. DDEF is the primary dephosphorization initiation factor. When DDEF exceeds the threshold (effective initiation of the dephosphorization reaction), the lance position will be moderately raised to strengthen the slag-steel dephosphorization interface. CPR is the decarburization early warning factor (the more negative this factor is, the faster the CPR decreases, the earlier the decarburization starts; the lance position can be moderately lowered to prepare for the upcoming strong decarburization period. During this stage, the oxygen supply flow rate (Q) remains moderate and stable to provide sufficient oxygen for slag formation, but excessive cooling of the molten pool should be avoided. It can be calculated using the following formula:

[0063] in, The basic oxygen flow rate for the first stage is set at 25800 Nm³. 3 / h, , and These are the flow compensation coefficients, taken as 0.3, 0.4, and 0.5 respectively; Take 0.8; when the slag condition in the furnace is poor, increase the oxygen flow rate appropriately to promote slag formation; when the dephosphorization efficiency is low, increase the oxygen flow rate appropriately to improve the slag oxidizability; when the CPR decreases after decarburization starts, gradually increase the oxygen flow rate to build up momentum for the second stage.

[0064] The determination of the converter oxygen lance control stage based on slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product includes: If the slag condition index is determined to be within the first preset slag condition index range and the duration reaches the preset duration, and the dynamic dephosphorization efficiency factor is within the preset dynamic dephosphorization efficiency factor range and the rate of change is less than or equal to the preset rate of change threshold, and the carbon-oxygen product value reaches the first preset carbon-oxygen product threshold, then the current converter oxygen lance control stage is determined to be the enhanced decarburization and dynamic dephosphorization stage. The first preset slag condition index range can be set independently based on actual conditions, and can be around 0.75, specifically between 0.72 and 0.77. The preset duration can be set independently based on actual conditions, and can be 30 seconds. The preset dynamic dephosphorization efficiency factor range can be set independently based on actual conditions, and can be around 0.8, specifically between 0.78 and 0.82. The preset rate of change threshold can be set independently based on actual conditions, specifically, the change in the dynamic data of the subsequent dynamic dephosphorization efficiency factor compared to the previous dynamic dephosphorization efficiency factor is the product of the previous dynamic dephosphorization efficiency factor dynamic data and 10%. The first preset carbon-oxygen product threshold can be set independently based on actual conditions, and can be 0.007 or 0.008.

[0065] when It remained stable at around 0.75 for 30 seconds. It reached a peak of around 0.8 and then changed gradually. The temperature drops from the initial value to approximately 0.007-0.008 (a clear downward trend), entering the second stage (enhanced decarburization and dynamic dephosphorization). In this stage, decarburization and dephosphorization in the molten pool exhibit kinetic competition. While the CPR decreases rapidly (strong decarburization), it is necessary to appropriately maintain continuous DDEF dephosphorization, relying on SCI feedback to prevent process instability. The lance position control formula is as follows:

[0066] The second stage basic gun position =1.4 m, , and The values ​​were taken as 0.25, 0.1, and 0.08 m, respectively. The lower limit of the slag condition index is set at a reference value of 0.65. The reference value for the second stage is 0.7; The sigmoid function outputs a value close to 0 when the SCI approaches its lower limit. When SCI is safe, the Sigmoid output is close to 1, and this term is close to 0. The CPR value for entering the second stage is set to 0.008; The carbon-oxygen reaction equilibrium constant is taken as 0.0025; the oxygen flow rate in the second stage is based on a high flow rate, and its oxygen supply flow rate control formula is as follows:

[0067] Among them The basic oxygen flow rate for the second stage is 27,500 Nm³. 3 / h, Take 0.6. When DDEF is higher than the optimal value, maintain or slightly increase the oxygen content to utilize the high phosphorus removal efficiency. When DDEF is lower than the optimal value, appropriately reduce the oxygen content.

[0068] The determination of the converter oxygen lance control stage based on slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product includes: If it is determined that the slag condition index is within the second preset slag condition index range, and the dynamic dephosphorization efficiency factor continues to decrease to below the preset dynamic dephosphorization efficiency factor threshold, and the carbon-oxygen product value decreases to below the second preset carbon-oxygen product threshold, then the current converter oxygen lance control stage is determined as the endpoint coordination and precision control stage. The second preset slag condition index range has a lower limit greater than the first preset slag condition index range, a preset dynamic dephosphorization efficiency factor threshold less than the lower limit of the preset dynamic dephosphorization efficiency factor range, and a second preset carbon-oxygen product threshold less than the first preset carbon-oxygen product threshold. The second preset slag condition index range can be set independently based on actual conditions, and can be selected as approximately 0.85, specifically 0.83-0.87. That is, the lower limit of the second preset slag condition index range (0.83) is greater than the upper limit of the first preset slag condition index range (0.77). A continuous decrease in the dynamic dephosphorization efficiency factor can be understood as each determined dynamic dephosphorization efficiency factor value being smaller than the previously determined value. The preset dynamic dephosphorization efficiency factor threshold can be set independently based on actual conditions, and can be selected as 0.2. The second preset carbon-oxygen product threshold can be set independently based on actual conditions, and can be selected as 0.003.

[0069] When detected It continued to decline to below 0.2. It has stabilized at around 0.85. When the value drops below 0.003, it is considered to have entered the third stage (the endpoint coordination and precision control period), at which point the basic gun position is determined. Stabilize at around 1.5 m, basic oxygen flow rate Adjusted to 26500 Nm 3 / h. This stage can be combined with secondary gun detection data and supplemented with endpoint compensation fine-tuning to form a closed loop of "prediction-detection-correction" to achieve accurate hits on endpoint carbon, phosphorus, temperature, etc. When the system continuously predicts that the endpoint [C], [P], and T all fall within the target tolerance range (e.g., ±0.005% [C], ±0.002% [P], ±10℃), the system issues a stop oxygenation and gun lifting command.

[0070] Step 5, Effect Evaluation and Model Update: Collect the final test results (e.g., [C]=0.048%, [P]=0.009%, T=1622℃) and the complete blowing log. Compare and analyze the actual results with the predicted values ​​and control commands at each stage, calculate the control deviation, and finally use the smelting data to fine-tune and optimize some weight coefficients in the parameters and decision rules of the dynamic prediction model to achieve continuous self-learning and performance improvement of the system.

[0071] The intelligent control method for converter oxygen lance based on low-silicon, high-phosphorus molten iron provided in this invention has the following beneficial technical effects: 1. This invention fundamentally solves the core contradiction of difficult slag formation and intense competition between dephosphorization and decarburization in the smelting of low-silicon and high-phosphorus molten iron by constructing a real-time sensing system based on the Slag Condition Index (SCI), Dynamic Dephosphorization Efficiency Factor (DDEF), and Carbon-Oxygen Product (CPR) and implementing "three-stage adaptive intelligent control". It realizes the fine control of the metallurgical reaction throughout the entire process and provides a solid technical guarantee for the stable and efficient production of high-quality steel, especially low-phosphorus steel.

[0072] 2. This invention transforms the traditional "slag watching" and "fire watching" operations, which rely on worker experience, into closed-loop intelligent control driven by quantitative parameters such as SCI, DDEF, and CPR. This realizes the transformation of the smelting process from "experience-driven" to "data and mechanism model-driven". The system can perceive the state of the molten pool in real time and automatically decide the optimal lance position and oxygen supply strategy. It can dynamically suppress abnormal conditions such as splashing and re-drying, reduce the over-reliance on the personal experience of operators, and significantly improve process stability and operational standardization.

[0073] 3. This invention, based on precise demand assessment using real-time state parameters (SCI, DDEF, CPR), enables on-demand supply and process optimization of materials such as oxygen and slagging agents. At the blowing endpoint, it innovatively employs a three-parameter composite criterion to achieve precise braking and stopping of blowing, avoiding over-blowing and resource waste caused by trying to ensure dephosphorization, thus aligning with the direction of green, low-carbon, and sustainable development.

[0074] The intelligent control method for converter oxygen lances based on low-silicon, high-phosphorus molten iron provided in this invention obtains slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product based on converter molten pool status information; determines the converter oxygen lance control stage based on the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product; and determines the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage based on the dynamic real-time data of the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, as well as preset parameters corresponding to the current converter oxygen lance control stage; and controls the corresponding actuators to perform actions based on the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage, thereby achieving intelligent control of the converter oxygen lance and enabling stable, efficient, and precise control of the low-silicon, high-phosphorus molten iron smelting process.

[0075] In the above optional embodiments, the determination of the converter oxygen lance control stage based on the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product includes: If the slag condition index is determined to be within the first preset slag condition index range and the duration reaches the preset duration, and the dynamic dephosphorization efficiency factor is within the preset dynamic dephosphorization efficiency factor range and the rate of change is less than or equal to the preset rate of change threshold, and the carbon-oxygen product value reaches the first preset carbon-oxygen product threshold, then the current converter oxygen lance control stage is determined to be the enhanced decarburization and dynamic dephosphorization stage. This can be referred to the above embodiments for explanation and will not be repeated here.

[0076] In the above optional embodiments, the determination of the converter oxygen lance control stage based on the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product includes: If the slag condition index is determined to be within the second preset slag condition index range, and the dynamic dephosphorization efficiency factor continues to decrease to below the preset dynamic dephosphorization efficiency factor threshold, and the carbon-oxygen product value decreases to below the second preset carbon-oxygen product threshold, then the current converter oxygen lance control stage is determined to be the endpoint coordination and precision control stage; the above embodiments can be referred to for explanation, and will not be repeated here.

[0077] Wherein, the lower limit of the second preset slag condition index range is greater than the upper limit of the first preset slag condition index range, the preset dynamic dephosphorization efficiency factor threshold is less than the lower limit of the preset dynamic dephosphorization efficiency factor range, and the second preset carbon-oxygen product threshold is less than the first preset carbon-oxygen product threshold. This can be referred to the above embodiments for further explanation and will not be repeated here.

[0078] In the above optional embodiments, the current converter oxygen lance control stage is an enhanced decarburization and dynamic dephosphorization stage; correspondingly, determining the converter oxygen lance position and converter oxygen lance oxygen flow rate corresponding to the current converter oxygen lance control stage based on the dynamic real-time data of slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, as well as preset parameters corresponding to the current converter oxygen lance control stage, includes: The converter oxygen lance position corresponding to the enhanced decarburization and dynamic dephosphorization stages is calculated using the following formula:

[0079] in, The converter oxygen lance positions corresponding to the enhanced decarburization and dynamic dephosphorization stages. The basic gun positions corresponding to the enhanced decarbonization and dynamic dephosphorization stages. , and The gain coefficient for the second lance position is adjusted to correspond to the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, respectively. As a factor influencing the slag condition index, This is the lower limit of the slag condition index. To enhance the reference value of the dynamic dephosphorization efficiency factor in the decarbonization and dynamic dephosphorization stages, The carbon-oxygen product value is required to enter the enhanced decarbonization and dynamic dephosphorization stage. The equilibrium constant for the carbon-oxygen reaction. The slag condition index, This is the dynamic dephosphorization efficiency factor. The carbon-oxygen product is used; please refer to the above examples for further explanation, which will not be repeated here.

[0080] The oxygen flow rate of the converter oxygen lance corresponding to the enhanced decarburization and dynamic dephosphorization stages is calculated using the following formula:

[0081] in, The oxygen flow rate of the converter oxygen lance corresponding to the enhanced decarburization and dynamic dephosphorization stages. The baseline oxygen flow rate corresponding to the enhanced decarbonization and dynamic dephosphorization stages, This represents the optimal value of the dynamic dephosphorization efficiency factor corresponding to the dynamic dephosphorization stage. Refer to the above examples for further details.

[0082] In the above optional embodiments, the current converter oxygen lance control stage is the rapid slagging and initial dephosphorization period; correspondingly, determining the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage based on the dynamic real-time data of slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, as well as preset parameters corresponding to the current converter oxygen lance control stage, includes: The converter oxygen lance position corresponding to the rapid slag formation and initial dephosphorization periods is calculated using the following formula:

[0083] in, The converter oxygen lance positions correspond to the rapid slag formation and initial dephosphorization periods. For the basic lance positions corresponding to the rapid slag formation and initial dephosphorization period, , and Adjust the gain coefficients for the first lance position corresponding to the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, respectively. The target slag condition index corresponds to the rapid slag formation and initial dephosphorization period. This is the dephosphorization initiation threshold. This is the initial value of the carbon-oxygen product when the blowing begins; please refer to the above examples for further explanation, which will not be repeated here.

[0084] The oxygen flow rate of the converter oxygen lance corresponding to the rapid slag formation and initial dephosphorization periods is calculated using the following formula:

[0085] in, The oxygen flow rate of the converter oxygen lance corresponding to the rapid slag formation and initial dephosphorization period. The baseline oxygen flow rate corresponding to the rapid slag formation and initial dephosphorization period, , and These are the flow compensation coefficients corresponding to the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, respectively. This refers to the target dynamic dephosphorization efficiency factor corresponding to the rapid slag formation and initial dephosphorization period. Refer to the above examples for further details; no further elaboration will be provided.

[0086] In the above optional embodiments, after the step of realizing intelligent control of the converter oxygen lance, the intelligent control method of the converter oxygen lance based on low-silicon, high-phosphorus molten iron further includes: The calculation model evaluation results for the converter oxygen lance position and oxygen flow rate corresponding to each converter oxygen lance control stage can be obtained; please refer to the above embodiments for explanation, and will not be repeated here.

[0087] The preset parameters in the calculation models corresponding to each converter oxygen lance control stage are updated based on the evaluation results of the calculation model. This can be referred to the above embodiments for further explanation, and will not be repeated here.

[0088] Figure 3 This is a schematic diagram of the structure of an intelligent control device for a converter oxygen lance based on low-silicon, high-phosphorus molten iron, according to an embodiment of the present invention. Figure 3 As shown in the embodiment of the present invention, the intelligent control device for a converter oxygen lance based on low-silicon, high-phosphorus molten iron includes an acquisition unit 301, a determination unit 302, and a control unit 303, wherein: The acquisition unit 301 is used to acquire the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product based on the converter molten pool status information; the determination unit 302 is used to determine the converter oxygen lance control stage based on the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, and to determine the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage based on the dynamic real-time data of the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, as well as the preset parameters corresponding to the current converter oxygen lance control stage; the control unit 303 is used to control the corresponding actuators to perform actions based on the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage, so as to realize intelligent control of the converter oxygen lance.

[0089] Specifically, the acquisition unit 301 in the device is used to acquire the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product based on the converter molten pool status information; the determination unit 302 is used to determine the converter oxygen lance control stage based on the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, and to determine the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage based on the dynamic real-time data of the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, as well as the preset parameters corresponding to the current converter oxygen lance control stage; the control unit 303 is used to control the corresponding actuators to perform actions based on the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage, so as to realize intelligent control of the converter oxygen lance.

[0090] The intelligent control device for converter oxygen lances based on low-silicon, high-phosphorus molten iron provided in this invention obtains slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product based on converter molten pool status information; determines the converter oxygen lance control stage based on the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product; and determines the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage based on the dynamic real-time data of the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, as well as preset parameters corresponding to the current converter oxygen lance control stage; and controls the corresponding actuators to perform actions based on the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage, so as to realize intelligent control of the converter oxygen lance and achieve stable, efficient, and precise control of the low-silicon, high-phosphorus molten iron smelting process.

[0091] The embodiments of the present invention provide an intelligent control device for a converter oxygen lance based on low-silicon, high-phosphorus molten iron. Specifically, it can be used to execute the processing flow of the above-described method embodiments. Its functions will not be repeated here, but can be referred to the detailed description of the above-described method embodiments.

[0092] Figure 4 This is a schematic diagram of the physical structure of a computer device provided in an embodiment of the present invention, such as... Figure 4As shown, the computer device includes: a memory 401, a processor 402, and a computer program stored in the memory 401 and executable on the processor 402. When the processor 402 executes the computer program, it implements the following method: The slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product are obtained based on the converter molten pool status information. The converter oxygen lance control stage is determined based on the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product. Based on the dynamic real-time data of the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, as well as the preset parameters corresponding to the current converter oxygen lance control stage, the converter oxygen lance position and converter oxygen lance oxygen flow rate corresponding to the current converter oxygen lance control stage are determined. The corresponding actuators are controlled according to the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage to achieve intelligent control of the converter oxygen lance.

[0093] This embodiment discloses a computer program product, which includes a computer program that, when executed by a processor, implements the following method: The slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product are obtained based on the converter molten pool status information. The converter oxygen lance control stage is determined based on the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product. Based on the dynamic real-time data of the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, as well as the preset parameters corresponding to the current converter oxygen lance control stage, the converter oxygen lance position and converter oxygen lance oxygen flow rate corresponding to the current converter oxygen lance control stage are determined. The corresponding actuators are controlled according to the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage to achieve intelligent control of the converter oxygen lance.

[0094] This embodiment provides a computer-readable storage medium storing a computer program that, when executed by a processor, implements the following method: The slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product are obtained based on the converter molten pool status information. The converter oxygen lance control stage is determined based on the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product. Based on the dynamic real-time data of the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, as well as the preset parameters corresponding to the current converter oxygen lance control stage, the converter oxygen lance position and converter oxygen lance oxygen flow rate corresponding to the current converter oxygen lance control stage are determined. The corresponding actuators are controlled according to the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage to achieve intelligent control of the converter oxygen lance.

[0095] Compared with existing technologies, the intelligent control method for converter oxygen lances based on low-silicon, high-phosphorus molten iron provided in this invention obtains slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product based on converter molten pool status information; determines the converter oxygen lance control stage based on the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product; and determines the converter oxygen lance position and oxygen flow rate corresponding to the current control stage based on the dynamic real-time data of the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, as well as preset parameters corresponding to the current control stage; and controls the corresponding actuators to perform actions based on the converter oxygen lance position and oxygen flow rate corresponding to the current control stage, thereby achieving intelligent control of the converter oxygen lance and enabling stable, efficient, and precise control of the low-silicon, high-phosphorus molten iron smelting process.

[0096] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0097] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0098] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0099] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0100] In the description of this specification, the references to terms such as "an embodiment," "a specific embodiment," "some embodiments," "for example," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0101] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above descriptions are merely specific embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A smart control method for a converter oxygen lance based on low-silicon, high-phosphorus molten iron, characterized in that, include: The slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product are obtained based on the converter molten pool status information. The converter oxygen lance control stage is determined based on the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product. Based on the dynamic real-time data of the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, as well as the preset parameters corresponding to the current converter oxygen lance control stage, the converter oxygen lance position and converter oxygen lance oxygen flow rate corresponding to the current converter oxygen lance control stage are determined. The corresponding actuators are controlled according to the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage to achieve intelligent control of the converter oxygen lance.

2. The intelligent control method for converter oxygen lance based on low-silicon, high-phosphorus molten iron according to claim 1, characterized in that, The determination of the converter oxygen lance control stage based on slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product includes: If the slag condition index is determined to be within the first preset slag condition index range and the duration reaches the preset duration, and the dynamic dephosphorization efficiency factor is within the preset dynamic dephosphorization efficiency factor range and the rate of change is less than or equal to the preset rate of change threshold, and the carbon-oxygen product value reaches the first preset carbon-oxygen product threshold, then the current converter oxygen lance control stage is determined to be the enhanced decarburization and dynamic dephosphorization stage.

3. The intelligent control method for converter oxygen lance based on low-silicon, high-phosphorus molten iron according to claim 2, characterized in that, The determination of the converter oxygen lance control stage based on slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product includes: If it is determined that the slag condition index is within the second preset slag condition index range, and the dynamic dephosphorization efficiency factor continues to decrease to below the preset dynamic dephosphorization efficiency factor threshold, and the carbon-oxygen product value decreases to below the second preset carbon-oxygen product threshold, then the current converter oxygen lance control stage is determined as the endpoint coordination and precision control stage. Wherein, the lower limit of the second preset slag condition index range is greater than the upper limit of the first preset slag condition index range, the preset dynamic dephosphorization efficiency factor threshold is less than the lower limit of the preset dynamic dephosphorization efficiency factor range, and the second preset carbon-oxygen product threshold is less than the first preset carbon-oxygen product threshold.

4. The intelligent control method for converter oxygen lance based on low-silicon, high-phosphorus molten iron according to claim 3, characterized in that, The current converter oxygen lance control stage is an enhanced decarburization and dynamic dephosphorization stage; correspondingly, determining the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage based on dynamic real-time data of slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, as well as preset parameters corresponding to the current converter oxygen lance control stage, includes: The converter oxygen lance position corresponding to the enhanced decarburization and dynamic dephosphorization stages is calculated using the following formula: in, The converter oxygen lance positions corresponding to the enhanced decarburization and dynamic dephosphorization stages. The basic gun positions corresponding to the enhanced decarbonization and dynamic dephosphorization stages, , and The gain coefficient for the second lance position is adjusted to correspond to the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, respectively. As a factor influencing the slag condition index, This is the lower limit of the slag condition index. To enhance the reference value of the dynamic dephosphorization efficiency factor in the decarbonization and dynamic dephosphorization stages, The carbon-oxygen product value is required to enter the enhanced decarbonization and dynamic dephosphorization stage. The equilibrium constant for the carbon-oxygen reaction. The slag condition index, This is the dynamic dephosphorization efficiency factor. It is the carbon-oxygen product; The oxygen flow rate of the converter oxygen lance corresponding to the enhanced decarburization and dynamic dephosphorization stages is calculated using the following formula: in, The oxygen flow rate of the converter oxygen lance corresponding to the enhanced decarburization and dynamic dephosphorization stages. The baseline oxygen flow rate corresponding to the enhanced decarbonization and dynamic dephosphorization stages, This represents the optimal value of the dynamic dephosphorization efficiency factor corresponding to the dynamic dephosphorization stage.

5. The intelligent control method for converter oxygen lance based on low-silicon, high-phosphorus molten iron according to claim 4, characterized in that, The current converter oxygen lance control stage is the rapid slag formation and initial dephosphorization period; correspondingly, determining the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage based on dynamic real-time data of slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, as well as preset parameters corresponding to the current converter oxygen lance control stage, includes: The converter oxygen lance position corresponding to the rapid slag formation and initial dephosphorization periods is calculated using the following formula: in, The converter oxygen lance positions correspond to the rapid slag formation and initial dephosphorization periods. The basic lance position corresponds to the rapid slag formation and initial dephosphorization period. , and Adjust the gain coefficients for the first lance position corresponding to the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, respectively. The target slag condition index corresponds to the rapid slag formation and initial dephosphorization period. This is the dephosphorization initiation threshold. This is the initial value of the carbon-oxygen product at the start of blowing; The oxygen flow rate of the converter oxygen lance corresponding to the rapid slag formation and initial dephosphorization periods is calculated using the following formula: in, The oxygen flow rate of the converter oxygen lance corresponding to the rapid slag formation and initial dephosphorization period. The baseline oxygen flow rate corresponding to the rapid slag formation and initial dephosphorization period, , and These are the flow compensation coefficients corresponding to the slag condition index, dynamic dephosphorization efficiency factor, and carbon-oxygen product, respectively. The target dynamic dephosphorization efficiency factor is defined as the factor corresponding to the rapid slag formation and the initial dephosphorization period.

6. The intelligent control method for converter oxygen lance based on low-silicon, high-phosphorus molten iron according to any one of claims 1 to 5, characterized in that, Following the step of achieving intelligent control of the converter oxygen lance, the intelligent control method for the converter oxygen lance based on low-silicon, high-phosphorus molten iron further includes: The calculation model evaluation results of the converter oxygen lance position and converter oxygen lance oxygen flow rate corresponding to each converter oxygen lance control stage are obtained. The preset parameters in the calculation models corresponding to each converter oxygen lance control stage are updated based on the evaluation results of the calculation models.

7. An intelligent control device for a converter oxygen lance based on low-silicon, high-phosphorus molten iron, characterized in that, include: The acquisition unit is used to acquire slag condition index, dynamic dephosphorization efficiency factor and carbon-oxygen product based on converter molten pool status information; The determination unit is used to determine the converter oxygen lance control stage based on the slag condition index, dynamic dephosphorization efficiency factor and carbon-oxygen product, and to determine the converter oxygen lance position and converter oxygen lance oxygen flow rate corresponding to the current converter oxygen lance control stage based on the dynamic real-time data of the slag condition index, dynamic dephosphorization efficiency factor and carbon-oxygen product and the preset parameters corresponding to the current converter oxygen lance control stage. The control unit is used to control the corresponding actuators to perform actions based on the converter oxygen lance position and oxygen flow rate corresponding to the current converter oxygen lance control stage, so as to achieve intelligent control of the converter oxygen lance.

8. A computer 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 computer program, it implements the method of any one of claims 1 to 6.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores a computer program that, when executed by a processor, implements the method of any one of claims 1 to 6.

10. A computer program product, characterized in that, The computer program product includes a computer program that, when executed by a processor, implements the method of any one of claims 1 to 6.

Images