Core-spun yarn feeding speed accurate control system and method thereof

Abstract

The invention provides a cored wire feeding speed accurate control system and method, and relates to the technical field of program control systems.The depth of molten iron in a ladle is divided into a deep layer, a middle layer and a surface layer, linkage factors are defined, and a layered dynamic optimization control strategy is implemented on the basis; layered fine control is achieved through the adjusted wire feeding speed, the resource utilization rate is improved, the problem that the speeds of all layers are not matched is effectively solved by combining linkage factors between different layers and dynamically correcting the proportion value, and optimization coordination and operation efficiency of the whole system are ensured; dependence on manual operation is reduced, the automation level of the production process is improved, the device adapts to the complex smelting environment, and more accurate and stable production quality is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of program control systems, and in particular to a cored wire feeding speed precision control system and method thereof. Background Art

[0002] Cored wire technology is a crucial component of modern steelmaking. By encapsulating powders or particles of a specific composition within a thin metal sheet, the wire material is then released into molten iron, enabling the precise addition of alloying elements and the effective removal of impurities. With the continuous development of the steel industry, the use of cored wire in hot metal refining is becoming increasingly widespread. However, traditional cored wire delivery technology relies primarily on worker experience and judgment, lacking a systematic control strategy. This not only leads to inefficient resource utilization but can also cause fluctuations in product quality. Existing automated systems still suffer from shortcomings such as insufficient control accuracy and poor adaptability to varying molten iron conditions. In particular, when dealing with complex melting conditions, inaccurate control of the release depth can be a problem, impacting overall efficiency. In particular, when multiple cored wires are separately introduced into the ladle, the control of the wire feed speeds for the deep, intermediate, and surface layers cannot be dynamically adjusted and optimized, which can easily lead to excessively rapid release of the material, localized failure, uneven coverage, and spillage and contamination.

[0003] The prior art, with publication number CN112458233A, is titled "A blast point measurement and control technology for a molten iron wire feeding nodulization process," and includes the following steps: S1. The molten iron ladle is hoisted to a fixed position at the wire feeding station by a crane, and the crane is lifted so that the molten iron ladle contacts the ladle cover, which is then tightly closed on the ladle; S2. A button in the control cabinet is pressed, causing a distance-controllable telescopic device to push a vibration detector to move, causing the vibration detector to contact the outer side of the lower end of the molten iron ladle;

[0004] S3. The wire feeder starts feeding wire into the molten iron ladle. S4. The cored wire will explode when it melts in the molten iron, causing the ladle to vibrate violently. The detonation position is measured by two vibrators placed at a 90-degree angle to ensure measurement accuracy. This allows the system to automatically adjust the wire feeding speed based on the measured time to achieve the optimal detonation position for the wire feeding process, thereby significantly improving the efficiency and work quality of the molten iron wire feeding and nodularization process.

[0005] In existing technologies, due to the lack of detailed plans for layered control and adjustment of wire feeding speed, the steelmaking process often suffers from multiple constraints - including the inability to effectively distribute deep-level resources, resulting in the sedimentation and ineffective consumption of bottom-level resources; the failure of the desulfurization process in the middle layer causes unsatisfactory decarbonization and desulfurization effects, while also affecting the uniformity of sulfide deposition; in the surface layer, too slow speeds often lead to insignificant effects or cause secondary pollution from spills, ultimately resulting in low collaborative efficiency of each layer.

[0006] The above information disclosed in this Background section is only for enhancement of understanding of the background of the present disclosure and therefore it may contain information that does not form the prior art that is already known to a person of ordinary skill in the art. Summary of the Invention

[0007] The object of the present invention is to provide a precise control system for the feeding speed of a cored wire and a method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] The method for accurately controlling the feeding speed of cored wire includes the following specific steps:

[0010] Step S1: Divide the current molten iron depth in the ladle into a deep layer, an intermediate layer, and a surface layer, and initially define linkage factors between different layers in the deep layer, the intermediate layer, and the surface layer;

[0011] Step S2: implementing a first dynamic optimization control strategy on the feeding speed of the deep cored wire to obtain an adjusted deep wire feeding speed;

[0012] Step S3: Implementing a second dynamic optimization control strategy on the wire feeding speed of the middle layer cored wire to obtain an adjusted wire feeding speed of the middle layer;

[0013] Step S4: implementing the third dynamic optimization control strategy on the surface cored wire feeding speed to obtain an adjusted surface wire feeding speed;

[0014] Step S5: respectively obtaining the adjusted deep layer wire feeding speed, middle layer wire feeding speed, and surface layer wire feeding speed for analysis, generating a sorted first proportional value, obtaining a preset proportional value for the first proportional value, combining the linkage factor between different layers and the preset proportional value, correcting the first proportional value, and finally forming a second proportional value;

[0015] Step S6: receiving the second proportional value, and executing corresponding wire feeding speeds for the deep layer, middle layer and surface layer cored wires respectively according to the deep layer wire feeding speed, middle layer wire feeding speed and surface layer wire feeding speed corresponding to the second proportional value.

[0016] A cored wire feeding speed precision control system, the system being used to execute the cored wire feeding speed precision control method, comprising:

[0017] Linkage factor generation module: used to divide the current molten iron depth in the ladle into deep layer, middle layer and surface layer, and initially define the linkage factors between different layers in the deep layer, middle layer and surface layer;

[0018] A first dynamic optimization control strategy generating module: used for implementing a first dynamic optimization control strategy on the feeding speed of the deep cored wire to obtain an adjusted deep wire feeding speed;

[0019] A second dynamic optimization control strategy generating module is used to implement a second dynamic optimization control strategy on the wire feeding speed of the middle layer cored wire to obtain an adjusted wire feeding speed of the middle layer;

[0020] A third dynamic optimization control strategy generating module: used for implementing the third dynamic optimization control strategy on the wire feeding speed of the surface cored wire to obtain an adjusted surface wire feeding speed;

[0021] Correction module: used to obtain the adjusted deep layer wire feeding speed, middle layer wire feeding speed and surface layer wire feeding speed respectively for analysis, generate a sorted first proportional value, obtain a preset proportional value of the first proportional value, combine the linkage factor between different layers and the preset proportional value, correct the first proportional value, and finally form a second proportional value;

[0022] Execution module: used for receiving the second proportional value, and executing corresponding wire feeding speeds for the deep layer, middle layer and surface layer cored wires respectively according to the deep layer wire feeding speed, middle layer wire feeding speed and surface layer wire feeding speed corresponding to the second proportional value.

[0023] Compared with the prior art, the beneficial effects of the present invention are: by dividing the depth of molten iron in the ladle into deep layer, middle layer and surface layer, and defining linkage factors, a layered dynamic optimization control strategy is implemented based on this; fine layered control is achieved through adjusted wire feeding speed, which not only improves resource utilization, but also enhances the efficiency of desulfurization and alloy addition; combining the linkage factors between different layers, dynamically correcting the proportional value, effectively solving the problem of speed mismatch between layers, ensuring the optimization coordination and operational efficiency of the overall system; reducing dependence on manual operation, improving the automation level of the production process, adapting to complex smelting environments, and achieving more accurate and stable production quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the overall method flow of the present invention;

[0025] Figure 2 This is a block diagram of the overall system module of the present invention. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to specific embodiments.

[0027] It should be noted that, unless otherwise defined, the technical or scientific terms used in the present invention should have the usual meanings understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative position relationships. When the absolute position of the object being described changes, the relative position relationship may also change accordingly.

[0028] Example 1:

[0029] See also Figure 1 , the present invention provides a technical solution:

[0030] The precise control method for cored wire feeding speed is applied to three cored wire feeding systems to complete stratified reaction at multiple depths and multiple areas. The specific steps include:

[0031] Step S1: Divide the current molten iron depth in the ladle into a deep layer, an intermediate layer, and a surface layer, and initially define linkage factors between different layers in the deep layer, the intermediate layer, and the surface layer;

[0032] Further explanation: The current molten iron depth in the ladle is recorded as H iron Based on H iron The ladle depth is divided into the following regional layers:

[0033] Deep target depth: z1 d =1.5H iron , z2 d =1.6H iron ;

[0034] Middle layer target depth:

[0035] Surface target depth:

[0036] Among them, z2 d , and Respectively represent the depth of deep target, intermediate target and surface target; where d, m and s represent the index marks of deep, intermediate and surface layers respectively;

[0037] The calculation formula of the initial defined linkage factor is as follows:

[0038]

[0039] Among them, CF i,j is the linkage factor, and the indices i and j represent the combined indices between different layers in the deep layer, the middle layer, and the surface layer; and both i and j are in {d, m, s};

[0040] z i and z j are the actual depths of the two cored wires in the i-th and j-th layers respectively;

[0041] |z i -z j | represents the actual depth difference between layer i and layer j;

[0042] |z i -z j The smaller the value, the greater the interference between different layers; it will cause the deep core wire material to impact the desulfurization reaction of the middle layer;

[0043] Chemical substances released from the deep cored wire (such as active alloying elements) compete with the desulfurizer in the intermediate layer, consuming the active ingredients of the desulfurizer or converting them into ineffective compounds, thereby reducing the efficiency of the desulfurization reaction. For example, calcium released from the deep layer forms stable compounds with sulfur, preventing the sulfur from reacting properly with the desulfurizer. This chemical interference not only prolongs the desulfurization time but also causes the sulfur content in the final molten steel to fail to meet the specified standard, negatively impacting the overall performance of the steel.

[0044] When the depth difference is small, the diffusion areas of the released chemicals will overlap more; this overlap means that the chemical reactions in different layers affect each other, causing the reaction conditions in one layer to be relatively interfered with by the other layer.

[0045] In the case of high interference, fine-tuning the speed of a single cored wire has no noticeable effect, as the chemical reactions of the other layers have already had an unavoidable impact on it.

[0046] At this point, even if the wire feeding speed is adjusted, changes at a single level are unlikely to significantly improve the final metallurgical effect, because the core of the problem lies in the mutual interference of chemical reactions, rather than a simple release timing issue.

[0047] The strategic adjustment of the cored wire is to change the order of the cored wire, redesign the chemical composition of the cored wire, change the depth configuration of the cored wire, etc.; the smaller the need for adjustment of the cored wire feeding speed.

[0048] In this embodiment, the order of replacing the cored wire is:

[0049] Adjust the placement order based on the chemical composition characteristics of each cored wire; specifically, prioritize placing cored wire containing highly reactive elements into the deep layer rather than the middle or surface layer first to reduce interference with chemical reactions in other layers;

[0050] Adjust the time of adding different cored wires on the timeline; add the stable cored wire first, wait for it to complete the reaction, and then add the highly reactive cored wire to prevent the highly reactive cored wire from affecting the effect of the former;

[0051] |z i -z j The larger the value, the less interference there is between different layers; the lower the coordination efficiency of multiple cored wires between different layers; and the higher the need to adjust the cored wire feeding speed. The specific reasons are as follows:

[0052] |z i -z j The greater the difference in depth, the more independent the reactions of the different layers are, and the functions of the cored wires cannot be well combined. The following situations are given in this embodiment:

[0053] If one cored wire is used for desulfurization and the other is used for calcium supplementation to improve the properties of molten steel, but due to the depth difference, the calcium supplementation occurs much earlier than the desulfurization is completed, which will lead to reduced desulfurization efficiency and insignificant calcium supplementation effect;

[0054] This problem of "low synergistic efficiency" is mainly reflected in the fact that the design of multiple cored wires makes it difficult to coordinate the timing and sequence of chemical reactions.

[0055] The wire feed speed determines the timing and efficiency of chemical release. If the depth difference is large, the functional connection between the different layers will be weaker. During operation, the wire feed speed needs to be precisely adjusted to compensate and achieve the best synergy of the reaction.

[0056] This embodiment includes but is not limited to the following situations: when it is necessary to achieve both desulfurization and deoxidation goals, the desulfurizer core wire feeding speed is required to be slower to extend its reaction time, while the deoxidizer wire feeding speed needs to be faster to ensure timely release and completion of the reaction;

[0057] H iron is the current depth of molten iron in the ladle;

[0058] Φ ij is the chemical reaction intensity ratio between the i-th layer and the j-th layer; the chemical reaction intensity ratio Φ ij The value range is [0,1], where 1 indicates the maximum reaction intensity and 0 indicates no reaction;

[0059] In this embodiment, the “chemical reaction intensity ratio” represents the ratio of the byproduct generation rate or reactant consumption rate or reaction completion degree between the i-th layer and the j-th layer;

[0060] The by-product generation rate is characterized by online gas concentration monitoring:

[0061] By measuring the gas concentration and generation rate of reaction by-products, the reaction intensity can be reflected in real time.

[0062] Equipment: Gas chromatograph, sensor array;

[0063] Application: Monitor the intensity of desulfurization reaction by SO2 concentration rising rate, or monitor CO to characterize the spheroidizing agent release stage.

[0064] Reactant consumption rates were characterized by X-ray / spectroscopy monitoring:

[0065] Measurement is done by changes in the composition or concentration of reactants or products. For example:

[0066] X-ray fluorescence analysis (XRF) is used to monitor the formation of sulfur compounds or inclusions;

[0067] Laser-induced spectroscopy (LIBS) is used to detect the chemical composition changes of the reaction layer in real time.

[0068] Calorimetry is characterized as the ratio of reaction completion;

[0069] The heat released by the reaction simulates the chemical reaction rate and indirectly represents the reaction intensity.

[0070] Equipment: Differential scanning calorimetry is used to analyze the changes in heat released or absorbed during the reaction.

[0071] (1-Φ ij ) 2 It represents the matching degree of chemical reaction intensity between layer i and layer j;

[0072] Φ ij The greater the deviation from 1, that is, Φ ij The closer it is to 0, the more inconsistent the wire feeding speed or release effect of the i-th layer and the j-th layer is, and the greater the adjustment range of the wire feeding speed of the cored wire is;

[0073] If Φ ij The closer it is to 1, the better the dynamic coordination between the i-th layer and the j-th layer is, and the smaller the adjustment range of the cored wire feeding speed is;

[0074] V ij is the wire feeding speed v of the i-th layer i and the j-th layer wire feeding speed v j The ratio between

[0075] It should be noted that the depth of layer i is lower than the depth of layer j, so that V ij The value range is (0,1);

[0076] If 1-V ij The closer it is to 1, the greater the mismatch between the wire feeding speeds of the i-th layer and the j-th layer; the greater the adjustment of the wire feeding speed of the cored wire needs to be;

[0077] w D 、w Φ 、w V are the weight coefficients of each parameter, which are used to adjust the contribution of the actual depth difference value, chemical reaction intensity and wire feeding speed ratio to the linkage factor;

[0078] w D 、w Φ 、w V The value range is in the interval (0,1); and w D +w Φ +w V =1;

[0079] In this embodiment, w D =0.5,w Φ =0.3,w V =0.2;

[0080] w D 、w Φ 、w V The specific values are determined by the entropy weight method and the fuzzy analytic hierarchy process (FAHP) and will not be described in detail.

[0081] CF i,j The larger the value, the higher the need for adjusting the cored wire feeding speed;

[0082] CF i,j This includes combinations between the following different layers:

[0083] Combination 1: The relationship between the deep layer and the middle layer, the linkage factor is represented by CF d,m ;

[0084] Combination 2: The relationship between the deep layer and the surface layer, the linkage factor is represented by CF d,s ;

[0085] Combination 3: The relationship between the middle layer and the surface layer, the linkage factor is represented by CF m,s .

[0086] Step S2: implementing a first dynamic optimization control strategy on the feeding speed of the deep cored wire to obtain an adjusted deep wire feeding speed;

[0087] Further explanation: The first dynamic optimization control strategy includes:

[0088] The initial setting of the wire feeding speed in the deep initial stage is The wire feeding speed at the deep arrival stage is And set

[0089] And the initial wire feeding speed of the deep layer is set comprehensively as

[0090] like The closer the value is to 0, the and The higher the degree of deviation between them, the faster the cored wire penetrates into the deep layer;

[0091] like The closer the value is to 1, the and The smaller the deviation between them, the more stable the overall wire feeding speed and the smoother the transition of deep target depth;

[0092] This embodiment is set based on process experience and The initial wire feeding speeds are 0.8m / s and 0.6m / s respectively;

[0093] Define the initial wire feed speed in the deep layer The control adjustment formula is as follows:

[0094]

[0095] in, is the initial wire feeding speed in the deep layer,

[0096] α d ·(Δz d ) is the depth bias adjustment term of the deep layer, and Δz d =z2 d -z1 d ;

[0097] β d ·(Φ d -Φ target,d ) is the chemical reaction intensity adjustment term;

[0098] v′ d is the adjusted deep wire feeding speed; CF d,m is the linkage factor between the deep layer d and the middle layer m;

[0099] CF d,s is the linkage factor between the deep layer d and the surface layer s;

[0100] For CF d,m middle The following instructions are given, d and v m Representation and

[0101] CF d,s and CF m,s V in ij The means of representation are the same and will not be repeated here;

[0102] According to the current chemical reaction intensity of the deep layer and the target value of chemical reaction intensity Φ target,d The deviation is used to adjust the initial wire feeding speed in the deep layer

[0103] α d , β d and γ d are the adjustment weights of the corresponding parameters, and α d , β d and γ d The sum of is 1, α d , β d and γ d The values are all within the range of (0, 1);

[0104] α d , β d and γ d The specific values are determined by the entropy weight method and the fuzzy analytic hierarchy process (FAHP) and will not be described in detail.

[0105] The initial stage of deep layer needs fast wire feeding speed, which is beneficial to β d The adjustment range is small;

[0106] The deep arrival stage requires enhanced reaction control, d The adjustment range is large;

[0107] For the melting time adjustment term γ d ·(1 / t melt,d ), t melt,d Indicates the time when the cored wire material in the depth d is completely integrated into the molten iron;

[0108] It should be noted that: Δz d or (Φ d -Φ target,d ) or (1 / t melt,d ) When the value is larger, it means that the depth deviation, chemical reaction intensity deviation and melting time deviation are larger, and it is necessary to increase the initial wire feeding speed in the deep layer;

[0109] When the arrival phase approaches the target depth z2 d =1.6H iron Dynamically adjust the deep wire feeding speed To match the time it takes for the cored wire material to fully blend into the molten iron;

[0110] Dynamically adjust deep wire feeding speed The logic of the strategy is described as follows

[0111] The target depth in the initial stage is z1 d =1.5H iron , the wire feeding speed in the deep initial stage is

[0112] The goal is to quickly deliver the cored wire into the deep layer to avoid reducing the efficiency of the cored wire release due to covering the surface of the molten iron;

[0113] Set higher And weaken the adjustment weight of other items:

[0114] Target depth z2 of the deep arrival phase d =1.6H iron , the wire feeding speed in the deep arrival stage is

[0115] The cored wire has approached the critical reaction area, and the focus of speed adjustment has shifted from depth to chemical reaction completion and stability;

[0116] Relative to Set lower And strengthen the control and adjustment of chemical strength and melting time:

[0117] Dynamic Adjustment:

[0118] If Φ d <0.9Φ target,d , indicating that the chemical reaction intensity is insufficient and β needs to be increased d , so that 0.5 ≥ β d ≥0.3, β d >α d >γ d ; To compensate for the intensity of chemical reactions;

[0119] Set t based on actual experience melt,d The ideal value of t melt,d Higher than the ideal value, in order to avoid the hysteresis problem of complete release of cored wire material, set γ d ≤0.4, thereby reducing the wire feeding speed; thereby ensuring that the cored wire material is completely released without any lag problem. melt,d The ideal value is defined as t melt,d,max ;

[0120] Experimental optimization method sets benchmark by systematically analyzing historical data melt,d value, and then gradually adjust t by step-by-step increase and decrease melt,d After each adjustment, the metallurgical quality is evaluated under the same process conditions; by comparison and statistical analysis, the optimal t melt,d values and their impact on quality, and ultimately verify and apply the best ideal value in production practice melt,d,max To ensure complete material release and optimize metallurgical quality.

[0121] The above melt,d The ideal value of can also be determined by the fuzzy analytic hierarchy process (FAHP);

[0122] Further explanation: This experiment aims to optimize the integration of cored wire material into molten iron by dynamically adjusting the wire feeding speed, thereby increasing resource utilization and improving chemical reaction efficiency. The material used in the experiment is a certain alloy type of molten iron, and the cored wire material is composed of alloy elements and reinforcing agents, aiming to promote the stable progress of the chemical reaction.

[0123] In the experimental preparation stage, first determine the wire feeding speed of the deep layer in the initial stage. and the wire feeding speed at the arrival stage of the deep layer The initial values of are set to 0.8m / s and 0.6m / s respectively. This parameter setting ensures that the cored wire can sink quickly in the initial stage of entering the deep layer of molten iron, reducing the risk of reduced efficiency of cored wire release. At the same time, set the deep layer wire feeding speed Adjust between the two.

[0124] During operation, the chemical reaction intensity of the cored wire material into the molten iron is monitored. d and target chemical reaction intensity Φ target,d , and dynamically adjust using the following formula:

[0125]

[0126] In the initial stage of the deep layer, the target depth is set to z1 d =1.5H iron , and according to the feedback of chemical reaction intensity, by adjusting β d The parameter is made to fluctuate between 0.3 and 0.5 to ensure the improvement of the reaction completion;

[0127] During the experiment, the intensity of the chemical reaction was monitored to have reached 0.85Φ in 5 minutes. target,d Therefore, the wire feeding speed was dynamically adjusted starting from the sixth minute. The adjusted deep-layer wire feeding speed was 0.65 m / s to ensure that the target chemical reaction intensity was achieved.

[0128] This experiment statistically analyzed the chemical reaction effects under different parameter settings, set a series of standards and data, and designed a series of experiments based on the adjustment feedback to observe the ratio of chemical reaction efficiency to resource utilization. The final data showed that the adjusted deep wire feeding speed significantly improved resource utilization, reaching a utilization effect of 92%, thus verifying the innovativeness of this solution.

[0129] The following is a data record table related to the experiment, reflecting the comparison of various parameters and their effects;

[0130] In this embodiment, resource utilization generally refers to the percentage of input materials (e.g., cored wire) that are actually converted into target chemical products or complete the target reaction. Resource utilization reflects whether, after adjusting the wire feed speed, the cored wire material can be fully incorporated into the molten iron and effectively participate in the chemical reaction, thereby achieving the desired chemical product (e.g., alloy composition). Improvements in this metric can indicate improvements in the following areas:

[0131] More efficient material utilization and reduced waste;

[0132] More stable and efficient reaction process;

[0133] The material is delivered precisely to the target depth, triggering the ideal reaction state.

[0134] Table 1 Study on resource utilization of the first dynamic optimization control strategy:

[0135]

[0136] Through the above data recording and analysis, we can clearly see the innovativeness of the solution and the specific effects brought about by its optimization, successfully achieving the goal of improving resource utilization and chemical reaction efficiency.

[0137] Step S3: Implementing a second dynamic optimization control strategy on the wire feeding speed of the middle layer cored wire to obtain an adjusted wire feeding speed of the middle layer;

[0138] Further explanation: The second dynamic optimization control strategy includes:

[0139] Get the target depth of the middle layer

[0140] The middle depth of molten iron is the optimal depth for chemical reaction desulfurization, ensuring maximum material utilization and reaction control.

[0141] Set the initial wire feeding speed of the middle layer to In this embodiment, the middle layer Set it to 0.4m / s to get a stable release effect.

[0142] This speed takes into account the stability of the release of the cored wire material and the reaction effect, and can effectively reduce gas turbulence and reduce the emission of useless by-products.

[0143] The depth deviation of the middle layer is recorded as Δz m , the calculation formula is as follows:

[0144]

[0145] Δz m Used to evaluate the deviation of the real-time depth of the cored wire in the middle layer relative to the target depth of the middle layer, where z m Indicates real-time depth;

[0146] The desulfurization reaction rate of the middle layer is monitored by the reaction zone sensor; the target desulfurization rate of the middle layer is set to R target ; and the actual desulfurization rate of the middle layer is recorded as R m ;

[0147] The calculation formula for the by-product generation rate of the intermediate layer is defined as

[0148] Among them, dC gas Indicates the concentration of byproduct gas per unit time dt, dC gas The preceding d represents the index mark of the unit time dt; and the expected concentration value of the by-product gas concentration is set to C according to the process. target ;

[0149] A gas analyzer is used to detect the change in the concentration of by-product gas per unit time; this is used to determine the current completion status of the desulfurization reaction;

[0150] The adjustment formula is as follows:

[0151]

[0152] Among them, v′ m is the adjusted middle layer wire feeding speed;

[0153] α m is the weight coefficient for adjusting the depth of the intermediate layer, which is fine-tuned through real-time depth control. In this embodiment, α m The value is 0.2.

[0154] β m It is the weight coefficient used to adjust the desulfurization rate difference in the middle layer, which directly reflects the desulfurization efficiency. In this embodiment, β m The value is 0.4.

[0155] γ mis the weight coefficient used to adjust the by-product generation rate in the middle layer. In this embodiment, γ m The value 0.4 is used for early warning and intervention when gas concentration changes rapidly.

[0156] α m , β m and γ m are the adjustment weights of the corresponding parameters, and α m , β m and γ m The sum of is 1, α m , β m and γ m The values are all within the range of (0, 1);

[0157] If the by-product gas concentration dC is monitored in real time within the unit time dt gas >1.5C target , set 0.5≤γ m ≤0.7, γ m >α m >β m .

[0158] When dC gas ≤1.5C target When α m , β m and γ m The specific values are determined by the entropy weight method and the fuzzy analytic hierarchy process (FAHP) and will not be elaborated on here.

[0159] Step S4: implementing the third dynamic optimization control strategy on the surface cored wire feeding speed to obtain an adjusted surface wire feeding speed;

[0160] Further explanation: The third dynamic optimization control strategy includes:

[0161] The cored wire on the surface is mainly responsible for the initial cleaning and reaction start-up to ensure that the initial chemical reaction on the surface proceeds smoothly;

[0162] Set the initial wire feeding speed of the surface layer to Ensure the effective development of surface reactions;

[0163] The depth deviation of the surface is recorded as Δz s , the calculation formula is as follows:

[0164]

[0165] Among them, z s Indicates the real-time depth of the surface layer; the chemical reaction intensity of the surface layer is recorded as Φ s :

[0166] The target value of the chemical reaction intensity of the surface layer is recorded as Φ target,s ;

[0167] Arrange multiple measuring points around the surface core wire penetration area and calculate the average flow velocity V of these measuring points zone :

[0168]

[0169] Among them, v u is the flow velocity at the u-th measuring point, and U is the total number of measuring points;

[0170] The adjustment formula is as follows:

[0171]

[0172] Among them, v′ s is the adjusted surface wire feeding speed;

[0173] α s is the weight coefficient for adjusting the depth of the surface layer. In this embodiment, α s The value is 0.3.

[0174] β s is the weight coefficient for adjusting the chemical reaction intensity ratio of the surface layer. In this embodiment, β s The value is 0.5.

[0175] γ s is the weight coefficient for adjusting the average flow velocity of the surface layer. In this embodiment, γ s The value is 0.2.

[0176] α s , β s and γ s are the adjustment weights of the corresponding parameters, and α s , β s and γ s The sum of is 1, α s , β s and γ s The values are all in the range of (0, 1).

[0177] α s , β s and γ s The specific values are determined by the entropy weight method and the fuzzy analytic hierarchy process (FAHP) and will not be elaborated on here.

[0178] Step S5: respectively obtain the adjusted deep layer wire feeding speed, middle layer wire feeding speed and surface layer wire feeding speed for analysis, generate a sorted first proportion value, obtain the preset proportion value of the first proportion value, combine the linkage factor between different layers and the preset proportion value, correct the first proportion value, and finally form a second proportion value.

[0179] Further explanation: Define the first ratio value as v′ d :v′ m :v′ s ; Define the preset ratio value of the first ratio value as q1:q2:q3;

[0180] Determine the linkage factors between different layers as CF d,m , CF d,s and CF m,s ;

[0181] Combined with the preset ratio value and the corresponding linkage factor, the first ratio value is adjusted to obtain the following second ratio value:

[0182]

[0183] It should be noted that when CF d,m or CF d,s or CF m,s The larger the value, the higher the adjustment requirement for the feeding speed of the cored wire with the corresponding depth.

[0184] Set CF d,m , CF d,s and CF m,s The judgment thresholds are CF d,m,th , CF d,s,th and CF m,s,th ;

[0185] This embodiment CF d,m,th , CF d,s,th and CF m,s,th Based on the determined w D 、w Φ 、w V Based on the fuzzy analytic hierarchy process (FAHP), CF d,m,th , CF d,s,th and CF m,s,th The determining condition is The output value of each parameter in the standard value is below the standard value, and the feeding speed of the cored wire needs to be reduced;

[0186] When CF d,m +CF d,s ≤CF d,m,th +CF d,s,thWhen the second proportional value of the deep wire feeding speed is represented by

[0187] When CF d,m +CF d,s >CF d,m,th +CF d,s,th When the second proportional value of the deep wire feeding speed is represented by

[0188] When CF d,m +CF m,s ≤CF d,m,th +CF m,s,th When the second proportional value of the middle layer wire feeding speed is represented by

[0189] When CF d,m +CF m,s >CF d,m,th +CF m,s,th When the second proportional value of the middle layer wire feeding speed is represented by

[0190] When CF d,s +CF m,s ≤CF d,s,th +CF m,s,th When the second proportional value of the surface wire feeding speed is represented by

[0191] When CF d,s +CF m,s >CF d,s,th +CF m,s,th When the second proportional value of the surface wire feeding speed is represented by

[0192] It should be noted that:

[0193] When CF d,m +CF d,s >CF d,m,th +CF d,s,th or CF d,m +CF m,s >CF d,m,th +CF m,s,th or CF d,s +CF m,s >CF d,s,th +CF m,s,th When , it means that the interaction between linkage factors in the current layer is significant, there is a large speed deviation or mismatch risk, and the wire feeding speed needs to be increased;

[0194] By increasing the wire feeding speed, the deviation between layers can be quickly compensated, the adjustment time can be shortened, the responsiveness of the system can be enhanced, and the synchronous operation of each layer can be ensured, thus avoiding the waste of resources or low production efficiency caused by speed mismatch.

[0195] When CF d,m +CF d,s ≤CF d,m,th +CF d,s,th or CF d,m +CF m,s ≤CF d,m,th +CF m,s,th or CF d,s +CF m,s ≤CF d,s,th +CF m,s,th When the interaction between linkage factors at the current layer is weak, the system operation is relatively stable, and the wire feeding speed is well matched. When the system operation is stable and the wire feeding speed is well matched, appropriately reducing the wire feeding speed can help optimize resource utilization, reduce energy consumption, and improve the overall operating efficiency of the system. In addition, reducing excessively high wire feeding speeds can extend equipment life, reduce mechanical wear, and reduce maintenance costs.

[0196] Further explanation: This embodiment aims to solve the various problems caused by the lack of a detailed solution for layered control and adjustment of wire feeding speed in the prior art. Specifically, in the steelmaking process, the uneven distribution of deep resources often leads to the precipitation and ineffective consumption of bottom resources. The failure of the middle layer desulfurization process causes unsatisfactory decarbonization and desulfurization effects and affects the uniformity of sulfide deposition. The excessively slow wire feeding speed of the surface layer often leads to insignificant desulfurization effect or causes the spread of secondary pollution, ultimately resulting in low synergistic efficiency of each layer. To this end, this experiment divides the depth of the molten iron in the ladle into deep layer, middle layer and surface layer, and defines linkage factors. Based on this, a layered dynamic optimization control strategy is implemented to adjust the wire feeding speed of each layer to achieve fine layered control, thereby improving resource utilization, enhancing the efficiency of desulfurization and alloy addition, solving the problem of speed mismatch between each layer, ensuring the optimization and coordination of the overall system and operational efficiency, and reducing dependence on manual operation, improving the automation level of the production process, adapting to complex smelting environments, and achieving more accurate and stable production quality.

[0197] The test was conducted in the steelmaking workshop of a large steel manufacturer. A multi-layer cored wire system with deep, intermediate, and surface wire feeding equipment was selected as the test object. Before the test, the system was fully calibrated and checked to ensure that each wire feeding device was in optimal operating condition. Initially, the wire feeding speed of each layer was set to the deep layer wire feeding speed v′. d =120m / min, middle layer wire feeding speed v' m =90m / min and surface wire feeding speed v s′=70m / min. The preset ratio value is set to q1:q2:q3=1.5:1.0:0.8.

[0198] Then, the linkage factor between different layers is calculated according to the following formula:

[0199]

[0200] Based on the above parameters, the linkage factor CF is calculated d,m =0.55, CF d,s =0.45 and CF m,s =0.35. Set the judgment threshold to CF d,m,th =0.6, CF d,s,th =0.5 and CF m,s,th =0.4. Since all linkage factors are below their respective judgment thresholds, the system needs to adjust the wire feeding speed of the cored wire to optimize resource distribution and desulfurization effect.

[0201] During the test, the initial wire feeding speed and linkage factor are first recorded.

[0202] According to step S5, the adjusted deep layer, middle layer and surface layer wire feeding speeds are obtained, and the sorted first proportional value v' is generated. d :v′ m :v′ s =120:90:70;

[0203] In combination with the preset ratio value q1:q2:q3=1.5:1.0:0.8 and the linkage factor, the correction formula is applied to adjust the first ratio value to obtain the second ratio value.

[0204] Deep wire feeding speed adjustment:

[0205]

[0206] Since CF d,m +CF d,s =1.0≤CF d,m,th +CF d,s,th =1.1, applying the reduction strategy, the adjusted deep wire feeding speed is v′ d =119.51m / min.

[0207] Middle layer wire feeding speed adjustment:

[0208]

[0209] Since CF d,m +CF m,s =0.55+0.35=0.90≤CF d,m,th +CF m,s,th=1.0, the reduction strategy is applied, and the adjusted middle layer wire feeding speed is v′ m =89.33m / min.

[0210] Surface wire feeding speed adjustment:

[0211]

[0212] Since CF d,s +CF m,s =0.45+0.35=0.80≤CF d,s,th +CF m,s,th =0.9, applying the reduction strategy, the adjusted surface wire feeding speed is v s ′=69.26m / min.

[0213] After the adjustment, the system was restarted and continuously monitored the wire feeding speed, resource utilization, desulfurization efficiency and overall operating efficiency of each layer; the test results showed that the wire feeding speed adjusted through the layered dynamic optimization control strategy significantly improved the coordination between the layers, improved resource utilization and the efficiency of desulfurization and alloy addition, while reducing manual operations, improving the automation level of the production process, adapting to complex smelting environments, and achieving more accurate and stable production quality.

[0214] Table 2 Test data records:

[0215]

[0216]

[0217] The table data is described as follows:

[0218] Initial wire feeding speed: The standard wire feeding speed of each layer before the test begins.

[0219] Preset ratio value: the reference ratio of wire feeding speed of each layer determined according to system design.

[0220] Judgment threshold: The linkage factor threshold used to determine whether the wire feeding speed needs to be adjusted.

[0221] Proportional value before adjustment: The proportional value calculated based on the initial wire feeding speed and linkage factor.

[0222] Adjusted Scale Value: The adjusted result after applying the correction formula.

[0223] Resource utilization (%): 75% before optimization, increased to 85% after adjustment, an increase of 13.3%.

[0224] Desulfurization efficiency (%): 65% before optimization, increased to 80% after adjustment, an increase of 23.1%.

[0225] Alloy addition efficiency (%): 60% before optimization, increased to 75% after adjustment, an increase of 25%.

[0226] Improvement in system operation efficiency (%): The overall system operation efficiency has increased by 15%.

[0227] Improved automation level (%): Through dynamic adjustment strategies, the automation level of the production process has increased by 20%.

[0228] Through the above experiments, the data show that the present invention significantly improves the problems of deep resource precipitation, failure of the middle layer desulfurization process and secondary pollution of the surface layer existing in the prior art by adjusting the wire feeding speed through the layered dynamic optimization control strategy.

[0229] Step S6: Receive the second proportional value, and according to the deep layer wire feeding speed, middle layer wire feeding speed and surface layer wire feeding speed corresponding to the second proportional value, respectively execute the corresponding wire feeding speed for the cored wire in the deep layer, middle layer and surface layer. The specific implementation steps are as follows:

[0230] ensuring that the second proportional value is accurately transmitted to the control system through a data interface or a control module;

[0231] Using a data parsing module, the second ratio value is split according to a predetermined format to determine the target wire feeding speed of each layer;

[0232] Deep cored wire: According to Send adjustment instructions to the deep wire feeding device to set the actual feeding speed of the deep cored wire.

[0233] Intermediate layer cored wire: According to Send adjustment instructions to the middle layer wire feeding device to set the actual wire feeding speed of the middle layer cored wire;

[0234] Surface cored wire: According to Send adjustment instructions to the surface wire feeding device to set the actual wire feeding speed of the surface cored wire.

[0235] Specifically, the target speed is transmitted to the wire feeding equipment on each layer through PLC control signals to ensure accurate execution.

[0236] The control system obtains the actual wire feeding speed of each layer of cored wire in real time through sensors or monitoring devices.

[0237] Compare the actual wire feeding speed with the target wire feeding speed to detect whether there is any deviation.

[0238] The above content uses speed sensors, PLC feedback modules or SCADA systems to achieve real-time monitoring and data collection of wire feeding speed.

[0239] If a deviation is detected between the actual wire feeding speed and the target speed, the control system will automatically make fine adjustments and resend the adjustment instructions to ensure that the wire feeding speed of each layer accurately matches the second proportional value.

[0240] Optimize and adjust strategies based on real-time data trends to improve system response speed and control accuracy.

[0241] Example 2:

[0242] See also Figure 2 A cored wire feeding speed precision control system, the system is used to implement the cored wire feeding speed precision control method, comprising:

[0243] Linkage factor generation module: used to divide the current molten iron depth in the ladle into deep layer, middle layer and surface layer, and initially define the linkage factors between different layers in the deep layer, middle layer and surface layer;

[0244] A first dynamic optimization control strategy generating module: used for implementing a first dynamic optimization control strategy on the feeding speed of the deep cored wire to obtain an adjusted deep wire feeding speed;

[0245] A second dynamic optimization control strategy generating module is used to implement a second dynamic optimization control strategy on the wire feeding speed of the middle layer cored wire to obtain an adjusted wire feeding speed of the middle layer;

[0246] A third dynamic optimization control strategy generating module: used for implementing the third dynamic optimization control strategy on the wire feeding speed of the surface cored wire to obtain an adjusted surface wire feeding speed;

[0247] Correction module: used to obtain the adjusted deep layer wire feeding speed, middle layer wire feeding speed and surface layer wire feeding speed respectively for analysis, generate a sorted first proportional value, obtain a preset proportional value of the first proportional value, combine the linkage factor between different layers and the preset proportional value, correct the first proportional value, and finally form a second proportional value;

[0248] Execution module: used for receiving the second proportional value, and executing corresponding wire feeding speeds for the deep layer, middle layer and surface layer cored wires respectively according to the deep layer wire feeding speed, middle layer wire feeding speed and surface layer wire feeding speed corresponding to the second proportional value.

[0249] It should be noted that: All calculation formulas in this application document use regression analysis including but not limited to machine learning algorithms to deeply analyze the relevant parameters collected and identify their natural trends and relationships. Use professional software, such as Python's Scikit-learn library or R language, to automatically generate mathematical models that match the data. Then, objectively evaluate the performance of the model through methods such as cross-validation, and combine continuous feedback and optimization to ensure that the created formula truly reflects the inherent laws of the data, thereby ensuring its effectiveness and accuracy. In all calculation formulas in this application, the parameters in each formula are dimensionally non-dimensionalized within a consistent range to ensure that different physical quantities are compared on the same scale; dimensionless technical means include but are not limited to Min-Max Normalization and Z-Score standardization;

[0250] The technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. The computer software product can be stored in a computer-readable storage medium, such as a computer floppy disk, read-only memory (ROM), random access memory (RAM), flash memory (FLASH), hard disk or optical disk, etc., and includes a number of instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) to execute the methods of various embodiments of the present invention.

[0251] The logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as an ordered list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (e.g., a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device). For purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transport a program for use by, or in conjunction with, an instruction execution system, apparatus, or device.

[0252] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

[0253] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A precise control method for the feeding speed of cored wires is applied to the feeding speed control of three cored wire feeding systems to complete stratified reactions at multiple depths and multiple areas. The method is characterized by: The specific steps include: Step S1: Divide the current molten iron depth in the ladle into a deep layer, an intermediate layer, and a surface layer, and initially define linkage factors between different layers in the deep layer, the intermediate layer, and the surface layer; Step S2: implementing a first dynamic optimization control strategy on the feeding speed of the deep cored wire to obtain an adjusted deep wire feeding speed; Step S3: Implementing a second dynamic optimization control strategy on the wire feeding speed of the middle layer cored wire to obtain an adjusted wire feeding speed of the middle layer; Step S4: implementing the third dynamic optimization control strategy on the surface cored wire feeding speed to obtain an adjusted surface wire feeding speed; Step S5: respectively obtaining the adjusted deep layer wire feeding speed, middle layer wire feeding speed, and surface layer wire feeding speed for analysis, generating a sorted first proportional value, obtaining a preset proportional value for the first proportional value, combining the linkage factor between different layers and the preset proportional value, correcting the first proportional value, and finally forming a second proportional value; Step S6: receiving the second proportional value, and executing corresponding wire feeding speeds for the deep layer, middle layer and surface layer cored wires respectively according to the deep layer wire feeding speed, middle layer wire feeding speed and surface layer wire feeding speed corresponding to the second proportional value.

2. The method for accurately controlling the feeding speed of the cored wire according to claim 1, characterized in that: The current molten iron depth in the ladle is recorded as H iron Based on H iron The ladle depth is divided into the following regional layers: Deep target depth: z1 d =1.5H iron , z2 d =1.6H iron ; Middle layer target depth: Surface target depth: Among them, z1 d , z2 d , and They represent the target depth of the deep initial stage, the target depth of the deep arrival stage, the target depth of the intermediate layer, and the target depth of the surface layer, respectively; where d, m, and s represent the index marks of the deep layer, intermediate layer, and surface layer, respectively; The calculation formula of the initial defined linkage factor is as follows: Among them, CF ij is the linkage factor, and the indices i and j represent the combined indices between different layers in the deep layer, the middle layer, and the surface layer; and both i and j are in {d, m, s}, i≠j; z i and z j are the actual depths of the two cored wires in the i-th and j-th layers respectively; |z i -z j | represents the actual depth difference between layer i and layer j; |z i -z j The smaller the value, the greater the interference between different layers. The more serious the mutual interference of chemical reactions between multiple cored wires in different layers. Strategic adjustments to the cored wires include changing the cored wire sequence, redesigning the chemical composition of the cored wires, or changing the depth configuration of the cored wires. The smaller the value, the less need there is to adjust the cored wire feed speed. |z i -z j The larger the value, the smaller the interference between different layers, and the lower the coordination efficiency of multiple cored wires between different layers. In order to improve the coordination efficiency, the demand for adjusting the cored wire feeding speed is higher; Φ ij is the ratio of chemical reaction intensity between layer i and layer j; (1-Φ ij ) 2 It represents the matching degree of chemical reaction intensity between layer i and layer j; Φ ij The greater the deviation from 1, the more inconsistent the wire feeding speed or release effect of the i-th layer and the j-th layer is, and the greater the adjustment of the wire feeding speed of the cored wire is; If Φ ij The closer it is to 1, the better the dynamic coordination between the i-th layer and the j-th layer is, and the smaller the adjustment range of the cored wire feeding speed is; V ij is the wire feeding speed v of the i-th layer i and the j-th layer wire feeding speed v j The ratio between If 1-V ij The closer it is to 1, the greater the mismatch between the wire feeding speeds of the i-th layer and the j-th layer; the greater the adjustment of the wire feeding speed of the cored wire needs to be; w D 、w Φ 、w V are the weight coefficients of each parameter, which are used to adjust the contribution of the actual depth difference value, chemical reaction intensity and wire feeding speed ratio to the linkage factor; w D 、w Φ 、w V The value range is in the interval (0,1); and w D +w Φ +w V =1; CF i,j The larger the value, the higher the need for adjusting the cored wire feeding speed; CF i,j This includes combinations between the following different layers: Combination 1: The relationship between the deep layer and the middle layer, the linkage factor is represented by CF d,m ; Combination 2: The relationship between the deep layer and the surface layer, the linkage factor is represented by CF d,s ; Combination 3: The relationship between the middle layer and the surface layer, the linkage factor is represented by CF m,s .

3. The method for accurately controlling the feeding speed of the cored wire according to claim 2, characterized in that: The first dynamic optimization control strategy includes: Set the wire feeding speed in the initial stage of the deep layer to The wire feeding speed at the deep arrival stage is And set And the initial wire feeding speed of the deep layer is set comprehensively as like The closer the value is to 0, the and The higher the degree of deviation between them, the faster the cored wire penetrates into the deep layer; like The closer the value is to 1, the and The smaller the deviation between them, the more stable the overall wire feeding speed; Calculate the depth bias adjustment term α of the deep layer d d ·(Δz d ), and Δz d =z2 d -z1 d ; Introducing the linkage factor CF between the deep layer d and the middle layer m d,m ; and the linkage factor CF between the deep layer d and the surface layer s d,s ; and calculate the current chemical reaction intensity Φ in the deep layer d d , and obtain the target value of chemical reaction intensity Φ target,d ; Calculate the chemical reaction intensity adjustment term β at depth d d ·(Φ d -Φ target,d ); Obtain the time t when the core wire material in the deep layer d is completely integrated into the molten iron melt,d , to determine the melting time adjustment term γ for the deep layer d d ·(1 / t melt,d ); α d , β d and γ d are the adjustment weights of the corresponding parameters; Combined with the above α d ·(Δz d ), β d ·(Φ d -Φ target,d ),γ d ·(1 / t melt,d ), CF d,m and CF d,s Conduct comprehensive analysis and adjust the initial wire feeding speed in the deep layer in real time through the dynamic fraction formula To obtain the adjusted deep wire feeding speed v′ d , and perform data analysis and simulation verification in MATLAB, Python or Simulink; The initial stage of deep layer needs fast wire feeding speed, which is beneficial to β d The adjustment range is small; The deep arrival stage requires enhanced reaction control, d The adjustment range is large; If Φ d <0.9Φ target,d , indicating that the chemical reaction intensity is insufficient and β needs to be increased d , so that 0.5 ≥ β d ≥0.3, β d >α d >γ d ; Set t melt,d The ideal value of t melt,d Higher than the ideal value, set γ d ≤0.4, to reduce the initial wire feeding speed in deep layers.

4. The method for accurately controlling the feeding speed of the cored wire according to claim 3, characterized in that: The second dynamic optimization control strategy includes: Get the target depth of the middle layer Set the initial wire feeding speed of the middle layer to The depth deviation of the middle layer is recorded as Δz m , the calculation formula is as follows: Δz m Used to evaluate the real-time depth z of the cored wire in the middle layer m Relative to the depth of the middle layer target Deviation; Set the target desulfurization rate of the middle layer to R target ; and the actual desulfurization rate of the middle layer is recorded as R m ; The calculation formula for the by-product generation rate of the intermediate layer is defined as Among them, dC gas Indicates the concentration of by-product gas per unit time dt, and sets the expected concentration value of by-product gas concentration to C target ; Combined above Δz m 、R m 、R target 、 CF d,m and CF m,s After comprehensive analysis, the initial wire feeding speed of the middle layer is adjusted in real time through the dynamic fraction formula. To obtain the adjusted middle layer feeding speed v' m , and perform data analysis and simulation verification in MATLAB, Python or Simulink.

5. The method for accurately controlling the feeding speed of the cored wire according to claim 4, characterized in that: The third dynamic optimization control strategy includes: Set the initial wire feeding speed of the surface layer to The depth deviation of the surface is recorded as Δz s , the calculation formula is as follows: Among them, z s Indicates the real-time depth of the surface layer; the chemical reaction intensity of the surface layer is recorded as Φ s : The target value of the chemical reaction intensity of the surface layer is recorded as Φ target,s ; Arrange multiple measuring points around the surface core wire penetration area and calculate the average flow velocity V of these measuring points zone : Among them, v u is the flow velocity at the u-th measuring point, and U is the total number of measuring points; Combined above Δz s , Φ s , Φ target ,s、V zone , CF d,s and CF m,s After comprehensive analysis, the initial wire feeding speed of the surface layer is adjusted in real time through the dynamic fraction formula. To obtain the adjusted surface wire feeding speed v' s , and perform data analysis and simulation verification in MATLAB, Python or Simulink.

6. The method for accurately controlling the feeding speed of the cored wire according to claim 5, characterized in that: Define the first scale value as v′ d :v′ m :v′ s ; Define the preset ratio value of the first ratio value as q1:q2:q3; Determine the linkage factors between different layers as CF d,m , CF d,s and CF m,s ; Combined with the preset ratio value and the corresponding linkage factor, the first ratio value is adjusted to obtain the following second ratio value: When CF d,m or CF d,s or CF m,s The larger the value, the higher the adjustment requirement for the feeding speed of the cored wire with the corresponding depth. Set CF d,m , CF d,s and CF m,s The judgment thresholds are CF d,m,th , CF d,s,th and CF m,s,th ; When CF d,m +CF d,s >CF d,m,th +CF d,s,th or CF d,m +CF m,s >CF d,m,th +CF m,s,th or CF d,s +CF m,s >CF d,s,th +CF m,s,th When , it means that the interaction between the linkage factors in the current layers is strong, and there is a risk of speed deviation or mismatch. It is necessary to increase the wire feeding speed to quickly compensate for the deviation between the layers and shorten the adjustment time; When CF d,m +CF d,s ≤CF d,m,th +CF d,s,th or CF d,m +CF m,s ≤CF d,m,th +CF m,s,th or CF d,s +CF m,s ≤CF d,s,th +CF m,s,th When , the interaction between linkage factors in the current layer is weak. When the wire feeding speed is well matched, the wire feeding speed is reduced to optimize resource utilization and reduce energy consumption.

7. A precise control system for the feeding speed of a cored wire, characterized by: The system is used to implement the method for accurately controlling the feeding speed of the cored wire according to any one of claims 1 to 6, comprising: Linkage factor generation module: used to divide the current molten iron depth in the ladle into deep layer, middle layer and surface layer, and initially define the linkage factors between different layers in the deep layer, middle layer and surface layer; A first dynamic optimization control strategy generating module: used for implementing a first dynamic optimization control strategy on the feeding speed of the deep cored wire to obtain an adjusted deep wire feeding speed; A second dynamic optimization control strategy generating module is used to implement a second dynamic optimization control strategy on the wire feeding speed of the middle layer cored wire to obtain an adjusted wire feeding speed of the middle layer; A third dynamic optimization control strategy generating module: used for implementing the third dynamic optimization control strategy on the wire feeding speed of the surface cored wire to obtain an adjusted surface wire feeding speed; Correction module: used to obtain the adjusted deep layer wire feeding speed, middle layer wire feeding speed and surface layer wire feeding speed respectively for analysis, generate a sorted first proportional value, obtain a preset proportional value of the first proportional value, combine the linkage factor between different layers and the preset proportional value, correct the first proportional value, and finally form a second proportional value; Execution module: used for receiving the second proportional value, and executing corresponding wire feeding speeds for the deep layer, middle layer and surface layer cored wires respectively according to the deep layer wire feeding speed, middle layer wire feeding speed and surface layer wire feeding speed corresponding to the second proportional value.

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