A top-blown furnace feed control system and method

Abstract

The present application relates to top-blown bath smelting technical field, provide a kind of top-blown furnace feed control system and method, the feed control system includes mixing material injection device, top-blown furnace, lance and control unit, considering the influence of the factors such as the injection pressure of material, the depth of lance immersion, the actual condition of smelting pool to the injection pressure of material delivered into the lance of top-blown furnace, by real-time monitoring to the injection pressure of entering lance, and by adjusting material delivery pressure to compensate injection pressure, to ensure the continuous delivery of material, but at the same time, the process of pressure compensation will affect the pre-set feed rate, so it is necessary to properly adjust the flow of material, i.e. the adjustment of injection pressure will affect the flow of material, and the preset flow can be achieved by properly adjusting the flow of material, to balance the pressure and flow rate, so as to provide stable and uniform material delivery, improve smelting efficiency under the condition of meeting the requirements of metal smelting reaction.

Description

Technical Field

[0001] This invention relates to the field of metal smelting technology, and in particular to a feeding control system and method for a top-blown furnace. Background Technology

[0002] Top-blown smelting technology (represented by the Osmelt furnace and Isa furnace) is one of the core processes in modern non-ferrous metal smelting, and is widely applicable to the extraction of metals such as copper, tin, lead, and zinc. Its traditional feeding method generally uses a belt conveyor to add a mixture of materials (including concentrate, flux, and return material) with a water content of approximately 8-15% from the top of the furnace.

[0003] The existing materials are mainly sprayed into the furnace body through lances inside the top-blown furnace, which helps to improve the uniformity of material dispersion and the efficiency of the smelting reaction. However, due to the complex conditions inside the furnace (high temperature and high pressure), it is necessary to adjust the spraying parameters of the lances in a timely manner according to the reaction conditions in the smelting pool. However, operators have found that adjusting only the spraying parameters of the lances is not effective enough to meet the high requirements of the smelting reaction, thus affecting the metal smelting efficiency. Summary of the Invention

[0004] The purpose of this invention is to provide a feeding control system and method for a top-blown furnace, so as to solve the technical problem that the existing top-blown molten pool smelting reaction system cannot achieve a better smelting reaction effect by simply adjusting the spray gun parameters.

[0005] In a first aspect, the present invention provides a feeding control system for a top-blown furnace, comprising: A mixing and blowing device includes a blowing cylinder, a mixing mechanism is provided at the top of the blowing cylinder, and a material blowing and conveying mechanism is provided at the bottom of the blowing cylinder for pressurizing and conveying the mixed material outward. A top-blown furnace is provided, wherein a spray gun is provided inside the top-blown furnace, and the spray gun is connected to the material spraying and conveying mechanism through a material pipeline; a spray pressure detection component is provided near the spray gun in the material pipeline, and the spray pressure detection component is used to detect the material pressure before entering the spray gun; the spray gun is provided with a flow control component for controlling the material flow rate; The pressure replenishing device includes a pressure replenishing pump and a pressure replenishing pipeline. The pressure replenishing pipeline is arranged in parallel along the material pipeline. The pressure replenishing pipeline is connected to different positions of the material pipeline through pressure replenishing branch pipes. The pressure of the pressure replenishing branch pipes is controlled by a pressure distributor. The control unit is electrically connected to the injection pressure detection component, the flow control component, the pressure distributor, and the material injection and conveying mechanism, respectively. It is used to adjust the outlet pressure of the material injection and conveying mechanism, the pressure of the pressure distributor, and the material flow rate according to the material pressure obtained by the injection pressure detection component, so that the injection pressure and flow rate of the material are controlled within a preset range.

[0006] Optionally, the control unit is used to adjust the outlet pressure of the material injection and conveying mechanism, the pressure of the pressure distributor, and the material flow rate based on the material pressure obtained by the injection pressure detection component, so that the injection pressure and flow rate of the material are controlled within a preset range, specifically including: When the material pressure is detected to be less than the lower limit of the pressure threshold range, the outlet pressure of the material blowing and conveying mechanism and / or the pressure of the pressure distributor are increased, and the flow rate of the material is reduced. Alternatively, when the material pressure is detected to be greater than the upper limit of the pressure threshold range, the outlet pressure of the material blowing and conveying mechanism and / or the pressure of the pressure distributor are reduced, and the flow rate of the material is increased.

[0007] Optionally, the feeding control system of the top-blown furnace further includes: a carrier gas conveying pipeline, the spray gun being connected to the carrier gas conveying pipeline; the material pressure obtained by the spray pressure detection component is the first spray pressure, the spray pressure of the carrier gas conveying pipeline is the second spray pressure, the depth of the nozzle of the spray gun in the melting pool inside the top-blown furnace is the immersion depth, and the spray pressure of the spray gun is determined by the first spray pressure, the second spray pressure, and the immersion depth; When the injection pressure is detected to be less than the lower limit of the pressure threshold range, the first injection pressure and the second injection pressure are increased, or the immersion depth is decreased; or, when the injection pressure is detected to be greater than the upper limit of the pressure threshold range, the first injection pressure and the second injection pressure are decreased, or the immersion depth is increased.

[0008] Optionally, along the direction of the material pipeline, the pressure of the pressure distributor gradually decreases from the end near the mixing spray device to the end away from the mixing spray device.

[0009] Optionally, the pressure of the pressure distributor is less than the outlet pressure of the material blowing and conveying mechanism.

[0010] Optionally, the pressure-replenishing pipeline may be connected by an arc-shaped pipeline at the location where the pipeline direction changes.

[0011] Optionally, the top of the spray gun is provided with a position detection sensor, an angle detection sensor, and a liquid level detection sensor. The position detection sensor is used to obtain the insertion position of the spray gun, the angle detection sensor is used to obtain the tilt angle of the spray gun, and the liquid level detection sensor is used to obtain the immersion depth of the spray gun. The control unit is used to adjust the installation position of the spray gun according to the insertion position, angle, and immersion depth of the spray gun.

[0012] Optionally, the mixing and blowing device further includes a material drying component; the material drying component includes a drying element and a moisture content detection element, the moisture content detection element being used to detect the moisture content in the material.

[0013] Secondly, the present invention also provides a feeding control method for a top-blown furnace, based on the feeding control system described in the first aspect, the feeding control method comprising: Obtain the material pressure acquired by the injection pressure detection component; Based on the material pressure obtained by the injection pressure detection component, the outlet pressure of the material injection and conveying mechanism, the pressure of the pressure distributor, and the material flow rate are adjusted so that the injection pressure and flow rate of the material are controlled within a preset range.

[0014] Optionally, based on the material pressure obtained by the injection pressure detection component, the outlet pressure of the material injection conveying mechanism, the pressure of the pressure distributor, and the material flow rate are adjusted to control the injection pressure and flow rate of the material within a preset range, including: When the material pressure is detected to be less than the lower limit of the pressure threshold range, the outlet pressure of the material blowing and conveying mechanism and / or the pressure of the pressure distributor are increased, and the flow rate of the material is reduced. Alternatively, when the material pressure is detected to be greater than the upper limit of the pressure threshold range, the outlet pressure of the material blowing and conveying mechanism and / or the pressure of the pressure distributor are reduced, and the flow rate of the material is increased.

[0015] Optionally, the flow field, temperature field, and concentration field within the top-blown furnace can be adjusted according to the insertion position, angle, and immersion depth of the spray gun. The installation scheme of the spray gun can be optimized through numerical simulation to ensure compatibility with the top-blown furnace and avoid localized over-erosion and stress concentration. Understandably, the specific method for optimizing the spray gun through numerical simulation is not specifically limited here. For example, a matching installation position for the spray gun can be obtained by combining the relevant dimensions of the top-blown furnace with the aforementioned parameters such as the insertion position, angle, and immersion depth of the spray gun, using known CFD numerical simulation methods.

[0016] Optionally, the feeding control method further includes: The core parameters affecting the purging effect are determined, including the flow rate and pressure of the carrier gas, the powder conveying rate, the immersion depth of the spray gun, the furnace pressure, and the melt temperature and composition. Using data generated by numerical simulation (no specific limitations are made here, and many known modeling tools can be used to simulate and obtain relevant data) and industrial test data, as well as historical operation data, a correlation model with injection stability and smelting efficiency as optimization objectives is constructed (a model with self-learning improvement can also be constructed; existing methods can be used for specific model building, and no specific limitations are made here). For example, model-based predictive control or reinforcement learning algorithms can be developed to dynamically optimize the spray gun immersion depth and airflow ratio parameters in real time, intelligently suppressing periodic pressure pulses and difficulties in particulate material penetration, achieving adaptive and stable operation of the spraying process, and preventing spray gun clogging. Specific models and algorithms are not the core protection focus of this application and will not be presented here. It is understood that establishing the aforementioned models is beneficial for obtaining better process operating parameters, but it is not the only way to obtain relevant process parameters; feasible relevant process parameters can still be obtained through historical data, experimental data, etc.

[0017] This invention has at least the following technical effects: The feeding control system for the top-blown furnace provided by this invention takes into account the influence of factors such as the injection pressure of the material, the immersion depth of the spray gun, and the actual conditions of the smelting pool on the injection pressure of the material delivered to the top-blown furnace. The actual injection pressure may deviate from the set injection pressure. Therefore, the injection pressure entering the spray gun is monitored in real time, and the injection pressure is compensated by adjusting the material conveying pressure to ensure continuous material delivery. However, since the pressure compensation process will affect the preset feeding speed, the material flow rate needs to be appropriately adjusted. That is, the adjustment of the injection pressure will affect the material flow, and the material flow rate needs to be appropriately adjusted to reach the preset flow rate to balance the pressure and flow rate, thereby providing stable and uniform material delivery. This improves smelting efficiency while meeting the requirements of the metal smelting reaction. Attached Figure Description

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A schematic diagram of the overall structure of a top-blown furnace feeding control system provided in an embodiment of the present invention; Figure 2A schematic diagram of the module connection of the control unit of a top-blown furnace feeding control system provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of the spray gun provided in an embodiment of the present invention; Figure 4 A flowchart illustrating a feeding control method for a top-blown furnace provided in an embodiment of the present invention. Detailed Implementation

[0020] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] It will be understood by those skilled in the art that, unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as in the context of the prior art, and should not be interpreted in an idealized or overly formal sense unless specifically defined as herein.

[0022] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this specification means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. The term “and / or” as used herein includes all or any unit and all combinations of one or more associated listed items. It is understood that specific components such as those for detecting pressure are not specifically limited herein, and known or commercially available components that achieve the relevant functions can be used. This lack of specific limitation on specific components does not render the control system of this application unfeasible.

[0023] Combination Figure 1 and Figure 2 As shown, an embodiment of the present invention provides a feeding control system for a top-blown furnace, including: a mixing and blowing device 1, a top-blown furnace 9, a pressure replenishing device, and a control unit 12.

[0024] Specifically, the mixing and blowing device 1 includes a blowing cylinder, the top of which is provided with a mixing mechanism. The blowing cylinder is used to mix the incoming materials to obtain a specific proportion of materials. The bottom of the blowing cylinder is provided with a material blowing and conveying mechanism 2, which is used to pressurize and convey the mixed materials outward.

[0025] A spray gun 10 is located near the top of the top-blown furnace 9. The spray gun 10 is connected to the material conveying mechanism via a material pipe 4 and is used to spray oxidant and materials into the smelting pool 11 inside the top-blown furnace 9. A spray pressure detection component 8 is located near the spray gun 10 in the material pipe 4. The spray pressure detection component 8 is used to detect the material pressure before it enters the spray gun 10. The spray gun 10 is equipped with a flow control component 3 for controlling the material flow rate.

[0026] The pressure replenishing device includes a pressure replenishing pump and a pressure replenishing pipeline 6. The pressure replenishing pipeline 6 is arranged in parallel along the material pipeline 4. The pressure replenishing pump supplies air into the pressure replenishing pipeline 6 to replenish the pressure. The pressure replenishing pipeline 6 is connected to different positions of the material pipeline 4 through pressure replenishing branch pipes 7. The pressure of the pressure replenishing branch pipes 7 is controlled by a pressure distributor 5.

[0027] Preferably, the pressurization gas source is preheated nitrogen or process air, for example, at a temperature of 100~200°C, to prevent material condensation. Condensation in the pressure-replenishing branch pipe and material pipeline can cause powder to stick to the wall, bridge, or even blockage. Turbulent pulsations can also occur at the confluence of the low-temperature pressure-replenishing gas and the main conveying airflow due to temperature and density differences, leading to distorted pressure injection detection. If the pressure-replenishing gas is not preheated, the local temperature of the pipe wall may be low, increasing the likelihood of residual moisture condensing on the pipe wall and adsorbing powder, thus increasing the possibility of material plugging. Preheating the pressure-replenishing gas to 100-200℃ can raise the pipe wall temperature, fundamentally preventing condensation and sticking. Simultaneously, preheating increases the gas's dynamic viscosity (kinematic viscosity, the opposite of liquid) and reduces its density, facilitating matching with the main conveying airflow (especially near the molten pool where the main conveying airflow is affected by heat, the preheating gas's effect on airflow stability is more pronounced). This reduces the intensity of turbulent pulsations at the confluence of the two airflows in the pressure-replenishing branch pipe, preventing false pulsation signals from the pressure injection detection component. This allows the control unit's pressure-flow linkage adjustment to more accurately respond to changes in the molten pool back pressure, improving control accuracy.

[0028] The control unit 12 is electrically connected to the injection pressure detection component 8, the flow control component 3, the pressure distributor 5, and the material injection and conveying mechanism 2, respectively, and is used to adjust the outlet pressure of the material injection and conveying mechanism 2, the pressure of the pressure distributor 5, and the material flow rate according to the material pressure obtained by the injection pressure detection component 8, so that the injection pressure and flow rate of the material are controlled within a preset range.

[0029] It should be noted that the outlet pressure of the material blowing and conveying mechanism 2 can be controlled by the inlet pressure of the conveying gas, specifically by a pressure regulating valve. Increasing the inlet pressure of the conveying gas will increase the outlet pressure of the material blowing and conveying mechanism 2.

[0030] Compared to existing methods that only control the outlet pressure of the spray gun, which cannot achieve a balanced adjustment of the pressure and material feeding speed in the spray gun, resulting in unstable and uneven material conveying and affecting the metal smelting reaction, the top-blown furnace feeding control system provided in this embodiment takes into account the influence of factors such as the material spraying pressure, the immersion depth of the spray gun 10, and the actual conditions of the smelting pool 11 on the spraying pressure of the material entering the top-blown furnace 9. The actual spraying pressure may deviate from the set spraying pressure. Therefore, the spraying pressure entering the spray gun 10 is monitored in real time, and the spraying pressure is compensated by adjusting the material conveying pressure to ensure continuous material conveying. However, since the pressure compensation process will affect the preset feeding speed, the material flow rate needs to be appropriately adjusted. That is, the adjustment of the spraying pressure will affect the material flow, and the material flow rate needs to be appropriately adjusted to reach the preset flow rate. At the same time, the material pipeline 4 is pressurized by the pressure replenishing device to balance the pressure and flow rate and ensure the stability of the material conveying pressure, thereby providing stable and uniform material conveying. This improves the smelting efficiency while meeting the requirements of the metal smelting reaction.

[0031] In some embodiments, the control unit 12 is used to adjust the outlet pressure of the material jetting and conveying mechanism 2, the pressure of the pressure distributor 5, and the material flow rate based on the material pressure obtained by the jetting pressure detection component 8, so that the jetting pressure and flow rate of the material are controlled within a preset range, specifically including: When the material pressure is detected to be less than the lower limit of the pressure threshold range, the outlet pressure of the material blowing and conveying mechanism 2 and / or the pressure of the pressure distributor 5 are increased, and the flow rate of the material is reduced.

[0032] When the material pressure is detected to be greater than the upper limit of the pressure threshold range, the outlet pressure of the material blowing and conveying mechanism 2 and / or the pressure of the pressure distributor 5 are reduced, and the flow rate of the material is increased.

[0033] When the pipeline pressure is below the threshold, the material carrying capacity decreases at the same volumetric flow rate. Increasing the pressure can restore the gas flow energy, but maintaining the original material flow rate may lead to excessive gas-solid ratios and adverse effects such as deposition and blockage. Simultaneous or partial pressure replenishment at different locations (preferably through the coordinated control of the outlet pressure of the material injection and conveying mechanism 2 and the pressure of the pressure distributor 5) and synchronously reducing the material flow rate helps to counteract the gas volume expansion effect caused by the increased pressure, making the solid mass flow rate per unit time more compatible with the heat load of the molten pool reaction. Conversely, when the pressure is too high, the gas density is high and the flow rate is too fast. Reducing the pressure and increasing the material flow rate can prevent excessive scouring of the spray gun and molten pool by the high-speed airflow, thus stabilizing the total material supply. Through the above adjustments, pressure and flow rate are balanced, thereby providing stable and uniform material conveying and improving smelting efficiency while meeting the requirements of the metal smelting reaction.

[0034] It should be noted that the outlet pressure of the material blowing and conveying mechanism 2 and the pressure of the pressure distributor 5 can be adjusted by the control unit 12. For example, the pressure can be synchronously adjusted (increased or decreased) according to a fixed set linkage ratio of 1:1, that is, the pressure of the two can be increased or decreased according to the same change ratio (for example, each increases by 10Pa). This can avoid the problem of uneven material conveying (delay or blockage) caused by sudden changes in the conveying pressure of the material blowing and conveying mechanism 2, and ensure stable material conveying.

[0035] In some embodiments, the material supply control system further includes a carrier gas conveying pipeline, and the spray gun 10 is connected to the carrier gas conveying pipeline. The material pressure obtained by the spray pressure detection component 8 is the first spray pressure, the spray pressure of the carrier gas conveying pipeline is the second spray pressure, the depth of the nozzle of the spray gun 10 in the smelting pool 11 is the immersion depth, and the spray pressure of the spray gun 10 is determined by the first spray pressure, the second spray pressure, and the immersion depth.

[0036] Specifically, when the injection pressure is detected to be less than the lower limit of the pressure threshold range, the first injection pressure and the second injection pressure are increased, or the immersion depth is reduced. This ensures stable material delivery from the spray gun 10, which is beneficial to improving the smelting efficiency of metals.

[0037] Optionally, when the injection pressure is detected to be greater than the upper limit of the pressure threshold range, the first injection pressure and the second injection pressure are reduced, or the immersion depth is increased. This can ensure stable material delivery by the spray gun 10, which is beneficial to improving the smelting efficiency of metal.

[0038] In some embodiments, such as Figure 3As shown, the spray gun 10 includes a central powder channel 101, an annular cooling gas channel 102, and an auxiliary swirling gas channel 103. The central powder channel 101 is connected to the material spraying and conveying mechanism 2 through a pipeline, and the annular cooling gas channel 102 is connected to the oxidant supply source, thereby ensuring stable spray pressure and uniform material conveying flow field.

[0039] In some embodiments, the spray gun 10 further includes a swirl generator (not shown in the figure), the swirl generator has built-in guide vanes, and the angle, shape and arrangement of the guide vanes can be set according to the relevant parameters of the material conveyed by the spray gun 10. This embodiment does not make specific limitations on this.

[0040] In some embodiments, the spray gun 10 includes a water-cooled structure or an air-cooled structure.

[0041] In some embodiments, the top of the spray gun 10 is provided with a position detection sensor, an angle detection sensor, and a liquid level detection sensor.

[0042] Specifically, the position detection sensor is used to obtain the insertion position of the spray gun 10, the angle detection sensor is used to obtain the tilt angle of the spray gun 10, and the liquid level detection sensor is used to obtain the immersion depth of the spray gun 10.

[0043] Furthermore, the control unit 12 is used to adjust the flow field, temperature field and concentration field in the top-blown furnace 9 according to the insertion position, angle and immersion depth of the spray gun 10, and to optimize the installation position of the spray gun 10 through numerical simulation to ensure matching with the top-blown furnace 9 and avoid local over-erosion and stress concentration.

[0044] In some embodiments, along the direction of the material pipeline 4, the pressure of the pressure distributor 5 gradually decreases from one end near the mixing spray device 1 to the end away from the mixing spray device 1.

[0045] In some embodiments, the spacing between multiple pressure-reducing branch pipes 7 is 1~5 m, and the pressure decrease gradient along the pipe is 0.02~0.05 MPa / m; the pressure decrease process of the pressure-reducing branch pipes 7 is realized through the pressure distributor 5. The pressure drop of the powder in the pipeline is positively correlated with the pipe length, solid-gas ratio, and flow velocity; if the pipeline is long and there is no segmented pressure reduction, the pressure at the end may be excessively reduced, far exceeding the lower limit of the spray pressure threshold; by arranging the pressure-reducing branch pipes at a spacing of 1~5 m, and with the pressure decreasing from near the mixing end to near the spray gun end at a gradient of 0.02~0.05 MPa / m (while keeping the pressure-reducing pressure at each point lower than the main conveying outlet pressure to prevent backflow), the pressure energy that exactly offsets the friction and local resistance loss along the pipe section can be supplemented in each pipe section, which is conducive to maintaining the pressure of each section during the conveying process. Because the pressure gradient along the pipeline is controllable and monotonically decreasing, it avoids sudden changes in local flow velocity caused by single-point high-pressure replenishment; the injection pressure changes detected by the control unit are more linear and predictable, making it easier for the reverse linkage regulation of pressurization and flow reduction / pressure reduction and flow increase to converge to a steady state. It avoids the control process from falling into oscillations such as compensation-overshoot-recompensation due to nonlinear or far-from-linear pressure drop in the pipeline, or even irregular pressure drop, which is conducive to improving the controllability of system regulation and enhancing system stability.

[0046] Optionally, the pressure of the pressure distributor 5 is less than the outlet pressure of the material blowing and conveying mechanism 2. This ensures that the material is conveyed in the positive direction into the top-blown furnace 9, and avoids excessive pressure in the pressure supplementing branch pipe 7, which could cause material backflow and inhibit material conveying.

[0047] Optionally, the pressure-replenishing pipeline 6 uses an arc-shaped transition connection at the location where the pipeline direction changes. This helps reduce the pressure drop at the bend, thereby providing a stable and more precise preset pressure for material conveying. Preferably, the radius of curvature of the arc-shaped pipeline section at the transition connection is ≥3 times the pipe diameter. The arc-shaped pipeline (R / D≥3) allows the airflow to smoothly change direction, effectively reducing the relative impact velocity between the airflow and the pipe wall, lowering the local resistance coefficient, and the bend setting of the pressure-replenishing branch pipe makes the pressure signal obtained by the pressure injection detection component closer to the preset pressure. The control unit executes linkage control accordingly, achieving more precise control and avoiding the possibility of pressure instability caused by compensation overshoot.

[0048] In some embodiments, the mixing and blowing device 1 further includes a material drying assembly; the material drying assembly includes a drying component and a moisture content detection component, the moisture content detection component being used to detect the moisture content in the material to ensure that the material meets the usage requirements. Optionally, the moisture content of the material after drying is generally required to be less than 1%, which is beneficial for subsequent metal smelting.

[0049] Based on the same inventive concept, such as Figure 4 As shown, this embodiment of the invention also provides a feeding control method for a top-blown furnace 9. Based on the feeding control system described in the foregoing embodiments, the feeding control method includes: S100, obtain the material pressure obtained by the injection pressure detection component 8.

[0050] S200, based on the material pressure obtained by the spray pressure detection component 8, adjust the outlet pressure of the material spraying and conveying mechanism 2, the pressure of the pressure distributor 5, and the material flow rate so that the spray pressure and flow rate of the material are controlled within a preset range.

[0051] Optionally, the detection and specific adjustment methods of material pressure in the above embodiments include: When the material pressure is detected to be less than the lower limit of the pressure threshold range, the outlet pressure of the material blowing and conveying mechanism 2 and / or the pressure of the pressure distributor 5 are increased, and the flow rate of the material is reduced.

[0052] When the material pressure is detected to be greater than the upper limit of the pressure threshold range, the outlet pressure of the material blowing and conveying mechanism 2 and / or the pressure of the pressure distributor 5 are reduced, and the flow rate of the material is increased.

[0053] Optionally, the feeding control method further includes: The core parameters affecting the blasting effect are determined, including carrier gas flow rate and pressure, powder conveying rate, 10-meter immersion depth of the spray gun, furnace pressure, melt temperature and composition.

[0054] By utilizing the massive amounts of data generated from numerical simulations and industrial test data, a deep learning model is constructed with injection stability and smelting efficiency as optimization objectives.

[0055] Develop model-based predictive control or reinforcement learning algorithms to dynamically optimize the immersion depth and airflow ratio parameters of the spray gun 10 in real time.

[0056] This embodiment detects the injection parameters and uses a model to optimize and adjust the relevant parameters of the spray gun 10. This helps to intelligently suppress periodic pressure pulses and difficulties in the penetration of particulate materials, achieving adaptive and stable operation of the injection process and preventing clogging of the spray gun 10. The specific model and algorithm are not the core protection of this application and will not be presented in detail here. It is understood that the aforementioned models facilitate obtaining better process operating parameters and dynamic adjustments, but they are not the only way to obtain relevant process parameters. Feasible relevant process parameters can still be obtained through historical data, experimental data, etc. Based on existing methods that only supplement pressure without adjusting flow rate or only adjust flow rate without supplementing pressure, this application provides a top-blown furnace feeding system and corresponding control method. It is understood that the improved settings of the above system and the corresponding optimized control method are significantly different from existing technologies, achieving effects such as more stable and controllable system performance, which can be clearly obtained in conjunction with the foregoing content.

[0057] In the description of this invention, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0058] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0059] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. In the description of this specification, specific features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A feeding control system for a top-blown furnace, characterized in that, include: A mixing and blowing device includes a blowing cylinder, a mixing mechanism is provided at the top of the blowing cylinder, and a material blowing and conveying mechanism is provided at the bottom of the blowing cylinder for pressurizing and conveying the mixed material outward. A top-blown furnace is provided, wherein a spray gun is provided inside the top-blown furnace, and the spray gun is connected to the material spraying and conveying mechanism through a material pipeline; a spray pressure detection component is provided near the spray gun in the material pipeline, and the spray pressure detection component is used to detect the material pressure before entering the spray gun; the spray gun is provided with a flow control component for controlling the material flow rate; A pressure-replenishing device includes a pressure-replenishing pipeline arranged in parallel along the material pipeline. The pressure-replenishing pipeline is connected to different positions of the material pipeline through pressure-replenishing branch pipes, and the pressure of the pressure-replenishing branch pipes is controlled by a pressure distributor. The control unit is electrically connected to the injection pressure detection component, the flow control component, the pressure distributor, and the material injection and conveying mechanism, respectively. It is used to adjust the outlet pressure of the material injection and conveying mechanism, the pressure of the pressure distributor, and the material flow rate according to the material pressure obtained by the injection pressure detection component, so as to control the injection pressure and flow rate of the material within a preset range.

2. The feeding control system for the top-blown furnace according to claim 1, characterized in that, The control unit is used to adjust the outlet pressure of the material injection and conveying mechanism, the pressure of the pressure distributor, and the material flow rate based on the material pressure obtained by the injection pressure detection component, so that the injection pressure and flow rate of the material are controlled within a preset range, specifically including: When the material pressure is detected to be less than the lower limit of the pressure threshold range, the outlet pressure of the material blowing and conveying mechanism and / or the pressure of the pressure distributor are increased, and the flow rate of the material is reduced. Alternatively, when the material pressure is detected to be greater than the upper limit of the pressure threshold range, the outlet pressure of the material blowing and conveying mechanism and / or the pressure of the pressure distributor are reduced, and the flow rate of the material is increased.

3. The feeding control system for the top-blown furnace according to claim 2, characterized in that, Also includes: A carrier gas delivery pipeline, wherein the spray gun is connected to the carrier gas delivery pipeline; The material pressure obtained by the spray pressure detection component is the first spray pressure, the spray pressure of the carrier gas conveying pipeline is the second spray pressure, the depth of the nozzle of the spray gun in the melting pool inside the top blown furnace is the immersion depth, and the spray pressure of the spray gun is determined by the first spray pressure, the second spray pressure and the immersion depth. When the injection pressure is detected to be less than the lower limit of the pressure threshold range, the first injection pressure and the second injection pressure are increased, or the immersion depth is decreased; or, when the injection pressure is detected to be greater than the upper limit of the pressure threshold range, the first injection pressure and the second injection pressure are decreased, or the immersion depth is increased.

4. The feeding control system for the top-blown furnace according to any one of claims 1-3, characterized in that, Along the direction of the material pipeline, the pressure of the pressure distributor gradually decreases from the end near the mixing and blowing device to the end away from the mixing and blowing device.

5. The feeding control system for the top-blown furnace according to claim 4, characterized in that, The pressure of the pressure distributor is less than the outlet pressure of the material blowing and conveying mechanism.

6. The feeding control system for the top-blown furnace according to claim 1, characterized in that, The pressure-replenishing pipeline uses an arc-shaped pipeline transition connection at the location where the pipeline direction changes.

7. The feeding control system for the top-blown furnace according to claim 3, characterized in that, The top of the spray gun is equipped with a position detection sensor, an angle detection sensor, and a liquid level detection sensor. The position detection sensor is used to obtain the insertion position of the spray gun, the angle detection sensor is used to obtain the tilt angle of the spray gun, and the liquid level detection sensor is used to obtain the immersion depth of the spray gun. The control unit is used to adjust the installation position of the spray gun according to the insertion position, angle, and immersion depth of the spray gun.

8. The feeding control system for the top-blown furnace according to claim 1, characterized in that, The mixing and blowing device further includes a material drying component; the material drying component includes a drying element and a moisture content detection element, the moisture content detection element being used to detect the moisture content in the material.

9. A method for controlling the feeding of a top-blown furnace, characterized in that, Based on any one of claims 1-8, the feeding control system and the feeding control method include: Obtain the material pressure acquired by the injection pressure detection component; Based on the material pressure obtained by the injection pressure detection component, the outlet pressure of the material injection and conveying mechanism, the pressure of the pressure distributor, and the material flow rate are adjusted so that the injection pressure and flow rate of the material are controlled within a preset range.

10. The material feeding control method according to claim 9, characterized in that, Based on the material pressure obtained by the injection pressure detection component, the outlet pressure of the material injection conveying mechanism, the pressure of the pressure distributor, and the material flow rate are adjusted to control the injection pressure and flow rate of the material within a preset range, including: When the material pressure is detected to be less than the lower limit of the pressure threshold range, the outlet pressure of the material blowing and conveying mechanism and / or the pressure of the pressure distributor are increased, and the flow rate of the material is reduced. Alternatively, when the material pressure is detected to be greater than the upper limit of the pressure threshold range, the outlet pressure of the material blowing and conveying mechanism and / or the pressure of the pressure distributor are reduced, and the flow rate of the material is increased.

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