Stirring zone-settlement zone separation device of bottom blowing furnace, control system and method

Abstract

The invention relates to the technical field of non-ferrous metal smelting, in particular to a bottom blowing furnace stirring area-settling area separation device and a control system and method. The device comprises a feeding port, gear sets are arranged on the two sides of the bottom blowing furnace respectively, the feeding port and a flue are formed in the upper portion of the bottom blowing furnace, and a burner is obliquely upwards formed in the side face, close to one side of the feeding port, of the bottom blowing furnace. An auxiliary burner is obliquely and upwards arranged above one side close to the flue, and a slag discharge port is obliquely and downwards arranged below the auxiliary burner; a bottom blowing spray gun is arranged at the bottom of the bottom blowing furnace under the feed port, and a sulfonium discharge port is arranged at the bottom of the bottom blowing furnace under the flue; a movable baffle is arranged between the bottom blowing spray gun and the sulfonium discharging opening, the bottom blowing furnace is divided into a stirring area and a standing area, the stirring area is arranged on one side of the burner, and the standing area is arranged on one side of the auxiliary burner; the system comprises a lifting device, a bottom blowing furnace, a data acquisition and feedback module and an intelligent calculation module. According to the invention, liquid level fluctuation can be effectively prevented from being transferred from a stirring area to a slag discharge port; and the slag-sulfonium two phases in the settling area are stably separated.

Description

Technical Field

[0001] The present invention relates to the technical field of nonferrous metal smelting, and in particular to a stirring zone-settling zone separation device, a control system and a method for a bottom blowing furnace. Background Art

[0002] Bottom-blown furnaces are widely used in the smelting of non-ferrous metals such as nickel and lead. In a bottom-blown furnace, a bottom-blowing lance is arranged on one side just below the charging port of the furnace body. During the process of blowing oxygen-enriched air from the lance, the slag-matte phase in the area just above the lance is violently stirred and fully in contact with the gas phase, thereby enhancing the reaction rate. The reacted melt flows to the other side of the bottom-blown furnace for sedimentation, achieving slag-matte separation. The separated matte phase is discharged through the discharge port located in the sedimentation zone, and the slag phase is discharged through the slag discharge port. In this bottom-blown smelting process, there are the following two problems: (1) The violent liquid level fluctuations in the stirring zone will be transmitted to the sedimentation zone, resulting in slag surge at the slag discharge port, which seriously affects the stability of the slag discharge process and endangers production safety; (2) The stirring zone and the sedimentation zone are located in the same flow field, and the melt momentum is transmitted from the stirring zone to the sedimentation zone, which seriously affects the separation rate of the slag-matte phase in the sedimentation zone, thereby causing a decrease in product quality. In order to solve these problems, the present invention proposes a stirring zone-settling zone separation device and an intelligent control system thereof applied to a bottom blowing furnace.

[0003] Prior art 1, Chinese patent, application number 202210683964.5 discloses a bottom blowing gun, a converter and a bottom blowing method. The bottom blowing gun is used to bottom blow the molten steel in the converter. The bottom blowing gun includes an outer appearance, an inner tube and a bottom blowing pipe. The inner tube is coaxially arranged in the outer tube, and there is an annular gap between the inner tube and the outer tube for introducing inert gas; there are multiple bottom blowing pipes, multiple bottom blowing pipes are used to spray CO2 gas, and multiple bottom blowing pipes are arranged in the tube at intervals and parallel to the inner tube, and refractory materials are filled between the inner tube and the multiple bottom blowing pipes. Although it has a good stirring effect, is not easy to clog, has a long service life, and will not corrode the lining of the converter, extending the service life of the lining of the converter; however, the violent liquid level fluctuations in the stirring zone will be transmitted to the sedimentation zone, resulting in slag surge at the slag discharge port, which seriously affects the stability of the slag discharge process and endangers production safety.

[0004] Prior art 2, Chinese patent, application number 202410471599.0 discloses a bottom blowing energy supply method and system in a bottom blowing furnace, the method includes adding materials into the bottom blowing furnace and heating and smelting; after the materials begin to melt, combustible gas and protective gas are introduced into the bottom blowing furnace through the bottom blowing system at the same time, after the smelting is completed, the materials are discharged and the bottom blowing system is closed; wherein, the combustible gas and protective gas are introduced into the bottom blowing furnace through the bottom blowing system at the same time, specifically: combustible gas and protective gas are continuously sprayed into the bottom of the bottom blowing furnace from bottom to top, and at any gas nozzle, when the combustible gas and protective gas are in the bottom area of ​​the bottom blowing furnace, the protective gas gas flow is distributed around the outside of the combustible gas gas flow. Although the material temperature and heating efficiency are improved, the combustible gas is prevented from reacting with oxygen near the bottom blowing system, causing excessive temperature, thereby affecting the service life of the bottom blowing system; however, the maintenance cost of the bottom blowing system is high, especially when the gas supply components are frequently replaced, which may affect the overall economic benefits.

[0005] Prior art three, Chinese patent, application number 202410379454.8 discloses a masonry method for the active bottom of a bottom-blown oxygen and bottom-powder-sprayed converter, wherein a plurality of bottom spray guns are arranged on the active bottom of the furnace, two of which form a group, and the two bottom spray guns in each group are symmetrically arranged along the two sides of the center line of the converter ear axis, and each bottom spray gun is wrapped by two prefabricated refractory bricks with semicircular through grooves on the sides, and an overall protrusion higher than the furnace bottom is built between the two bottom spray guns in each group, and the overall protrusion is surrounded by a low-lying area; the overall protrusion is 240 to 300 mm higher than the furnace bottom. Although it can reduce the erosion of the bottom lance nozzle by molten steel, make the mushroom head formed above and around the bottom lance nozzle more stable, and better protect the bottom lance, thereby increasing the service life of the active furnace bottom, reducing the operating consumption and cost of refractory materials, reducing the frequency of furnace bottom replacement, and improving the converter operation rate; however, the stirring zone and the sedimentation zone are located in the same flow field, and the melt momentum is transferred from the stirring zone to the sedimentation zone, which seriously affects the separation rate of the slag-matte phases in the sedimentation zone, thereby resulting in a decrease in product quality.

[0006] At present, the existing technologies 1, 2 and 3 have the problem that the violent liquid level fluctuations in the stirring zone will be transmitted to the settling zone, resulting in slag surge at the slag discharge port, which seriously affects the stability of the slag discharge process and endangers production safety. The stirring zone and the settling zone are located in the same flow field, and the melt momentum is transmitted from the stirring zone to the settling zone, which seriously affects the separation rate of the slag-matte phases in the settling zone, thereby causing the product quality to decline. Therefore, the present invention proposes a stirring zone-settling zone separation device and an intelligent control system for a bottom blowing furnace. Summary of the invention

[0007] The main purpose of the present invention is to provide a bottom blowing furnace stirring zone-sedimentation zone separation device, control system and method to solve the problem in the prior art that the violent liquid level fluctuations in the stirring zone will be transmitted to the sedimentation zone, resulting in slag surge at the slag discharge port, seriously affecting the stability of the slag discharge process and endangering production safety. The stirring zone and the sedimentation zone are located in the same flow field, and the melt momentum is transmitted from the stirring zone to the sedimentation zone, which seriously affects the separation rate of the slag-matte phases in the sedimentation zone, thereby causing a decrease in product quality.

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

[0009] A bottom blowing furnace stirring zone-settling zone separation device comprises a feed port, wherein a gear set is provided on each side of the bottom blowing furnace, a feed port and a flue are provided above the bottom blowing furnace, a burner is provided on the side close to the feed port obliquely upward; an auxiliary burner is provided on the upper side close to the flue obliquely upward, and a slag discharge port is provided below the auxiliary burner obliquely downward; a bottom blowing lance is provided at the bottom of the bottom blowing furnace directly below the feed port, and a matte discharge port is provided at the bottom of the bottom blowing furnace directly below the flue; a movable baffle is provided between the bottom blowing lance and the matte discharge port, dividing the bottom blowing furnace into a stirring zone and a static zone, the burner side is the stirring zone, and the auxiliary burner side is the static zone.

[0010] As a further improvement of the present invention, the card slot structure includes:

[0011] One side of the upper part of the slot has a groove for fixing the movable baffle. One side of the lower part of the slot has a protruding table for supporting the movable baffle; considering that the melt in the bottom blowing furnace is at a high temperature of about 1400 degrees Celsius, the slot is built with magnesia-chromium refractory materials like the furnace body.

[0012] As a further improvement of the present invention, the movable baffle comprises:

[0013] The movable baffle is a trapezoidal structure with two lifting ears to facilitate the lifting of the movable baffle by the lifting device. The movable baffle is made of magnesium-chromium refractory material.

[0014] As a further improvement of the present invention, the movable baffle is fixed by a slot; the upper part of the movable baffle is connected to a lifting device by a wire rope, and the lifting device moves the movable baffle and replaces it to a different slot position, thereby isolating the stirring zone and the sedimentation zone from each other.

[0015] As a further improvement of the present invention, the lifting device comprises four parts: a crane, a square track, a steel wire rope and a hook;

[0016] The track is designed to be square, so that the movable baffle lifted by the crane can only move between the three groups of slots. The movement of the lifting device on the slide rail is set to three different gears, and the crane in different gears corresponds to the position directly above the three different groups of slots. The lifting height of the crane hook is set to three gears, one gear corresponds to the installation height of the movable baffle, one gear corresponds to the height of the movable baffle without contacting the top of the bottom blowing furnace and can leave the slot and move horizontally with the lifting device, and the last gear corresponds to the height when the wire rope is fully retracted by the crane.

[0017] To achieve the above object, the present invention also provides the following technical solutions:

[0018] A control system for a bottom blowing furnace stirring zone-settling zone separation device, comprising:

[0019] A lifting device is used to move the movable baffle and replace it to different slot positions, thereby isolating the stirring zone and the settling zone from each other and adjusting the range of the two;

[0020] Bottom blowing furnace, used to arrange movable baffles, card slots and pressure sensors, etc.;

[0021] The data acquisition and feedback module is used to arrange pressure sensors outside the furnace body in the stirring zone and the settling zone to collect real-time pressure data of asymmetric oscillations caused by intense stirring on one side of the furnace body and relatively slow melt flow on the other side, and transmit it to the intelligent calculation module;

[0022] The intelligent calculation module is used to calculate the flow field conditions under three different movable baffle positions based on the fluid mechanics method according to the input initial data such as bottom blowing flow rate, slag layer and matte layer thickness, density and viscosity; and to obtain and record the optimal movable baffle position based on the computational fluid dynamics simulation results and real-time pressure data; when the furnace is shut down, the lifting device can be operated to be located in different gears to complete the replacement of the movable baffle position.

[0023] As a further improvement of the present invention, the intelligent computing module includes:

[0024] The VOF model submodule is used to define the gas phase as the primary phase, the slag and matte phases as the secondary phases, calculate the volume fraction of the gas phase, and derive the continuity equation and momentum equation of the VOF model;

[0025] The continuous surface tension model submodule is used to calculate the continuous surface tension model (CSF), calculate the subgrid scale stress (SGS) of the LES model, and calculate the eddy viscosity of the melt using the wall-adaptive local eddy viscosity model;

[0026] The three-phase flow prediction submodule predicts the gas-matte-slag three-phase flow conditions under different movable baffle positions based on the calculated continuity equation and momentum equation combined with the melt eddy viscosity.

[0027] As a further improvement of the present invention, the VOF model submodule includes:

[0028] The continuity equation unit is used to define the gas phase as the primary phase, and the slag and matte phases as the secondary phases, so the continuity equation of the VOF model can be expressed as follows:

[0029]

[0030] Among them, α slag is the volume fraction of slag phase; α matte is the volume fraction of the matte phase; ρ slag is the slag phase density; ρ matte is the density of the matte phase; is the slag phase velocity vector; is the velocity vector of the matte phase;

[0031] The gas phase volume fraction unit is used to calculate the gas phase volume fraction. The gas phase volume fraction can be calculated by the following formula:

[0032] α g +α matte +α slag =1

[0033] Among them, α g is the gas phase volume fraction;

[0034] The momentum equation unit is used to calculate the velocity field shared by all phases. The VOF model only solves one momentum equation, which has the following form:

[0035]

[0036] in, is the acceleration due to gravity; is the velocity vector; μ and ρ are the mixed viscosity and mixed density in the unit cell, respectively, and have the following form:

[0037] ρ=α slag ρ slag +α matte ρ matte +(1-α slag -α matte )ρ g

[0038] μ=α slag μ slag +α matte μ matte+(1-α slag -α matte )μ g

[0039] Among them, μ slag is the viscosity of the slag phase; μ matte is the viscosity of the sulfide phase; μ g is the gas phase viscosity.

[0040] As a further improvement of the present invention, the continuous surface tension model submodule includes:

[0041] The surface tension model unit is used to introduce a continuous surface tension model, which has the following form:

[0042]

[0043] Among them, p2 and p1 are the pressures on both sides of the interface; σ is the surface tension coefficient; R1 and R2 are the two radii in orthogonal directions used to measure the curvature.

[0044] The grid-scale stress unit is used to introduce the LES model and calculate the sub-grid-scale stress. The calculation formula is as follows:

[0045]

[0046] Among them, τ kk is the isotropic part of the subscale stress; μ t is the eddy viscosity; is the strain tensor, which can be calculated by the following formula:

[0047]

[0048] The eddy viscosity model unit is used to introduce the wall adaptive local eddy viscosity model to calculate the lower eddy viscosity μt. The calculation formula is as follows:

[0049]

[0050] in, is the strain rate tensor at the analytical scale; is the traceless symmetric part of the square of the velocity gradient tensor; L s is the subscale mixing length, which can be calculated by the following formula:

[0051] L s =min(κd,C w V 1 / 3 )

[0052] Where d is the distance to the nearest wall; d is the calculation unit volume; κ is the von Karman constant; C w is the WALE constant.

[0053] To achieve the above object, the present invention also provides the following technical solutions:

[0054] A method for controlling a bottom blowing furnace stirring zone-settling zone separation device, comprising:

[0055] Pressure sensors are arranged outside the furnace in the stirring zone and the settling zone to collect real-time pressure data of asymmetric oscillations caused by intense stirring on one side of the furnace and relatively slow melt flow on the other side, and transmit the data to the intelligent calculation module;

[0056] According to the input initial data such as bottom blowing flow rate, slag layer and matte layer thickness, density and viscosity, the flow field conditions under three different movable baffle positions are calculated based on the fluid mechanics method; and the optimal movable baffle position is obtained and recorded based on the computational fluid dynamics simulation results and real-time pressure data;

[0057] When the furnace is shut down, the lifting device is operated to be located in different gears, the movable baffle is moved and replaced to different slot positions, thereby isolating the stirring zone and the sedimentation zone from each other, and adjusting the ranges of the two to complete the replacement of the movable baffle position.

[0058] The present invention proposes a stirring zone-settling zone separation device and its intelligent control system for bottom blowing furnace. The device arranges a movable baffle between the stirring zone and the settling zone, which can effectively block the liquid level fluctuation from being transmitted from the stirring zone to the slag discharge port on the one hand; on the other hand, it can control most of the kinetic energy input by the bubble within the stirring zone, so that the slag-matte two phases in the settling zone are stably separated; the device is connected to the intelligent control platform, which can realize the accurate prediction and regulation of the reasonable movable baffle position; the stirring zone-settling zone separation device and its intelligent control system can realize the improvement of smelting efficiency and product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] Figure 1 It is a structural diagram of an embodiment of a stirring zone-settling zone separation device of a bottom blowing furnace of the present invention;

[0060] Figure 2 It is a schematic diagram of an embodiment of a stirring zone-settling zone separation device of a bottom blowing furnace of the present invention;

[0061] Figure 3 This is a structural diagram of a slot structure of an embodiment of a bottom blowing furnace stirring zone-settling zone separation device of the present invention;

[0062] Figure 4 This is a structural diagram of a movable baffle of an embodiment of a bottom blowing furnace stirring zone-settling zone separation device of the present invention;

[0063] Figure 5This is a structural diagram of a lifting device of an embodiment of a bottom blowing furnace stirring zone-settling zone separation device of the present invention;

[0064] Figure 6 This is a schematic diagram of a lifting device of an embodiment of a bottom blowing furnace stirring zone-settling zone separation device of the present invention;

[0065] Figure 7 It is a functional module diagram of an embodiment of a control system of a stirring zone-settling zone separation device of a bottom blowing furnace of the present invention;

[0066] Figure 8 It is a schematic diagram of an embodiment of a control system of a stirring zone-settling zone separation device of a bottom blowing furnace of the present invention;

[0067] Fig. 9 It is a flowchart of one embodiment of a control method for a stirring zone-settling zone separation device of a bottom blowing furnace according to the present invention;

[0068] Fig.10 It is a structural schematic diagram of an embodiment of an electronic device of the present invention;

[0069] Fig.11 It is a schematic structural diagram of an embodiment of the storage medium of the present invention. DETAILED DESCRIPTION

[0070] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0071] The terms "first", "second" and "third" in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" and "third" can explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined. All directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication also changes accordingly. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally also includes steps or units that are not listed, or optionally also includes other steps or units inherent to these processes, methods, products or devices.

[0072] Reference to an "embodiment" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0073] like Figure 1 and Figure 2 As shown, this embodiment provides an embodiment of a stirring zone-settling zone separation device for a bottom blowing furnace. In this embodiment, the stirring zone-settling zone separation device for a bottom blowing furnace specifically includes: a feed port 1, a gear set 2, a burner 3, a bottom blowing lance 4, a matte discharge port 5, a slag discharge port 6, an auxiliary burner 7, a flue 8, a movable baffle 9, a stirring zone 10, a static zone 11, a lifting device 18, a wire rope 19, a card slot 20 and a pressure sensor 21;

[0074] There is a gear set 2 on each side of the bottom blowing furnace, a feed port 1 and a flue 8 are provided above the bottom blowing furnace, a burner 3 is provided obliquely upward on the side near the feed port; an auxiliary burner 7 is provided obliquely upward on the upper side near the flue 8, and a slag discharge port 6 is provided obliquely downward below the auxiliary burner 7; a bottom blowing lance 4 is provided at the bottom of the bottom blowing furnace directly below the feed port 1, and a matte discharge port 5 is provided at the bottom of the bottom blowing furnace directly below the flue 8; a movable baffle 9 is provided between the bottom blowing lance 4 and the matte discharge port 5, dividing the bottom blowing furnace into a stirring zone 10 and a static zone 11, the side of the burner 3 is the stirring zone 10, and the side of the auxiliary burner 7 is the static zone 11;

[0075] Preferably, the present embodiment is mainly composed of three parts: a slot 20, a movable baffle 9 and a lifting device 18. Three groups of slots 20 at different positions are stacked inside the furnace body using magnesia refractory bricks, and the movable baffle 9 is fixed by the slots 20; according to the feedback of the intelligent control system, when the bottom blowing furnace is shut down, the upper part of the movable baffle 9 is connected to the lifting device 18 through a steel wire rope 19, and the lifting device 18 moves the movable baffle 9 and replaces it to a different slot 20 position, thereby isolating the stirring zone 10 and the sedimentation zone 11 from each other, and adjusting the range of the two. Two small strip-shaped openings need to be opened on the top of the furnace body to allow the steel wire rope 19 to pass through the top of the furnace body to connect to the movable baffle 9; considering that the furnace body itself is not sealed, the opening areas of the flue and the feeding port are larger than the area of ​​the small strip-shaped opening, so this opening scheme is feasible (refer to the attached for the specific schematic diagram). Figure 2 ).

[0076] In summary, this embodiment proposes a stirring zone-settling zone separation device and its intelligent control system for a bottom-blown furnace. The device arranges a movable baffle 9 between the stirring zone 10 and the settling zone 11. On the one hand, it can effectively block the liquid level fluctuation from being transmitted from the stirring zone 10 to the slag discharge port 6; on the other hand, it can control most of the kinetic energy input by the bubble within the stirring zone 10, so that the slag-matte two phases in the settling zone are stably separated; the device is connected to the intelligent control platform, which can realize the accurate prediction and regulation of the reasonable position of the movable baffle 9; the stirring zone-settling zone separation device and its intelligent control system can achieve the improvement of smelting efficiency and product quality.

[0077] Furthermore, if Figure 3 As shown, in the bottom blowing furnace stirring zone-settling zone separation device of this embodiment, the card slot 20 specifically includes:

[0078] One side of the upper part of the slot 20 has a groove for fixing the movable baffle 9. One side of the lower part of the slot 20 has a protruding table for supporting the movable baffle 9. Considering that the melt in the bottom blowing furnace is at a high temperature of about 1400 degrees Celsius, the slot 20 is built with magnesia-chromium refractory materials like the furnace body.

[0079] Preferably, the groove of this embodiment is designed to fix the movable baffle 9, ensuring that the movable baffle 9 can be stably installed in the slot 20 and is not easy to slip or move, thereby increasing the contact area and friction between the movable baffle 9 and the slot 20, thereby improving the stability of the movable baffle 9; the protruding table is mainly used to support the movable baffle 9, disperse the pressure on the movable baffle 9, and enhance the stability of the structure; through the design of the protruding table, the movable baffle 9 can maintain a certain tension and stability after installation, further improving its weighing capacity and service life; magnesium-chromium refractory material has the advantages of high operating temperature, good high-temperature volume stability, strong slag corrosion resistance, etc., and can withstand high temperature environment of up to about 1400 degrees Celsius in the bottom blowing furnace; the stability and durability of the slot 20 and the furnace body at high temperature are guaranteed, and the service life of the equipment is extended.

[0080] In summary, through the design of the upper and lower parts of the slot 20 and the selection of magnesia-chromium refractory materials in this embodiment, the stability of the entire equipment in a high temperature environment is significantly improved; it helps to ensure the normal operation of the bottom blowing furnace and reduce production interruptions caused by equipment failures; the design of the concave and convex grooves and the use of magnesia-chromium refractory materials jointly enhance the structural strength of the equipment, so that the equipment can better withstand the scouring and erosion of the high-temperature melt and extend the service life of the equipment; the design of the slot 20 makes the installation and disassembly of the movable baffle 9 simple and quick, reducing maintenance costs and time; at the same time, the modular stacking method of magnesia-chromium refractory materials also facilitates the rapid maintenance and replacement of equipment; the stability and durability of the equipment are improved, which helps to reduce production interruptions and equipment failures, thereby improving production efficiency; the characteristics of easy installation and maintenance also help to shorten downtime and further improve production efficiency.

[0081] Furthermore, if Figure 4 As shown, in the bottom blowing furnace stirring zone-settling zone separation device of this embodiment, the movable baffle 9 specifically includes:

[0082] The movable baffle plate 9 is a trapezoidal structure with two lifting ears thereon, which facilitate the lifting device 18 to lift the movable baffle plate 9. The movable baffle plate 9 is made of magnesium-chromium refractory material.

[0083] Preferably, the design of the trapezoidal structure of this embodiment enhances the strength and stability of the movable baffle 9; the trapezoid has better mechanical properties than the rectangle, can withstand greater pressure and shear force, and is not easy to deform or break; the trapezoidal structure is visually guiding, which helps to guide the movable baffle 9 to be correctly placed during operation or installation; the lifting ear structure facilitates the lifting device 18 to lift and move the movable baffle 9, ensuring safety and stability during the lifting process; the position and number of the lifting ears are carefully designed to ensure that the movable baffle 9 is evenly stressed during the lifting process to avoid excessive stress concentration or deformation; the magnesia-chromium refractory material has extremely high refractoriness and high-temperature volume stability, and can maintain good structural integrity and performance in a high-temperature environment; it has strong resistance to alkaline slag and certain acidic slag, and can effectively resist the scouring and erosion of high-temperature molten slag and gas; the magnesia-chromium refractory material has a low thermal expansion coefficient, has good thermal shock resistance, and can adapt to drastic temperature changes without being easy to break.

[0084] To summarize, the present embodiment improves the durability and reliability of the movable baffle in a high temperature environment, ensuring that it can withstand the scouring and erosion of high temperature slag and gas for a long time; reduces equipment downtime and maintenance costs caused by damage to the movable baffle 9 by enhancing the structural strength; simplifies the installation and disassembly process of the movable baffle 9, and improves work efficiency and safety; reduces the potential risk of damage to the movable baffle 9 and the lifting device 18 during the lifting process by optimizing the lifting lug design; improves the service life and reliability of the movable baffle 9 in a high temperature environment, and reduces equipment downtime and maintenance costs caused by material damage; and ensures that the movable baffle 9 can maintain its structural and functional integrity under extremely harsh working conditions by adopting high-performance magnesia-chromium refractory materials. The wide application of magnesia-chromium refractory materials helps to improve the operating efficiency and safety of the overall equipment and reduce production costs.

[0085] Furthermore, if Figure 5 and Figure 6 As shown, in the bottom blowing furnace stirring zone-settling zone separation device of this embodiment, the lifting device 18 includes: a crane 22, a square track 23, a wire rope 19 and a hook 24;

[0086] The square track 23 is designed to be square, and its purpose is to make the movable baffle 9 lifted by the crane 22 move only within the three groups of slots 20. The movement of the lifting device 18 on the square track 23 is set to three different gears, and the crane 22 in different gears corresponds to the position directly above the three different groups of slots 20. The lifting height of the hook 24 of the crane 22 is set to three gears, one gear corresponds to the installation height of the movable baffle 9, one gear corresponds to the height of the movable baffle 9 without contacting the top of the bottom blowing furnace and can leave the slot 20 and move horizontally with the lifting device, and the last gear corresponds to the height when the wire rope 19 is completely retracted by the crane.

[0087] Among them, the motion control equation of the crane is expressed as:

[0088]

[0089] In the formula, F control (t) represents the control force of the crane at time t; x i′ (t) represents the position function of the crane in the i′th gear position, i′=1, 2, 3 correspond to three gear positions respectively; α i′ represents the weight coefficient of the i′th gear, indicating the contribution of different gears to the control force; β i′ represents the damping coefficient of the i′th gear, which is used to describe the resistance of the crane movement; γ i′ represents the elastic coefficient of the i′th gear, which represents the elastic restoring force of the crane during movement; δ represents the amplitude of the external disturbance, which represents the external disturbance to which the crane is subjected during movement; ω represents the frequency of the external disturbance; φ represents the phase angle of the external disturbance;

[0090] The height control equation of the crane hook is:

[0091]

[0092] In the formula, H hook (t) represents the height of the crane hook at time t; H0 represents the initial height, i.e., the reference position of the crane hook; h j′ (t) represents the height variation function under the j′th gear position, j′=1, 2, 3 correspond to three gear positions respectively; η j′ represents the height adjustment coefficient of the j′th gear, indicating the contribution of different gears to the height; κ j′ represents the height damping coefficient of the j′th gear, which is used to describe the resistance of height adjustment; λ represents the external disturbance amplitude of height adjustment; ω h represents the external disturbance frequency of height adjustment; θ represents the external disturbance phase angle of height adjustment;

[0093] The control equation for the lateral motion of a crane on a square track is expressed as:

[0094]

[0095] Where, L lateral (t) represents the lateral position of the crane at time t; L0 represents the initial lateral position, i.e., the reference position of the crane; l k′ (t) represents the lateral position function under the k′th gear position, k′=1, 2, 3 correspond to three gear positions respectively; v k′ represents the lateral motion weight coefficient of the k′th gear; μ k′represents the lateral motion damping coefficient of the k′th gear; ξ k′ represents the lateral motion elastic coefficient of the k′th gear; ρ represents the external disturbance amplitude of the lateral motion; ω l represents the external disturbance frequency of lateral motion; ψ represents the external disturbance phase angle of lateral motion;

[0096] Combining the above three equations, we get the overall control equation of the crane:

[0097]

[0098] In the formula, C total (t) represents the overall control output of the crane at time t; σ represents the external disturbance amplitude of the overall control; ω c represents the external disturbance frequency of the overall control; Represents the external disturbance phase angle of the overall control; the above equation design fully considers the complexity of the crane's movement, height adjustment and lateral movement, and introduces external disturbance factors to make the model closer to the actual application scenario.

[0099] Preferably, the crane of this embodiment is used as the main lifting and moving device, and the vertical lifting and horizontal movement of the movable baffle 9 are realized through its hoisting mechanism and walking mechanism; the crane 22 has sufficient carrying capacity and stability to ensure that the movable baffle 9 can be safely and accurately lifted and moved during operation; the design of the square track 23 limits the moving range of the crane 22, ensuring that the movable baffle 9 lifted by the crane 22 can only move between the three predetermined groups of slots 20; the accidental collision of the movable baffle 9 with other parts of the bottom blowing furnace during movement is avoided, and the safety and accuracy of operation are improved; the wire rope 19, as a medium connecting the crane 22 and the movable baffle 9, has the characteristics of high strength, wear resistance and corrosion resistance; it can bear the weight of the movable baffle 9 and the heavy objects it carries, and realize the lifting and lowering movement of the movable baffle 9 under the action of the crane 22; the hook is used to connect the wire rope 19 and the movable baffle 9, and has the characteristics of easy connection and disconnection, strong carrying capacity and safety and reliability; the design of the hook 24 ensures the stability and safety of the movable baffle 9 during the lifting process.

[0100] In summary, this embodiment ensures the safety and accuracy of the movable baffle 9 during movement by limiting the moving range of the crane 22; helps to reduce the occurrence of operational errors and accidents, and improves the safety and reliability of the overall equipment; the setting of three different gears enables the crane 22 to accurately stay at the position directly above three groups of different slots 20, which is convenient for the installation and removal of the movable baffle 9; improves the flexibility and efficiency of operation, and reduces the difficulty and complexity of manual operation; the first gear corresponds to the file installation height, ensuring that the movable baffle 9 can be accurately installed in the slot 20; the second gear enables the movable baffle 9 to leave the slot 20 without contacting the top of the bottom blowing furnace and move laterally with the lifting device 18, avoiding collision and friction between the movable baffle 9 and the top of the bottom blowing furnace; the third gear corresponds to the height when the wire rope 19 is fully retracted by the crane, ensuring that the crane 22 can safely retract the wire rope 19 when it is not used, avoiding the drooping and entanglement of the wire rope 19.

[0101] like Figure 7 As shown, this embodiment also provides an embodiment of a control system for a bottom blowing furnace stirring zone-settling zone separation device. In this embodiment, the control system of the bottom blowing furnace stirring zone-settling zone separation device is applied to the bottom blowing furnace stirring zone-settling zone separation device in the above embodiment. The control system of the bottom blowing furnace stirring zone-settling zone separation device includes:

[0102] The lifting module 12 is used to move the movable baffle and replace it to different slot positions, thereby isolating the stirring zone and the settling zone from each other and adjusting the range of the two;

[0103] Bottom blowing furnace module 13, used for arranging movable baffles, card slots and pressure sensors, etc.;

[0104] The data acquisition and feedback module 14 is used to arrange pressure sensors outside the furnace body in the stirring zone and the settling zone to collect real-time pressure data of asymmetric oscillations caused by intense stirring on one side of the furnace body and relatively slow melt flow on the other side, and transmit the data to the intelligent calculation module;

[0105] The intelligent calculation module 15 is used to calculate the flow field conditions under three different movable baffle positions based on the fluid mechanics method according to the input initial data such as bottom blowing flow rate, slag layer and matte layer thickness, density and viscosity; and to obtain and record the optimal movable baffle position based on the computational fluid dynamics simulation results and real-time pressure data; when the furnace is shut down, the lifting device can be operated to be located in different gears to complete the replacement of the movable baffle position.

[0106] Preferably, the lifting module of this embodiment is used to move the movable baffle and replace it to different slot positions, isolate the stirring zone and the settling zone, and adjust the range of the two; by accurately moving the movable baffle, the effective isolation and range adjustment of the stirring zone and the settling zone are achieved; the bottom blowing furnace module is used to arrange the movable baffle, the slot and the pressure sensor, etc.; provide a stable platform for the arrangement of the movable baffle, the slot and the pressure sensor; the data acquisition and feedback module arranges the pressure sensor outside the furnace body, collects the real-time pressure data of the asymmetric oscillation, and transmits it to the intelligent calculation module; collects the pressure data outside the furnace body and the asymmetric oscillation situation in the reactor in real time; the intelligent calculation module calculates the flow field situation based on the fluid mechanics method, combines the real-time pressure data to obtain the optimal movable baffle position, and guides the lifting device to replace the movable baffle position when the furnace is shut down (for specific schematic diagrams, refer to the attached Figure 8 ).

[0107] In summary, this embodiment improves the flexibility and efficiency of the bottom blowing furnace operation, which helps to optimize the smelting process; ensures the stable operation of the entire control system, and provides a basis for data acquisition and intelligent computing; provides accurate data input for the intelligent computing module, which helps to accurately control the smelting process; realizes intelligent control of the smelting process, improves smelting efficiency and quality, and reduces energy consumption and costs.

[0108] Furthermore, in the control system of the stirring zone-settling zone separation device of the bottom blowing furnace in this embodiment, the intelligent computing module includes:

[0109] The VOF model submodule is used to define the gas phase as the primary phase, the slag and matte phases as the secondary phases, calculate the volume fraction of the gas phase, and derive the continuity equation and momentum equation of the VOF model;

[0110] The continuous surface tension model submodule is used to calculate the continuous surface tension model (CSF), calculate the subgrid scale stress (SGS) of the LES model, and calculate the eddy viscosity of the melt using the wall-adaptive local eddy viscosity model;

[0111] The three-phase flow prediction submodule predicts the gas-matte-slag three-phase flow conditions under different movable baffle positions based on the calculated continuity equation and momentum equation combined with the melt eddy viscosity.

[0112] Preferably, the VOF model submodule of this embodiment can more effectively track the distribution and changes of the gas phase in the flow by defining the gas phase as the main phase, which is crucial for understanding the gas phase behavior in multiphase flow; slag and matte are secondary phases, and their flow characteristics can be simulated by the interaction with the gas phase, thereby revealing their behavior in multiphase flow; the calculation of the gas phase volume fraction is the key to understanding the multiphase flow structure, which helps to analyze the proportion and distribution of the gas phase in the flow; it describes the principles of mass conservation and momentum conservation in the flow; the continuous surface tension model can simulate the surface tension effect in multiphase flow, which is important for understanding the interface stability and phase separation in the flow. The calculation of sub-grid scale stress is crucial for simulating turbulent flow in large eddy simulation, which helps to reveal the influence of turbulence on multiphase flow. It can more accurately simulate the turbulent flow in the near-wall area, thereby improving the accuracy of the simulation. The three-phase flow prediction submodule can more comprehensively simulate the gas-matte-slag three-phase flow by integrating the results of the VOF model and the CSF model. The calculation of eddy viscosity is crucial for understanding the influence of turbulence on multiphase flow, which helps to improve the accuracy and reliability of the simulation. By simulating the flow conditions under different movable baffle positions, it can provide valuable reference for the design and optimization of industrial processes.

[0113] In summary, the VOF model submodule of this embodiment provides a powerful tool for understanding multiphase flow by accurately simulating the interaction between the gas phase, slag phase and matte phase; it is of great significance for flow control, optimization design and improving production efficiency; the continuous surface tension model submodule provides deeper insights into the complex physical phenomena in multiphase flow by considering surface tension and turbulence effects; it provides strong support for multiphase flow control in industrial processes; it is of great significance for improving production efficiency, optimizing equipment design and reducing environmental pollution.

[0114] Furthermore, in the control system of the stirring zone-settling zone separation device of the bottom blowing furnace in this embodiment, the VOF model submodule includes:

[0115] The continuity equation unit is used to define the gas phase as the primary phase, and the slag and matte phases as the secondary phases, so the continuity equation of the VOF model can be expressed as follows:

[0116]

[0117] Among them, α slag is the volume fraction of slag phase; α matte is the volume fraction of the matte phase; ρ slag is the slag phase density; ρ matte is the density of the matte phase; is the slag phase velocity vector; is the velocity vector of the matte phase;

[0118] The gas phase volume fraction unit is used to calculate the gas phase volume fraction. The gas phase volume fraction can be calculated by the following formula:

[0119] α g +α matte +α slag =1

[0120] Among them, α g is the gas phase volume fraction;

[0121] The momentum equation unit is used to calculate the velocity field shared by all phases. The VOF model only solves one momentum equation, which has the following form:

[0122]

[0123] in, is the acceleration due to gravity; is the velocity vector; μ and ρ are the mixed viscosity and mixed density in the unit cell, respectively, and have the following form:

[0124] ρ=α slag ρ slag +α matte ρ matte +(1-α slag -α matte )ρ g

[0125] μ=α slag μ slag +α matte μ matte +(1-α slag -α matte )μ g

[0126] Among them, μ slag is the viscosity of the slag phase; μ matte is the viscosity of the sulfide phase; μ g is the gas phase viscosity.

[0127] Preferably, the continuity equation unit of this embodiment ensures the conservation of mass and volume of the fluid by solving the continuity dust prevention of the slag phase and the matte phase; the continuity equation describes the relationship between the fluid density, volume fraction and velocity, so that the model can accurately capture the changes of the fluid in time and space; the gas phase volume fraction unit determines the distribution and changes of the gas phase in the fluid system by calculating the gas phase volume fraction; combined with the continuity equation, the gas phase volume fraction unit can update the volume fraction of each phase in the fluid system in real time, thereby reflecting the dynamic changes of the fluid interface; the momentum equation unit describes the velocity field and acceleration distribution of all phases in the fluid system by solving a shared momentum equation; the momentum equation takes into account the influence of multiple factors such as gravity, viscosity, pressure gradient and interphase force, so that the model can accurately simulate the dynamic behavior of the fluid system.

[0128] In summary, this embodiment achieves an accurate description of the dynamic behavior of the slag phase and the matte phase, providing a basis for simulating multiphase fluid systems; ensures the conservation of mass of the fluid during the simulation process, and improves the accuracy and reliability of the simulation; provides important information on the distribution of the gas phase in the fluid system, which helps to understand the overall structure and behavior of the fluid system; provides key data support for simulating the changes in the phase interface of the multiphase fluid system, and improves the accuracy and credibility of the simulation; achieves an accurate description of the dynamic behavior of the fluid system, and provides a powerful tool for understanding the motion laws and characteristics of the fluid system; and reduces the computational complexity and improves the simulation efficiency by solving the shared momentum equation.

[0129] Furthermore, in the control system of the stirring zone-settling zone separation device of the bottom blowing furnace in this embodiment, the continuous surface tension model submodule includes:

[0130] The surface tension model unit is used to introduce a continuous surface tension model, which has the following form:

[0131]

[0132] Among them, p2 and p1 are the pressures on both sides of the interface; σ is the surface tension coefficient; R1 and R2 are the two radii in orthogonal directions used to measure the curvature.

[0133] The grid-scale stress unit is used to introduce the LES model and calculate the sub-grid-scale stress. The calculation formula is as follows:

[0134]

[0135] Among them, τ kk is the isotropic part of the subscale stress; μ t is the eddy viscosity; is the strain tensor, which can be calculated by the following formula:

[0136]

[0137] The eddy viscosity model unit is used to introduce the wall adaptive local eddy viscosity model to calculate the lower eddy viscosity μt. The calculation formula is as follows:

[0138]

[0139] in, is the strain rate tensor at the analytical scale; is the traceless symmetric part of the square of the velocity gradient tensor; L s is the subscale mixing length, which can be calculated by the following formula:

[0140] L s =min(κd,C w V 1 / 3 )

[0141] Where d is the distance to the nearest wall; d is the calculation unit volume; κ is the von Karman constant; C w is the WALE constant.

[0142] Preferably, the surface tension model unit of this embodiment can accurately calculate the pressure difference on both sides of the phase interface by introducing a continuous surface tension model; the influence of curvature on surface tension is taken into account, and the curvature is measured by two radii in orthogonal directions, so as to more accurately describe the interface morphology; the grid-scale stress unit calculates the sub-grid scale stress by introducing the LES model, thereby improving the resolution and accuracy of the simulation; the sub-grid scale stress is calculated by using eddy viscosity and strain tensor, which can reflect the turbulent characteristics in the flow; the eddy viscosity model unit calculates the eddy viscosity by introducing an avoidance adaptive local eddy viscosity model, taking into account the complexity of avoiding nearby flows; the strain rate tensor of the analytical scale and the traceless symmetric part of the square of the velocity gradient tensor, as well as the sub-scale mixing length, are combined to more accurately describe the turbulent behavior near the wall.

[0143] In summary, in the multiphase flow simulation of this embodiment, surface tension is a key factor, which affects the stability of the interface and the flow behavior; the simulation accuracy is improved, which helps to have a deeper understanding of the multiphase flow phenomenon; in the turbulence simulation, the accurate calculation of sub-grid scale stress is crucial, which helps to capture the small-scale structure in the turbulence and improve the precision and credibility of the simulation; in the turbulence simulation near the wall, the accurate calculation of the eddy viscosity is the key; the simulation accuracy is improved, which helps to understand the complex mechanism of wall turbulence.

[0144] Furthermore, in the control system of the stirring zone-settling zone separation device of the bottom blowing furnace in this embodiment, the three-phase flow condition prediction submodule includes:

[0145] Meshing unit, meshing the physical mixing space of the bottom blowing furnace, and setting the corresponding boundary conditions and initial conditions;

[0146] The control equation unit simulates the dynamic evolution of three-phase flow by solving the continuity equation and momentum equation; based on the influence of melt eddy viscosity, the mass conservation is guaranteed to describe the velocity changes of each phase;

[0147] The result analysis unit predicts and calculates the gas-matte-slag three-phase flow, guides the convergence and stops the calculation, and obtains the influence of different movable baffle positions on the free liquid surface, velocity distribution and particle suspension characteristics through the prediction results; and verifies and optimizes it through experimental data and results.

[0148] in,

[0149] Where F(A) represents the function of the influence of different baffle positions A on the flow characteristics; Ω represents the entire computational domain; ρ represents the density of the fluid; u represents the fluid velocity vector; t represents time; n represents the unit vector of the external normal of the computational domain boundary; μ represents the dynamic viscosity of the fluid; D(u) represents the symmetric part of the velocity gradient tensor, also called the strain rate tensor; and f represents the external force vector acting on the fluid.

[0150] Preferably, the grid division unit of this embodiment can ensure the calculation accuracy of each area during the simulation process, especially in key areas such as near the movable baffle at the gas-liquid interface, by performing detailed grid division on the physical mixing space of the bottom blowing furnace; reasonable boundary condition setting can reflect the real physical environment, such as inlet and outlet flow rates, temperature, pressure, etc., so as to ensure the accuracy of the simulation results, and accurate initial conditions can reflect the initial state of the system; the control equation unit can simulate the dynamic evolution process of the three-phase flow in the bottom blowing furnace by solving the continuity equation and the momentum equation; the influence of the melt eddy viscosity is considered to ensure the conservation of mass, so as to accurately describe the velocity changes of each phase and improve the accuracy of the simulation; the result analysis unit predicts and calculates the gas-matte-slag three-phase flow, and can derive the influence of different movable baffle positions on the free liquid surface, velocity distribution and particle suspension characteristics; by guiding the convergence to stop the calculation, the stability and accuracy of the simulation results can be guaranteed; by comparing the experimental data with the simulation results, the accuracy of the simulation can be verified, and optimization and adjustment can be made as needed.

[0151] In summary, the detailed grid division and reasonable boundary and initial condition settings of this embodiment can significantly improve the accuracy of the simulation results and provide reliable data support for analysis and prediction; the flow conditions under different design schemes can be predicted through simulation, providing strong support for the optimal design of the bottom blowing furnace; the behavior characteristics of the three-phase flow in the bottom blowing furnace can be deeply understood through simulation, providing a scientific basis for optimizing operating parameters and process conditions; the simulation results can guide actual operations, optimize production efficiency and product quality; by simulating the influence of different movable baffle positions, the movable baffle design can be optimized to improve the mixing efficiency and production capacity of the bottom blowing furnace; through simulation and optimization, the operating parameters and process conditions can be adjusted to improve production efficiency and reduce production costs.

[0152] like Fig. 9 As shown, this embodiment also provides an embodiment of a control method for a bottom blowing furnace stirring zone-settling zone separation device. In this embodiment, the control method for a bottom blowing furnace stirring zone-settling zone separation device is applied to the bottom blowing furnace stirring zone-settling zone separation device in the above embodiment. The control method for a bottom blowing furnace stirring zone-settling zone separation device includes:

[0153] Step S1: pressure sensors are arranged outside the furnace in the stirring zone and the settling zone to collect real-time pressure data of asymmetric oscillations caused by intense stirring on one side of the furnace and relatively slow melt flow on the other side, and transmit the data to the intelligent calculation module;

[0154] Step S2: Based on the input initial data such as bottom blowing flow rate, slag layer and matte layer thickness, density and viscosity, the flow field conditions under three different movable baffle positions are calculated based on the fluid mechanics method; and the optimal movable baffle position is obtained and recorded based on the computational fluid dynamics simulation results and real-time pressure data;

[0155] Step S3: When the furnace is shut down, the lifting device is operated to be located at different gears, the movable baffle is moved and replaced to different slot positions, thereby isolating the stirring zone and the settling zone from each other, and adjusting the ranges of the two to complete the replacement of the movable baffle position.

[0156] Preferably, in step S1 of this embodiment, pressure sensors are arranged outside the furnace body in the stirring zone and the settling zone, so as to capture the asymmetric oscillation pressure data caused by the difference in stirring intensity in real time; and the data are quickly transmitted to the intelligent computing module, providing key input for flow field analysis and optimization of the movable baffle position; step S2 calculates the flow field based on the input initial data using fluid mechanics methods; combining the computational fluid dynamics simulation results and real-time pressure data, it is possible to comprehensively evaluate the influence of different movable baffle positions on the flow field and obtain the optimal movable baffle position; step S3 moves the movable baffle to different slot positions by operating the lifting device when the furnace is shut down, so as to achieve effective isolation of the stirring zone and the settling zone; the adjustment of the movable baffle position can flexibly respond to different smelting requirements and optimize the smelting process.

[0157] In summary, this embodiment realizes real-time monitoring of the dynamic behavior of the fluid in the furnace and improves the ability to perceive the fluid state; provides accurate data support for the intelligent computing module, which helps to achieve more accurate flow field simulation and optimization of the movable baffle position; through simulation and data analysis, an in-depth understanding of the fluid behavior is achieved, providing a scientific basis for optimizing the position of the movable baffle; determination of the optimal movable baffle position helps to improve smelting efficiency, reduce energy consumption, and also helps to improve the quality of smelting products; improves the flexibility and controllability of the smelting process, and helps to achieve more refined smelting operations; by optimizing the movable baffle position, the smelting efficiency and quality are further improved, and the production cost is reduced.

[0158] like Fig.10 As shown, this embodiment provides an embodiment of an electronic device. In this embodiment, the electronic device 16 includes a processor 161 and a memory 162 coupled to the processor 161 .

[0159] The memory 162 stores program instructions for implementing the control system of the bottom blowing furnace stirring zone-settling zone separation device of any of the above-mentioned embodiments.

[0160] The processor 161 is used to execute the program instructions stored in the memory 162 to implement the control system of the stirring zone-settling zone separation device of the bottom blowing furnace.

[0161] The processor 161 may also be referred to as a CPU (Central Processing Unit). The processor 161 may be an integrated circuit chip having signal processing capabilities. The processor 161 may also be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0162] Further, Fig.11 The schematic diagram of the structure of the storage medium of an embodiment of the present application is that the storage medium 17 of the embodiment of the present application stores program instructions 171 that can implement all the above methods, wherein the program instructions 171 can be stored in the above storage medium in the form of a software product, including several instructions for enabling a computer device (which can be a personal computer, server, or network device, etc.) or a processor to execute all or part of the steps of the methods described in each embodiment of the present application. The aforementioned storage medium includes: various media that can store program codes, such as a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk or an optical disk, or terminal devices such as a computer, a server, a mobile phone, and a tablet.

[0163] In the several embodiments provided by the present invention, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0164] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit may be implemented in the form of hardware or in the form of software functional units. The above is only an implementation mode of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the present invention specification and drawings, or directly or indirectly used in other related technical fields, is also included in the patent protection scope of the present invention.

[0165] The specific implementation methods of the invention are described in detail above, but they are only examples, and the invention is not limited to the specific implementation methods described above. For those skilled in the art, any equivalent modification or substitution of the invention is also within the scope of the invention, therefore, the equalization, modification, improvement, etc. made without departing from the spirit and principle of the invention should be included in the scope of the invention.

Claims

1. A bottom blowing furnace stirring zone-settling zone separation device, characterized in that: The bottom blowing furnace stirring zone-settling zone separation device is provided with a bottom blowing furnace; There is a gear set on each side of the bottom blowing furnace, a feed port and a flue are provided above the bottom blowing furnace, a burner is provided on the side close to the feed port and obliquely upwards; an auxiliary burner is provided on the upper side close to the flue and obliquely upwards, and a slag discharge port is provided below the auxiliary burner and obliquely downwards; the bottom of the bottom blowing furnace just below the feed port is a bottom blowing lance, and the bottom of the bottom blowing furnace just below the flue is a matte discharge port; a movable baffle is provided between the bottom blowing lance and the matte discharge port, which divides the bottom blowing furnace into a stirring zone and a static zone, the burner side is the stirring zone, and the auxiliary burner side is the static zone.

2. The bottom blowing furnace stirring zone-settling zone separation device according to claim 1 is characterized in that: The card slot structure comprises: One side of the upper part of the slot is provided with a groove for fixing the movable baffle; one side of the lower part of the slot is provided with a protruding table for supporting the movable baffle; the slot and the furnace body are stacked with magnesium-chromium refractory materials.

3. The bottom blowing furnace stirring zone-settling zone separation device according to claim 1 is characterized in that: The movable baffle is a trapezoidal structure with two lifting ears; it is made of magnesium-chromium refractory material.

4. The bottom blowing furnace stirring zone-settling zone separation device according to claim 1 is characterized in that: The movable baffle is fixed by a slot; the upper part of the movable baffle is connected to a lifting device by a wire rope, and the lifting device moves the movable baffle and replaces it to a different slot position, thereby isolating the stirring zone and the sedimentation zone from each other.

5. The bottom blowing furnace stirring zone-settling zone separation device according to claim 4 is characterized in that: The lifting device includes four parts: crane, square track, wire rope and hook; The track is designed to be square, so that the movable baffle lifted by the crane can only move between three groups of slots; three different gears are set for the movement of the lifting device on the slide rail, and the crane in different gears corresponds to the position directly above the three groups of different slots; three gears are set for the lifting height of the crane hook, one gear corresponds to the installation height of the movable baffle, one gear corresponds to the height at which the movable baffle can leave the slot and move laterally with the lifting device without contacting the top of the bottom blowing furnace, and the last one corresponds to the height when the wire rope is fully retracted by the crane.

6. A control system for a bottom blowing furnace stirring zone-settling zone separation device, which is applied to the bottom blowing furnace stirring zone-settling zone separation device as claimed in any one of claims 1 to 5, characterized in that: The control system of the bottom blowing furnace stirring zone-settling zone separation device includes: A lifting module is used to move the movable baffle and replace it to different slot positions, thereby isolating the stirring zone and the settling zone from each other and adjusting the range of the two; Bottom blowing furnace module, used to arrange movable baffles, card slots and pressure sensors; The data acquisition and feedback module is used to arrange pressure sensors outside the furnace body in the stirring zone and the settling zone to collect real-time pressure data of asymmetric oscillations caused by intense stirring on one side of the furnace body and relatively slow melt flow on the other side, and transmit it to the intelligent calculation module; The intelligent calculation module is used to calculate the flow field conditions under three different movable baffle positions based on the input bottom blowing flow rate, slag layer and matte layer thickness, density and viscosity initial data based on the fluid mechanics method; and to obtain and record the optimal movable baffle position based on the computational fluid dynamics simulation results and real-time pressure data; when the furnace is shut down, the lifting device is operated to be located in different gears to complete the replacement of the movable baffle position.

7. The control system of the bottom blowing furnace stirring zone-settling zone separation device according to claim 6, characterized in that: Intelligent computing module, including: The VOF model submodule is used to define the gas phase as the primary phase, the slag and matte phases as the secondary phases, calculate the volume fraction of the gas phase, and derive the continuity equation and momentum equation of the VOF model; The continuum surface tension model submodule is used to calculate the continuum surface tension model, calculate the subgrid scale stress of the LES model, and calculate the eddy viscosity of the melt using the wall-adaptive local eddy viscosity model; The three-phase flow prediction submodule predicts the gas-matte-slag three-phase flow conditions under different movable baffle positions based on the calculated continuity equation and momentum equation combined with the melt eddy viscosity.

8. The control system of the bottom blowing furnace stirring zone-settling zone separation device according to claim 7, characterized in that: VOF model submodules, including: The continuity equation unit is used to define the gas phase as the primary phase, and the slag and matte phases as the secondary phases, so the continuity equation of the VOF model is expressed as follows: Among them, α slag is the volume fraction of slag phase; α matte is the volume fraction of the matte phase; ρ slag is the slag phase density; ρ matte is the density of the matte phase; is the slag phase velocity vector; is the velocity vector of the matte phase; The gas phase volume fraction unit is used to calculate the gas phase volume fraction. The gas phase volume fraction is calculated by the following formula: α g +α matte +α slag ＝1 Among them, α g is the gas phase volume fraction; The momentum equation unit is used to calculate the velocity field shared by all phases. The momentum equation has the following form: in, is the acceleration due to gravity; is the velocity vector; μ and ρ are the mixed viscosity and mixed density in the unit cell, respectively, and have the following form: p=a slag r slag +a matte r matte +(1-a slag -a matte )r g μ = a slag m slag +a matte m matte +(1-a slag -a matt e)m g Among them, μ slag is the viscosity of the slag phase; μ matte is the viscosity of the sulfide phase; μ g is the gas phase viscosity.

9. The control system of the bottom blowing furnace stirring zone-settling zone separation device according to claim 7, characterized in that: Continuous surface tension model submodule, including: The surface tension model unit is used to introduce a continuous surface tension model, which has the following form: Where p2 and p1 are the pressures on both sides of the interface; σ is the surface tension coefficient; R1 and R2 are two radii in orthogonal directions used to measure curvature; The grid-scale stress unit is used to introduce the LES model and calculate the sub-grid-scale stress. The calculation formula is as follows: Among them, τ kk is the isotropic part of the subscale stress; μ t is the eddy viscosity; is the strain tensor, calculated by the following formula: The eddy viscosity model unit is used to introduce the wall adaptive local eddy viscosity model and calculate the eddy viscosity μ t The calculation formula is as follows: in, is the strain rate tensor at the analytical scale; is the traceless symmetric part of the square of the velocity gradient tensor; L s is the subscale mixing length, which is calculated by the following formula: L s =min(κd,C w V 1 / 3 ) Where d is the distance to the nearest wall; d is the calculation unit volume; κ is the von Karman constant; C w is the WALE constant.

10. A control method for a bottom blowing furnace stirring zone-settling zone separation device, which is applied to the bottom blowing furnace stirring zone-settling zone separation device according to any one of claims 1 to 5, characterized in that: The bottom blowing furnace stirring zone-settling zone separation device control method comprises: Pressure sensors are arranged outside the furnace in the stirring zone and the settling zone to collect real-time pressure data of asymmetric oscillation of melt flow on the other side due to intense stirring on one side of the furnace, and transmit it to the intelligent calculation module; According to the input bottom blowing flow rate, slag layer and matte layer thickness, density and viscosity initial data, the flow field conditions under three different movable baffle positions are calculated based on the fluid mechanics method; and the movable baffle position is obtained and recorded based on the computational fluid dynamics simulation results and real-time pressure data; When the furnace is shut down, the lifting device is operated to be located in different gears, the movable baffle is moved and replaced to different slot positions, thereby isolating the stirring zone and the sedimentation zone from each other, and adjusting the ranges of the two to complete the replacement of the movable baffle position.

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