Dead stock column state evaluation method and device, electronic equipment and storage medium

Abstract

The invention provides a dead stock column state evaluation method and device, electronic equipment and a storage medium, and the method comprises the steps: partitioning a dead stock column in the radius direction of a hearth based on a preset partition radius, and dividing the dead stock column into a stress concentration region, a loose region, a tuyere edge loose region and a tuyere lower region, the bottom boundary points of the stress concentration area and the loose area are used as first partition nodes, the bottom boundary points of the loose area and the tuyere edge loose area are used as second stock column partition nodes, the bottom boundary points of the tuyere edge loose area and the tuyere lower area are used as third partition nodes, and stress balance calculation is conducted on all the partitions; the height of each partition node is obtained, the bottom contour of the dead stock column is obtained based on the height of each partition node, the state of the dead stock column is evaluated according to the dead bottom contour, and the technical problem that the state of the dead stock column cannot be evaluated is solved through the method.

Description

Technical Field

[0001] The present application relates to the technical field of metallurgy, and particularly relates to a method, device, electronic device and storage medium for evaluating the state of a dead stock column. Background Art

[0002] As a crucial smelting device in the iron and steel industry, the operating efficiency and lifespan of a blast furnace directly affect the cost and quality of iron and steel production. During the smelting process of a blast furnace, the state of the dead stock column in the hearth is one of the key factors determining the lifespan of the hearth. The dead stock column refers to the uncompletely melted burden accumulated at the bottom of the hearth, and its floating height and distribution state directly affect the molten iron flow, heat conduction in the hearth, and the wear condition of the hearth lining.

[0003] During the blast furnace design and production operation process, it is crucial to maintain an appropriate floating height and bottom contour state of the dead stock column. Abnormalities in the floating height or bottom contour state of the dead stock column may affect the thermal efficiency of the hearth and the stability of the smelting process. Therefore, real-time monitoring and evaluation of the dead stock column state are of great significance for optimizing blast furnace operation and extending the lifespan of the hearth.

[0004] However, due to the complex and harsh internal environment of the blast furnace, with extreme conditions such as high temperature, high pressure, and high dust content, it is difficult for traditional measurement means to achieve the state evaluation of the dead stock column. This limitation makes it difficult to accurately grasp the actual state of the dead stock column during the blast furnace production process, resulting in the inability to take effective adjustment measures in a timely manner, increasing the risk of hearth damage, and affecting the long-term stable operation of the blast furnace. Summary of the Invention

[0005] In view of the above-mentioned drawbacks of the related technologies, the present application provides a method, device, electronic device and storage medium for evaluating the state of a dead stock column to solve the technical problem of being unable to evaluate the state of the dead stock column.

[0006] The present application provides a method for evaluating the state of a dead stock column, the method including: partitioning the dead stock column along the radial direction of the hearth based on a preset partition radius, and dividing the dead stock column into a stress concentration area, a loose area, a tuyere-edge loose area, and a below-tuyere area; taking the bottom boundary points of the stress concentration area and the loose area as the first partition nodes, taking the bottom boundary points of the loose area and the tuyere-edge loose area as the second partition nodes, and taking the bottom boundary points of the tuyere-edge loose area and the below-tuyere area as the third partition nodes; performing force balance calculations on the stress concentration area, the tuyere-edge loose area, and the below-tuyere area to respectively obtain the heights of the first partition node, the second partition node, and the third partition node; obtaining the bottom contour of the dead stock column based on the heights of the respective partition nodes, so as to evaluate the state of the dead stock column according to the bottom contour of the dead stock column.

[0007] In an embodiment of the present application, calculating the force balance of the stress concentration area to obtain the height of the first partition node includes: analyzing the forces acting on the stress concentration area to obtain that the forces acting on the stress concentration area include the effective pressure within the area, the gravity of the dead charge column within the area, the buoyancy of the iron slag, and the buoyancy of the hot metal. The effective pressure within the area is obtained based on the static pressure of the center line of the tuyere in the stress concentration area; if the first partition node is immersed in the iron slag layer and not immersed in the hot metal layer, a force balance equation is established according to the effective pressure within the area, the gravity of the dead charge column within the area, and the buoyancy of the iron slag to obtain the depth of the first partition node immersed in the iron slag layer; if the first partition node is immersed in the iron slag layer and immersed in the hot metal layer, a force balance equation is established according to the effective pressure within the area, the gravity of the dead charge column within the area, the buoyancy of the iron slag, and the buoyancy of the hot metal to obtain the depth of the first partition node immersed in the hot metal layer; obtaining the slag line elevation and the bottom elevation of the hearth of the blast furnace, and obtaining the height of the first partition node based on the slag line elevation, the bottom elevation of the hearth, and the depth of the first partition node immersed in the iron slag layer or the hot metal layer.

[0008] In an embodiment of the present application, calculating the force balance of the loose area at the tuyere edge to obtain the height of the second partition node includes: analyzing the forces acting on the loose area at the tuyere edge to obtain that the forces acting on the loose area at the tuyere edge include the effective pressure within the area, the gravity of the dead charge column within the area, the buoyancy of the iron slag, and the buoyancy of the hot metal. The effective pressure within the area is obtained based on the vertical stress of the loose area at the tuyere edge; if the second partition node is immersed in the iron slag layer and not immersed in the hot metal layer, a force balance equation is established according to the effective pressure within the area, the gravity of the dead charge column within the area, and the buoyancy of the iron slag to obtain the depth of the second partition node immersed in the iron slag layer; if the second partition node is immersed in the iron slag layer and immersed in the hot metal layer, a force balance equation is established according to the effective pressure within the area, the gravity of the dead charge column within the area, the buoyancy of the iron slag, and the buoyancy of the hot metal to obtain the depth of the second partition node immersed in the hot metal layer; obtaining the slag line elevation and the bottom elevation of the hearth of the blast furnace, and obtaining the height of the second partition node based on the slag line elevation, the bottom elevation of the hearth, and the depth of the second partition node immersed in the iron slag layer or the hot metal layer.

[0009] In an embodiment of the present application, calculating the force balance of the area below the tuyere to obtain the height of the nodes in the third partition includes: performing a force analysis on the area below the tuyere to obtain the forces acting on the area below the tuyere, including the gravity of the dead burden column in the area, the buoyancy of the iron slag, and the buoyancy of the hot metal; if the nodes in the third partition are immersed in the iron slag layer and not immersed in the hot metal layer, establishing a force balance equation based on the gravity of the dead burden column in the area and the buoyancy of the iron slag to obtain the depth of immersion of the nodes in the third partition in the iron slag layer; if the nodes in the third partition are immersed in the iron slag layer and immersed in the hot metal layer, establishing a force balance equation based on the gravity of the dead burden column in the area, the buoyancy of the iron slag, and the buoyancy of the hot metal to obtain the depth of immersion of the nodes in the third partition in the hot metal layer; obtaining the slag line elevation and the bottom elevation of the hearth of the blast furnace, and obtaining the height of the nodes in the third partition based on the slag line elevation, the bottom elevation of the hearth, and the depth of immersion of the nodes in the third partition in the iron slag layer or the hot metal layer.

[0010] In an embodiment of the present application, before performing the force balance calculation, it further includes: if the buoyancy of the iron slag in the stress concentration area or the loose area at the tuyere edge is greater than or equal to the sum of the effective pressure in the area and the gravity of the dead burden column in the area, the nodes in the first partition or the second partition are immersed in the iron slag layer and not immersed in the hot metal layer; if the buoyancy of the iron slag in the stress concentration area or the loose area at the tuyere edge is less than the sum of the effective pressure in the area and the gravity of the dead burden column in the area, the nodes in the first partition or the second partition are immersed in the iron slag layer and immersed in the hot metal layer.

[0011] In an embodiment of the present application, before performing the force balance calculation, it further includes: if the buoyancy of the iron slag in the area below the tuyere is greater than or equal to the gravity of the dead burden column in the area, the nodes in the third partition are immersed in the iron slag layer and not immersed in the hot metal layer; if the buoyancy of the iron slag in the area below the tuyere is less than the gravity of the dead burden column in the area, the nodes in the third partition are immersed in the iron slag layer and immersed in the hot metal layer.

[0012] In an embodiment of the present application, obtaining the bottom contour of the dead burden column based on the heights of the nodes in each partition to evaluate the state of the dead burden column according to the bottom contour of the dead burden column includes: judging the state of the dead burden column according to the bottom contour of the dead burden column, and the state of the dead burden column includes a sitting state and a floating state; if the state of the dead burden column is the sitting state, sending the evaluation result of the state of the dead burden column to the production supervision platform for alarm.

[0013] An embodiment of the present application further provides a dead stock column state evaluation device, which includes: a zoning planning module for zoning the dead stock column along the radial direction of the hearth based on a preset zoning radius, and dividing the dead stock column into a stress concentration area, a loose area, a tuyere edge loose area, and an area below the tuyere; a node planning module for using the bottom boundary points of the stress concentration area and the loose area as the first zoning nodes, using the bottom boundary points of the loose area and the tuyere edge loose area as the second zoning nodes, and using the bottom boundary points of the tuyere edge loose area and the area below the tuyere as the third zoning nodes; a height calculation module for performing force balance calculations on the stress concentration area, the tuyere edge loose area, and the area below the tuyere to obtain the heights of the first zoning node, the second zoning node, and the third zoning node respectively; and a state evaluation module for obtaining the bottom contour of the dead stock column based on the heights of the respective zoning nodes, so as to evaluate the state of the dead stock column according to the bottom contour of the dead stock column.

[0014] An embodiment of the present application further provides an electronic device, which includes: one or more processors; a storage device for storing one or more programs, and when the one or more programs are executed by the one or more processors, the electronic device implements the dead stock column state evaluation method as described in any one of the above embodiments.

[0015] An embodiment of the present application further provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor of a computer, the computer is made to execute the dead stock column state evaluation method as described in any one of the above embodiments.

[0016] Advantages of the present application: The embodiments of the present application provide a dead stock column state evaluation method, device, electronic device, and storage medium. By zoning the dead stock column along the radial direction of the hearth based on a preset zoning radius, the dead stock column is divided into a stress concentration area, a loose area, a tuyere edge loose area, and an area below the tuyere. The boundary points of the stress concentration area and the loose area are used as the first zoning nodes, the boundary points of the loose area and the tuyere edge loose area are used as the second zoning nodes, and the boundary points of the tuyere edge loose area and the area below the tuyere are used as the third zoning nodes. Force balance calculations are performed on each zone to obtain the heights of each zoning node. The bottom contour of the dead stock column is obtained based on the heights of each zoning node, so as to evaluate the state of the dead stock column according to the bottom contour of the dead stock column. Through this method, the system calculation efficiency is improved, and the stored data of the bottom contour of the dead stock column is simple, and the state of the dead stock column in the hearth can be intuitively presented to the operator in a timely manner, providing a reference for the production analysis and operation of the blast furnace.

[0017] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present application. Description of the Drawings

[0018] Figure 1 It is a schematic diagram of partition of a method for evaluating the state of a dead stock column shown in an exemplary embodiment of the present application;

[0019] Figure 2 It is a flowchart of a method for evaluating the state of a dead stock column shown in an exemplary embodiment of the present application;

[0020] Figure 3 It is a flowchart of evaluating the state of a dead stock column shown in an exemplary embodiment of the present application;

[0021] Figure 4 It is a block diagram of a device for evaluating the state of a dead stock column shown in an exemplary embodiment of the present application;

[0022] Figure 5 It is a schematic structural diagram of an electronic device shown in an exemplary embodiment of the present application. Detailed Embodiments

[0023] The following uses specific specific examples to illustrate the implementation manners of the present application. Those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0024] It should be noted that the drawings provided in the following embodiments only illustrate the basic concept of the present application schematically. Therefore, only the components related to the present application are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, number, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0025] It should be noted that in the present application, "first", "second", etc. are only used to distinguish similar objects, and are not used to limit the order or sequence of similar objects. The described "including", "having", etc. are deformed, indicating that the scope covered by the subject of the word does not exclude other examples except the examples shown by the word.

[0026] It can be understood that the various numerical numbers, step numbers, etc. recorded in the present application are for the convenience of description and are not used to limit the scope of the present application. The size of the reference numbers in the present application does not mean the sequence of execution order. The execution order of each process should be determined by its function and internal logic.

[0027] In the following description, a large number of details are explored to provide a more thorough explanation of the embodiments of the present application. However, it is obvious to those skilled in the art that the embodiments of the present application can be implemented without these specific details. In other embodiments, well-known structures and devices are shown in the form of block diagrams rather than in detail to avoid making the embodiments of the present application difficult to understand.

[0028] Embodiments of the present application respectively propose a method for evaluating the state of a dead stock column, a device for evaluating the state of a dead stock column, an electronic device, a computer-readable storage medium, and a computer program product. These embodiments will be described in detail below.

[0029] Please refer to Figure 1 , Figure 1 which is a schematic diagram of the partition of a method for evaluating the state of a dead stock column shown in an exemplary embodiment of the present application.

[0030] As Figure 1 shown, the dead stock column in the hearth can be divided into a stress concentration area, a loose area, a loose area at the tuyere edge, and an area below the tuyere. Taking the node at the center line position of the blast furnace as node 1, the intersection position of the bottom of the stress concentration area and the loose area as node 2, the intersection position of the bottom of the loose area and the loose area at the tuyere edge as node 3, the position directly below the tuyere as node 4, and the intersection position of the bottom of the area below the tuyere and the edge of the hearth as node 5. In the embodiments of the present application, node 2 is used as the first partition node, node 3 is used as the second partition node, and node 4 is used as the third partition node.

[0031] Please refer to Figure 2 , Figure 2 which is a flowchart of a method for evaluating the state of a dead stock column shown in an exemplary embodiment of the present application.

[0032] As Figure 2 shown, in an exemplary embodiment, the method for evaluating the state of a dead stock column at least includes steps S210 to S240, which are introduced in detail as follows:

[0033] Step S210: Partition the dead stock column along the radial direction of the hearth based on a preset partition radius, and divide the dead stock column into a stress concentration area, a loose area, a loose area at the tuyere edge, and an area below the tuyere.

[0034] Exemplarily, the dead stock column in the hearth below the tuyere center line is partitioned along the radial direction, and the partition nodes are numbered and the radius values are recorded. From the center of the hearth to the edge of the hearth along the radial direction, they are successively the stress concentration area, the loose area, the loose area at the tuyere edge, and the area below the tuyere. Among them, the stress concentration area is columnar, and the loose area at the tuyere edge is annular. Their ranges are related to the distribution of the burden layer in the hearth at the tuyere center line position; the width of the area below the tuyere is annular, and the width is the same as the tuyere depth;

[0035] Exemplarily, each partition boundary position is a partition node, and the partition nodes are numbered in a certain order, while recording the radius information of each partition node.

[0036] In step S220, the bottom boundary points of the stress concentration area and the loose area are used as the first partition nodes, the bottom boundary points of the loose area and the loose area at the tuyere edge are used as the second partition nodes, and the bottom boundary points of the loose area at the tuyere edge and the area below the tuyere are used as the third partition nodes.

[0037] Exemplarily, according to the stress distribution at the tuyere centerline position, the radius of the stress concentration area is 1 / 3 of the hearth radius, the width of the area below the tuyere is 2.22 m, and the loose area at the tuyere edge is 0.25 m away from the tuyere edge. The dead stock column is symmetrically distributed along the blast furnace centerline. Therefore, the partition nodes are only set on one side of the blast furnace centerline, and the node at the blast furnace centerline position is the No. 1 node, the bottom boundary position between the stress concentration area and the loose area is the No. 2 node, the bottom boundary position between the loose area and the loose area at the tuyere edge is the No. 3 node, the position directly below the tuyere is the No. 4 node, and the boundary position between the area below the tuyere and the hearth edge is the No. 5 node. In an embodiment of the present application, the No. 2 node is used as the first partition node, the No. 3 node is used as the second partition node, and the No. 4 node is used as the third partition node.

[0038] In step S230, force balance calculations are performed on the stress concentration area, the loose area at the tuyere edge, and the area below the tuyere to obtain the heights of the first partition node, the second partition node, and the third partition node, respectively.

[0039] In an embodiment of the present application, performing a force balance calculation on the stress concentration area to obtain the height of the first partition node includes: performing a force analysis on the stress concentration area to obtain that the forces on the stress concentration area include the effective pressure within the area, the gravity of the dead stock column within the area, the buoyancy of iron slag, and the buoyancy of hot metal. The effective pressure within the area is obtained based on the static pressure at the tuyere centerline of the stress concentration area; if the first partition node is immersed in the iron slag layer and not immersed in the hot metal layer, a force balance equation is established according to the effective pressure within the area, the gravity of the dead stock column within the area, and the buoyancy of iron slag to obtain the immersion depth of the first partition node in the iron slag layer; if the first partition node is immersed in the iron slag layer and immersed in the hot metal layer, a force balance equation is established according to the effective pressure within the area, the gravity of the dead stock column within the area, the buoyancy of iron slag, and the buoyancy of hot metal to obtain the immersion depth of the first partition node in the hot metal layer; obtaining the slag line elevation and the hearth bottom elevation of the blast furnace, and obtaining the height of the first partition node based on the slag line elevation, the hearth bottom elevation, and the immersion depth of the first partition node in the iron slag layer or the immersion depth in the hot metal layer.

[0040] Exemplarily, the calculation method for the effective pressure within the stress concentration area includes: first calculating the static pressure at the tuyere centerline position of the stress concentration area:

[0041] Ph = [ρ 平均，块 ·(H 首料 - H 软 ) + ρ c滴 ·(H 软 - H 风口 )]·g Equation (1)

[0042]

[0043] In Equations (1) and (2), P h represents the hydrostatic pressure at the centerline of the tuyere in the stress concentration area, ρ 平均,块 represents the average bulk density in the burden zone, H 首料 represents the elevation of the first layer of burden surface, H 软 represents the elevation of the cohesive zone, ρ c滴 represents the coke bulk density in the raceway zone, H 风口 represents the elevation of the tuyere centerline, g represents the acceleration due to gravity, O / C represents the weight ratio of ore to coke, ρ c0 represents the coke bulk density in the burden zone, ρ O0 represents the ore bulk density.

[0044] Among them, the average bulk density in the burden zone, the elevation of the first layer of burden surface, the elevation of the cohesive zone, the coke bulk density in the raceway zone, the elevation of the tuyere centerline, the acceleration due to gravity, the weight ratio of ore to coke, the coke bulk density in the burden zone, and the ore bulk density are relevant BF parameters obtained, which can be obtained by sensors in the blast furnace or preset in advance based on conventional data.

[0045] Exemplarily, the effective pressure in the stress concentration area is twice the hydrostatic pressure at the centerline of the tuyere in the stress concentration area. However, due to the existence of gas buoyancy, the influence of buoyancy needs to be deducted from the effective pressure. Therefore, the effective pressure in the stress concentration area is calculated as follows:

[0046] P * = 2P h · - P f Equation (3)

[0047]

[0048] In Equations (3) and (4), P * represents the effective pressure in the stress concentration area, P h represents the hydrostatic pressure at the centerline of the tuyere in the stress concentration area, P f represents the vertical stress reduced due to gas buoyancy, P bl represents the blast pressure, p top represents the top pressure, ρ g represents the hot air density, v trepresents the tuyere air velocity, and ξ represents the tuyere blowing loss coefficient, which can be taken as 1.1.

[0049] Among them, the vertical stress reduced due to the buoyancy of the gas, the blowing pressure, the top pressure of the furnace, the hot air density, the tuyere air velocity, and the tuyere blowing loss coefficient are relevant parameters of the blast furnace obtained, which can be obtained through sensors in the blast furnace or preset in advance based on conventional data.

[0050] In an embodiment of the present application, according to the force balance calculation, the calculation formulas for the floating height of the dead stock column under the conditions of the dead stock column immersed in the slag-iron layer and the molten iron layer can be obtained respectively. That is, the height of the first partition node is calculated as follows:

[0051] When immersed in the slag layer but not in the molten iron layer:

[0052] h = H 渣 -H 炉底 -Δh Equation (5)

[0053]

[0054] When immersed in the molten iron:

[0055] h = H 铁水 -H 炉底 -Δh Equation (7)

[0056]

[0057] In Equations (5), (6), (7), and (8), h represents the floating height of the dead stock column (the height of the first partition node in this embodiment), and H 渣 represents the slag line elevation, H 炉底 represents the bottom elevation of the hearth, Δh represents the depth of the dead stock column immersed in the molten iron layer or the slag-iron layer, P * represents the effective pressure within the area of the stress concentration zone, ρ c represents the coke density, H 风口 represents the elevation of the tuyere center line, H 铁水 represents the elevation of the molten iron, ρ 渣 represents the slag-iron density, ε represents the porosity of the dead stock column, ρ 铁水 represents the molten iron density.

[0058] Among them, the slag line elevation, the bottom elevation of the hearth, ρ c represents the coke density, the elevation of the tuyere center line, the elevation of the molten iron, the slag-iron density, the porosity of the dead stock column, and the molten iron density are relevant parameters of the blast furnace obtained, which can be obtained through sensors in the blast furnace or preset in advance based on conventional data, and can be obtained through relevant sensors in the blast furnace or preset in advance based on conventional data.

[0059] In an embodiment of the present application, the height of the second partition node is obtained by performing a force balance calculation on the loose area at the tuyere edge, including: analyzing the forces on the loose area at the tuyere edge, and obtaining that the forces on the loose area at the tuyere edge include the effective pressure within the area, the gravity of the dead burden column within the area, the buoyancy of the iron slag, and the buoyancy of the molten iron. The effective pressure within the area is obtained based on the vertical stress in the loose area at the tuyere edge; if the second partition node is immersed in the iron slag layer and not immersed in the molten iron layer, a force balance equation is established according to the effective pressure within the area, the gravity of the dead burden column within the area, and the buoyancy of the iron slag to obtain the depth of immersion of the second partition node in the iron slag layer; if the second partition node is immersed in the iron slag layer and immersed in the molten iron layer, a force balance equation is established according to the effective pressure within the area, the gravity of the dead burden column within the area, the buoyancy of the iron slag, and the buoyancy of the molten iron to obtain the depth of immersion of the second partition node in the molten iron layer; obtain the slag line elevation and the hearth bottom elevation of the blast furnace, and obtain the height of the second partition node based on the slag line elevation, the hearth bottom elevation, and the depth of immersion of the second partition node in the iron slag layer or the molten iron layer.

[0060] Exemplarily, the effective pressure within the area of the loose area at the tuyere edge is obtained by subtracting the gas buoyancy from the vertical stress. The vertical stress is calculated using the Janssen formula, and the specific calculation is as follows:

[0061]

[0062] P 风 * =P - P f Equation (11)

[0063]

[0064] In equations (9), (10), (11), and (12), P represents the vertical stress in the loose area at the tuyere edge, ρ 平均，炉料 represents the average density of the burden, D represents the hearth diameter, μ represents the friction coefficient between the powder and the inner wall of the cylinder, which can be taken as 0.364, H 首料 represents the elevation of the first layer of burden surface, H 风口 represents the elevation of the tuyere center line, ρ 平均，块 represents the average bulk density in the lumpy zone, H 软 represents the elevation of the softening-melting zone, ρ c滴 represents the coke bulk density in the dripping zone, P 风 * represents the effective pressure within the area of the loose area at the tuyere edge, P f represents the vertical stress reduced due to the gas buoyancy.

[0065] Among them, the blast furnace hearth diameter, the friction coefficient between the powder and the inner wall of the cylinder, the elevation of the first layer of burden surface, the elevation of the tuyere center line, the average bulk density of the lump zone, the elevation of the cohesive zone, the coke bulk density in the dropping zone, and the vertical stress reduced by the buoyancy of the gas are the blast furnace related parameters obtained, which can be obtained through sensors in the blast furnace or preset in advance based on conventional data.

[0066] Exemplarily, after calculating the effective pressure in the area of the loose zone at the tuyere edge, it is possible to judge whether the nodes in the second partition are immersed in the molten iron layer, and then calculate the floating height of the dead burden column with reference to Equations (5)-(8), so as to obtain the height of the nodes in the second partition.

[0067] In an embodiment of the present application, calculating the force balance of the area below the tuyere to obtain the height of the nodes in the third partition includes: analyzing the forces acting on the area below the tuyere, and obtaining that the forces acting on the area below the tuyere include the gravity of the dead burden column in the area, the buoyancy of the iron slag, and the buoyancy of the molten iron; if the nodes in the third partition are immersed in the iron slag layer and not immersed in the molten iron layer, then establish a force balance equation based on the gravity of the dead burden column in the area and the buoyancy of the iron slag to obtain the depth of immersion of the nodes in the third partition in the iron slag layer; if the nodes in the third partition are immersed in the iron slag layer and immersed in the molten iron layer, then establish a force balance equation based on the gravity of the dead burden column in the area, the buoyancy of the iron slag, and the buoyancy of the molten iron to obtain the depth of immersion of the nodes in the third partition in the molten iron layer; obtain the slag line elevation and the hearth bottom elevation of the blast furnace, and obtain the height of the nodes in the third partition based on the slag line elevation, the hearth bottom elevation, and the depth of immersion of the nodes in the third partition in the iron slag layer or the molten iron layer.

[0068] Exemplarily, the height calculation of the nodes in the third partition is as follows:

[0069] When immersed in the iron slag layer and not immersed in the molten iron layer:

[0070] h = H 渣 -H 炉底 -Δh Equation (13)

[0071]

[0072] When immersed in the molten iron:

[0073] h = H 铁水 -H 炉底 -Δh Equation (15)

[0074]

[0075] In Equations (13), (14), (15) and (16), h represents the floating height of the dead burden column (the height of the nodes in the third partition in this embodiment), H 渣 represents the slag line elevation, H 炉底 represents the hearth bottom elevation, Δh represents the depth of immersion of the dead burden column in the molten iron layer or the iron slag layer, ρ cDenote the coke density as H 风口 Denote the elevation of the tuyere center line as H 铁水 Denote the elevation of the molten iron as ρ 渣 Denote the density of iron slag as ρ 铁水 Denote the density of molten iron.

[0076] Among them, the slag line elevation, the bottom elevation of the hearth, the coke density, the elevation of the tuyere center line, the elevation of the molten iron, the density of iron slag, and the density of molten iron are blast furnace related parameters obtained, which can be obtained through sensors in the blast furnace or preset in advance based on conventional data.

[0077] In an embodiment of the present application, before performing the stress balance calculation, it further includes: if the buoyancy of the iron slag in the stress concentration area or the loose area at the tuyere edge is greater than or equal to the sum of the effective pressure in the area and the gravity of the dead burden in the area, the first partition node or the second partition node is immersed in the iron slag layer and not immersed in the molten iron layer; if the buoyancy of the iron slag in the stress concentration area or the loose area at the tuyere edge is less than the sum of the effective pressure in the area and the gravity of the dead burden in the area, the first partition node or the second partition node is immersed in the iron slag layer and immersed in the molten iron layer.

[0078] Exemplarily, to determine whether the first partition node or the second partition node is immersed in the slag layer or the molten iron layer, it is mainly determined by comparing the sum of the effective pressure in the area and the gravity of the dead burden immersed in the slag layer with the buoyancy of the slag. The determination conditions are as follows:

[0079] Condition for immersion in the slag layer and not in the molten iron layer:

[0080] ρ 渣 g·(H 渣 -H 铁水 )·(1 - ε) ≥ P * +ρ c g·(H 风口 -H 铁水 )·(1 - ε) Equation (17)

[0081] Condition for immersion in the molten iron:

[0082] ρ 渣 g·(H 渣 -H 铁水 )·(1 - ε) < P * +ρ c g·(H 风口 -H 铁水 )·(1 - ε) Equation (18)

[0083] In Equations (17) and (18), ρ 渣 denotes the density of iron slag, H 渣 denotes the slag line elevation, H 铁水 denotes the elevation of the molten iron, ε denotes the porosity of the dead burden, P *Represents the effective pressure within the region, ρ c Represents the coke density, H 风口 Represents the elevation of the tuyere center line.

[0084] In an embodiment of the present application, before performing the force balance calculation, it further includes: if the buoyancy of the iron slag in the area below the tuyere is greater than or equal to the gravity of the dead burden in the region, the nodes in the third partition are immersed in the iron slag layer and not in the molten iron layer; if the buoyancy of the iron slag in the area below the tuyere is less than the gravity of the dead burden in the region, the nodes in the third partition are immersed in the iron slag layer and in the molten iron layer.

[0085] Exemplarily, since the nodes in the third partition are in the area below the tuyere and an empty area is formed in the tuyere region, it can be considered that the dead burden below the tuyere is not under the pressure of the upper burden, and its floating and sinking state depends on the resultant force of its own gravity and the buoyancy of the slag and iron.

[0086] Therefore, the judgment of whether the nodes in the third partition are immersed in the slag layer or the molten iron can be simplified into the following form.

[0087] When immersed in the slag layer and not in the molten iron layer:

[0088] (ρ 渣 -ρ c )(H 渣 -H 铁水 )≥ρ c ·(H 风口 -H 渣 ) Equation (19)

[0089] When immersed in the molten iron:

[0090] (ρ 渣 -ρ c )·(H 渣 -H 铁水 )<ρ c ·(H 风口 -H 渣 ) Equation (20)

[0091] In Equations (19) and (20), ρ c represents the coke density, ρ 渣 represents the iron slag density, H 铁水 represents the molten iron elevation, H 渣 represents the slag line elevation, H 风口 represents the elevation of the tuyere center line.

[0092] Step S240, obtaining the bottom contour of the dead burden based on the heights of the nodes in each partition, so as to evaluate the state of the dead burden according to the bottom contour of the dead burden.

[0093] Exemplarily, the partition nodes are connected in a certain order to obtain the bottom contour of the dead stock column in the hearth, and the obtained curve is used as the bottom contour of the dead stock column in the hearth.

[0094] In an embodiment of the present application, the bottom contour of the dead stock column is obtained based on the heights of the respective partition nodes, and the evaluation of the state of the dead stock column according to the bottom contour of the dead stock column includes: judging the state of the dead stock column according to the bottom contour of the dead stock column, and the state of the dead stock column includes a sitting state and a floating state; sending the evaluation result of the state of the dead stock column to the production supervision platform so that the production supervision platform can optimize the operation parameters as needed. According to the preset warning conditions, a prompt warning is given to the state of the dead stock column. Assuming that a warning is required when the state of the dead stock column is sitting, then when the state of the dead stock column is sitting, a warning signal is triggered and sent to the production supervision platform, and the production supervision platform can adjust the parameters according to the production requirements until the warning is lifted.

[0095] Please refer to Figure 3 , Figure 3 FIG. is a flowchart of the evaluation of the state of the dead stock column shown in an exemplary embodiment of the present application. The flowchart of the evaluation of the state of the dead stock column includes: obtaining the real-time material parameters, operation parameters and geometric parameters of the blast furnace, where the material parameters at least include the ore bulk density, the coke bulk density in the lump zone, the coke bulk density in the dripping zone, the coke density, the porosity of the dead stock column, the molten iron density, the slag density, the hot blast density, the operation parameters at least include the top pressure of the furnace, the hot blast pressure, the average wind speed at the tuyere, the elevation of the first layer of the burden surface, the elevation of the softening-melting zone, the ore-coke ratio, the elevation of the iron line, the elevation of the slag line, the depth of the tuyere raceway, and the set parameters at least include the hearth diameter, the elevation of the tuyere center line, the elevation of the taphole center line, the elevation of the hearth bottom. The hearth below the tuyere center line of the blast furnace is partitioned, and at the same time, the partition nodes are numbered and recorded, the force analysis and force balance calculation are carried out for each partition, the floating height of each partition node is obtained, the bottom contour of the dead stock column is obtained based on the floating height of each partition node, and the bottom contour information of the dead stock column is stored.

[0096] Exemplarily, after storing the bottom contour information of the dead stock column, it further includes visualizing the bottom contour of the dead stock column, including presetting the basic contour picture of the hearth in the system, and then calling the calculated radius and floating height of each partition node stored, connecting them in a certain order to form the bottom contour of the dead stock column, and finally displaying it in the form of a picture on the application interface.

[0097] Please refer to Figure 4 , Figure 4 FIG. is a block diagram of a device for evaluating the state of the dead stock column shown in an exemplary embodiment of the present application.

[0098] As Figure 4 shown, the exemplary device for evaluating the state of the dead stock column includes:

[0099] The partition planning module 401 is configured to partition the dead burden column along the radial direction of the hearth based on a preset partition radius, and divide the dead burden column into a stress concentration area, a loose area, a tuyere edge loose area, and a below-tuyere area;

[0100] The node planning module 402 is configured to use the bottom boundary points of the stress concentration area and the loose area as the first partition nodes, the bottom boundary points of the loose area and the tuyere edge loose area as the second partition nodes, and the bottom boundary points of the tuyere edge loose area and the below-tuyere area as the third partition nodes;

[0101] The height calculation module 403 is configured to perform force balance calculations on the stress concentration area, the tuyere edge loose area, and the below-tuyere area to obtain the heights of the first partition node, the second partition node, and the third partition node respectively;

[0102] The state evaluation module 404 is configured to obtain the bottom contour of the dead burden column based on the heights of the respective partition nodes, so as to evaluate the state of the dead burden column according to the bottom contour of the dead burden column.

[0103] Figure 5 The structure diagram of a computer system of an electronic device suitable for implementing the embodiments of the present application is shown. It should be noted that, Figure 5 The computer system 500 of the shown electronic device is only an example, and should not impose any limitations on the functions and usage scope of the embodiments of the present application.

[0104] As Figure 5 shown, the computer system 500 includes a central processing unit (CPU) 501, which can perform various appropriate actions and processes according to the program stored in the read-only memory (ROM) 502 or the program loaded from the storage section 508 into the random access memory (RAM) 503, such as executing the method described in the above embodiments. In the RAM 503, various programs and data required for system operation are also stored. The CPU 501, the ROM 502, and the RAM 503 are connected to each other through a bus 504. The input / output (I / O) interface 505 is also connected to the bus 504.

[0105] The following components are connected to the I / O interface 505: an input section 506 including a keyboard, a mouse, etc.; an output section 507 including a cathode ray tube (CRT), a liquid crystal display (LCD), etc. and a speaker, etc.; a storage section 508 including a hard disk, etc.; and a communication section 509 including a network interface card such as a LAN (Local Area Network) card, a modem, etc. The communication section 509 performs communication processing via a network such as the Internet. A drive 510 is also connected to the I / O interface 505 as required. A removable medium 511 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory, etc. is mounted on the drive 510 as required so that a computer program read from the same is installed into the storage section 508 as required.

[0106] Specifically, according to an embodiment of the present application, the processes described above with reference to the flowchart can be implemented as a computer software program. For example, an embodiment of the present application includes a computer program product including a computer program carried on a computer-readable medium, the computer program including a computer program for performing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network via the communication section 509, and / or installed from the removable medium 511. When the computer program is executed by a central processing unit (CPU) 501, various functions defined in the system of the present application are executed.

[0107] It should be noted that the computer-readable medium shown in the embodiments of the present application may be a computer-readable signal medium, a computer-readable storage medium, or any combination of the two. A computer-readable storage medium may be, for example, an electrical, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination of the above. More specific examples of the computer-readable storage medium may include, but are not limited to: an electrical connection having one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM), a flash memory, an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable signal medium may include a data signal propagated in a baseband or as a part of a carrier wave, in which a computer-readable computer program is carried. Such a propagated data signal may take various forms, including but not limited to electromagnetic signals, optical signals, or any suitable combination of the above. A computer-readable signal medium may also be any computer-readable medium other than a computer-readable storage medium, which can send, propagate, or transmit a program for use by or in connection with an instruction execution system, apparatus, or device. The computer program included on the computer-readable medium may be transmitted by any appropriate medium, including but not limited to: wireless, wired, etc., or any suitable combination of the above.

[0108] The flowcharts and block diagrams in the accompanying drawings illustrate the possible architectures, functions, and operations of systems, methods, and computer program products according to various embodiments of the present application. Among them, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code, and the above module, program segment, or part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the blocks may occur in a different order than marked in the accompanying drawings. For example, two consecutive blocks shown may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram or flowchart, and the combination of blocks in the block diagram or flowchart, may be implemented by a dedicated hardware-based system for performing the specified functions or operations, or may be implemented by a combination of dedicated hardware and computer instructions.

[0109] The units involved in the embodiments described in this application can be implemented in software or in hardware, and the described units can also be provided in a processor. Among them, the names of these units do not, in some cases, constitute a limitation on the units themselves.

[0110] Another aspect of this application also provides a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor of a computer, the computer is caused to execute the dead stock column state evaluation method as described above. The computer-readable storage medium may be included in the electronic device described in the above embodiments, or may exist separately without being assembled into the electronic device.

[0111] Another aspect of this application also provides a computer program product or a computer program. The computer program product or the computer program includes computer instructions, and the computer instructions are stored in a computer-readable storage medium. A processor of a computer device reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the computer device executes the dead stock column state evaluation method provided in the above various embodiments.

[0112] The above embodiments are only used to exemplarily illustrate the principles and effects of this application, rather than to limit this application. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of this application. Therefore, all equivalent modifications or changes completed by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in this application should still be covered by the claims of this application.

Claims

1. A method for evaluating the state of a dead material column, characterized in that: The dead material column state assessment method comprises: Partitioning the dead material column along the radius direction of the furnace based on a preset partition radius, and dividing the dead material column into a stress concentration area, a loose area, a loose area at the edge of the tuyere, and an area below the tuyere; The bottom boundary point between the stress concentration zone and the loose zone is used as the first partition node, the bottom boundary point between the loose zone and the loose zone at the edge of the tuyere is used as the second partition node, and the bottom boundary point between the loose zone at the edge of the tuyere and the zone below the tuyere is used as the third partition node; Perform force balance calculation on the stress concentration area, the loose area at the edge of the tuyere and the area below the tuyere to obtain the heights of the first partition node, the second partition node and the third partition node respectively; The bottom contour of the dead material column is obtained based on the height of each partition node, so as to evaluate the state of the dead material column according to the bottom contour of the dead material column.

2. The dead material column state assessment method according to claim 1, characterized in that: Performing force balance calculation on the stress concentration area to obtain the height of the first partition node includes: Performing a force analysis on the stress concentration area, obtaining that the stress concentration area includes the effective pressure in the area, the gravity of the dead material column in the area, the buoyancy of the iron slag and the buoyancy of the molten iron, and the effective pressure in the area is obtained based on the static pressure of the center line of the tuyere in the stress concentration area; If the first partition node is immersed in the iron slag layer but not in the molten iron layer, a force balance equation is established according to the effective pressure in the area, the gravity of the dead material column in the area and the buoyancy of the iron slag to obtain the depth of the first partition node immersed in the iron slag layer; If the first partition node is immersed in the iron slag layer and the molten iron layer, a force balance equation is established according to the effective pressure in the area, the gravity of the dead material column in the area, the buoyancy of the iron slag and the buoyancy of the molten iron to obtain the depth of the first partition node immersed in the molten iron layer; The slag line elevation and the hearth bottom elevation of the blast furnace are obtained, and the height of the first partition node is obtained based on the slag line elevation, the hearth bottom elevation and the depth of the first partition node immersed in the slag layer or the molten iron layer.

3. The dead material column state assessment method according to claim 1, characterized in that: The force balance calculation is performed on the loose area at the edge of the tuyere to obtain the height of the second partition node, which includes: Performing a stress analysis on the loose area at the edge of the tuyere, the stress on the loose area at the edge of the tuyere includes the effective pressure in the area, the gravity of the dead material column in the area, the buoyancy of the iron slag and the buoyancy of the molten iron, and the effective pressure in the area is obtained based on the vertical stress of the loose area at the edge of the tuyere; If the second partition node is immersed in the iron slag layer but not in the molten iron layer, a force balance equation is established according to the effective pressure in the area, the gravity of the dead material column in the area and the buoyancy of the iron slag to obtain the depth of the second partition node immersed in the iron slag layer; If the second partition node is immersed in the iron slag layer and the molten iron layer, a force balance equation is established according to the effective pressure in the area, the gravity of the dead material column in the area, the buoyancy of the iron slag and the buoyancy of the molten iron to obtain the depth of the second partition node immersed in the molten iron layer; The slag line elevation and the hearth bottom elevation of the blast furnace are obtained, and the height of the second partition node is obtained based on the slag line elevation, the hearth bottom elevation and the depth of the second partition node immersed in the slag layer or the molten iron layer.

4. The dead material column state assessment method according to claim 1, characterized in that: The force balance calculation is performed on the area below the tuyere to obtain the height of the third partition node, which includes: Performing force analysis on the area below the tuyere, it is found that the force on the area below the tuyere includes the gravity of the dead material column in the area, the buoyancy of the iron slag and the buoyancy of the molten iron; If the third partition node is immersed in the iron slag layer but not in the molten iron layer, a force balance equation is established according to the gravity of the dead material column in the area and the buoyancy of the iron slag to obtain the depth of the third partition node immersed in the iron slag layer; If the third partition node is immersed in the iron slag layer and the molten iron layer, a force balance equation is established according to the gravity of the dead material column in the area, the buoyancy of the iron slag and the buoyancy of the molten iron to obtain the depth of the third partition node immersed in the molten iron layer; The slag line elevation and the hearth bottom elevation of the blast furnace are obtained, and the height of the third partition node is obtained based on the slag line elevation, the hearth bottom elevation and the depth of the third partition node immersed in the slag layer or the molten iron layer.

5. The dead material column state assessment method according to any one of claims 2 or 3, characterized in that: Before the force balance calculation, it also includes: If the buoyancy of the iron slag in the stress concentration area or the loose area at the edge of the tuyere is greater than or equal to the sum of the effective pressure in the area and the gravity of the dead material column in the area, the first partition node or the second partition node is immersed in the iron slag layer but not in the molten iron layer; If the buoyancy of the slag in the stress concentration area or the loose area at the edge of the tuyere is less than the sum of the effective pressure in the area and the gravity of the dead material column in the area, the first partition node or the second partition node is immersed in the slag layer and the molten iron layer.

6. The dead material column state assessment method according to claim 4, characterized in that: Before the force balance calculation, it also includes: If the buoyancy of the iron slag in the area below the tuyere is greater than or equal to the gravity of the dead material column in the area, the third subarea node is immersed in the iron slag layer but not in the molten iron layer; If the buoyancy of the iron slag in the area below the tuyere is less than the gravity of the dead material column in the area, the third partition node is immersed in the iron slag layer and the molten iron layer.

7. The dead material column state assessment method according to claim 1, characterized in that: Obtaining the bottom contour of the dead material column based on the height of each partition node, and evaluating the state of the dead material column according to the bottom contour of the dead material column includes: Determine the state of the dead material column according to the bottom contour of the dead material column, wherein the state of the dead material column includes a sinking state and a floating state; If the dead material column state is the sitting state, the evaluation result of the dead material column state is sent to the production supervision platform for alarm.

8. A dead material column status assessment device, characterized in that: The dead material column state assessment device comprises: A partition planning module is used to partition the dead material column along the radius direction of the furnace based on a preset partition radius, and divide the dead material column into a stress concentration area, a loose area, a loose area at the edge of the tuyere, and an area below the tuyere; A node planning module, used to use the bottom boundary points of the stress concentration zone and the loose zone as the first partition node, the bottom boundary points of the loose zone and the loose zone at the edge of the tuyere as the second partition node, and the bottom boundary points of the loose zone at the edge of the tuyere and the zone below the tuyere as the third partition node; A height calculation module, used to perform force balance calculation on the stress concentration area, the loose area at the edge of the tuyere and the area below the tuyere, and obtain the heights of the first partition node, the second partition node and the third partition node respectively; The state evaluation module is used to obtain the bottom contour of the dead material column based on the height of each partition node, so as to evaluate the state of the dead material column according to the bottom contour of the dead material column.

9. An electronic device, characterized in that: The electronic device comprises: one or more processors; A storage device for storing one or more programs, when the one or more programs are executed by the one or more processors, enables the electronic device to implement the dead material column state assessment method as described in any one of claims 1-7.

10. A computer-readable storage medium, characterized in that: A computer program is stored thereon, and when the computer program is executed by a processor of a computer, the computer is caused to execute the dead material column state evaluation method according to any one of claims 1 to 7.

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