Blast furnace maintenance control method and related equipment

Abstract

The invention discloses a blast furnace maintenance control method and related equipment, relates to the field of blast furnace maintenance, and mainly aims to solve the problem that loss caused by rework after blast furnace maintenance is difficult to compensate at present. The method comprises the following steps: obtaining basic maintenance data of a blast furnace, the basic maintenance data comprising maintenance time data and initial in-furnace material data; the ratio of in-furnace material data is adjusted in batches on the basis of the maintenance time data so as to achieve target furnace temperature control, and the in-furnace material data is determined on the basis of the initial in-furnace material data; and determining additional coke parameters based on the initial in-furnace material data so as to compensate heat lost in the blast furnace overhaul blowing-out period.

Description

Technical Field

[0001] This invention relates to the field of blast furnace maintenance, and more particularly to a blast furnace maintenance control method and related equipment. Background Technology

[0002] Modern large blast furnaces require regular shutdowns for maintenance. However, during shutdowns, the furnace temperature drops sharply and the burden stagnates, resulting in significant heat loss. After restarting the furnace, the blast furnace faces a severe challenge: the furnace condition recovers slowly and unstablely, making it difficult to quickly return to the normal production level before the maintenance.

[0003] Current technologies generally address this issue by adding coke and "additional coke" before blast furnace shutdown to compensate for heat loss and maintain the furnace temperature baseline. However, traditional methods lack precise guidelines for adjustment magnitude and timing, and the placement of additional coke blocks is primarily based on experience, lacking scientific calculation. Therefore, it is difficult to accurately compensate for losses incurred during blast furnace restart after maintenance. Summary of the Invention

[0004] In view of the above problems, the present invention provides a blast furnace maintenance control method and related equipment, the main purpose of which is to solve the problem of the difficulty in compensating for the losses caused by the resumption of work after blast furnace maintenance.

[0005] To solve at least one of the above-mentioned technical problems, in a first aspect, the present invention provides a blast furnace maintenance control method, the method comprising:

[0006] Acquire basic maintenance data for the blast furnace, wherein the basic maintenance data includes maintenance time data and initial furnace material data;

[0007] The proportion of furnace materials is adjusted in batches based on the maintenance time data to achieve target furnace temperature control. The furnace material data is determined based on the initial furnace material data.

[0008] Additional coke parameters are determined based on the initial in-furnace material data to compensate for the heat loss during blast furnace maintenance shutdowns.

[0009] Optionally, the maintenance time data includes: maintenance start time and estimated maintenance duration.

[0010] The step of adjusting the proportions of materials inside the furnace in batches based on the maintenance time data to achieve target furnace temperature control includes:

[0011] Based on the maintenance start time and the estimated maintenance duration, the maintenance is divided into three batches;

[0012] The amount of ore was gradually reduced and the proportion of coke was increased in three batches to control the bed structure.

[0013] Optionally, the stepwise reduction of ore quantity and increase of coke proportion in the three batches to control the bed structure includes:

[0014] In the case of the first batch, reduce the weight of the ore batch and the ratio of raw ore, while keeping the weight of the coke batch unchanged;

[0015] In the case of the second batch, the weight of the ore batch and the ratio of raw ore were reduced, while the weight of the coke batch remained unchanged, and the alumina content in the slag was tested.

[0016] Fluorite is added when the alumina content in the slag exceeds a preset threshold.

[0017] In the case of the third batch, reduce the ore-to-coke ratio, ore batch weight, and raw ore ratio, and test the alumina content in the slag;

[0018] Fluorite is added when the alumina content in the slag exceeds a preset threshold.

[0019] Optionally, the initial in-furnace material data includes: the blast furnace daily operating blast furnace blast volume per ton of iron, the estimated maintenance duration, and the cumulative blast volume and oxygen content during the maintenance period.

[0020] The determination of additional coke parameters based on the initial in-furnace material data to compensate for heat loss during blast furnace maintenance shutdowns includes:

[0021] Additional coke parameters are determined based on the daily iron consumption per ton of blast furnace, the estimated maintenance duration, and the cumulative amount of air and oxygen during the maintenance period.

[0022] The amount of additional coke is determined based on the aforementioned additional coke parameters;

[0023] The additional coke quantity is used to compensate for the heat lost during blast furnace maintenance shutdowns.

[0024] Optionally, the above methods also include:

[0025] In the case of the first batch, the additional coke is controlled to be located in the upper middle part of the furnace belly.

[0026] Optionally, the above methods also include:

[0027] The distribution of additional coke on the blast furnace cross section is controlled so that it is less in the center than at the edges.

[0028] Optionally, the above methods also include:

[0029] While increasing the proportion of coke, the amount of pulverized coal and oxygen was reduced.

[0030] Secondly, embodiments of the present invention also provide a blast furnace maintenance control device, comprising:

[0031] The acquisition unit is used to acquire the basic maintenance data of the blast furnace, wherein the basic maintenance data includes maintenance time data and initial furnace material data;

[0032] An adjustment unit is used to adjust the proportion of furnace material data in batches based on the maintenance time data in order to achieve target furnace temperature control, wherein the furnace material data is determined based on the initial furnace material data;

[0033] The determining unit is used to determine additional coke parameters based on the initial in-furnace material data to compensate for the heat loss during blast furnace maintenance shutdowns.

[0034] To achieve the above objectives, according to a third aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium comprising a stored program, wherein, when the program is executed by a processor, the steps of the above-described blast furnace maintenance control method are implemented.

[0035] To achieve the above objectives, according to a fourth aspect of the present invention, an electronic device is provided, comprising at least one processor and at least one memory connected to the processor; wherein the processor is configured to invoke program instructions in the memory to execute the steps of the blast furnace maintenance control method described above.

[0036] By employing the above technical solution, the blast furnace maintenance control method and related equipment provided by this invention address the problem of difficulty in compensating for losses incurred during blast furnace restarts after maintenance. This invention obtains basic maintenance data for the blast furnace, including maintenance time data and initial in-furnace material data. Based on the maintenance time data, the proportion of in-furnace material data is adjusted in batches to achieve target furnace temperature control. The in-furnace material data is determined based on the initial in-furnace material data. Additional coke parameters are determined based on the initial in-furnace material data to compensate for heat loss during blast furnace shutdowns. In this solution, the in-furnace material proportion is adjusted in batches and gradually based on maintenance time data. By gradually reducing the ore quantity and increasing the coke proportion according to predetermined time nodes, the material layer structure is actively reconstructed before shutdown, avoiding excessively thick ore layers that obstruct the restart airflow and reserving a base furnace temperature, i.e., the target furnace temperature. The accumulated heat loss during the shutdown is calculated based on the initial burden data and converted into spatially positioned coke energy carriers, i.e., additional coke parameters. By scientifically designing the amount of additional coke added, heat loss during blast furnace shutdowns can be precisely offset, avoiding fluctuations in furnace conditions caused by localized overheating or undercooling. This quantifies the maintenance shutdown time as an equivalent of heat loss, and dynamically reconstructs the furnace's thermodynamic balance accordingly, compensating for losses incurred during blast furnace restarts after maintenance.

[0037] Correspondingly, the blast furnace maintenance control device, equipment, and computer-readable storage medium provided in the embodiments of the present invention also have the above-mentioned technical effects.

[0038] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0039] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0040] Figure 1 A flowchart illustrating a blast furnace maintenance control method provided by an embodiment of the present invention is shown.

[0041] Figure 2 This diagram illustrates the composition of a blast furnace maintenance control device according to an embodiment of the present invention.

[0042] Figure 3 This diagram illustrates the composition of an electronic control device for blast furnace maintenance provided in an embodiment of the present invention. Detailed Implementation

[0043] Exemplary embodiments of the invention will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the invention are shown in the drawings, it should be understood that the invention may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this invention will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0044] To address the problem of uncompensated losses incurred during the resumption of blast furnace operations after maintenance, this invention provides a blast furnace maintenance control method, such as... Figure 1 As shown, the method includes:

[0045] S101. Obtain basic maintenance data of the blast furnace, wherein the basic maintenance data includes maintenance time data and initial furnace material data;

[0046] For example, the aforementioned maintenance baseline data refers to the set of core parameters that must be obtained before the blast furnace is shut down for maintenance, which forms the basis for subsequent operational decisions.

[0047] S102. Adjust the proportion of furnace material data in batches based on the maintenance time data to achieve target furnace temperature control, wherein the furnace material data is determined based on the initial furnace material data;

[0048] In one embodiment, the maintenance time data includes: maintenance start time and estimated maintenance duration.

[0049] The step of adjusting the proportions of materials inside the furnace in batches based on the maintenance time data to achieve target furnace temperature control includes:

[0050] Based on the maintenance start time and the estimated maintenance duration, the maintenance is divided into three batches;

[0051] The amount of ore was gradually reduced and the proportion of coke was increased in three batches to control the bed structure.

[0052] For example, the maintenance start time is the planned start time of the air shutdown, determining the initiation node for adjustment operations. The estimated maintenance duration is the total duration of the air shutdown maintenance, determining the degree of heat loss and the intensity of adjustment. Three batches (not absolutely limited and can be flexibly adjusted according to specific circumstances): Divide the operation window before maintenance into three consecutive time periods (e.g., 36 hours, 24 hours, and 12 hours before the air shutdown) to achieve gradual adjustment. Reduce ore quantity: Gradually reduce the ore batch weight (ore batch) to decrease the ore accumulation thickness in the burden. Increase coke ratio: Increase the mass proportion of coke in the furnace charge, reduce the ore-to-coke ratio, and optimize fuel distribution. Control the burden structure: Through the coordinated adjustment of ore / coke, reconstruct the physical spatial layout and chemical energy distribution of materials in the furnace.

[0053] This application, based on the start point of the shutdown, gradually reduces the ore batch weight and increases the coke ratio within a preset time window (three batches). Reducing the ore quantity lowers the bulk density of the ore layer in the burden column, preventing an excessively thick upper ore layer from obstructing the airflow upwards during restart, thus optimizing the burden column's permeability. Increasing the coke ratio enhances the supporting role of the coke while thinning the ore layer, forming a more stable porous framework structure, and simultaneously improving the heat storage capacity per unit volume of burden, reserving basic thermal energy for the shutdown period.

[0054] The aforementioned batch adjustments achieved a step-by-step thermodynamic state transition. Each batch of operations gradually reduced the cooling effect of the ore (endothermic reaction source) while increasing the exothermic potential of the coke, allowing the furnace heat capacity to slowly rise to the target furnace temperature level.

[0055] This application reconstructs the material layer structure by controlling the spatial ratio of ore and coke, forming a gradient structure that is sparse on top and dense on the bottom. During the re-airing process, the high-temperature airflow can quickly penetrate the material layer and activate the stagnant furnace charge. The increased coke ratio provides immediate combustion fuel for the initial stage of re-airing and shortens the ignition delay time.

[0056] In one embodiment, the step of gradually reducing the ore quantity and increasing the coke ratio in the three batches to control the bed structure includes:

[0057] In the case of the first batch, reduce the weight of the ore batch and the ratio of raw ore, while keeping the weight of the coke batch unchanged;

[0058] In the case of the second batch, the weight of the ore batch and the ratio of raw ore were reduced, while the weight of the coke batch remained unchanged, and the alumina content in the slag was tested.

[0059] Fluorite is added when the alumina content in the slag exceeds a preset threshold.

[0060] In the case of the third batch, reduce the ore-to-coke ratio, ore batch weight, and raw ore ratio, and test the alumina content in the slag;

[0061] Fluorite is added when the alumina content in the slag exceeds a preset threshold.

[0062] For example, the ore batch weight refers to the total mass of ore added to the blast furnace in a single batch, directly affecting the thickness and permeability of the burden layer. The raw ore ratio is the proportion of raw ore (unsintered natural ore) in the total ore volume; a high proportion of raw ore increases smelting difficulty and slag volume. The coke batch weight is the total mass of coke added to the blast furnace in a single batch, serving as the core fuel and permeability framework. The alumina content in the slag is the mass concentration of alumina in the slag; exceeding this concentration significantly increases slag viscosity. The preset threshold is a safe alumina concentration limit set according to the blast furnace slag flowability requirements. Fluorite is a flux additive used to reduce the viscosity of high-melting-point slag.

[0063] The core of this application is the gradual reconstruction of the ore system:

[0064] The first batch aims to maintain a stable coke skeleton:

[0065] Reduce the weight of the ore batch (shrink the ore layer volume) and lower the raw ore ratio (reduce the amount of refractory ore), while keeping the coke batch weight constant. This initially optimizes permeability while avoiding airflow turbulence caused by abrupt changes in the coke skeleton; the reduced raw ore ratio decreases inefficient smelting reactions and reserves heat capacity space for subsequent operations.

[0066] The second batch continues with structural optimization:

[0067] Continue to reduce the weight of raw ore batches to the ratio of raw ore to coke batches, while keeping the weight of coke batches unchanged. Further increase the porosity of the feed column, but the continued reduction in ore quantity may lead to insufficient slag quantity and changes in slag phase composition (such as alumina enrichment).

[0068] The third batch, enhanced fuel reserves:

[0069] Simultaneously reduce the ore-to-coke ratio (significantly increasing the proportion of coke), ore batch weight, and raw ore ratio. A lower ore-to-coke ratio directly enhances the thermal compensation capacity of coke; a reduction in ore batch and raw ore ratio completely achieves "lightweighting" of the feedstock, forming a low-resistance, high-fuel-density thermal restart foundation structure.

[0070] Using the above technical solution, as the ore batch weight and raw ore ratio decrease, the reduced slag volume leads to a relative increase in alumina concentration in the slag (concentration = total alumina content / slag volume). If this exceeds a threshold, alumina forms high-melting-point compounds with calcium and magnesium, causing a sharp increase in slag viscosity and blocking the optimized airflow channels. When excessive alumina is detected in the second and third batches, fluorite is added immediately. Its fluoride ions can destroy the crystal structure of high-melting-point minerals (such as calcium aluminum feldspar), transforming the solid slag phase into a liquid ionic solution and quickly restoring slag fluidity. Reducing the ore batch optimizes the physical structure, lowering the raw ore ratio reduces the generation of ineffective slag, and adding fluorite hedges against the risk of compositional changes. Together, these three factors optimize the bed structure without causing slag blockage.

[0071] S103. Determine additional coke parameters based on the initial in-furnace material data to compensate for the heat loss during blast furnace maintenance shutdown.

[0072] In one embodiment, the initial in-furnace material data includes: the blast furnace daily operating blast furnace blast volume per ton of iron, the estimated maintenance duration, and the cumulative blast volume and oxygen content during the maintenance period.

[0073] The determination of additional coke parameters based on the initial in-furnace material data to compensate for heat loss during blast furnace maintenance shutdowns includes:

[0074] Additional coke parameters are determined based on the daily iron consumption per ton of blast furnace, the estimated maintenance duration, and the cumulative amount of air and oxygen during the maintenance period.

[0075] The amount of additional coke is determined based on the aforementioned additional coke parameters;

[0076] The additional coke quantity is used to compensate for the heat lost during blast furnace maintenance shutdowns.

[0077] For example, the blast volume per ton of iron is the blast volume (including oxygen) consumed to produce one unit of molten iron during normal blast furnace smelting, reflecting the energy input benchmark per unit of product. The estimated maintenance duration is the total planned shutdown maintenance time, determining the duration of energy loss due to production interruption. The cumulative blast volume and oxygen content is the total theoretical blast and oxygen content not utilized during maintenance (calculated based on normal operating parameters), characterizing the theoretical heat loss equivalent during the shutdown period. Additional coke parameters are key operational variables calculated, including the total amount of additional coke, the batch added, and its spatial location. The additional coke quantity is the mass of coke that needs to be added to the blast furnace as an energy carrier for heat loss compensation.

[0078] The aforementioned blast furnace air consumption per ton of iron serves as a benchmark for blast furnace energy efficiency, binding unit iron production with blast and oxygen consumption as an energy conversion factor, such as XX blast volume required per ton of iron. The estimated maintenance duration provides a time scale; by multiplying "blast consumption per ton of iron × shutdown time," the accumulated ineffective blast volume during the shutdown period can be estimated, representing unused blast and oxygen resources. The accumulated blast and oxygen further validates this estimate, representing the theoretical maximum heat loss during the shutdown period. These three factors together construct a dynamic heat loss model, transforming the abstract downtime into a concrete energy gap.

[0079] Based on the aforementioned heat loss model, the oxygen and wind loss is converted inversely into the equivalent heat release from coke combustion, thereby determining the total amount of coke to be compensated, i.e., the additional coke amount. By adding additional coke to the furnace, the chemical energy released by the coke combustion after the blast furnace restarts directly offsets the heat loss during the shutdown period. Unusable oxygen and wind energy, i.e., the loss during the shutdown period, is replaced with storable solid fuel energy, achieving a spatiotemporal transfer of energy form. Oxygen and wind loss occurs during the shutdown period, while coke energy release occurs during the restart period. Ultimately, through the directional combustion of coke, energy is precisely released during the restart period, completing the spatiotemporal transfer compensation of the heat gap. The non-storable gaseous energy loss is converted into pre-embedded solid energy reserves (coke), achieving precise control of the blast furnace thermal balance interruption and restart.

[0080] In one embodiment, the above method further includes:

[0081] In the case of the first batch, the additional coke is controlled to be located in the upper middle part of the furnace belly.

[0082] For example, the first batch refers to the earliest batch of supplementary coke added before the shutdown for maintenance, which plays a core compensatory role. Supplementary coke: coke blocks added extra to offset heat loss during shutdown, serving as a solid energy carrier. The upper and middle part of the furnace belly is a specific space region within the blast furnace, located above the combustion zone and below the furnace waist, and is the core location where the coke undergoes intense gasification and direct reduction reactions.

[0083] Considering that the upper and middle parts of the furnace belly are in the high-temperature zone (approximately 1300-1500℃), but lower than the intense combustion zone of coke (tuyere zone >1700℃), the coke primarily undergoes endothermic gasification reactions rather than exothermic combustion within this temperature range. Therefore, it possesses controllable energy release characteristics, absorbing the rising hot airflow from the lower combustion zone while avoiding the risk of overheating due to its own instantaneous intense combustion. This region is also an active zone for the direct reduction of iron oxides. The additional coke provides a solid carbon source here, accelerating the formation of metallic iron and shortening the slag-iron formation cycle after reflow. Positioning the first batch of additional coke in the upper and middle parts of the furnace belly makes it a hub connecting the upper and lower energy levels: downward transfer: absorbing the heat from the rising high-temperature airflow in the tuyere zone of the combustion zone, converting thermal energy into chemical energy through gasification; upward transfer: the generated CO gas enters the low-temperature zone of the middle furnace body, participating in indirect reduction reactions, achieving cascaded energy utilization. This scheme allows coke energy to diffuse upwards in the form of chemical energy (CO), rather than relying solely on thermal conduction, significantly improving heat utilization efficiency.

[0084] In one embodiment, the above method further includes:

[0085] The distribution of additional coke on the blast furnace cross section is controlled so that it is less in the center than at the edges.

[0086] For example, the blast furnace cross-section is a cross-section perpendicular to the central axis of the blast furnace, divided into a central region near the furnace core and an edge region near the furnace wall. This application sets the coke distribution density on the cross-section to exhibit a gradient characteristic of high density at the edges and low density at the center.

[0087] Considering the lower temperature at the blast furnace edge due to heat dissipation from the furnace wall, and the tendency of high-temperature airflow to rise along the low-resistance edge annular gap during the initial stage of reflow, traditional uniform coke distribution results in insufficient coke reactivity in the low-temperature edge zone, leading to excessive airflow at the edge but low heat utilization, while the central zone forms a "dead column" due to insufficient airflow penetration. This application increases the coke accumulation in the edge zone, forming a high-porosity framework. The coke layer slows down heat dissipation from the furnace wall, increasing the base temperature of the edge zone; the highly permeable coke framework guides the airflow to diffuse evenly, preventing short-circuiting of the edge airflow; more coke provides a sufficient carbon source, allowing CO2 in the rising gas flow to be fully reduced to CO in the edge zone, releasing heat to activate the edge zone. By strengthening the coke density at the edge, a composite structure with insulation, flow guidance, and energy release functions is constructed, suppressing ineffective oxygen dissipation and the risk of local overheating, and improving the permeability and thermal stability of the central column.

[0088] In one embodiment, the above method further includes:

[0089] While increasing the proportion of coke, the amount of pulverized coal and oxygen was reduced.

[0090] For example, increasing the proportion of coke essentially enhances the basic heat capacity of solid fuels. As a porous, skeletal fuel, coke's combustion rate is diffusion-controlled (the ash layer on the coke surface hinders oxygen diffusion), resulting in a relatively slow and uniform heat release. This application simultaneously reduces pulverized coal because its instantaneous volatile matter combustion in the high-temperature zone can trigger localized thermal shocks, especially during the initial reflow stage when the fuel column is not yet activated, easily leading to insufficient pulverized coal flow penetration and unburned pulverized coal accumulation. Shifting the primary energy supply from highly reactive pulverized coal to coke with a more gradual heat release reduces the rapid temperature rise and airflow turbulence caused by the intense combustion of pulverized coal.

[0091] By employing the above technical solution, the blast furnace maintenance control method and related equipment provided by this invention address the problem of difficulty in compensating for losses incurred during blast furnace restarts after maintenance. This invention obtains basic maintenance data for the blast furnace, including maintenance time data and initial in-furnace material data. Based on the maintenance time data, the proportion of in-furnace material data is adjusted in batches to achieve target furnace temperature control. The in-furnace material data is determined based on the initial in-furnace material data. Additional coke parameters are determined based on the initial in-furnace material data to compensate for heat loss during blast furnace shutdowns. In this solution, the in-furnace material proportion is adjusted in batches and gradually based on maintenance time data. By gradually reducing the ore quantity and increasing the coke proportion according to predetermined time nodes, the material layer structure is actively reconstructed before shutdown, avoiding excessively thick ore layers that obstruct the restart airflow and reserving a base furnace temperature, i.e., the target furnace temperature. The accumulated heat loss during the shutdown is calculated based on the initial burden data and converted into spatially positioned coke energy carriers, i.e., additional coke parameters. By scientifically designing the amount of additional coke added, heat loss during blast furnace shutdowns can be precisely offset, avoiding fluctuations in furnace conditions caused by localized overheating or undercooling. This quantifies the maintenance shutdown time as an equivalent of heat loss, and dynamically reconstructs the furnace's thermodynamic balance accordingly, compensating for losses incurred during blast furnace restarts after maintenance.

[0092] Furthermore, as a response to the above Figure 1 In addition to the implementation of the method shown, this embodiment of the invention also provides a blast furnace maintenance control device for the above-mentioned... Figure 1 The method shown is implemented accordingly. This device embodiment corresponds to the foregoing method embodiment. For ease of reading, this device embodiment will not repeat the details of the foregoing method embodiment, but it should be clear that the device in this embodiment can implement all the contents of the foregoing method embodiment. Figure 2 As shown, the device includes: an acquisition unit 21, an adjustment unit 22, and a determination unit 23, wherein...

[0093] Acquisition unit 21 is used to acquire basic maintenance data of blast furnace, wherein the basic maintenance data includes maintenance time data and initial furnace material data;

[0094] The adjustment unit 22 is used to adjust the proportion of the furnace material data in batches based on the maintenance time data in order to achieve target furnace temperature control, wherein the furnace material data is determined based on the initial furnace material data;

[0095] The determining unit 23 is used to determine additional coke parameters based on the initial in-furnace material data to compensate for the heat loss during blast furnace maintenance shutdowns.

[0096] The processor contains a kernel, which retrieves the corresponding program units from memory. One or more kernels can be configured, and by adjusting kernel parameters, a blast furnace maintenance control method can be implemented, which can solve the problem of uncompensated losses caused by restarting blast furnaces after maintenance.

[0097] This invention provides a computer-readable storage medium including a stored program that, when executed by a processor, implements the blast furnace maintenance control method.

[0098] This invention provides a processor for running a program, wherein the program executes the blast furnace maintenance control method during runtime.

[0099] This invention provides an electronic device, which includes at least one processor and at least one memory connected to the processor; wherein the processor is used to call program instructions in the memory to execute the blast furnace maintenance control method described above.

[0100] This invention provides an electronic device 30, such as... Figure 3 As shown, the electronic device includes at least one processor 301, and at least one memory 302 and bus 303 connected to the processor; wherein, the processor 301 and the memory 302 communicate with each other through the bus 303; the processor 301 is used to call program instructions in the memory to execute the above-mentioned blast furnace maintenance control method.

[0101] The smart electronic devices mentioned in this article can be PCs, tablets, mobile phones, etc.

[0102] This application also provides a computer program product that, when executed on a process management electronic device, is suitable for executing a program that initializes the steps of the above-described blast furnace maintenance control method.

[0103] It should be noted that the descriptions of each embodiment in the above embodiments have different focuses. For parts that are not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0104] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0105] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create a machine for implementing the flowchart illustrations. Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0106] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0107] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0108] This application also provides a computer program product, which includes computer software instructions that, when executed on a processing device, cause the processing device to perform actions such as... Figure 1 The control flow of the memory in the corresponding embodiment.

[0109] A computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the flow or function according to the embodiments of this application is generated. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another. For example, computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) means. The computer-readable storage medium may be any available medium that a computer can store or a data storage device such as a server or data center that integrates one or more available media. The available medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid-state disk (SSD)).

[0110] Those skilled in the art will clearly understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0111] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces, or indirect coupling or communication connection between apparatuses or units, and may be electrical, mechanical, or other forms.

[0112] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0113] Furthermore, the functional units in the various embodiments of this application can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0114] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this application. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0115] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.

Claims

1. A blast furnace maintenance control method, characterized in that, include: Acquire basic maintenance data for the blast furnace, wherein the basic maintenance data includes maintenance time data and initial furnace material data; The proportion of furnace materials is adjusted in batches based on the maintenance time data to achieve target furnace temperature control. The furnace material data is determined based on the initial furnace material data. Additional coke parameters are determined based on the initial in-furnace material data to compensate for the heat loss during blast furnace maintenance shutdowns.

2. The method according to claim 1, characterized in that, The maintenance time data includes: maintenance start time and estimated maintenance duration. The step of adjusting the proportions of materials inside the furnace in batches based on the maintenance time data to achieve target furnace temperature control includes: Based on the maintenance start time and the estimated maintenance duration, the maintenance is divided into three batches; The amount of ore was gradually reduced and the proportion of coke was increased in three batches to control the bed structure.

3. The method according to claim 2, characterized in that, The method of gradually reducing the amount of ore and increasing the proportion of coke in the three batches to control the bed structure includes: In the case of the first batch, reduce the weight of the ore batch and the ratio of raw ore, while keeping the weight of the coke batch unchanged; In the case of the second batch, the weight of the ore batch and the ratio of raw ore were reduced, while the weight of the coke batch remained unchanged, and the alumina content in the slag was tested. Fluorite is added when the alumina content in the slag exceeds a preset threshold. In the case of the third batch, reduce the ore-to-coke ratio, ore batch weight, and raw ore ratio, and test the alumina content in the slag; Fluorite is added when the alumina content in the slag exceeds a preset threshold.

4. The method according to claim 1, characterized in that, The initial in-furnace material data includes: the blast furnace daily operating air consumption per ton of iron, the estimated maintenance duration, and the cumulative air and oxygen consumption during the maintenance period. The determination of additional coke parameters based on the initial in-furnace material data to compensate for heat loss during blast furnace maintenance shutdowns includes: Additional coke parameters are determined based on the daily iron consumption per ton of blast furnace, the estimated maintenance duration, and the cumulative amount of air and oxygen during the maintenance period. The amount of additional coke is determined based on the aforementioned additional coke parameters; The additional coke quantity is used to compensate for the heat lost during blast furnace maintenance shutdowns.

5. The method according to claim 1, characterized in that, Also includes: In the case of the first batch, the additional coke is controlled to be located in the upper middle part of the furnace belly.

6. The method according to claim 1, characterized in that, Also includes: The distribution of additional coke on the blast furnace cross section is controlled so that it is less in the center than at the edges.

7. The method according to claim 2, characterized in that, Also includes: While increasing the proportion of coke, the amount of pulverized coal and oxygen was reduced.

8. A blast furnace maintenance control device, characterized in that, Also includes: The acquisition unit is used to acquire the basic maintenance data of the blast furnace, wherein the basic maintenance data includes maintenance time data and initial furnace material data; An adjustment unit is used to adjust the proportion of furnace material data in batches based on the maintenance time data in order to achieve target furnace temperature control, wherein the furnace material data is determined based on the initial furnace material data; The determining unit is used to determine additional coke parameters based on the initial in-furnace material data to compensate for the heat loss during blast furnace maintenance shutdowns.

9. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored program, wherein, when the program is executed by a processor, it implements the steps of the blast furnace maintenance control method as described in any one of claims 1 to 7.

10. An electronic device, characterized in that, The electronic device includes at least one processor and at least one memory connected to the processor; wherein the processor is used to call program instructions in the memory to execute the steps of the blast furnace maintenance control method as described in any one of claims 1 to 7.

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