Blast furnace hearth grouting method, system, equipment and medium

Abstract

The invention discloses a blast furnace hearth grouting method, system, equipment and medium, and relates to the technical field of metallurgical engineering.The method comprises the steps that under the condition that a protective layer is arranged in a furnace shell of a blast furnace hearth, a blast furnace is controlled to execute damping-down and production stopping operation, so that the protective layer is cooled and shrunk, and the blast furnace hearth is formed; the protective layer is formed on the basis of a refractory material until the temperature of the protective layer is reduced to be below a preset temperature threshold value and the protective layer is in a contraction state; the blast furnace hearth is controlled to carry out air supply production according to target air pressure and target air volume, so that the furnace shell is expanded under the action of the target air pressure, the protective layer is kept in the contraction state under the action of the target air volume, and a slurry supplementing space is formed between the furnace shell and the protective layer; and grouting is conducted on the grout supplementing space.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of metallurgical engineering, and in particular, to a blast furnace hearth grouting method, system, device and medium. BACKGROUND

[0002] At present, as the core equipment of steel production, the blast furnace takes on the important task of storing slag iron. The blast furnace hearth is in a key position in the whole ironmaking process, and it is in a harsh environment of high temperature and high pressure for a long time, and also suffers from chemical corrosion and continuous scouring of molten iron. After years of service, due to the repeated action of thermal stress and the gradual enrichment of harmful elements and other factors, the blast furnace hearth is prone to local corrosion. This corrosion phenomenon will further cause a series of serious problems, such as redness of the furnace shell, gas leakage, etc., and even bring huge safety hazards to the whole production process.

[0003] However, the high temperature and high pressure in the blast furnace hearth area will cause the deformation and expansion of the furnace shell on the outside and the refractory material on the inside. Specifically, when the blast furnace is blowing, the high pressure inside the blast furnace will cause the furnace shell to deform and expand elastically; and during the production process of the blast furnace, the high temperature transmitted by the slag iron in the hearth will cause the blast furnace refractory material to deform and expand. These deformations and expansions not only affect the normal structure and performance of the hearth, but also accelerate the corrosion rate of the hearth, making the originally serious hearth condition more complex and dangerous. Therefore, how to create more space between the furnace shell and the refractory material for grouting so that it is densely filled has become an important issue to be solved in the steel industry. SUMMARY

[0004] A series of simplified concepts are introduced in the summary section, which will be further described in detail in the specific embodiment section. The summary section of the present application does not mean to attempt to limit the key features and necessary technical features of the claimed technical solution, nor to attempt to determine the protection scope of the claimed technical solution.

[0005] In a first aspect, an embodiment of the present application provides a blast furnace hearth grouting method, which comprises:

[0006] In the case that a protective layer is arranged inside the furnace shell of the blast furnace hearth, the blast furnace is controlled to perform a shutdown operation, so that the protective layer cools down and shrinks until the temperature of the protective layer is reduced to below a preset temperature threshold and presents a shrinkage state, and the protective layer is formed based on refractory material;

[0007] controlling the blast furnace hearth to produce blast according to a target blast pressure and a target blast volume, so that the furnace shell is expanded under the target blast pressure, and the protection layer maintains the shrinkage state under the target blast volume, and a grouting space is formed between the furnace shell and the protection layer;

[0008] grouting the grouting space.

[0009] In an embodiment of the present application, before the grouting of the grouting space, the method further comprises:

[0010] obtaining a first deformation amount of the protection layer after temperature drop shrinkage and a second deformation amount of the furnace shell after expansion;

[0011] determining the size of the grouting space according to the first deformation amount and the second deformation amount, and matching a corresponding target grouting volume according to the size of the grouting space;

[0012] The grouting of the grouting space comprises:

[0013] Grouting the grouting space according to the target grouting volume.

[0014] In an embodiment of the present application, obtaining the first deformation amount of the protection layer after temperature drop shrinkage comprises:

[0015] obtaining a temperature drop amplitude of the protection layer;

[0016] calculating the first deformation amount of the protection layer after temperature drop shrinkage based on the temperature drop amplitude and the thermal expansion coefficient.

[0017] In an embodiment of the present application, obtaining the second deformation amount of the furnace shell after expansion comprises:

[0018] determining a furnace shell stress of the blast furnace based on the target blast pressure, an inner diameter of the furnace shell of the blast furnace, a thickness of the furnace shell of the blast furnace, a weld coefficient and a thin shell theoretical model, in the case that the temperature drop shrinkage of the protection layer is completed;

[0019] obtaining a strain amount of the blast furnace based on a ratio of the furnace shell stress and an elastic modulus of the furnace shell of the blast furnace;

[0020] obtaining the second deformation amount of the furnace shell based on a product of the strain amount and the inner diameter of the furnace shell.

[0021] In an embodiment of the present application, in the case that the temperature drop shrinkage of the protection layer is completed, the furnace shell stress of the blast furnace is determined based on the target blast pressure, the inner diameter of the furnace shell of the blast furnace, the thickness of the furnace shell of the blast furnace, the weld coefficient and the thin shell theoretical model, through the following formula:

[0022]

[0023] wherein σ is the furnace shell stress, P is the target air pressure, D i is the furnace shell inner diameter, δ n is the furnace shell thickness, and φ is the weld coefficient.

[0024] In an embodiment of the present application, the determining the size of the grouting space according to the first deformation amount and the second deformation amount comprises:

[0025] compensating the first deformation amount for the second deformation amount to determine the size of the grouting space between the protective layer and the furnace shell.

[0026] In an embodiment of the present application, the target air pressure is greater than or equal to 0.45 MPa.

[0027] In a second aspect, the present application provides a blast furnace hearth grouting system, comprising: a first control module, a second control module, and a grouting execution module.

[0028] The first control module is configured to: in the case that a protective layer is arranged inside a furnace shell of a blast furnace hearth, control the blast furnace to perform a shutdown operation so that the protective layer cools and shrinks until the temperature of the protective layer is reduced to below a preset temperature threshold and the protective layer is in a shrunk state, and the protective layer is formed based on a refractory material.

[0029] The second control module is configured to: control the blast furnace hearth to perform air supply production according to a target air pressure and a target air volume, so that the furnace shell expands under the action of the target air pressure, and the protective layer maintains the shrunk state under the action of the target air volume, and a grouting space is formed between the furnace shell and the protective layer.

[0030] The grouting execution module is configured to: perform grouting to the grouting space.

[0031] In a third aspect, an electronic device is provided, comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor is configured to execute the computer program stored in the memory to implement the steps of the blast furnace hearth grouting method according to any one of the first aspect.

[0032] In a fourth aspect, the present application further provides a computer readable storage medium having a computer program stored thereon, wherein the computer program is executable by a processor to implement the steps of the blast furnace hearth grouting method according to any one of the first aspect.

[0033] In summary, the blast furnace hearth grouting method provided by the embodiment of the present application, under the condition that a protective layer is arranged inside the furnace shell of the blast furnace hearth, the blast furnace is controlled to perform the blowing-off shutdown operation, so that the protective layer is cooled and shrunk until the temperature of the protective layer is reduced to below the preset temperature threshold and the protective layer is in the shrunk state, the blast furnace hearth is controlled to perform the air supply production according to the target air pressure and the target air volume, so that the furnace shell is expanded under the action of the target air pressure and the protective layer is maintained in the shrunk state under the action of the target air volume, the grouting space is formed between the furnace shell and the protective layer, the controllable grouting space is actively created, more space is created between the furnace shell and the protective layer for grouting, so that the structure strength is improved and the service life of the blast furnace is prolonged; the local temperature of the furnace shell is reduced, the risk of burning through is reduced, and the operation safety is improved; the problem can also be repaired without shutdown maintenance, the shutdown time is reduced, material waste is avoided, and the production cost is reduced, thereby providing protection for stable operation of the blast furnace and enterprise benefits.

[0034] The blast furnace hearth grouting method provided by the present application, other advantages, objects and features of the present application will be embodied in part through the following description, and part will be understood by those skilled in the art through research and practice of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0035] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments and are not meant to limit the present description. Moreover, the same reference numerals are used throughout the various drawings to designate the same or similar parts. In the drawings:

[0036] Figure 1 A blast furnace hearth grouting method flow chart is provided for the embodiment of the present application;

[0037] Figure 2 A blast furnace hearth grouting system structure schematic diagram is provided for the embodiment of the present application;

[0038] Figure 3 A blast furnace hearth grouting electronic device structure schematic diagram is provided for the embodiment of the present application. DETAILED DESCRIPTION

[0039] In order to better understand the technical solutions provided by the embodiments of the present application, the technical solutions of the embodiments of the present application will be described in detail below through the drawings and specific embodiments. It should be understood that the specific features in the embodiments of the present application and the embodiments are detailed descriptions of the technical solutions of the embodiments of the present application, and are not limitations of the technical solutions of the present application. In the case of no conflict, the technical features in the embodiments of the present application and the embodiments can be combined with each other.

[0040] In this document, relational terms such as first and second and the like can be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the presence of additional identical elements in the process, method, article, or apparatus that comprises the element. The terms "two or more" and "two or more than two" include both two and more than two entities.

[0041] Referring to Figure 1 A high furnace hearth grouting method provided by the embodiment of the application is shown in a flowchart, which can specifically include:

[0042] S110, in the case that a protection layer is arranged inside the furnace shell of the high furnace hearth, the high furnace is controlled to perform a blowdown operation so as to make the protection layer shrink due to temperature reduction until the temperature of the protection layer is reduced to below a preset temperature threshold and the protection layer is in a shrinkage state, and the protection layer is formed based on refractory material;

[0043] For example, the high furnace is stopped for production, that is, blowdown, to make the refractory material protection layer inside the hearth naturally shrink due to temperature reduction until the temperature is reduced to below the preset temperature threshold and the protection layer is in a shrinkage state, and the protection layer is formed based on refractory material. Specifically, during the blowdown of the high furnace, the temperature of the refractory material is reduced from high temperature to below the preset temperature threshold, such as from 700°C to 500°C, and the diameter is shrunk by 4.55 mm due to thermal expansion and contraction principle, and the diameter shrinkage is calculated based on the temperature reduction of 100°C and the thermal expansion coefficient of the refractory material. By accurately controlling the temperature reduction process, a predictable shrinkage amount of the refractory material is generated to create an initial space for subsequent grouting.

[0044] S120, the high furnace hearth is controlled to perform blast production according to a target blast pressure and a target blast volume, so as to make the furnace shell expand under the action of the target blast pressure and make the protection layer maintain the shrinkage state under the action of the target blast volume, and a grouting space is formed between the furnace shell and the protection layer;

[0045] The blast furnace is restarted, and the blast furnace hearth is blown according to the target air pressure and the target air volume, and a special operation mode of high air pressure and small air volume is adopted. The high air pressure causes the furnace shell to expand outward, and the small air volume slows down the temperature expansion of the refractory material, so as to form a large enough gap, that is, a grouting space, between the furnace shell and the protective layer. By using the characteristic that the pressure deformation rate is much higher than the temperature deformation rate, the superimposed space of the refractory material shrinkage and the furnace shell expansion is created, and the problem of insufficient space in the traditional method is solved.

[0046] S130, grouting is performed on the grouting space.

[0047] In the example, grouting material is injected into the gap between the furnace shell and the protective layer in the optimal grouting space state created above. The refractory grouting material is injected into the grouting space, which can compensate for the volatilization of the grouting material and the shrinkage of the solidification, and ensure the final filling and densification. The gapless filling is achieved, the gas channel is effectively blocked, the erosion area is repaired, and the structural integrity of the furnace body is restored.

[0048] In summary, the blast furnace hearth grouting method provided by the embodiment of the present application creates a controllable grouting space between the furnace shell and the protective layer by controlling the blast furnace to perform a blowdown operation to make the protective layer shrink due to temperature reduction until the temperature of the protective layer is reduced to below the preset temperature threshold and the protective layer is in a shrinkage state, controlling the blast furnace hearth to blow according to the target air pressure and the target air volume to make the furnace shell expand under the action of the target air pressure and the protective layer maintain the shrinkage state under the action of the target air volume, forming a grouting space between the furnace shell and the protective layer, actively creating a controllable grouting space, creating more space between the furnace shell and the protective layer for grouting, so that the filling is dense and the structural strength is improved, the service life of the blast furnace is prolonged, the local temperature of the furnace shell is reduced, the risk of burning through is reduced, the operation safety is improved, and the problem can be repaired without shutdown for maintenance, the downtime is reduced, material waste is avoided, and the production cost is reduced., provides protection for stable operation of the blast furnace and enterprise benefits.

[0049] In some examples, before the grouting is performed on the grouting space, the method further includes:

[0050] obtaining a first deformation amount of the protective layer after temperature shrinkage and a second deformation amount of the furnace shell after expansion;

[0051] determining the size of the grouting space according to the first deformation amount and the second deformation amount, and matching a corresponding target grout amount according to the size of the grouting space;

[0052] The grouting on the grouting space includes:

[0053] Grouting is performed on the grouting space according to the target grout amount.

[0054] For example, the blast furnace is stopped from blowing production, that is, the blowdown operation is performed, the protective layer inside the hearth is naturally cooled, the protective layer is formed based on refractory material, and the temperature of the refractory material is monitored until the temperature of the refractory material is below a preset temperature threshold, which is usually 500-600°C. After the temperature is stable, the shrinkage amount of the refractory material due to cooling, that is, the first deformation amount, is calculated. After the refractory material shrinks stably, the blast furnace blowing operation is restarted, and the target air pressure and the target air volume are used for blowing production, wherein the target air volume is controlled to be below 60% of the normal production. High air pressure can make the shell elastically expand, and small air volume can slow down the temperature rise of the refractory material to avoid its re-expansion.

[0055] Based on the first deformation amount and the second deformation amount, sufficient grouting space is created, and the corresponding target slurry amount is matched according to the size of the grouting space. When the grouting space reaches the maximum value, usually within 30-60 minutes after blowing, the target slurry amount is grouted into the grouting space. By quantitative calculation instead of empirical judgment, the grouting space is accurately matched with the material characteristics, and the problems of non-dense filling due to insufficient space or material waste due to excessive space are avoided.

[0056] In some examples, the first deformation amount of the protective layer after cooling and shrinking is obtained by:

[0057] The cooling range of the protective layer is obtained.

[0058] Based on the cooling range and the thermal expansion coefficient, the first deformation amount of the protective layer after cooling and shrinking is calculated.

[0059] For example, high-temperature thermocouples, such as K-type thermocouples, are arranged in different regions of the protective layer of the blast furnace hearth to monitor temperature changes in real time. During the blowdown of the blast furnace, the temperature of the protective layer is slowly reduced by natural cooling to avoid material cracking caused by rapid cooling. The initial temperature before cooling and the final temperature after cooling are recorded continuously to calculate the cooling range of the protective layer. Based on the cooling range of the protective layer and the thermal expansion coefficient, the first deformation amount of the protective layer after cooling and shrinking is calculated. The first deformation amount is obtained by the following formula:

[0060] ΔL = a · L0 · ΔT (1);

[0061] Where ΔL is the first deformation amount, a is the thermal expansion coefficient, L0 is the initial outer diameter of the refractory material, and ΔT is the cooling range. The accurately calculated first deformation amount is the basis for subsequent grouting space design and directly affects the amount of grouting material and filling effect. The present application uses scientific and quantitative methods to make the calculation accuracy of the refractory material shrinkage meet the engineering application requirements, and provides reliable data support for the repair of the blast furnace hearth.

[0062] In some examples, the obtaining the second deformation amount of the furnace shell after expansion includes:

[0063] In the case that the cooling and shrinkage of the protective layer is completed, the furnace shell stress of the blast furnace is determined based on the target air pressure, the inner diameter of the furnace shell of the blast furnace, the thickness of the furnace shell of the blast furnace, the weld coefficient and the thin shell theory model.

[0064] The strain amount of the blast furnace is obtained based on the ratio of the furnace shell stress and the elastic modulus of the furnace shell of the blast furnace.

[0065] The second deformation amount of the furnace shell is obtained based on the product of the strain amount and the inner diameter of the furnace shell.

[0066] For example, the furnace shell stress of the blast furnace is determined based on the target air pressure, the inner diameter of the furnace shell of the blast furnace, the thickness of the furnace shell of the blast furnace, the weld coefficient and the thin shell theory model, the strain amount of the blast furnace is obtained by dividing the furnace shell stress by the elastic modulus of the furnace shell of the blast furnace, and the second deformation amount of the furnace shell is obtained by multiplying the strain amount by the inner diameter of the furnace shell. Specifically, the inner diameter of the furnace shell of a certain blast furnace is 13560mm, the thickness is 65mm, the air pressure is 0.45MPa, and the weld coefficient is 0.85. The calculated stress σ is 0.45×13560 / (2×65×0.85) = 54.6MPa, the strain amount is 54.6MPa / 206GPa = 2.65×10 -4 , and the second deformation amount is 2.65×10 -4 ×13560mm = 3.26mm. The deformation of the furnace shell is accurately calculated by the theory of material mechanics, which avoids the error caused by experience estimation and makes the calculation accuracy of the expansion amount meet the engineering application requirements.

[0067] In some examples, in the case that the cooling and shrinkage of the protective layer is completed, the furnace shell stress of the blast furnace is determined based on the target air pressure, the inner diameter of the furnace shell of the blast furnace, the thickness of the furnace shell of the blast furnace, the weld coefficient and the thin shell theory model, and is obtained by the following formula:

[0068]

[0069] Wherein, σ is the furnace shell stress, P is the target air pressure, D i is the inner diameter of the furnace shell, δ n is the thickness of the furnace shell, and φ is the weld coefficient.

[0070] Exemplarily, the target wind pressure, the inner diameter of the furnace shell of the blast furnace, the thickness of the furnace shell of the blast furnace and the weld coefficient are brought into formula (2) to obtain the furnace shell stress of the blast furnace. Specifically, σ = 0.45 MPa x 13560 mm / (2 x 65 mm x 0.85) = 54.6 MPa, which is the furnace shell stress of the blast furnace and is used for subsequent strain and deformation calculation. The standardized calculation method is provided to ensure the consistency of the furnace shell stress calculation under different working conditions and provide a theoretical basis for engineering application.

[0071] In some examples, the size of the grouting space is determined according to the first deformation and the second deformation.

[0072] The first deformation is compensated for the second deformation to determine the size of the grouting space between the protective layer and the furnace shell.

[0073] Exemplarily, the first deformation is added to the second deformation to obtain the grouting space between the protective layer and the furnace shell. It is clear that the grouting space is obtained by superimposing the first deformation (refractory shrinkage) and the second deformation (furnace shell expansion). The direct correspondence between the deformation and the actual grouting space is established to ensure that the space calculation logic is clear and the result is reliable.

[0074] In some examples, the target wind pressure is greater than or equal to 0.45 MPa.

[0075] Exemplarily, the target wind pressure during the air supply operation must be greater than or equal to 0.45 MPa. In this application, 0.45 MPa wind pressure is used to ensure that the furnace shell produces an effective expansion of 3.26 mm, which together with the refractory shrinkage forms sufficient grouting space. By setting the lower limit of the wind pressure, it is ensured that the furnace shell expansion is not less than the critical value, and it is ensured that the grouting space meets the shrinkage compensation requirement of the grouting material.

[0076] The application will be described in detail below in conjunction with the embodiments, but they should not be understood as limiting the scope of protection of the application.

[0077] Embodiment:

[0078] A blast furnace, refractory material outer diameter 13000mm, furnace shell inner diameter 13560mm, furnace shell thickness 65mm, air supply pressure 0.45MPa, need to grouting gap thickness 15mm. Blast furnace shutdown, blast furnace hearth refractory material cooling shrinkage, refractory material cooling 100℃, calculated, refractory material diameter shrinkage 4.55mm. Then the blast furnace air supply production, using high air pressure small air volume operation. Through the high air pressure to improve the elastic deformation of the shell expansion, through the thin shell theory calculation formula and Hooke's law calculation, the shell diameter expansion 3.26mm. Refractory material shrinkage and shell expansion increase 7.81mm grouting space, can meet the grouting material volatile and solidification process volume shrinkage 34.24%. Make up dense, realize the goal of sealing gas channel, repair erosion area, maintain heat transfer system.

[0079] As Figure 2 shown, a blast furnace hearth grouting system is provided, the system comprising: a first control module 21, a second control module 22 and a grouting execution module 23;

[0080] The first control module 21 is configured to: in the case that a protective layer is arranged inside the furnace shell of the blast furnace hearth, control the blast furnace to perform shutdown operation, so that the protective layer cools and shrinks until the temperature of the protective layer is reduced to below the preset temperature threshold and presents a shrinkage state, and the protective layer is formed based on refractory material;

[0081] The second control module 22 is configured to: control the blast furnace hearth to perform air supply production according to target air pressure and target air volume, so that the furnace shell expands under the action of the target air pressure, and the protective layer maintains the shrinkage state under the action of the target air volume, and a grouting space is formed between the furnace shell and the protective layer;

[0082] The grouting execution module 23 is configured to: grout the grouting space.

[0083] The above system has the effects of the foregoing method when applied, which can be seen from the description of the foregoing method embodiments, and will not be repeated here.

[0084] As Figure 3 shown, an electronic device 300 is also provided, comprising a memory 310, a processor 320, and a computer program 311 stored in the memory 310 and executable on the processor, and the processor 320 implements the steps of any of the foregoing methods for blast furnace hearth grouting when executing the computer program 311.

[0085] Since the electronic device described in the embodiment is the device used in the implementation of the blast furnace hearth grouting device in the embodiment of the present application, based on the method described in the embodiment of the present application, those skilled in the art can understand the specific implementation of the electronic device in the embodiment and various changes thereof, so how the electronic device implements the method in the embodiment of the present application is not described in detail here, as long as the device used by those skilled in the art to implement the method in the embodiment of the present application belongs to the scope of the present application.

[0086] In the specific implementation process, the computer program 311 can realize the functions of the method in any one of the embodiments of the present application when executed by the processor. Figure 1 In the specific implementation process, the computer program 311 can realize the functions of the method in any one of the embodiments of the present application when executed by the processor.

[0087] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and the parts not described in detail in an embodiment can be referred to the related description of other embodiments.

[0088] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, a system, or a computer program product. Therefore, the present application can adopt a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can adopt the form of a computer program product implemented on one or more computer readable storage media (including but not limited to disk memory, CD-ROM, optical memory, etc.) containing computer readable program code.

[0089] The present application is described with reference to flowcharts and / or block diagrams according to the methods, devices (systems), and computer program products of the embodiments of the present application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and the combination of the flows and / or blocks in the flowcharts and / or block diagrams can be implemented by computer program instructions. These computer program instructions can be provided to the processor of a general-purpose computer, a special-purpose computer, an embedded computer, or other programmable data processing devices to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing devices produce a means for implementing the functions specified in the flowcharts and / or block diagrams. Figure 1 The means for implementing the functions specified in one or more flows and / or blocks. Figure 1 The means for implementing the functions specified in one or more flows and / or blocks.

[0090] These computer program instructions can also be stored in a computer readable memory capable of guiding the computer or other programmable data processing devices to work in a specific way, so that the instructions stored in the computer readable memory produce a product including instruction means, which implements the functions specified in the flowcharts and / or block diagrams. Figure 1 The means for implementing the functions specified in one or more flows and / or blocks. Figure 1 The means for implementing the functions specified in one or more flows and / or blocks.

[0091] These computer program instructions can also be loaded into a computer or other programmable data processing devices, so that a series of operation steps are performed on the computer or other programmable devices to generate a computer implemented process, so that the instructions executed on the computer or other programmable devices provide a process for implementing the flow Figure 1 The flow or the flows and / or the block Figure 1 The steps of the function specified in the flow or the flows and / or the block

[0092] The computer program product provided by the embodiment of the present application comprises computer software instructions, when the computer software instructions are run on the processing device, the processing device executes the flow of the LDPC decoding method of the solid state disk controller.

[0093] The computer program product comprises one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the flow or the function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer readable storage medium or transferred from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions can be transmitted from one website, computer, server or data center to another website, computer, server or data center through wired (for example, coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (for example, infrared, wireless, microwave, etc.) mode. The computer readable storage medium can be any available medium that the computer can store or the data storage device such as server, data center, etc. integrated with one or more available media sets. The available media can be magnetic media (for example, floppy disk, hard disk, magnetic tape), optical media (for example, DVD), or semiconductor media (for example, solid state disk (SSD)) and the like.

[0094] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be described here.

[0095] In several embodiments provided in the present application, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other manners. For example, the embodiments of the apparatus described above are merely schematic. For example, the division of the units is only a logical function division. There can be another division manner for the actual implementation. For example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between the units can be indirect couplings or communication connections through some interfaces, devices or units, and can be electrical, mechanical or in other forms.

[0096] The units described as separated components can or can not be physically separated, and the components displayed as units can or can not be physical units, i.e., can be located in one place, or can be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purposes of the embodiments of the present application.

[0097] In addition, each functional unit in the embodiments of the present application can be integrated in a processing unit, or each unit can exist physically as a separate unit, or two or more units can be integrated in one unit. The integrated unit can be implemented in the form of hardware, or in the form of a software functional unit.

[0098] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on such an understanding, the technical solutions of the present application essentially or substantially, or all or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium, and includes a plurality of instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the methods in the embodiments of the present application. The foregoing storage medium includes: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), magnetic disk or optical disk, and various media that can store program codes.

[0099] The above embodiments are only used to illustrate the technical solutions of the present application, rather than limit them. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features; and these modifications or replacements do not make the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

[0100] While the preferred embodiments of the application have been described, additional variations and modifications can be made to the embodiments by those skilled in the art once they learn of the basic inventive concepts. Therefore, the appended claims are intended to encompass within their scope all such variations and modifications as are included within the scope of the present description.

[0101] Obviously, numerous modifications and variations of the present application are possible in light of the above teachings. It is therefore to be understood that within the scope of the appended claims, the application can be practiced otherwise than as specifically described herein.

Claims

1. A method of grouting a blast furnace hearth, characterized in that, The method comprises: In the case that a protection layer is arranged inside the furnace shell of the blast furnace hearth, the blast furnace is controlled to perform a blow-off shutdown operation, so that the protection layer is cooled and shrunk until the temperature of the protection layer is reduced to below a preset temperature threshold and the protection layer is in a shrunk state, and the protection layer is formed based on refractory material; The blast furnace hearth is controlled to perform blast production according to a target blast pressure and a target blast volume, so that the furnace shell is expanded under the action of the target blast pressure, and the protection layer is maintained in the shrunk state under the action of the target blast volume, and a grouting space is formed between the furnace shell and the protection layer; Grouting is performed on the grouting space.

2. The method of claim 1, wherein, Before the grouting is performed on the grouting space, the method further comprises: A first deformation amount of the protection layer after being cooled and shrunk and a second deformation amount of the furnace shell after being expanded are obtained; According to the first deformation amount and the second deformation amount, the size of the grouting space is determined, and a corresponding target grouting volume is matched according to the size of the grouting space; The grouting on the grouting space comprises: Grouting is performed on the grouting space according to the target grouting volume.

3. The method of claim 2, wherein the step of injecting the slurry into the hearth of the blast furnace is performed by a method comprising the steps of: The first deformation amount of the protection layer after being cooled and shrunk comprises: ​ A cooling amplitude of the protection layer is obtained; Based on the cooling amplitude and a thermal expansion coefficient, the first deformation amount of the protection layer after being cooled and shrunk is calculated.

4. The blast furnace hearth grouting method according to claim 2, characterized in that, The second deformation amount of the furnace shell after being expanded comprises: In the case that the cooling and shrinking of the protection layer is completed, the furnace shell stress of the blast furnace is determined based on the target blast pressure, the inner diameter of the furnace shell of the blast furnace, the thickness of the furnace shell of the blast furnace, a weld coefficient and a thin shell theoretical model; Based on the ratio of the furnace shell stress and the elastic modulus of the furnace shell of the blast furnace, the strain amount of the blast furnace is obtained; Based on the product of the strain amount and the inner diameter of the furnace shell, the second deformation amount of the furnace shell is obtained.

5. The blast furnace hearth grouting method according to claim 4, characterized in that, In the case that the cooling and shrinking of the protection layer is completed, the furnace shell stress of the blast furnace is determined based on the target blast pressure, the inner diameter of the furnace shell of the blast furnace, the thickness of the furnace shell of the blast furnace, a weld coefficient and a thin shell theoretical model, by the following formula: where σ is the furnace shell stress, P is the target wind pressure, D i is the furnace shell inside diameter, δ n is the furnace shell thickness, and φ is the weld factor.

6. The method of claim 2, wherein, According to the first deformation amount and the second deformation amount, the size of the grouting space is determined, which comprises: The first deformation amount is compensated for the second deformation amount, and the size of the grouting space between the protection layer and the furnace shell is determined.

7. The method of claim 1, wherein, The target blast pressure is greater than or equal to 0.45 MPa.

8. A blast furnace hearth grouting system characterized by, The system comprises a first control module, a second control module and a grouting execution module; The first control module is configured to, in the case that a protection layer is arranged inside the furnace shell of the blast furnace hearth, control the blast furnace to perform a blow-off shutdown operation, so that the protection layer is cooled and shrunk until the temperature of the protection layer is reduced to below a preset temperature threshold and the protection layer is in a shrunk state, and the protection layer is formed based on refractory material; The second control module is configured to control the blast furnace hearth to perform blast production according to a target blast pressure and a target blast volume, so that the furnace shell is expanded under the action of the target blast pressure, and the protection layer is maintained in the shrunk state under the action of the target blast volume, and a grouting space is formed between the furnace shell and the protection layer; The grouting execution module is configured to perform grouting to the grouting space.

9. An electronic device comprising: Memory and a processor, wherein the processor is configured to implement the steps of the blast furnace hearth grouting method of any one of claims 1-7 when executing a computer program stored in the memory.

10. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is configured to implement the steps of the blast furnace hearth grouting method of any one of claims 1-7 when executed by the processor.

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