A method, apparatus, medium, and device for determining a softening zone of a blast furnace

Abstract

The application provides a method, device, medium and equipment for determining a softening zone of a blast furnace, comprising: determining distribution positions of each burden in the entire blast furnace throat based on a blast furnace simulation model; dividing the blast furnace throat area into multiple sub-areas; determining the mass fraction of each burden in each sub-area based on the distribution positions and the overall mass fraction of each burden; performing actual sampling mixing based on the mass fraction of each burden in each sub-area; determining a softening zone root position; determining the shape and position of the softening zone according to the softening start temperature, softening end temperature, melting temperature, dripping temperature of the burden sample in each sub-area and the temperature distribution result in the vertical direction of the blast furnace; in this way, the structural composition of the ore batch, the influence of the charging and distributing process on the burden distribution, the interaction between different burden structures and the heat transfer between the coal gas and different burdens are comprehensively considered, and therefore the accuracy of the shape and position determination of the softening zone can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of blast furnace ironmaking process, and in particular to a method and device for determining a soft melting zone of a blast furnace, a medium and equipment. BACKGROUND

[0002] The blast furnace can be divided into four regions, namely, a lump zone, a soft melting zone, a dripping zone and a combustion zone, from the tuyere to the blast hole, wherein the soft melting zone is the region with the worst permeability in the blast furnace. The soft melting zone in the blast furnace can be divided into various shapes such as inverted V-shaped and W-shaped. A reasonable shape of the soft melting zone has a positive effect on improving the pressure-volume relationship in the furnace, improving the utilization efficiency of the gas and strengthening the smelting of the blast furnace.

[0003] According to the dissection results of the blast furnace, the soft melting zone in the blast furnace maintains a layered structure when the materials are distributed, and therefore the distribution of the materials in the blast hole has a direct impact on the shape of the soft melting zone.

[0004] At present, the shape and root position of the soft melting zone are mainly determined based on the static pressure of the shaft, the temperature of the cooling wall and the cross temperature measurement. However, the softening performance of the materials is directly related to the distribution of the materials at the blast hole and the softening performance of the materials themselves in addition to the influence of the gas distribution. For example, the position and shape of the soft melting zone will be different between a blast furnace mainly using sintered ore and a blast furnace mainly using pellet ore under the same gas distribution. Meanwhile, since the materials are granular motion, particle segregation will occur during the charging process of the blast furnace. The change in the mass fraction distribution of the materials in the radial direction of the blast hole will also affect the shape and position of the soft melting zone in the blast furnace using a combination of sintered ore and pellet ore. Therefore, the accuracy cannot be ensured when the position and shape of the soft melting zone of the blast furnace are determined only by the pressure or temperature in the prior art. SUMMARY

[0005] In view of the problems in the prior art, the embodiments of the present application provide a method, device, medium and equipment for determining a soft melting zone of a blast furnace to solve or partially solve the technical problem that the shape and position of the soft melting zone of the blast furnace cannot be accurately determined in the prior art.

[0006] In a first aspect, the present application provides a method for determining a soft melting zone of a blast furnace, comprising:

[0007] determining the distribution positions of each material in the entire blast hole based on a pre-created simulation model of the blast furnace by using the discrete element method; the simulation model of the blast furnace is a model from the stock bin to the blast hole;

[0008] dividing the blast hole region into a plurality of sub-regions based on a preset division strategy;

[0009] Determine the mass fraction of each burden in each sub-region based on the distribution position of each burden in the whole blast furnace throat and the overall mass fraction of each burden; the burden includes sintered ore, pellet ore and lump ore;

[0010] Obtain a burden sample by actual sampling and mixing based on the mass fraction of each burden in each sub-region; determine the softening start temperature, softening end temperature, melting temperature and dropping temperature of the burden sample in each sub-region;

[0011] Determine the root position of the softening zone;

[0012] Determine the gas quantity of each sub-region, and determine the temperature distribution result in the vertical direction of the blast furnace based on the gas quantity of each sub-region and the heat transfer function between the gas and the burden;

[0013] Determine the shape and position of the softening zone according to the softening start temperature, softening end temperature, melting temperature, dropping temperature of the burden sample in each sub-region, the temperature distribution result in the vertical direction of the blast furnace and the root position of the softening zone.

[0014] In the above scheme, the blast furnace throat region is divided into multiple sub-regions based on the preset division strategy, including:

[0015] The position between two adjacent cross temperature measuring points of the blast furnace is taken as a boundary point, and the blast furnace throat is divided into i circular rings along the radial direction;

[0016] The blast furnace throat cross section is divided into j main regions with a temperature measuring couple as a marker; the number of sub-regions is i*j.

[0017] In the above scheme, the mass fraction of each burden in each sub-region is determined based on the distribution position of each burden in the whole blast furnace throat and the overall mass fraction of each burden, including:

[0018] Count the type of burden particles falling into the sub-region, the number of each type of burden particles and the total number of each type of burden particles in all regions;

[0019] Determine the weight of each burden based on the overall mass fraction of the burden and the total weight of the burden;

[0020] Determine the unit weight of the corresponding burden particles based on the weight of each burden and the total number of each type of burden particles;

[0021] For each sub-region, determine the mass fraction of each burden in the sub-region according to the number and unit weight of each type of burden particles in the sub-region.

[0022] In the above scheme, the root position of the softening zone is determined, including:

[0023] Obtain the temperature of each thermocouple of the furnace cooling wall and the static pressure monitoring value of the furnace at different elevations;

[0024] Fit each thermocouple temperature to obtain a first fitting curve; fit each static pressure of the furnace to obtain a second fitting curve;

[0025] Determine the softening zone root position according to the inflection point of the first fitting curve or the inflection point of the second fitting curve.

[0026] In the above scheme, the determination of the gas quantity of each sub-region comprises:

[0027] According to the formula Determine the gas quantity V of each sub-region ij ; wherein,

[0028] The T ij is the temperature of the cross temperature measuring point in the sub-region formed by the i-th annular in the j-th main region, S ij is the area of the sub-region formed by the i-th annular in the j-th main region, and the V is the total gas quantity of the blast furnace.

[0029] In the above scheme, the shape and position of the softening zone are determined according to the softening start temperature, softening end temperature, melting temperature, dripping temperature of the furnace charge sample in each sub-region and the temperature distribution result in the vertical direction of the blast furnace, comprising:

[0030] Mark the softening start temperature, softening end temperature, melting temperature and dripping temperature of the furnace charge sample in each sub-region in the temperature distribution result in the vertical direction of the blast furnace to obtain a plurality of temperature marking points;

[0031] Connect the plurality of temperature marking points in sequence to obtain the shape and position of the softening zone.

[0032] In a second aspect of the present application, a device for determining the softening zone of a blast furnace is provided, comprising:

[0033] A first determination unit is configured to determine the distribution position of each furnace charge in the entire blast furnace throat based on a pre-created blast furnace simulation model using the discrete element method; the blast furnace simulation model is a model from the stock bin to the blast furnace throat;

[0034] A division unit is configured to divide the blast furnace throat region into a plurality of sub-regions based on a preset division strategy;

[0035] A second determination unit is configured to determine the mass fraction of each furnace charge in each sub-region based on the distribution position of each furnace charge in the entire blast furnace throat and the overall mass fraction of each furnace charge; the furnace charge includes sintered ore, pellet ore and lump ore;

[0036] The third determining unit is used to perform actual sampling and mixing based on the mass fraction of each charge in each sub-region to obtain a charge sample; and to determine the softening start temperature, softening end temperature, melting temperature and dripping temperature of the charge sample in each sub-region.

[0037] The fourth determining unit is used to determine the root position of the softening zone; determine the gas volume of each sub-region; and determine the temperature distribution in the vertical direction of the blast furnace based on the gas volume of each sub-region and the heat transfer function between the gas and the furnace charge.

[0038] The fifth determining unit is used to determine the shape and position of the softening zone based on the softening start temperature, softening end temperature, melting temperature, dripping temperature, temperature distribution results in the vertical direction of the blast furnace, and the position of the root of the softening zone of the furnace charge sample in each sub-region.

[0039] In the above scheme, the partitioning unit is specifically used for:

[0040] Using the position between two adjacent cross-shaped temperature measuring points of the blast furnace as the boundary point, the furnace throat is divided into i rings radially.

[0041] Using the thermocouple as a marker, the furnace throat section is divided into j main regions; the number of the sub-regions is i*j.

[0042] A third aspect of the present invention provides a computer-readable storage medium having a computer program stored thereon that, when executed by a processor, implements the steps of the method described in any of the first aspects.

[0043] A fourth aspect of the present invention provides a computer device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, implements the steps of the method described in any of the first aspects.

[0044] The application provides a method, device, medium and equipment for determining a softening zone of a blast furnace, the method comprising the following steps: determining the distribution positions of each charge in the whole blast furnace throat by using a discrete element method based on a pre-created blast furnace simulation model; the blast furnace simulation model is a model from a stock bin to the blast furnace throat; dividing the blast furnace throat area into a plurality of sub-areas based on a preset division strategy; determining the mass fraction of each charge in each sub-area based on the distribution positions of each charge in the whole blast furnace throat and the overall mass fraction of each charge; the charges comprise sintered ore, pellet ore and lump ore; obtaining a charge sample by actually sampling and mixing based on the mass fraction of each charge in each sub-area; determining the softening start temperature, softening end temperature, melting temperature and dropping temperature of the charge sample in each sub-area; determining the root position of the softening zone and the gas quantity of each sub-area; determining the temperature distribution result in the vertical direction of the blast furnace based on the gas quantity of each sub-area and the heat transfer function between the gas and the charges; and determining the shape and position of the softening zone according to the softening start temperature, softening end temperature, melting temperature, dropping temperature of the charge sample in each sub-area, the temperature distribution result in the vertical direction of the blast furnace and the root position of the softening zone. In this way, the structure composition of the ore batch, the influence of the charging and distributing process on the distribution of the charges, the interaction between different charge structures and the heat transfer between the gas and different charges are comprehensively considered, so that the accuracy of determining the shape and position of the softening zone in the blast furnace is improved. BRIEF DESCRIPTION OF DRAWINGS

[0045] 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 intended to limit the scope of the application. Furthermore, the same reference numerals are used throughout the drawings to denote the same components.

[0046] In the drawings:

[0047] Figure 1 A flowchart of a method for determining a softening zone of a blast furnace according to an embodiment of the application is shown;

[0048] Figure 2 A schematic diagram of a sub-area division result of a blast furnace throat according to an embodiment of the application is shown;

[0049] Figure 3 A schematic diagram of the shape and position of a softening zone according to an embodiment of the application is shown;

[0050] Figure 4 A schematic diagram of the structure of a device for determining a softening zone of a blast furnace according to an embodiment of the application is shown;

[0051] Figure 5 A schematic diagram of the structure of a computer device according to an embodiment of the application is shown;

[0052] Figure 6 A structure diagram of a computer readable storage medium according to an embodiment of the present application is shown. DETAILED DESCRIPTION

[0053] Exemplary embodiments of the present disclosure will be described in detail with reference to the drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it is understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be accurately conveyed to those skilled in the art.

[0054] The embodiment of the present application provides a method for determining a soft melting zone of a blast furnace, as shown in the figure, the method comprises the following steps: Figure 1 The method comprises the following steps:

[0055] S110, based on a pre-created blast furnace simulation model, determining the distribution position of each charge in the entire blast furnace throat by using a discrete element method; the blast furnace simulation model is a model from a stock bin to a blast furnace throat;

[0056] Before creating the blast furnace simulation model, the embodiment needs to determine the charge structure used by the blast furnace, including: charge type, overall mass fraction of each charge, particle size, bulk density, and coke load, etc. The charge type includes: lump ore, sintered ore, and pellet.

[0057] Then a 1:1 simulation model from a stock bin to a blast furnace throat is created, and based on the blast furnace simulation model, the distribution position of each charge in the entire blast furnace throat is determined by using a discrete element method.

[0058] Specifically, because when the charges are distributed, the charges need to be sent from the stock bin, pass through the charging belt, the stock bin, and the distribution chute, and then enter different positions of the blast furnace, the embodiment can calculate the stress of the charges when passing through the charging belt, the stock bin, and the distribution chute by using the discrete element method, and then analyze the position of the charges falling into the blast furnace according to the stress, and further determine the distribution position of each charge in the entire blast furnace throat.

[0059] S111, based on a preset division strategy, dividing the blast furnace throat area into a plurality of sub-areas; determining the mass fraction of each charge in each sub-area based on the distribution position of each charge in the entire blast furnace throat and the overall mass fraction of each charge; the charges include: sintered ore, pellet, and lump ore;

[0060] In order to improve the determination accuracy of the soft melting zone, the embodiment also needs to divide the blast furnace throat area into a plurality of sub-areas based on a preset division strategy.

[0061] In one embodiment, based on a preset division strategy, the blast furnace throat area is divided into a plurality of sub-areas, including:

[0062] The position between two adjacent cross temperature measuring points of the blast furnace is taken as a boundary point, and the furnace throat is divided into i annular rings along the radial direction.

[0063] The furnace throat section is divided into j main regions by using the temperature measuring couple as a marker; the number of sub-regions is i*j.

[0064] In the blast furnace, the cross temperature measuring method is generally used to measure the temperature inside the blast furnace. In this embodiment, the position between two adjacent cross temperature measuring points of the blast furnace is taken as a boundary point, and the furnace throat is divided into i annular rings along the radial direction.

[0065] For example, as shown in Figure 2 , it is assumed that the cross temperature measuring method is provided with multiple temperature measuring points A1, A2, A3, A4 and A5, the boundary point between A1 and A2 is a, the boundary point between A2 and A3 is b, the boundary point between A3 and A4 is c, the boundary point between A4 and A5 is d, and the boundary point of A5 is e, so that the furnace throat can be divided into 5 annular rings along the radial direction.

[0066] Then, since the temperature measuring couple has 4 wires, the furnace throat interface can be divided into 4 main regions, and finally the number of sub-regions is 4*5=20. As shown in Figure 2 , the markers of the 20 sub-regions are 1-20.

[0067] After each sub-region is determined, the mass fraction of each burden in each sub-region needs to be determined based on the distribution position of each burden in the entire furnace throat and the overall mass fraction of each burden, including:

[0068] The type of burden particles falling into the sub-region, the number of each type of burden particles and the total number of each type of burden particles in all regions are counted;

[0069] The weight of each burden is determined based on the overall mass fraction of the burden and the total weight of the burden;

[0070] The unit weight of the corresponding burden particles is determined based on the weight of each burden and the total number of each type of burden particles;

[0071] For each sub-region, the mass fraction of each burden in the sub-region is determined according to the number and unit weight of each type of burden particles in the sub-region.

[0072] Specifically, as described above, the discrete element method can be used to determine the position of the burden falling into the blast furnace, and determine the number of each type of burden particle in each sub-region and the number of each type of burden particle, so that the total number of each type of burden particle in all sub-regions can be determined. Since the mass fraction of each type of burden and the total weight of all burdens are known, the weight of each type of burden can be determined, and then the weight of each type of burden is divided by the total number of all burden particles of that type to obtain the unit weight of the burden particles of that type.

[0073] For each sub-region, the number of particles of each type of burden in the sub-region is counted respectively, and the weight of the burden of the corresponding type in the sub-region is determined according to the unit weight of the burden particles of the corresponding type and the number of particles of the burden.

[0074] After the weight of all types of burden is determined, the total weight of the burden in the sub-region can be calculated, and the mass fraction of each type of burden in the sub-region can be determined.

[0075] S112, based on the mass fraction of each burden in each sub-region, actual sampling and mixing are performed to obtain a burden sample; the softening start temperature, the softening end temperature, the melting temperature and the dripping temperature of the burden sample in each sub-region are determined;

[0076] After the mass fraction of each type of burden in each sub-region is determined, for each sub-region, the actual burden sample of the corresponding weight is mixed according to the mass fraction of each burden, and the burden of each type is mixed to obtain a burden sample.

[0077] The burden sample of each sub-region is tested by a melting drop furnace to determine the softening start temperature, the softening end temperature, the melting temperature and the dripping temperature of the burden sample. Among them, the softening start temperature represents the start of softening of the burden, which means the start of softening of the burden; the dripping temperature is the end of softening. Therefore, the position of the softening zone can be determined according to the softening start temperature, the softening end temperature, the melting temperature and the dripping temperature.

[0078] S113, determining the position of the root of the softening zone;

[0079] Since the blast furnace body is a hollow body, the position of the root of the softening zone also needs to be determined. In one embodiment, determining the position of the root of the softening zone comprises:

[0080] Obtaining the temperature of each thermocouple of the cooling wall of the furnace body and the static pressure monitoring value of the furnace body at different elevations;

[0081] Fitting each thermocouple temperature to obtain a first fitting curve; fitting each static pressure of the furnace body to obtain a second fitting curve;

[0082] The location of the root of the soft melt band is determined based on the inflection point of the first or second fitted curve.

[0083] It should be noted that the position of the soft melt root determined by the first fitting curve and the position of the soft melt root determined by the second fitting curve are generally not much different. Therefore, if the positions of the soft melt root determined by the first fitting curve and the second fitting curve are within the predetermined error range, the position of the soft melt root can be the position determined by the inflection point of the first fitting curve or the position determined by the inflection point of the second fitting curve.

[0084] S114, determine the gas volume of each sub-region, and determine the temperature distribution in the vertical direction of the blast furnace based on the gas volume of each sub-region and the heat transfer function between the gas and the furnace charge;

[0085] Then, the gas volume of each sub-region is determined, and the gas distribution in the furnace throat is determined.

[0086] In one implementation, determining the gas quantity for each sub-region includes:

[0087] According to the formula Determine the gas volume V for each sub-region ij ;in,

[0088] T ij S represents the temperature of the cross-shaped temperature measuring point in the sub-region formed by the i-th ring in the j-th main region. ij Let V be the area of ​​the sub-region formed by the i-th ring in the j-th main region, and V be the total amount of gas in the blast furnace.

[0089] from Figure 2 It can be seen that, assuming the first ring is the outermost ring (i=1), and j=1, 2, 3, 4; then S 11 Can be Figure 2 The area of ​​the marked subregion B, T 11 For sub-region S 11 The temperature at the central cross temperature measuring point.

[0090] This allows us to determine the gas volume in each sub-region, and based on the gas volume in each sub-region and the heat transfer function between the gas and the furnace charge, we can determine the temperature distribution in the vertical direction of the blast furnace.

[0091] Specifically, the heat capacities of gas, coke, sinter, pellets, and lump ore are known, so the temperature distribution in the vertical direction of the blast furnace can be determined by the heat transfer function between gas, coke, and ore.

[0092] S115, determining the shape and position of the softening zone according to the softening start temperature, softening end temperature, melting temperature, dropping temperature of the burden sample in each sub-region, the temperature distribution result in the vertical direction of the blast furnace, and the root position of the softening zone.

[0093] After the temperature distribution result in the vertical direction of the blast furnace is determined, the shape and position of the softening zone are determined according to the softening start temperature, softening end temperature, melting temperature, dropping temperature of the burden sample in each sub-region, and the temperature distribution result in the vertical direction of the blast furnace.

[0094] In an embodiment, the shape and position of the softening zone are determined according to the softening start temperature, softening end temperature, melting temperature, dropping temperature of the burden sample in each sub-region, and the temperature distribution result in the vertical direction of the blast furnace, comprising:

[0095] Marking the softening start temperature, softening end temperature, melting temperature, and dropping temperature of the burden sample in each sub-region in the temperature distribution result in the vertical direction of the blast furnace to obtain a plurality of temperature marking points;

[0096] Connecting the root position of the softening zone and the plurality of temperature marking points in sequence to obtain the shape and position of the softening zone.

[0097] In actual application, the height of the blast furnace is 5500m 33 For example, in the blast furnace, the mass fraction of sinter is 40%, the mass fraction of pellet is 55%, and the mass fraction of lump ore is 5% in the charging raw material of the blast furnace, wherein the bulk density of the sinter is 1.8t / m 3 , the bulk density of the pellet is 2.2t / m 3 , and the bulk density of the lump ore is 2.0t / m 3 .

[0098] A 1:1 simulation model from the stock bin to the blast furnace throat is established, and the discrete element method modeling software EDEM software is used to calculate the position distribution of the burden particles in the blast furnace throat after passing through the charging belt, the stock bin, and the distribution chute;

[0099] The height of the blast furnace is 5500m 3 There are four cross temperature measuring thermocouples in the circumferential direction of the blast furnace, and there are 7 temperature measuring points on each cross temperature measuring thermocouple. The throat is divided into 28 regions in the circumferential and radial directions, and each region has a thermocouple temperature test result.

[0100] For each sub-region, the mass fraction of each burden in each sub-region is determined according to the number and unit weight of each type of burden particle in the sub-region, and the coke load in each sub-region is obtained.

[0101] The softening start temperature, softening end temperature, melting temperature, and dropping temperature of the burden sample in each sub-region are determined.

[0102] The height of the blast furnace is 5500m3 There are four layers of static pressure holes in the height direction of the blast furnace, and the static pressure values at different height positions can be obtained; meanwhile, there are hot point couples on each section of the cooling wall, and the height direction distribution of the gas temperature is obtained by testing. The root position of the softening zone is determined by the inflection point of the fitting function of the temperature or static pressure of the shaft cooling wall.

[0103] The gas amount of each sub-region is determined, and the temperature distribution result in the vertical direction of the blast furnace is determined based on the gas amount of each sub-region and the heat transfer function between the gas and the furnace charge;

[0104] The shape and position of the softening zone are determined according to the softening start temperature, softening end temperature, melting temperature, and dropping temperature of the furnace charge sample in each sub-region, and the temperature distribution result in the vertical direction of the blast furnace.

[0105] The finally determined shape and position of the softening zone can be shown as indicated by a mark 31 in Figure 3 .

[0106] Based on the same inventive concept as in the foregoing embodiments, the present embodiment also provides a device for determining a softening zone of a blast furnace, as shown in Figure 4 , the device comprises:

[0107] A first determination unit 41 is configured to determine the distribution positions of each furnace charge in the entire blast furnace throat based on a pre-created blast furnace simulation model by using the discrete element method; the blast furnace simulation model is a model from the stock bin to the blast furnace throat;

[0108] A division unit 42 is configured to divide the blast furnace throat region into a plurality of sub-regions based on a preset division strategy;

[0109] A second determination unit 43 is configured to determine the mass fraction of each furnace charge in each sub-region based on the distribution positions of each furnace charge in the entire blast furnace throat and the overall mass fraction of each furnace charge; the furnace charge includes sintered ore, pellet ore, and lump ore;

[0110] A third determination unit 44 is configured to obtain a furnace charge sample by actual sampling and mixing based on the mass fraction of each furnace charge in each sub-region; and determine the softening start temperature, softening end temperature, melting temperature, and dropping temperature of the furnace charge sample in each sub-region;

[0111] A fourth determination unit 45 is configured to determine the root position of the softening zone; determine the gas amount of each sub-region, and determine the temperature distribution result in the vertical direction of the blast furnace based on the gas amount of each sub-region and the heat transfer function between the gas and the furnace charge;

[0112] A fifth determination unit 46 is configured to determine the shape and position of the softening zone according to the softening start temperature, softening end temperature, melting temperature, dropping temperature of the furnace charge sample in each sub-region, the temperature distribution result in the vertical direction of the blast furnace, and the root position of the softening zone.

[0113] In an embodiment, the dividing unit 42 is specifically configured to:

[0114] The position between two adjacent cross temperature measuring points of the blast furnace is taken as a boundary point, and the furnace throat is divided into i annular rings along the radial direction;

[0115] The furnace throat cross section is divided into j main regions with the temperature measuring couple as a marker; the number of the sub-regions is i*j.

[0116] Since the device introduced in the embodiments of the present application is the device used for the method for determining the softening zone of the present application, the specific structure and deformation of the device can be understood by those skilled in the art based on the method introduced in the embodiments of the present application, and thus will not be described here. Any device used by the method of the embodiments of the present application belongs to the scope of the present application.

[0117] Based on the same inventive concept, the present embodiment provides a computer device 500, as shown in the figure, comprising a memory 510, a processor 520, and a computer program 511 stored in the memory 510 and executable on the processor 520, wherein the processor 520 executes the computer program 511 to implement any step of the method described above. Figure 5

[0118] Based on the same inventive concept, the present embodiment provides a computer readable storage medium 600, as shown in the figure, which stores a computer program 611, wherein the computer program 611 is executed by a processor to implement the steps of any method described above. Figure 6

[0119] Through one or more embodiments of the present application, the present application has the following beneficial effects or advantages:

[0120] ​​The application provides a method, device, medium and equipment for determining a softening zone of a blast furnace, the method comprising: determining distribution positions of each charge in the entire blast furnace throat based on a pre-created blast furnace simulation model; the blast furnace simulation model is a model from a stock bin to the blast furnace throat; dividing the blast furnace throat region into a plurality of sub-regions based on a preset division strategy; determining mass fractions of each charge in each sub-region based on the distribution positions of each charge in the entire blast furnace throat and the overall mass fractions of each charge; the charges include sintered ore, pellet ore and lump ore; performing actual sampling and mixing based on the mass fractions of each charge in each sub-region to obtain charge samples; determining softening start temperatures, softening end temperatures, melting temperatures and dripping temperatures of the charge samples in each sub-region; determining a softening zone root position and a gas amount of each sub-region; determining a temperature distribution result in the vertical direction of the blast furnace based on the gas amount of each sub-region and a heat transfer function between the gas and the charges; and determining the shape and position of the softening zone based on the softening start temperatures, the softening end temperatures, the melting temperatures, the dripping temperatures of the charge samples in each sub-region and the temperature distribution result in the vertical direction of the blast furnace; in this way, the structural composition of the ore batch, the influence of the charging and distributing process on the distribution of the charges, the interaction between different charge structures and the heat transfer between the gas and different charges are comprehensively considered, and therefore the accuracy of the shape and position determination of the softening zone in the blast furnace can be improved.

[0121] The algorithms and displays presented herein are not inherently related to any particular computer, virtual system, or other apparatus. Various general purpose systems can be used with programs in accordance with the teachings herein, or it can prove convenient to construct more specialized apparatus to perform the required method steps. The required structure for a variety of these systems will be apparent from the description above. In addition, the present application is not intended to be limited to any particular programming language. It will be appreciated that there are many programming languages that can be used to implement the teachings herein, and any such programming language can be used in connection with the teachings herein.

[0122] In the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application can be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been described in detail in order to not obscure the understanding of this description.

[0123] Similarly, it is to be understood that the embodiments of the present application can be placed into practice notwithstanding modifications to form yet further embodiments of the present application. As such, the terms and expressions of the foregoing description are used solely by way of the example and illustration of the embodiments of the present application and are not carried out, by way of limitation, into the scope of the present application. It is therefore expressly intended that the claims be interpreted as including all embodiments of the present application as fairly and equitably in scope as the following claims.

[0124] Those skilled in the art can appreciate that modules in the apparatus in the embodiments can be adaptively changed and disposed in one or more apparatuses different from the embodiments. The modules or units or components in the embodiments can be combined into one module or unit or component, and further can be divided into multiple sub-modules or sub-units or sub-components. Any combination of all disclosed features in the specification (including accompanying claims, abstract and drawings) and all processes or units of any methods or apparatuses so disclosed can be taken, unless specifically stated otherwise, except for at least some features and / or processes or units being mutually exclusive. Each feature disclosed in the specification (including accompanying claims, abstract and drawings) can be replaced by alternative features serving the same, equivalent or similar purpose, unless specifically stated otherwise.

[0125] Further, those skilled in the art could understand that the combination of features of different embodiments means to be within the scope of the present application and forms different embodiments, although some embodiments herein include certain features rather than others included in other embodiments. For example, in the following claims, any one of the claimed embodiments can be used in any combination.

[0126] The various component embodiments of the present application can be implemented in hardware, or as software modules running in one or more processors, or in combinations thereof. As will be appreciated by one skilled in the art, a microprocessor or digital signal processor (DSP) can be used in practice to implement some or all of the functionality of some or all of the components in the gateway, proxy server, system according to embodiments of the present application. The present application can also be implemented as a program of instructions for performing part or all of the methods described herein, e.g., a computer program and a computer program product. Such program of the present application can be stored on a computer readable medium, or can be in the form of one or more signals. Such signals can be downloaded from an Internet website, or provided on a carrier medium, or in any other form.

[0127] It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that one skilled in the art will be able to design many alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word 'comprising' does not exclude the presence of elements or steps other than those listed in a claim. The word 'a' or 'an' preceding an element does not exclude the presence of a plurality of such elements. The application can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the system claims enumerating several means, several of these means can be embodied by one and the same item of hardware. The use of the word 'at least' followed by a list of one or more items means that any item in the list can be present or there can be more than one of a certain item. The use of the terms 'first','second' and 'third', etc. does not limit the quantity and / or order of those terms. These terms are used to distinguish between two entities or steps involved with the application.

[0128] Although the preferred embodiments of the application have been described, those skilled in the art will be able to make additional changes and modifications thereto without departing from the scope of the application. Accordingly, the appended claims are intended to cover all such changes and modifications that fall within the scope of the application.

[0129] The above-described embodiments are merely preferred embodiments of the present application, but not to confine the protection scope of the present application. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A method for determining the softening zone of a blast furnace, characterized in that, The method includes: Based on a pre-created blast furnace simulation model, the distribution position of each charge within the entire blast furnace throat is determined using the discrete element method; the blast furnace simulation model is a model from the silo to the blast furnace throat. The blast furnace throat area is divided into multiple sub-regions based on a preset partitioning strategy; The mass fraction of each charge in each sub-region is determined based on the distribution position of each charge within the entire blast furnace throat and the overall mass fraction of each charge; the charges include: sintered ore, pellets, and lump ore. Based on the mass fraction of each charge in each sub-region, actual sampling and mixing are performed to obtain charge samples; the softening start temperature, softening end temperature, melting temperature and dripping temperature of the charge samples in each sub-region are determined; Determine the location of the root of the remelting band; The gas volume of each sub-region is determined, and the temperature distribution in the vertical direction of the blast furnace is determined based on the gas volume of each sub-region and the heat transfer function between the gas and the furnace charge. The shape and location of the softening zone are determined based on the softening start temperature, softening end temperature, melting temperature, dripping temperature, temperature distribution along the vertical direction of the blast furnace, and the location of the root of the softening zone in each sub-region; among which... The preset partitioning strategy divides the blast furnace throat region into multiple sub-regions, including: Using the position between two adjacent cross-shaped temperature measuring points in the blast furnace as the boundary point, the area radially along the furnace throat is divided into... i A ring; Using the thermocouple as a marker, the cross-section of the furnace throat is divided into... j One main region; the number of sub-regions is... i * j ; The determination of the mass fraction of each charge within each sub-region based on the distribution position of each charge within the entire blast furnace throat and the overall mass fraction of each charge includes: The types of furnace charge particles falling into the sub-regions, the quantity of each type of furnace charge particle, and the total quantity of each type of furnace charge particle in all regions are counted. The weight of each charge is determined based on the overall mass fraction and total weight of the charge. The unit weight of the corresponding furnace charge particles is determined based on the weight of each furnace charge and the total quantity of each type of furnace charge particles. For each sub-region, the mass fraction of each furnace charge in each sub-region is determined based on the quantity and unit weight of each type of furnace charge particle in the sub-region.

2. The method as described in claim 1, characterized in that, Determining the root location of the remelting strip includes: The temperature of each thermocouple on the furnace cooling wall and the static pressure monitoring value of the furnace body at different elevations were obtained. The temperatures of each thermocouple were fitted to obtain the first fitting curve; the static pressures of each furnace body were fitted to obtain the second fitting curve. The location of the root of the remelting strip is determined based on the inflection point of the first or the second fitted curve.

3. The method as described in claim 1, characterized in that, Determining the gas volume for each sub-region includes: According to the formula Determine the gas volume for each sub-region ;in, The For the first j The first in the main area i The temperature of the cross-shaped temperature measuring point in the sub-region formed by the rings For the first j The first in the main area i The area of ​​the sub-region formed by the annulus, the V This represents the total amount of gas produced in the blast furnace.

4. The method as described in claim 1, characterized in that, The shape and location of the softening zone are determined based on the softening start temperature, softening end temperature, melting temperature, dripping temperature, and temperature distribution along the vertical direction of the blast furnace for the furnace charge samples in each sub-region. The softening start temperature, softening end temperature, melting temperature and dripping temperature of the furnace charge sample in each sub-region are marked in the temperature distribution results in the vertical direction of the blast furnace to obtain multiple temperature marking points. By connecting multiple temperature markers in sequence, the shape and position of the softening zone can be obtained.

5. An apparatus for determining the softening zone of a blast furnace, characterized in that, The device includes: The first determining unit is used to determine the distribution position of each charge within the entire blast furnace throat based on a pre-created blast furnace simulation model using the discrete element method; the blast furnace simulation model is a model from the silo to the blast furnace throat. The partitioning unit is used to divide the blast furnace throat area into multiple sub-regions based on a preset partitioning strategy; The second determining unit is used to determine the mass fraction of each charge in each sub-region based on the distribution position of each charge within the entire blast furnace throat and the overall mass fraction of each charge; the charges include: sintered ore, pellets and lump ore. The third determining unit is used to perform actual sampling and mixing based on the mass fraction of each charge in each sub-region to obtain a charge sample; and to determine the softening start temperature, softening end temperature, melting temperature and dripping temperature of the charge sample in each sub-region. The fourth determining unit is used to determine the root position of the softening zone; determine the gas volume of each sub-region; and determine the temperature distribution in the vertical direction of the blast furnace based on the gas volume of each sub-region and the heat transfer function between the gas and the furnace charge. The fifth determining unit is used to determine the shape and location of the softening zone based on the softening start temperature, softening end temperature, melting temperature, dripping temperature, temperature distribution in the vertical direction of the blast furnace, and the location of the root of the softening zone of the charge sample in each sub-region; wherein, The preset partitioning strategy divides the blast furnace throat region into multiple sub-regions, including: Using the position between two adjacent cross-shaped temperature measuring points in the blast furnace as the boundary point, the area radially along the furnace throat is divided into... i A ring; Using the thermocouple as a marker, the cross-section of the furnace throat is divided into... j One main region; the number of sub-regions is... i * j ; The determination of the mass fraction of each charge within each sub-region based on the distribution position of each charge within the entire blast furnace throat and the overall mass fraction of each charge includes: The types of furnace charge particles falling into the sub-regions, the quantity of each type of furnace charge particle, and the total quantity of each type of furnace charge particle in all regions are counted. The weight of each charge is determined based on the overall mass fraction and total weight of the charge. The unit weight of the corresponding furnace charge particles is determined based on the weight of each furnace charge and the total quantity of each type of furnace charge particles. For each sub-region, the mass fraction of each furnace charge in each sub-region is determined based on the quantity and unit weight of each type of furnace charge particle in the sub-region.

6. The apparatus as claimed in claim 5, characterized in that, The partitioning unit is specifically used for: Using the position between two adjacent cross-shaped temperature measuring points in the blast furnace as the boundary point, the area radially along the furnace throat is divided into... i A ring; Using the thermocouple as a marker, the cross-section of the furnace throat is divided into... j One main region; the number of sub-regions is... i * j .

7. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by a processor, the program implements the steps of the method according to any one of claims 1-4.

8. A computer device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the steps of the method according to any one of claims 1-4.

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