Method, device and equipment for controlling thermal load stability of blast furnace and medium

Abstract

The invention discloses a blast furnace thermal load stability control method, device, equipment and medium, and the method comprises the steps that outer-layer gear distribution parameters and annular-belt gear distribution parameters of furnace charge of a blast furnace are obtained, and each of the outer-layer gear distribution parameters and the annular-belt gear distribution parameters comprises a plurality of distribution gears; each material distribution gear corresponds to a furnace material distribution angle and a furnace material distribution turn number; based on the outer-layer gear distribution parameters, outer-layer gear distribution is conducted on the blast furnace in the direction from outside to inside, the distribution angle of outer-layer gear distribution is larger than a first preset angle, and the difference value of the distribution angles of the adjacent distribution gears in outer-layer gear distribution is within a first angle difference range; on the basis of the annulus gear material distribution parameters, annulus gear material distribution is conducted on the blast furnace, the material distribution angle of the annulus gear material distribution is between the first preset angle and the second preset angle, and the difference value of the material distribution angles of the adjacent material distribution gears in the annulus gear material distribution is within the second angle difference range; the second preset angle is smaller than the first preset angle, and the first angular difference range is smaller than the second angular difference range. The method can improve the thermal load stability of the blast furnace.

Description

Technical Field

[0001] The present invention relates to the technical field of blast furnace ironmaking, and in particular to a control method, device, equipment and medium for blast furnace thermal load stability. Background Art

[0002] In the long process of steel production, blast furnace ironmaking is a major energy consumer and a key process for carbon dioxide emissions. Improving the production stability of the blast furnace ironmaking process and reducing the fuel consumption of blast furnace ironmaking are important measures to achieve high-quality, green and low-carbon blast furnace ironmaking.

[0003] During the blast furnace smelting process, the stability of the blast furnace heat load is an important factor affecting the blast furnace fuel consumption. When the blast furnace heat load fluctuates and increases, the gas flow capacity decreases, and the iron-containing ore is not heated and reduced enough in the indirect reduction area, resulting in an increase in the blast furnace fuel ratio. When the blast furnace heat load is in a state of large fluctuations and increases for a long time, it causes material collapse, and it is very easy to have vicious furnace conditions such as pipelines and suspended materials, which brings difficulties to blast furnace smelting and a sharp increase in fuel consumption.

[0004] Compared with small-volume blast furnaces, large blast furnaces with a capacity of more than 4,000 cubic meters have a higher material column, and use a larger air volume and larger ore batches during the smelting process. The above conditions make it more difficult to control the heat load of large blast furnaces. Therefore, finding an efficient smelting method to improve the stability of the heat load of large blast furnaces has become a key measure to reduce smelting fuel consumption and carbon dioxide emissions in large blast furnaces. Summary of the invention

[0005] The embodiments of the present application provide a control method, device, equipment and medium for the thermal load stability of a blast furnace. The distribution method can effectively adjust the distribution of coal gas in the blast furnace, improve the thermal load stability of the blast furnace, and stabilize and improve the utilization efficiency of coal gas.

[0006] In a first aspect, the present invention provides the following technical solution through an embodiment of the present invention:

[0007] A method for controlling blast furnace heat load stability, comprising:

[0008] Obtain outer gear distribution parameters and endless belt distribution parameters of the charge of the blast furnace, wherein the outer gear distribution parameters and the endless belt distribution parameters both include a plurality of distribution gears, and each distribution gear corresponds to a charge distribution angle and a charge distribution circle number; based on the outer gear distribution parameters, the blast furnace is distributed in the outer gear from the outside to the inside, wherein the distribution angle of the outer gear distribution is greater than a first preset angle, and the difference in distribution angles of adjacent distribution gears in the outer gear distribution is within a first angle difference. Within the range, the area of ​​the outer gear distribution is the outer ring of the blast furnace; based on the ring-belt gear distribution parameters, the blast furnace is subjected to ring-belt gear distribution, wherein the distribution angle of the ring-belt gear distribution is between the first preset angle and the second preset angle, and the difference in distribution angles of adjacent distribution gears in the ring-belt gear distribution is within the second angular difference range, and the area of ​​the ring-belt gear distribution is the inner ring of the blast furnace; the second preset angle is smaller than the first preset angle, and the first angular difference range is smaller than the second angular difference range.

[0009] Preferably, after the outer gear distribution of the blast furnace, it also includes: monitoring the batch weight of the charge, if the batch weight of the charge is greater than the preset batch weight, determining the distribution weighted angle based on the charge batch weight and the first preset calculation model; based on the distribution weighted angle and the second preset calculation model, optimizing at least one of the following distribution gear parameters, the distribution gear parameters including the distribution angle of a single or multiple gears among all distribution gears, the number of distribution turns of a single or multiple gears among all distribution gears, and the total number of distribution turns; based on the optimization result, adjusting the distribution gear in the outer gear distribution, and / or adjusting the distribution gear in the endless belt gear distribution.

[0010] Preferably, the first preset calculation model includes a calculation coefficient, and the calculation coefficient is determined by the following steps: obtaining a quality index of the charge; and determining the calculation coefficient based on the quality index.

[0011] Preferably, the first angle difference ranges from 1 to 1.5°, and the second angle difference ranges from 2 to 2.5°.

[0012] Preferably, after the blast furnace is subjected to the ring belt gear distribution including multiple distribution gears, it further includes: judging whether the ore batch in the blast furnace is greater than the preset batch weight, and if so, adjusting the initial coal gas key parameter of the blast furnace within the target temperature range, wherein the initial coal gas key parameter is the product of the air supply ratio of the blast furnace and the theoretical combustion temperature. Preferably, the target temperature range is 3300-3400℃ / min.

[0013] Preferably, after the blast furnace is charged with a plurality of charging gears in an annular belt gear, the method further includes: obtaining the center temperature of the furnace bottom and the secondary center temperature of the furnace bottom of the blast furnace; determining the furnace hearth activity change rate based on the furnace bottom center temperature and the secondary center temperature of the furnace bottom; and adjusting the magnesium-aluminum ratio in the slag of the blast furnace based on the furnace hearth activity change rate.

[0014] In a second aspect, the present invention provides the following technical solution through an embodiment of the present invention:

[0015] A control device for blast furnace thermal load stability, comprising:

[0016] An acquisition module is used to acquire the outer gear distribution parameters and the endless belt distribution parameters of the charge of the blast furnace, wherein the outer gear distribution parameters and the endless belt distribution parameters each include a plurality of distribution gears, and each distribution gear corresponds to a charge distribution angle and a charge distribution circle number;

[0017] A first distribution module is used for distributing the outer gear distribution to the blast furnace from the outside to the inside based on the outer gear distribution parameters, wherein the distribution angle of the outer gear distribution is greater than a first preset angle, and the difference in distribution angles of adjacent distribution gears in the outer gear distribution is within a first angle difference range, and the area of ​​the outer gear distribution is the outer ring of the blast furnace;

[0018] A second feeding module is used to perform ring-belt gear feeding for the blast furnace based on the ring-belt gear feeding parameters, wherein the feeding angle of the ring-belt gear feeding is between the first preset angle and the second preset angle, and the difference in feeding angles of adjacent feeding gears in the ring-belt gear feeding is within a second angular difference range, and the area of ​​the ring-belt gear feeding is the inner ring of the blast furnace; the second preset angle is smaller than the first preset angle, and the first angular difference range is smaller than the second angular difference range.

[0019] In a third aspect, the present invention provides the following technical solution through an embodiment of the present invention:

[0020] An electronic device comprises: a memory, a processor and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, the steps of any one of the methods described in the first aspect are implemented.

[0021] In a fourth aspect, the present invention provides the following technical solution through an embodiment of the present invention:

[0022] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the steps of any one of the methods described in the first aspect.

[0023] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0024] The control method for the thermal load stability of a blast furnace provided by an embodiment of the present invention divides the charge distributing position into outer gear distribution and annular belt distribution during the charge distributing process, so that the distribution angle of the outer gear distribution gradually decreases to the annular belt distribution, and the difference in distribution angles of adjacent distribution gears in the outer gear distribution is controlled to be within a first angular difference range, and the difference in distribution angles of adjacent distribution gears in the annular belt distribution is controlled to be within a second angular difference range, and the first angular difference range is smaller than the second angular difference range. By setting the difference in distribution angle of the outer gear distribution to be smaller, it is used to stabilize the gas at the edge of the blast furnace and avoid the blast furnace edge effect, and by setting the difference in distribution angle of the annular belt distribution to be larger, it is possible to take into account the air permeability while making the annular belt area the main reaction area of ​​the gas so that the gas can fully react with the charge. Therefore, the use of the control method provided in the present application not only helps to improve the gas flow capacity of the blast furnace during the intensified smelting process and enhance the reduction efficiency of the charge (such as iron ore), but also reduces the blast furnace smelting fuel consumption and helps to promote blast furnace ironmaking to reduce carbon dioxide emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0026] Figure 1 Flow chart of a method for controlling blast furnace thermal load stability in an embodiment of the present invention;

[0027] Figure 2 Schematic diagram of the structure of a control device for blast furnace thermal load stability in an embodiment of the present invention;

[0028] Figure 3 Schematic diagram of the structure of an electronic device in an embodiment of the present invention. DETAILED DESCRIPTION

[0029] The embodiments of the present application provide a control method, device, equipment and medium for the thermal load stability of a blast furnace. The distribution method can effectively adjust the distribution of coal gas in the blast furnace, improve the thermal load stability of the blast furnace, and stabilize and improve the utilization efficiency of coal gas.

[0030] The technical solution of the embodiment of the present application is to solve the above technical problems, and the overall idea is as follows:

[0031] A control method for the thermal load stability of a blast furnace comprises: obtaining outer gear distribution parameters and ring belt distribution parameters of the charge of the blast furnace, wherein the outer gear distribution parameters and the ring belt distribution parameters both include a plurality of distribution gears, and each distribution gear corresponds to a charge distribution angle and a charge distribution circle number; a first distribution module is used to distribute the charge of the blast furnace to the outer gear in a direction from outside to inside based on the outer gear distribution parameters, wherein the distribution angle of the outer gear distribution is greater than a first preset angle, and adjacent distributions in the outer gear distribution are The difference in the distribution angles of the gears is within the first angular difference range, and the area for the outer gear distribution is the outer ring of the blast furnace; the second distribution module is used to perform ring-belt gear distribution on the blast furnace based on the ring-belt gear distribution parameters, wherein the distribution angle of the ring-belt gear distribution is between the first preset angle and the second preset angle, and the difference in the distribution angles of adjacent distribution gears in the ring-belt gear distribution is within the second angular difference range, and the area for the ring-belt gear distribution is the inner ring of the blast furnace; the second preset angle is smaller than the first preset angle, and the first angular difference range is smaller than the second angular difference range.

[0032] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0033] In a first aspect, an embodiment of the present invention provides a method for controlling the thermal load stability of a blast furnace. Specifically, Figure 1 As shown, the method includes the following steps S101 to S103:

[0034] Step S101, obtaining the outer gear distribution parameters and the endless belt distribution parameters of the charge of the blast furnace, wherein the outer gear distribution parameters and the endless belt distribution parameters both include a plurality of distribution gears, and each distribution gear corresponds to a charge distribution angle and a charge distribution circle number;

[0035] Step S102, based on the outer gear distribution parameters, the outer gear distribution of the blast furnace is carried out in the direction from outside to inside, wherein the distribution angle of the outer gear distribution is greater than the first preset angle, and the difference in distribution angles of adjacent distribution gears in the outer gear distribution is within the first angle difference range, and the area of ​​the outer gear distribution is the outer ring of the blast furnace.

[0036] Step S103, based on the ring-belt gear distribution parameters, the ring-belt gear distribution is performed on the blast furnace, wherein the distribution angle of the ring-belt gear distribution is between the first preset angle and the second preset angle, and the difference in distribution angles of adjacent distribution gears in the ring-belt gear distribution is within a second angular difference range, and the area of ​​the ring-belt gear distribution is the inner ring of the blast furnace; the second preset angle is smaller than the first preset angle, and the first angular difference range is smaller than the second angular difference range.

[0037] It should be noted that the blast furnace applicable to the present application can be a large blast furnace with a capacity of more than 4,000 cubic meters. The charge material is ore, coke, etc. The ore batch is larger than the preset batch weight (for example, 175t / batch). The outer ring of the blast furnace refers to the outermost ore or coke landing point, and the inner ring of the blast furnace refers to the part close to the center of the blast furnace. For ease of understanding, this application takes ore as an example for explanation.

[0038] In the specific implementation process, according to the difference in ore distribution position, the characteristic ore distribution is divided into outer gear distribution and ring gear distribution. The distribution angle greater than the first preset angle is defined as ore outer gear distribution, and the distribution angle between the first preset angle and the second preset angle is defined as ore ring gear distribution.

[0039] In order to improve the distribution of coal gas, optionally, the first preset angle here can be 39°, and the second preset angle can be 33°, so that in the process of distributing the charge, the blast furnace can be distributed to the outer gear first according to the preset distribution matrix, from the outer ring of the blast furnace to the center, and after the outer gear distribution is completed, the blast furnace can be distributed to the ring belt gear.

[0040] The preset cloth matrix may be established according to empirical data or past data, and the preset cloth matrix includes a plurality of cloth angles and the number of cloth circles corresponding to each cloth angle, and one cloth angle corresponds to one gear.

[0041] In order to achieve the effect of stabilizing the edge gas in the outer layer of the blast furnace and allowing the gas to fully react with the ore, the difference in the feeding angles of adjacent feeding gears in the outer gear is controlled to be smaller than the difference in the feeding angles of adjacent feeding gears in the ring belt gear. This can prevent the gas from escaping with the edge of the blast furnace container and avoid the reaction of the gas and ore being affected by the incorrect feeding position of the outer ore. The feeding angle difference of adjacent feeding gears in the ring belt is set to be larger, so that the ring belt area serves as the main reaction area between the ore and the gas, while taking into account the permeability.

[0042] Specifically, for the characteristic distribution of large ore batches, the first angle difference range may be 1 to 1.5°, and the second angle difference range may be 2 to 2.5°.

[0043] Furthermore, in order to improve the problem of ore distribution position under different ore batch weights, so that the ore distribution matrix can be optimized according to the ore batch weight, after the outer gear distribution of the blast furnace including multiple distribution gears is carried out, it also includes: monitoring the batch weight of the charge, if the batch weight of the charge is greater than the preset batch weight, determining the distribution weighted angle based on the charge batch weight and the first preset calculation model; based on the distribution weighted angle and the second preset calculation model, optimizing at least one of the following distribution gear parameters, the distribution gear parameters including the distribution angle of a single or multiple gears among all distribution gears, the number of distribution circles of a single or multiple gears among all distribution gears, and the total number of distribution circles.

[0044] Specifically, the preset batch weight may be 170-185 t / batch, for example, 175 t / batch. In one embodiment, the first preset calculation model may include a calculation coefficient, and the calculation coefficient is determined by the following steps: obtaining a quality index of the charge; and determining the calculation coefficient based on the quality index.

[0045] Specifically, the quality index of the ore (e.g., particle size, performance, etc.) is determined. If the quality index is good (e.g., the particle size is large and the performance is good), the calculation coefficient is determined to be the first calculation coefficient. If the quality index is poor (e.g., the particle size is small and the performance is poor), the calculation coefficient is determined to be the second calculation coefficient. Optionally, the first calculation coefficient can be 0.15 and the second calculation coefficient can be 0.17.

[0046] In a specific embodiment, determining the weighted angle of material distribution based on the batch weight of charge and a first preset calculation model may include: substituting the batch weight of charge into the first preset calculation model α=(P-175)×B+36.0 to determine the weighted angle of material distribution, wherein α is the weighted angle of material distribution, p is the batch weight of charge, and B is the calculation coefficient.

[0047] Of course, as another optional embodiment, the calculation coefficient is not adjusted according to the quality index of the charge, and the calculation coefficient is a fixed value, for example: 0.15, 0.16 or 0.17.

[0048] Next, based on the cloth weighted angle and the second preset calculation model, optimizing at least one parameter of the cloth gear parameters may include: bringing the cloth weighted angle into the second preset calculation model α=(∑α i ×R i ) / R 总 In the process, at least one parameter of the cloth gear parameters is optimized, where α is the cloth weighted angle, α i is the fabric angle of all fabric positions, R i is the number of fabric circles in all fabric gears, R 总 is the total number of ore distribution circles. The total number of ore distribution circles is the sum of the distribution circles of all distribution gears.

[0049] According to the second preset calculation model, when the weighted distribution angle α changes, the distribution angle of a single or multiple distribution gears among all distribution gears, the number of distribution circles of a single or multiple distribution gears among all distribution gears, or the total number of ore distribution circles are adjusted accordingly so that the equation holds true.

[0050] For example, assuming that the ore distribution matrix is ​​as shown in Table 1 below, the ore angle at gear 1 is α 1 , the number of ore circles is R 1 , the ore angle in gear 2 is α 2 , the number of ore circles is R 2 , the ore angle in gear 3 is α 3 , the number of ore circles is R 3 , and so on, then α=(∑(α 1 ×R 1 , α 2 ×R 2 , α 3 ×R 3 ,…)) / R total.

[0051] Table 1

[0052]

[0053] Bring the data in the cloth matrix into the model, then α=(∑(43×3,42×4,40.5×4,…)) / R 总 , in order to make the equation still hold after the cloth weighted angle changes, for example, the single cloth angle in all cloth gears in the cloth gear parameters can be optimized separately, such as optimizing α 1 , α 1 It can be 42.5, 43.5, etc., or you can optimize the number of cloth turns in all cloth gears in the cloth gear parameters separately, such as optimizing R 1 and R 2 , R 1 is 4, R 2 is 3, or, the multiple cloth turns and the multiple cloth turns in all cloth gears in the cloth gear parameters are optimized, and so on. The specific adjustments can be made according to actual conditions.

[0054] Among them, if the number of cloth turns of one or more cloth gears in all cloth gears changes, the total number of cloth turns may be optimized. If only the cloth angle of one or more gears in all cloth gears changes, the total number of cloth turns remains unchanged.

[0055] Next, based on the optimization result, the fabric gear position of the outer layer gear fabric is adjusted, and / or the fabric gear position of the endless belt gear fabric is adjusted.

[0056] Furthermore, in order to stabilize the initial distribution of coal gas and improve the thermal load stability of large blast furnaces, after the blast furnace is charged with a ring belt gear including multiple charging gears, it can also include: judging whether the ore batch in the blast furnace is greater than the preset batch weight, and if so, adjusting the initial coal gas key parameters of the blast furnace within the target temperature range, wherein the initial coal gas key parameter K is the product of the blast furnace's air supply ratio and the theoretical combustion temperature.

[0057] Among them, the key parameters of initial coal gas can be parameters such as the air volume entering the furnace, the oxygen enrichment rate of the blast furnace and the coal injection ratio. Here, the air supply ratio of the blast furnace = the air volume entering the furnace / the effective volume of the blast furnace. The air supply ratio of the blast furnace can be determined by adjusting the air volume entering the furnace. The theoretical combustion temperature refers to the maximum temperature that the combustion products can reach before the blast furnace tuyere, assuming that the fuel is completely burned and there is no heat dissipation. By adjusting the conditions such as the oxygen enrichment rate and the coal injection ratio of the blast furnace, the theoretical combustion temperature of the blast furnace can be determined. Then, by adjusting the air supply ratio of the blast furnace and the theoretical combustion temperature of the blast furnace, the key parameter K of the initial coal gas is within the target temperature range, thereby stabilizing the initial distribution of the coal gas.

[0058] Specifically, the preset batch weight may be 175 t / batch, and the target temperature range may be 3300-3400° C. / min.

[0059] Furthermore, in order to improve the thermal load stability of a large blast furnace, after the blast furnace is charged with a plurality of charging gears in an annular belt gear, it can also include: obtaining the center temperature of the furnace bottom and the secondary center temperature of the furnace bottom of the blast furnace; based on the center temperature of the furnace bottom and the secondary center temperature of the furnace bottom, determining the furnace hearth activity change rate; based on the furnace hearth activity change rate, adjusting the magnesium-aluminum ratio in the slag of the blast furnace.

[0060] The secondary center of the furnace bottom may be any area within a radius of 1.5 to 2 m from the center of the furnace bottom, which are all secondary center areas of the furnace bottom.

[0061] In a specific embodiment, based on the furnace bottom center temperature and the furnace bottom secondary center temperature, determining the furnace hearth activity change rate may include: subtracting the furnace bottom center temperature from the furnace bottom secondary center temperature, and then dividing by the furnace bottom center temperature to determine the furnace hearth activity change rate. This method can improve the sensitivity of the furnace hearth activity change rate detection, avoid the hysteresis of the detected furnace bottom center temperature, so that timely response can be made, and the thermal load stability of the blast furnace can be improved.

[0062] Specifically, the furnace activity change rate is defined as Δ = (T 中心 -T 次中心 ) / T 中心 , T 中心 is the center temperature of the blast furnace bottom, T 次中 It is the secondary center temperature of the blast furnace bottom.

[0063] In a specific embodiment, adjusting the magnesium-aluminum ratio in the slag of the blast furnace based on the hearth activity change rate may include: if the hearth activity change rate increases by one gradient, the magnesium-aluminum ratio in the slag of the blast furnace is increased by one ratio gradient. Thus, the blast furnace slag system composition is adjusted according to the hearth activity change rate, and the thermal load stability of the large blast furnace is improved.

[0064] For example, a gradient may be 0.01, and a ratio gradient may be between 0.03 and 0.05, such as a ratio gradient of 0.04.

[0065] The control method proposed in this application is described in detail below with reference to specific embodiments:

[0066] The capacity of a large blast furnace is 5500 cubic meters. The blast furnace adopts bell-less multi-ring charging. The ore characteristic charging method to improve the thermal load stability of the blast furnace uses an ore charging matrix as shown in Table 1.

[0067] In the ore distribution matrix used in the characteristic distribution method for improving the thermal load stability of the blast furnace, the ore outer gear angle difference greater than 39° is controlled as follows: the angle difference between gear 1 and gear 2 is 1°, and the angle difference between gear 2 and gear 3 is 1.5°. The distribution angle between 39° and 33° is ore ring gear distribution, and the ore angle difference is controlled to be: 2-2.5°, that is, the angle difference between gear 4 and gear 5 is 2.5°, and the angle difference between gear 5 and gear 6 is 2.5°.

[0068] When the ore batch weight is 185 tons / batch, the ore distribution weighting angle α is controlled to be 37.8° in the characteristic distribution method for improving the thermal load stability of the blast furnace.

[0069] During the initial gas distribution control process to improve the thermal load stability of the blast furnace, the blast furnace air volume was 8300m 3 / min, and the blast furnace air supply ratio is 1.51. By adjusting the blast furnace oxygen enrichment rate and coal injection ratio and other conditions, the blast furnace theoretical combustion temperature is determined to be 2210℃, and the product of the super-large blast furnace air supply ratio and the theoretical combustion temperature is controlled to be 3337℃ / min.

[0070] In the process of improving the thermal load stability of the blast furnace, the center temperature and sub-center temperature of the blast furnace bottom are continuously monitored and recorded. For example, when the obtained hearth activity change rate increases from 0.01 to 0.02, the magnesium-aluminum ratio in the blast furnace slag is correspondingly increased by 0.03.

[0071] After adopting the above-mentioned operating method for improving the stability of blast furnace heat load, under the condition that the water volume of blast furnace cooling wall remains unchanged, the temperature difference of blast furnace cooling water is reduced from 5.2℃ to 3.7℃, and the blast furnace heat load is reduced from 169GJ / h to 121GJ / h.

[0072] Therefore, this application aims at the process characteristics of intensified smelting in large blast furnaces, and through methods such as blast furnace charging system, initial gas distribution control and blast furnace hearth activity regulation, it is achieved that the stability of blast furnace heat load is improved under the conditions of changing smelting parameters such as large ore batch weight, high air volume and high oxygen enrichment in large blast furnaces. It can stabilize and improve gas utilization efficiency, reduce blast furnace fuel consumption, and also effectively reduce carbon dioxide emissions per ton of iron.

[0073] In summary, a control method for blast furnace heat load stability provided by an embodiment of the present invention can effectively adjust the distribution of coal gas in the blast furnace, improve the stability of blast furnace heat load, stabilize and improve coal gas utilization efficiency. This control method not only helps to improve the gas flow capacity of super-large blast furnaces during the enhanced smelting process and enhance the reduction efficiency of iron-containing ore, but also achieves the beneficial effect of reducing the fuel consumption of large blast furnace smelting, and helps to promote large blast furnace ironmaking to reduce carbon dioxide emissions.

[0074] In the second aspect, based on the same inventive concept, this embodiment provides a control device for blast furnace thermal load stability, such as Figure 2 As shown, including:

[0075] An acquisition module 401 is used to acquire the outer gear distribution parameters and the endless belt distribution parameters of the charge of the blast furnace, wherein the outer gear distribution parameters and the endless belt distribution parameters each include a plurality of distribution gears, and each distribution gear corresponds to a charge distribution angle and a number of charge distribution circles;

[0076] The first distribution module 402 is used to distribute the outer gear of the blast furnace from the outside to the inside based on the outer gear distribution parameters, wherein the distribution angle of the outer gear distribution is greater than the first preset angle, and the difference in distribution angles of adjacent distribution gears in the outer gear distribution is within the first angle difference range, and the area of ​​the outer gear distribution is the outer ring of the blast furnace;

[0077] The second feeding module 403 is used to perform ring-belt gear feeding for the blast furnace based on the ring-belt gear feeding parameters, wherein the feeding angle of the ring-belt gear feeding is between the first preset angle and the second preset angle, and the difference in feeding angles of adjacent feeding gears in the ring-belt gear feeding is within a second angular difference range, and the area of ​​the ring-belt gear feeding is the inner ring of the blast furnace; the second preset angle is smaller than the first preset angle, and the first angular difference range is smaller than the second angular difference range.

[0078] As an optional embodiment, the device further includes:

[0079] The distribution gear optimization module is used to monitor the batch weight of the charge. If the batch weight of the charge is greater than the preset batch weight, the distribution weighted angle is determined based on the charge batch weight and the first preset calculation model; based on the distribution weighted angle and the second preset calculation model, at least one of the following distribution gear parameters is optimized, the distribution gear parameters including the distribution angle of a single or multiple gears among all distribution gears, the number of distribution turns of a single or multiple gears among all distribution gears, and the total number of distribution turns; based on the optimization result, the distribution gear in the outer gear distribution is adjusted, and / or the distribution gear in the endless belt gear distribution is adjusted.

[0080] As an optional embodiment, the first preset calculation model includes a calculation coefficient, and the calculation coefficient is determined by the following steps: obtaining a quality index of the charge; and determining the calculation coefficient based on the quality index.

[0081] As an optional embodiment, the first angle difference range is 1 to 1.5°, and the second angle difference range is 2 to 2.5°.

[0082] As an optional embodiment, the device also includes: a parameter adjustment module, used to determine whether the ore batch in the blast furnace is greater than a preset batch weight. If so, the initial coal gas key parameters of the blast furnace are adjusted within the target temperature range, wherein the initial coal gas key parameters are the product of the blast furnace's air supply ratio and the theoretical combustion temperature.

[0083] As an optional embodiment, the target temperature range is 3300-3400° C. / min.

[0084] As an optional embodiment, the device also includes: a magnesium-aluminum ratio adjustment module, which is used to obtain the center temperature of the furnace bottom and the secondary center temperature of the furnace bottom of the blast furnace; based on the center temperature of the furnace bottom and the secondary center temperature of the furnace bottom, determine the furnace hearth activity change rate; based on the furnace hearth activity change rate, adjust the magnesium-aluminum ratio in the slag of the blast furnace.

[0085] The above modules can be implemented by software codes, in which case, the above modules can be stored in the memory of the control device. The above modules can also be implemented by hardware such as integrated circuit chips.

[0086] The embodiment of the present invention provides a control device for the thermal load stability of a blast furnace, and its implementation principle and technical effects are the same as those of the aforementioned method embodiment. For the sake of brief description, for matters not mentioned in the device embodiment, reference may be made to the corresponding contents in the aforementioned method embodiment.

[0087] In a third aspect, based on the same inventive concept, this embodiment provides an electronic device 500, such as Figure 3As shown, it includes: a memory 501, a processor 502 and a computer program 503 stored in the memory and executable on the processor. When the processor 502 executes the program, the steps of the control method for improving the thermal load stability of the blast furnace described in the first aspect are implemented.

[0088] Since the electronic device introduced in this embodiment is an electronic device used to implement the control method in the embodiment of the present application, based on the control method introduced in the embodiment of the present application, a person skilled in the art can understand the specific implementation of the electronic device of the present embodiment and its various variations, so how the electronic device implements the method in the embodiment of the present application is not described in detail here. As long as a person skilled in the art implements the electronic device used in the control method in the embodiment of the present application, it belongs to the scope of protection of this application.

[0089] Those skilled in the art will appreciate that embodiments of the present invention may be provided as methods, systems, or computer program products. Therefore, the present invention may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0090] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowchart and / or block diagram, as well as the combination of processes and / or blocks in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A module that specifies functions in one or more boxes.

[0091] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a manufactured product including an instruction module, which is implemented in the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0092] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0093] Although the preferred embodiments of the present invention have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications that fall within the scope of the present invention.

[0094] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A method for controlling the thermal load stability of a blast furnace, characterized in that: include: Obtaining outer gear distribution parameters and endless belt distribution parameters of the charge of the blast furnace, wherein the outer gear distribution parameters and the endless belt distribution parameters both include a plurality of distribution gears, and each distribution gear corresponds to a charge distribution angle and a number of charge distribution circles; Based on the outer gear distribution parameters, the outer gear distribution is performed on the blast furnace in a direction from outside to inside, wherein the distribution angle of the outer gear distribution is greater than a first preset angle, and the difference in distribution angles of adjacent distribution gears in the outer gear distribution is within a first angle difference range, and the area of ​​the outer gear distribution is the outer ring of the blast furnace; Based on the ring-belt gear distribution parameters, the blast furnace is subjected to ring-belt gear distribution, wherein the distribution angle of the ring-belt gear distribution is between the first preset angle and the second preset angle, and the difference in distribution angles of adjacent distribution gears in the ring-belt gear distribution is within a second angular difference range, and the area of ​​the ring-belt gear distribution is the inner ring of the blast furnace; the second preset angle is smaller than the first preset angle, and the first angular difference range is smaller than the second angular difference range.

2. The method according to claim 1, characterized in that After the outer gear distribution is performed on the blast furnace, the method further comprises: Monitoring the batch weight of the charge, and if the batch weight of the charge is greater than a preset batch weight, determining a weighted angle of charge distribution based on the batch weight of the charge and a first preset calculation model; Based on the weighted cloth angle and the second preset calculation model, at least one parameter of the following cloth gear parameters is optimized, wherein the cloth gear parameters include cloth angles of one or more cloth gears among all cloth gears, the number of cloth turns of one or more cloth gears among all cloth gears, and the total number of cloth turns; Based on the optimization result, the fabric gear position of the outer layer gear fabric is adjusted, and / or the fabric gear position of the endless belt gear fabric is adjusted.

3. The method according to claim 2, characterized in that The first preset calculation model includes calculation coefficients, and the calculation coefficients are determined by the following steps: Obtaining quality indicators of the charge; Based on the quality indicator, the calculation coefficient is determined.

4. The method according to claim 1, characterized in that The first angle difference ranges from 1 to 1.5°, and the second angle difference ranges from 2 to 2.5°.

5. The method according to claim 1, characterized in that After the blast furnace is subjected to endless belt gear distribution, the method further comprises: Determine whether the ore batch in the blast furnace is greater than the preset batch weight. If so, adjust the initial coal gas key parameter of the blast furnace within the target temperature range, wherein the initial coal gas key parameter is the product of the blast furnace's air supply ratio and the theoretical combustion temperature.

6. The method according to claim 5, characterized in that The target temperature range is 3300-3400°C / min.

7. The method according to claim 1, characterized in that After the blast furnace is subjected to the endless belt gear distribution including a plurality of gear distribution gears, the method further comprises: Obtaining the center temperature of the furnace bottom of the blast furnace and the secondary center temperature of the furnace bottom of the blast furnace; Determining a furnace cylinder activity change rate based on the furnace bottom center temperature and the furnace bottom sub-center temperature; Based on the hearth activity change rate, the magnesium-aluminum ratio in the slag of the blast furnace is adjusted.

8. A control device for blast furnace thermal load stability, characterized in that: include: An acquisition module is used to acquire the outer gear distribution parameters and the endless belt distribution parameters of the charge of the blast furnace, wherein the outer gear distribution parameters and the endless belt distribution parameters each include a plurality of distribution gears, and each distribution gear corresponds to a charge distribution angle and a charge distribution circle number; A first distribution module is used for distributing the outer gear distribution to the blast furnace from the outside to the inside based on the outer gear distribution parameters, wherein the distribution angle of the outer gear distribution is greater than a first preset angle, and the difference in distribution angles of adjacent distribution gears in the outer gear distribution is within a first angle difference range, and the area of ​​the outer gear distribution is the outer ring of the blast furnace; A second feeding module is used to perform ring-belt gear feeding for the blast furnace based on the ring-belt gear feeding parameters, wherein the feeding angle of the ring-belt gear feeding is between the first preset angle and the second preset angle, and the difference in feeding angles of adjacent feeding gears in the ring-belt gear feeding is within a second angular difference range, and the area of ​​the ring-belt gear feeding is the inner ring of the blast furnace; the second preset angle is smaller than the first preset angle, and the first angular difference range is smaller than the second angular difference range.

9. An electronic device, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the method according to any one of claims 1 to 7 when executing the program.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method described in any one of claims 1 to 7 are implemented.

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