Determination method and device for deviation rectification of target blast furnace charge level in air supply state

Abstract

The invention discloses a method and device for determining target blast furnace burden surface deviation rectification in an air supply state, and belongs to the technical field of target blast furnace smelting, the method for determining target blast furnace burden surface deviation rectification in the air supply state comprises the steps that at least one target area in a target blast furnace is determined based on temperature data of all areas in the target blast furnace to be detected; for any target area, based on the first coal injection variable quantity under the target area, the temperature difference between the target temperature data of the target area and the temperature data of other areas is determined; and according to the temperature difference and a preset temperature difference threshold value, whether the target airflow of the target area is uniform or not is determined, and when the target airflow is uniform, charge level correction in the target blast furnace is achieved. According to the method and the device, the circumferential airflow in the target blast furnace can be rectified in the normal operation non-damping-down state of the target blast furnace, so that the material level of the target blast furnace is rectified, the circumferential airflow of the target blast furnace is uniform and stable, and the stable operation of the target blast furnace is realized.

Description

Technical Field

[0001] The present application relates to the technical field of target blast furnace smelting, and in particular to a method and device for determining deviation correction of a target blast furnace charge surface under a blast supply state. Background Art

[0002] At present, during the operation of the target blast furnace, there will be problems such as circumferential airflow deviation caused by uneven circumferential erosion of the furnace wall or uneven thickness of the slag skin on the furnace wall, unreasonable tuyere layout, uneven circumferential iron tapping and uneven furnace top distribution. Short-term airflow deviation will affect the iron tapping rhythm and molten iron quality of the target blast furnace, while long-term airflow deviation will aggravate the irregularity of the operating furnace type and affect the stable and smooth operation of the target blast furnace.

[0003] However, in the traditional correction operation, the fundamental reason for the deviation of the target blast furnace charge surface is the serious deviation of the circumferential airflow of the target blast furnace. The airflow deviation cannot be corrected only by improving the quality of raw materials and fuels, adjusting the furnace top charging system, improving wind pressure and air volume and temperature, and other measures. The traditional correction operation requires changing the tuyere layout, but due to the demand for production balance of the steel production line, it is impossible to adjust the tuyere layout by arbitrarily stopping the wind. Therefore, it is impossible to accurately correct the target blast furnace charge surface, and once the correction is completed, in order to prevent excessive correction, it is necessary to stop the wind again to adjust the tuyere layout. This wind stop method has certain limitations in implementation and cannot guarantee the stable operation of the target blast furnace. Summary of the invention

[0004] The embodiments of the present application provide a method and device for determining the deviation correction of a target blast furnace charge surface under air supply conditions, which can correct the deviation of the circumferential airflow in the target blast furnace while the target blast furnace is operating normally without air shut-off, thereby correcting the deviation of the target blast furnace charge surface, making the circumferential airflow of the target blast furnace uniform and stable, thereby achieving stable operation of the target blast furnace.

[0005] In a first aspect of the embodiments of the present application, the embodiments of the present application provide a method for determining the deviation correction of a target blast furnace charge surface under an air supply state, the method for determining the deviation correction of a target blast furnace charge surface under an air supply state comprising:

[0006] Based on the temperature data of each area in the target blast furnace to be detected, determining at least one target area under the target blast furnace, wherein the target area is used to characterize an area with weak airflow in the target blast furnace;

[0007] For any of the target areas, based on the first coal injection change amount in the target area, determine the temperature difference between the target temperature data of the target area and the temperature data of other areas;

[0008] For any of the target areas, whether the target airflow in the target area is uniform is determined based on the temperature difference and a preset temperature difference threshold, and when the target airflow is uniform, the material surface in the target blast furnace is corrected.

[0009] In a feasible implementation manner, the step of determining at least one target area under the target blast furnace based on the temperature data of each area in the target blast furnace to be detected includes:

[0010] Determine the temperature data, material feeding time and iron tapping time of each area in the target blast furnace to be inspected;

[0011] The temperature data are sorted according to the temperature, and the area matched by the highest temperature data is determined as the target area;

[0012] The material unloading time is sorted according to the time length, and the area with the shortest material unloading time is determined as the target area;

[0013] The iron-tapping times are sorted according to the length of time, and the area with the longest iron-tapping time is determined as the target area.

[0014] In a feasible implementation manner, for any of the target areas, based on the first coal injection change amount in the target area, the temperature difference between the target temperature data of the target area and the temperature data of other areas is determined:

[0015] For any target area, determining a first coal injection change amount in the target area;

[0016] Based on the coal change amount and the initial temperature data of the target area, target temperature data of the target area and a temperature difference between the target temperature data and temperature data of other areas are determined.

[0017] In a feasible implementation manner, for any of the target areas, determining whether the target airflow of the target area is uniform according to the temperature difference and a preset temperature difference threshold includes:

[0018] For any of the target areas, determining whether the temperature difference is less than or equal to a preset temperature difference threshold;

[0019] If so, it is determined that the target airflow in the target area is uniform;

[0020] If not, it is determined that the target airflow in the target area is not uniform.

[0021] In a feasible implementation manner, for any of the target areas, determining whether the target airflow in the target area is uniform according to the temperature difference and the preset temperature difference threshold, and when the target airflow is uniform, after the material surface deviation correction in the target blast furnace is achieved, the method for determining the material surface deviation correction of the target blast furnace under the air supply state further includes:

[0022] After the time after the target airflow in the target area is uniform reaches a preset time, determining whether the target airflow in the target area is uniform;

[0023] If not, then based on the second coal injection change amount in the target area, the material surface in the target blast furnace is corrected again.

[0024] In a feasible implementation manner, the first coal injection change amount is used to characterize the coal injection change amount after the injection gun is closed.

[0025] In a feasible implementation manner, the second coal injection variation is used to characterize the coal injection variation after the injection gun is closed, and the coal injection variation is used to characterize the coal injection variation after the injection gun is opened.

[0026] In a second aspect of the embodiment of the present application, the embodiment of the present application further provides a device for determining the deviation correction of a target blast furnace material surface under air supply state, wherein the device for determining the deviation correction of a target blast furnace material surface under air supply state comprises:

[0027] A first determination module is used to determine at least one target area under the target blast furnace based on the temperature data of each area in the target blast furnace to be detected, wherein the target area is used to characterize an area with weak airflow in the target blast furnace;

[0028] A second determination module is used to determine, for any of the target areas, a temperature difference between the target temperature data of the target area and the temperature data of other areas based on the first coal injection change amount in the target area;

[0029] The third determination module is used to determine whether the target airflow in any of the target areas is uniform according to the temperature difference and a preset temperature difference threshold, and to correct the material surface in the target blast furnace when the target airflow is uniform.

[0030] According to a third aspect of the embodiments of the present application, an electronic device is provided, comprising: a processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor communicates with the memory via the bus, and the machine-readable instructions are executed by the processor when running, such as the steps of the method for determining the deviation correction of the target blast furnace material surface under the above-mentioned air supply state.

[0031] In a fourth aspect of the embodiments of the present application, the embodiments of the present application further provide a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed by a processor, the steps of the method for determining the target blast furnace material surface correction under the above-mentioned air supply state are executed.

[0032] The method and device for determining the deviation correction of the target blast furnace charge surface under the air supply state provided in the embodiment of the present application, compared with the prior art, the embodiment provided by the present application determines at least one target area under the target blast furnace by detecting the temperature data of each area in the target blast furnace, and for any target area, based on the first coal injection change in the target area, determines the temperature difference between the target temperature data of the target area and the temperature data of other areas, and then for any target area, determines whether the target airflow of the target area is uniform according to the temperature difference and the preset temperature difference threshold, and realizes the deviation correction of the charge surface in the target blast furnace when the target airflow is uniform. The present application can realize the deviation correction of the circumferential airflow in the target blast furnace under the state of normal operation of the target blast furnace without stopping the airflow, and then realizes the deviation correction of the charge surface of the target blast furnace, so that the circumferential airflow of the target blast furnace is uniform and stable, and then realizes the stable operation of the target blast furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 One of the flowcharts of a method for determining deviation correction of a target blast furnace material surface under a blast supply state provided by an embodiment of the present application is shown;

[0034] Figure 2 The second flowchart of a method for determining a target blast furnace material surface deviation correction under a blast supply state provided by an embodiment of the present application is shown;

[0035] Figure 3 A structural block diagram of a device for determining a target blast furnace material surface deviation correction under a blast supply state provided by an embodiment of the present application is shown;

[0036] Figure 4 A schematic structural diagram of an electronic device provided in an embodiment of the present application is shown.

[0037] Figure 3 and Figure 4 The corresponding relationship between the reference numerals and the names of the drawings is as follows:

[0038] 300 a determination device for correcting the deviation of a target blast furnace material surface under air supply state; 310 a first determination module; 320 a second determination module; 330 a third determination module; 340 a fourth determination module; 350 a correction module; 400 an electronic device; 410 a processor; 420 a memory; 430 a bus. DETAILED DESCRIPTION

[0039] In order to better understand the technical solutions provided by the embodiments of this specification, the technical solutions of the embodiments of this specification are described in detail below through the accompanying drawings and specific embodiments. It should be understood that the embodiments of this specification and the specific features in the embodiments are detailed descriptions of the technical solutions of the embodiments of this specification, rather than limitations on the technical solutions of this specification. In the absence of conflict, the embodiments of this specification and the technical features in the embodiments can be combined with each other.

[0040] In this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or equipment. In the absence of more restrictions, the elements limited by the statement "comprise one..." do not exclude the existence of other identical elements in the process, method, article or equipment including the elements. The term "more than two" includes two or more than two situations.

[0041] First, the applicable application scenarios of the present application are introduced. The embodiments provided in the present application are applicable to any application scenario requiring target blast furnace smelting technology.

[0042] Now, in the traditional deviation correction operation, the fundamental reason for the deviation of the target blast furnace charge surface is the serious deviation of the target blast furnace circumferential airflow. The deviation of the airflow cannot be corrected only by improving the quality of raw materials and fuels, adjusting the furnace top charging system, improving the wind pressure and air volume and temperature and other measures. The traditional deviation correction operation requires changing the tuyere layout, but due to the demand for production balance of the steel production line, it is impossible to adjust the tuyere layout by arbitrarily stopping the wind. Therefore, it is impossible to achieve accurate deviation correction of the target blast furnace charge surface, and once the deviation correction is completed, in order to prevent excessive deviation correction, it is necessary to stop the wind again to adjust the tuyere layout. This wind stop method has certain limitations in implementation and cannot guarantee the stable operation of the target blast furnace.

[0043] In traditional deviation correction operations, when the deviation between the two probes is small, it is necessary to adjust the charging method on the upper part of the target blast furnace, change the distribution matrix, improve the quality of raw materials and fuel, etc. to increase the target blast furnace air volume, increase the blast kinetic energy, and activate the center of the target blast furnace to correct the probe deviation. When the target blast furnace has serious circumferential deviations, the traditional method is to shut down the target blast furnace and stop production. During this period, the tuyere layout (including air inlet area, blocked tuyere, and use of long and short tuyere, etc.) is adjusted to correct the circumferential airflow deviation. However, shutting down the target blast furnace generally takes a long time, resulting in a large loss of production capacity, and the air supply status of the target blast furnace needs to be suspended, and some hardware inside the target blast furnace needs to be adjusted.

[0044] The deviation of traditional target blast furnace is mainly manifested in: ① The deviation of the probe arranged circumferentially of the target blast furnace is large, sometimes even 1.5-2.0m, or even larger; ② The temperature deviation in the four directions of the furnace top is large. Normally, the temperature at the four points around the furnace top should deviate by ≤30℃, and when the circumferential airflow deviates, the temperature difference on the furnace top may be as high as 50-100℃ or even higher; ③ The static pressure deviation of the furnace body arranged circumferentially on the upper part of the furnace body is ≥10KPa; ④ The average tapping time deviation of the two 180° open iron mouths is ≥5min, etc.

[0045] Moreover, traditional technology believes that the target blast furnace is uneven in circumference and the reason for fast local material discharge is that the air intake in the area with fast material discharge is larger than that in other circumferential areas, so more space is freed up for burning coke. At the same time, the amount of rising coal gas in this area is large, the chemical reactions are more than other areas, and there are more melted charge, which leads to fast charge descent in this area. At the same time, since there is more air intake, fast material discharge and more chemical reactions in this area, the iron tapping time in this area is long.

[0046] However, in the embodiments provided in the present application, it is believed that: the gas flow at a certain circumferential position of the target blast furnace is too large, resulting in a pipeline stroke at that position or in the upper area of ​​that position, generating a force opposite to the direction of material descent, slowing down the material discharge in the furnace top area corresponding to the circumferential position of the target blast furnace, and the iron mouth at the position with pipeline airflow is prone to splashing by the wind, making it difficult to tap iron. Therefore, the air intake at the circumferential position is too large, which leads to slow material discharge in this area, and due to the pipeline airflow in this area, the iron mouth in the high area is prone to splashing, resulting in less iron tapping. Therefore, the airflow at this circumferential position with fast material discharge is weak, and the air intake is less, rather than more air intake.

[0047] Based on this, the embodiment of the present application provides a method and device for determining the deviation correction of the target blast furnace charge surface under the air supply state. The present application can realize the deviation correction of the circumferential airflow in the target blast furnace when the target blast furnace is operating normally without stopping the air flow, thereby realizing the deviation correction of the target blast furnace charge surface, making the circumferential airflow of the target blast furnace uniform and stable, thereby realizing the stable operation of the target blast furnace.

[0048] See also Figure 1 , Figure 1One of the flowcharts of a method for determining the deviation correction of a target blast furnace charge surface under a blast supply state provided in an embodiment of the present application is as follows: Figure 1 As shown, the method for determining the deviation correction of the target blast furnace charge surface under the air supply state includes the following steps:

[0049] S101. Determine at least one target area under the target blast furnace based on temperature data of various areas in the target blast furnace to be detected, wherein the target area is used to characterize an area with weak airflow in the target blast furnace.

[0050] In this step, first, the embodiment provided in the present application first determines the temperature data of each area in the target blast furnace to be detected, and then confirms the areas in the target blast furnace with fast downward material flow, high top temperature and long iron-out time as target areas with weak airflow.

[0051] Here, in the embodiments provided in the present application, there is more than one target area with weak airflow in the target blast furnace, and there may be a situation where there are multiple target areas in one target blast furnace.

[0052] Among them, the target blast furnace is a vertical furnace type countercurrent reactor. The working principle of the target blast furnace is that the raw fuel added from the furnace top (the raw fuel in the embodiment provided in the further application can be specifically but not limited to: sintering + pelletizing + lump ore + coke) is subjected to the action of the high-temperature reducing gas flowing upward (the reducing gas is the air blown in by the blower, which is heated by the hot blast furnace and enters the target blast furnace through the tuyere, and burns and reacts with the coke in the target blast furnace to generate coal gas), and then is continuously heated, decomposed, reduced, softened, melted, dripped and carburized, and finally forms a slag-iron melt and separates. Here, the production process of the target blast furnace is carried out continuously, which is realized by continuous loading of materials from the furnace top and continuous tapping of iron from the iron mouth below, and the volume of the target blast furnace ranges from hundreds to thousands of m3.

[0053] The operating status of the target blast furnace is generally expressed by relevant data, which include: cold air flow, cold air pressure, hot air pressure, furnace top pressure, hot air temperature, furnace body temperature, furnace top temperature, material surface probe downward condition and furnace body static pressure, etc.

[0054] S102. For any of the target areas, based on the first coal injection change amount in the target area, determine the temperature difference between the target temperature data of the target area and the temperature data of other areas.

[0055] In this step, it is assumed that the embodiment provided in the present application realizes increasing the target temperature data of the target area by reducing the coal injection amount in the target area. It is assumed that the embodiment provided in the present application determines the first coal injection change amount by stopping 3-4 coal powder injection guns in the target area with weak circumferential airflow at one time, and determines the range of temperature increase in the target area based on the first coal injection change amount, that is, 2. For any of the target areas, the temperature difference between the target temperature data of the target area and the temperature data of other areas is determined based on the first coal injection change amount under the target area.

[0056] Here, since the coal powder spray gun stops spraying, the volume of the coal gas expands greatly, thereby strengthening the airflow in the target area and making the circumferential airflow tend to be uniform.

[0057] Among them, when the coal powder spray gun stops spraying coal, compressed air will be introduced around the coal spray gun to ensure that the spray gun is not damaged by high temperature.

[0058] In this way, the first coal injection variation is used to characterize the coal injection variation after the lance is closed.

[0059] S103. For any of the target areas, determine whether the target airflow in the target area is uniform according to the temperature difference and a preset temperature difference threshold, and correct the material surface in the target blast furnace when the target airflow is uniform.

[0060] In this step, while determining that the injection amount and temperature difference of the pulverized coal spray gun in the target area are reduced, it is determined whether the temperature difference is within the range specified by the preset temperature difference threshold. If so, it is determined that the target airflow in the target area is uniform; if not, it is determined that the target airflow in the target area is uneven.

[0061] The method for determining the deviation correction of the target blast furnace charge surface under the air supply state provided in the embodiment of the present application, compared with the prior art, the embodiment provided by the present application determines at least one target area under the target blast furnace by detecting the temperature data of each area in the target blast furnace, and for any target area, based on the first coal injection change in the target area, determines the temperature difference between the target temperature data of the target area and the temperature data of other areas, and then for any target area, determines whether the target airflow of the target area is uniform according to the temperature difference and the preset temperature difference threshold, and realizes the deviation correction of the charge surface in the target blast furnace when the target airflow is uniform. The present application can realize the deviation correction of the circumferential airflow in the target blast furnace under the state of normal operation of the target blast furnace without stopping the airflow, and then realizes the deviation correction of the charge surface of the target blast furnace, so that the circumferential airflow of the target blast furnace is uniform and stable, and then realizes the stable operation of the target blast furnace.

[0062] In a feasible embodiment, step S101 includes the following sub-steps:

[0063] Sub-step 1011, determining the temperature data, material unloading time and iron tapping time in each area of ​​the target blast furnace to be inspected.

[0064] In this step, it is assumed that the embodiment provided in the present application determines the area in the target blast furnace with high temperature data, short material feeding time and long iron tapping time as the target area.

[0065] Sub-step 1012: sort the temperature data according to the temperature, and determine the area matched by the highest temperature data as the target area.

[0066] In this step, the target area in the embodiment provided by the present application includes at least one, and therefore, the target area in the embodiment provided by the present application can also be determined as the area with the first few positions of temperature data.

[0067] Sub-step 1013: sort the material unloading times according to the length of time, and determine the area with the shortest material unloading time as the target area.

[0068] In this step, the target area in the embodiment provided by the present application includes at least one, and therefore, the target area in the embodiment provided by the present application can also be determined as the areas that rank first in order of the length of material unloading time.

[0069] Sub-step 1014: sort the tapping times according to the length of time, and determine the area with the longest tapping time as the target area.

[0070] In this step, the target area in the embodiment provided by the present application includes at least one, and therefore, the target area in the embodiment provided by the present application can also be determined as the areas with the top few iron-out times from large to small.

[0071] In a feasible embodiment, step S102 includes the following sub-steps:

[0072] Sub-step 1021: for any target area, determining a first coal injection change amount in the target area.

[0073] In this step, the first coal injection change amount in the embodiment provided in the present application is used to characterize the coal injection change amount after the lance is closed.

[0074] Sub-step 1022: determining the target temperature data of the target area and the temperature difference between the target temperature data and the temperature data of other areas based on the coal change amount and the initial temperature data of the target area.

[0075] In this step, after determining the coal change amount and the initial temperature data of the target area, it is necessary to determine the target temperature data of the target area after stopping some of the spray guns, and determine the temperature difference between the target temperature data and the temperature data of other areas in the target blast furnace.

[0076] In a feasible embodiment, step S103 includes the following sub-steps:

[0077] Sub-step 1031: for any of the target areas, determine whether the temperature difference is less than or equal to a preset temperature difference threshold.

[0078] Sub-step 1032: If yes, determine that the target airflow in the target area is uniform; if no, determine that the target airflow in the target area is non-uniform.

[0079] The following is described by two specific embodiments: one:

[0081] Target blast furnace effective volume 1440m 3 , with 22 tuyere and 2 iron ports, opening in 180° direction, namely the east iron port and the west iron port. There are 2 mechanical probes on the furnace top, corresponding to the circumferential positions of the east and west iron ports, namely the east probe and the west probe. The target blast furnace operated stably in the first two years of production. However, after two years, the target blast furnace experienced fluctuations to varying degrees. The target blast furnace had collapsed material, suspended material and air volume that could not be increased for a long time. The tuyere small sleeve was frequently damaged. The east and west probes differed by 1500-2000mm. The low-measured east material ruler had little change in measured value over a long period of time. The material ruler data only showed a sharp rise when the material collapsed. The target blast furnace has the following characteristics:

[0082] (1) The deviation of the probe is huge, with a difference of 1500-2500mm. After the fan-shaped fabric is corrected, the deviation of the material surface becomes smaller, but after normal fabrication, the deviation increases again.

[0083] (2) There are large differences in the amount of iron tapping, tapping time, and molten iron temperature between the east and west tapping holes. The tapping time is 90-120 minutes in the west, but only 20-30 minutes in the east.

[0084] (3) The top temperature difference on both sides is more than 100°C, and the top temperature curve layers have no intersection.

[0085] (4) The static pressure difference between the east and west sides of the furnace is as high as 20KPa or more.

[0086] (5) The target blast furnace does not accept top pressure and pressure difference, the air volume is small, and it is below 2500m3 / min for a long time, and the target blast furnace fluctuates frequently.

[0087] Based on this, the method in the embodiment provided in this application is used:

[0088] (1) The target blast furnace westward area with fast material discharge, high top temperature and long tapping time is identified as the target area with weak airflow.

[0089] (2) Stop the four coal powder spraying guns in the target area with weak circumferential airflow at one time, and continue to supply compressed air to ensure that the spray guns are not damaged by high temperature.

[0090] (3) The combustion temperature in the area where the injection is stopped is high, and the gas expansion range is large. The airflow in this area is gradually strengthened, making the circumferential airflow uniform.

[0091] (4) As the circumferential airflow gradually became uniform, the stopped coal injection guns were gradually restored. In the first 10 hours, one gun was restored to spray coal; after another 12 hours, the second gun was restored to spray coal; after another 15 hours, the third gun was restored to spray coal; and finally after 16 hours, the fourth gun was restored to spray coal. At this point, after 53 hours, the four coal injection guns were fully restored to spray.

[0092] The above adjustments have achieved significant results:

[0093] (1) The probe gradually levels off. Occasionally there are small differences, but they are all within a reasonable range (<300mm). There is no need to perform fan-shaped distribution.

[0094] (2) The tapping of iron on the east and west sides is normal, and the parameters such as tapping amount, tapping time and molten iron temperature are close. The difference in tapping time is narrowed to within 5 minutes, and the difference in molten iron temperature is within 10°C.

[0095] (3) The top temperatures on both sides gradually approach each other, the top temperature difference is within 20°C, the top temperature curves intersect, and there is no stratification phenomenon.

[0096] (4) The difference in static pressure on the upper part of the furnace body on both sides is reduced to within 5KPa.

[0097] (5) The target blast furnace receives top pressure and pressure difference, and the air volume increases from 2500m 3 / min increased to 3100m 3 / min, the target blast furnace is stable and running smoothly, the specific parameter changes are shown in Table 1:

[0098] project Probe deviation Utilization coefficient Focal Ratio Coal ratio Fuel ratio unit mm <![CDATA[t / m 3 .d]]> kg / t kg / t kg / t Before implementation 1500 2.5 430 125 555 After implementation 200 3.5 401 135 536 Out of tolerance -1300 1.0 -29 10 -19 project Gas utilization rate Pig iron cost Wealth Rate Furnace top temperature Weekly suspension times unit ％ Yuan / t ％ ℃ Second-rate Before implementation 41 2916 1.5 220 8 After implementation 45 2766 5 140 0 Out of tolerance 4 -150 +3.5 -80 -8

[0099] Table 1 two:

[0101] Target blast furnace effective volume 2500m 3, with 28 tuyere and 4 iron ports, evenly opened along 90°, namely the east iron port, south iron port, west iron port and north iron port; there are 2 mechanical probes on the furnace top, corresponding to the circumferential positions of the south and north iron ports, namely the south east probe and the north probe; the target blast furnace operated stably in the first 3 years before it was put into production, but 3 years later, the target blast furnace experienced fluctuations to varying degrees, with collapsed materials, suspended materials and long-term stagnation of air volume, frequent damage to the tuyere sleeve, and a difference of 1500-2000mm between the north and south probes. The low measured value of the south material ruler has little change in the measured value over a long period of time, and the material ruler data will only show a sharp rise when the material collapses. The target blast furnace has the following characteristics:

[0102] (1) The deviation of the probe is huge, with a difference of 1500-2500mm. After the fan-shaped fabric is corrected, the deviation of the material surface becomes smaller, but after normal fabrication, the deviation increases again.

[0103] (2) The iron output, iron tapping time and molten iron temperature of each tapping hole of the target blast furnace vary greatly. The iron tapping time is 90-120 minutes in the north, but only 20-30 minutes in the south.

[0104] (3) The top temperatures at the four points differ by more than 110°C, and the top temperature curves are layered without any intersection.

[0105] (4) The static pressure difference between the upper part of the north and south furnace bodies is as high as more than 25KPa.

[0106] (5) The target blast furnace does not accept top pressure and pressure difference, the air volume is small, and it is below 4300m3 / min for a long time, and the target blast furnace fluctuates frequently.

[0107] Based on this, the method in the embodiment provided in this application is used:

[0108] (1) The target blast furnace area with fast material discharge, high top temperature and long tapping time in the north is identified as the target area with weak airflow.

[0109] (2) Stop the four coal powder spraying guns in the target area with weak circumferential airflow at one time, and continue to supply compressed air to ensure that the spray guns are not damaged by high temperature.

[0110] (3) The combustion temperature in the area where the injection is stopped is high, and the gas expansion range is large. The airflow in this area is gradually strengthened, making the circumferential airflow uniform.

[0111] (4) As the circumferential airflow gradually became uniform, the stopped coal injection guns were gradually restored. First, one gun was restored to spray coal 13 hours later; then the second gun was restored after 14 hours; then the third gun was restored after 15 hours; and finally the fourth gun was restored after 16 hours. At this point, after 58 hours, all four coal injection guns were fully restored to spray coal.

[0112] The above adjustments have achieved significant results:

[0113] (1) The probe gradually levels off. Occasionally there are small differences, but they are all within a reasonable range (<300mm). There is no need to perform fan-shaped distribution.

[0114] (2) The tapping of iron on the east and west sides is normal, and the parameters such as tapping amount, tapping time and molten iron temperature are close. The difference in tapping time is narrowed to within 5 minutes, and the difference in molten iron temperature is within 10°C.

[0115] (3) The top temperatures on both sides gradually approach each other, the top temperature difference is within 25°C, the top temperature curves intersect, and there is no stratification phenomenon.

[0116] (4) The difference in static pressure on the upper part of the furnace body on both sides is reduced to within 6KPa.

[0117] (5) The target blast furnace receives top pressure and pressure difference, and the air volume increases from 4300m 3 / min increased to 4800m 3 / min, the target blast furnace is stable and running smoothly, the specific parameter changes are shown in Table 2:

[0118] project Probe deviation Cold air flow Utilization coefficient Focal Ratio Coal ratio Fuel ratio unit mm <![CDATA[m 3 / min]]> <![CDATA[t / m 3 .d]]> kg / t kg / t kg / t Before implementation 1500 4300 1.95 420 121 541 After implementation 200 4800 2.65 370 150 520 Out of tolerance -1300 500 07 -50 29 -21 project Gas utilization rate Pig iron cost Wealth Rate Furnace top temperature Weekly suspension times unit ％ Yuan / t ％ ℃ Second-rate Before implementation 41.5 2806 1.5 200 5 After implementation 46 2705 6 150 0 Out of tolerance 4.5 -101 4.5 50 -5

[0119] Table 2

[0120] The method for determining the deviation correction of the target blast furnace charge surface under the air supply state provided in the embodiment of the present application, compared with the prior art, the embodiment provided by the present application determines at least one target area under the target blast furnace by detecting the temperature data of each area in the target blast furnace, and for any target area, based on the first coal injection change in the target area, determines the temperature difference between the target temperature data of the target area and the temperature data of other areas, and then for any target area, determines whether the target airflow in the target area is uniform according to the temperature difference and the preset temperature difference threshold, and realizes the deviation correction of the charge surface in the target blast furnace when the target airflow is uniform. The present application can realize the deviation correction of the circumferential airflow in the target blast furnace under the state of normal operation of the target blast furnace without stopping the airflow, and then realizes the deviation correction of the charge surface of the target blast furnace, so that the circumferential airflow of the target blast furnace is uniform and stable, thereby realizing the stable operation of the target blast furnace and achieving energy saving and consumption reduction.

[0121] See also Figure 2 , Figure 2 The second flowchart of the method for determining the deviation correction of the target blast furnace material surface under the air supply state provided in the embodiment of the present application is as follows: Figure 2 As shown, the method for determining the deviation correction of the target blast furnace charge surface under the air supply state includes the following steps:

[0122] S201. Determine at least one target area under the target blast furnace based on temperature data of various areas in the target blast furnace to be detected, wherein the target area is used to characterize an area with weak airflow in the target blast furnace.

[0123] S202: For any of the target areas, based on the first coal injection change amount in the target area, determine the temperature difference between the target temperature data of the target area and the temperature data of other areas.

[0124] S203. For any of the target areas, determine whether the target airflow in the target area is uniform according to the temperature difference and a preset temperature difference threshold, and correct the material surface in the target blast furnace when the target airflow is uniform.

[0125] S204: After the time duration after the target airflow in the target area is uniform reaches a preset time duration, determine whether the target airflow in the target area is uniform.

[0126] In this step, the embodiment provided in the present application needs to gradually restore the stopped coal injection guns according to the changes in the circumferential airflow after determining that the target airflow in the target area is uniform at the moment. Specifically, after the time when the target airflow in the target area is uniform reaches a preset time, restore a coal injection gun every 8-16 hours. At this time, determine whether the target airflow in the target area is uniform, until the circumferential airflow of the blast furnace is basically uniform.

[0127] S205: If not, then based on the second coal injection change amount in the target area, the material surface in the target blast furnace is corrected again.

[0128] In this step, the second coal injection change amount in the embodiment provided in the present application is used to characterize the coal injection change amount after the lance is closed, and the coal injection change amount after the lance is opened is used to characterize the coal injection change amount.

[0129] The description of S201 and S203 may refer to the description of S101 and S103, and can achieve the same technical effect, which will not be elaborated herein.

[0130] The method for determining the deviation correction of the target blast furnace charge surface under the air supply state provided in the embodiment of the present application, compared with the prior art, the embodiment provided by the present application determines at least one target area under the target blast furnace by detecting the temperature data of each area in the target blast furnace, and for any target area, based on the first coal injection change in the target area, determines the temperature difference between the target temperature data of the target area and the temperature data of other areas, and then for any target area, determines whether the target airflow in the target area is uniform according to the temperature difference and the preset temperature difference threshold, and realizes the deviation correction of the charge surface in the target blast furnace when the target airflow is uniform. The present application can realize the deviation correction of the circumferential airflow in the target blast furnace under the state of normal operation of the target blast furnace without stopping the airflow, and then realizes the deviation correction of the charge surface of the target blast furnace, so that the circumferential airflow of the target blast furnace is uniform and stable, thereby realizing the stable operation of the target blast furnace and achieving energy saving and consumption reduction.

[0131] See also Figure 3 , Figure 3 A structural block diagram of a device for determining a target blast furnace material surface deviation correction under a blast supply state provided in an embodiment of the present application, such as Figure 3 As shown, the device 300 for determining the deviation correction of the target blast furnace charge surface in the air supply state:

[0132] The first determination module 310 is used to determine at least one target area under the target blast furnace based on the temperature data of each area in the target blast furnace to be detected, wherein the target area is used to characterize an area with weak airflow in the target blast furnace.

[0133] The second determination module 320 is used to determine, for any of the target areas, the temperature difference between the target temperature data of the target area and the temperature data of other areas based on the first coal injection change amount in the target area.

[0134] The third determination module 330 is used to determine whether the target airflow in any of the target areas is uniform according to the temperature difference and a preset temperature difference threshold, and to correct the material surface in the target blast furnace when the target airflow is uniform.

[0135] The fourth determination module 340 is used to determine whether the target airflow in the target area is uniform after the time duration after the target airflow in the target area is uniform reaches a preset time duration.

[0136] The deviation correction module 350 is used to correct the material surface in the target blast furnace again based on the second coal injection change amount in the target area if no.

[0137] Optionally, the first coal injection change amount is used to characterize the coal injection change amount after the injection gun is closed.

[0138] Optionally, the second coal injection change amount is used to characterize the coal injection change amount after the injection gun is closed, and the coal injection change amount is used to characterize the coal injection change amount after the injection gun is opened.

[0139] Optionally, the first determining module 310 is specifically configured to:

[0140] Determine the temperature data, material feeding time and iron tapping time of each area in the target blast furnace to be inspected;

[0141] The temperature data are sorted according to the temperature, and the area matched by the highest temperature data is determined as the target area.

[0142] The material unloading time is sorted according to the length of time, and the area with the shortest material unloading time is determined as the target area.

[0143] The iron-tapping times are sorted according to the length of time, and the area with the longest iron-tapping time is determined as the target area.

[0144] Optionally, the second determining module 320 is specifically configured to:

[0145] For any target area, a first coal injection variation amount in the target area is determined.

[0146] Based on the coal change amount and the initial temperature data of the target area, target temperature data of the target area and a temperature difference between the target temperature data and temperature data of other areas are determined.

[0147] Optionally, the third determining module 330 is specifically configured to:

[0148] For any of the target areas, it is determined whether the temperature difference is less than or equal to a preset temperature difference threshold.

[0149] If so, it is determined that the target airflow in the target area is uniform.

[0150] If not, it is determined that the target airflow in the target area is not uniform.

[0151] The device 300 for determining the deviation correction of the target blast furnace charge surface under the air supply state provided in the embodiment of the present application, compared with the prior art, determines at least one target area under the target blast furnace by detecting the temperature data of each area in the target blast furnace, and for any target area, determines the temperature difference between the target temperature data of the target area and the temperature data of other areas based on the first coal injection change in the target area, and then for any target area, determines whether the target airflow in the target area is uniform according to the temperature difference and the preset temperature difference threshold, and realizes the deviation correction of the charge surface in the target blast furnace when the target airflow is uniform. The present application can realize the deviation correction of the circumferential airflow in the target blast furnace under the state of normal operation of the target blast furnace without stopping the airflow, and then realizes the deviation correction of the charge surface of the target blast furnace, so that the circumferential airflow of the target blast furnace is uniform and stable, thereby realizing the stable operation of the target blast furnace and achieving energy saving and consumption reduction.

[0152] See also Figure 4 , Figure 4 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application is shown in FIG. Figure 4 As shown in , the electronic device 400 includes a processor 410 , a memory 420 and a bus 430 .

[0153] The memory 420 stores machine-readable instructions executable by the processor 410. When the electronic device 400 is running, the processor 410 communicates with the memory 420 via the bus 430. When the machine-readable instructions are executed by the processor 410, the above-mentioned Figure 1 to Figure 2 The steps of the method for determining the target blast furnace charge surface deviation correction under the air supply state in the method embodiment shown in the embodiment, the specific implementation method can be referred to the method embodiment, and will not be repeated here.

[0154] The present application also provides a computer-readable storage medium on which a computer program is stored. When the computer program is executed by a processor, the computer program can execute the above-mentioned Figure 1 to Figure 2 The steps of the method for determining the target blast furnace charge surface deviation correction under the air supply state in the method embodiment shown in the embodiment, the specific implementation method can be referred to the method embodiment, and will not be repeated here.

[0155] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0156] It should be noted that in the above embodiments, the description of each embodiment has its own emphasis, and for parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0157] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment in combination with software and hardware. Moreover, the present application may adopt the form of a computer program product implemented in one or more computer-readable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) that contain computer-readable program code.

[0158] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes 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 computer, or other programmable data processing device to generate 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 device that provides the functions specified in a block or multiple blocks.

[0159] These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer-readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0160] 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.

[0161] An embodiment of the present application also provides a computer program product, which includes computer software instructions. When the computer software instructions are executed on a processing device, the processing device executes the process of the LDPC decoding method of the solid-state hard disk controller.

[0162] The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the process or function according to the embodiment of the present application is generated in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions can be transmitted from a website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (digital subscriber line, DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that a computer can store or a data storage device such as a server or a data center that includes one or more available media integration. The available medium can be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid state drive (SSD)), etc.

[0163] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0164] In the several embodiments provided in the present application, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms.

[0165] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0166] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0167] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application is essentially or the part that contributes to the prior art or all or part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including a number of instructions to enable a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the various embodiments of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), disk or optical disk and other media that can store program codes.

[0168] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

[0169] Although the preferred embodiments of this specification have been described, those skilled in the art may make additional 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 this specification.

[0170] Obviously, those skilled in the art can make various changes and modifications to this specification without departing from the spirit and scope of this specification. Thus, if these modifications and variations of this specification fall within the scope of the claims of this specification and their equivalents, this specification is also intended to include these modifications and variations.

Claims

1. A method for determining deviation correction of target blast furnace charge surface under air supply state, characterized in that: The method for determining the deviation correction of the target blast furnace material surface under the air supply state comprises: Based on the temperature data of each area in the target blast furnace to be detected, determining at least one target area under the target blast furnace, wherein the target area is used to characterize an area with weak airflow in the target blast furnace; For any of the target areas, based on the first coal injection change amount in the target area, determine the temperature difference between the target temperature data of the target area and the temperature data of other areas; For any of the target areas, whether the target airflow in the target area is uniform is determined based on the temperature difference and a preset temperature difference threshold, and when the target airflow is uniform, the material surface in the target blast furnace is corrected.

2. The method for determining the deviation correction of the target blast furnace charge surface under the air supply state according to claim 1, characterized in that: The step of determining at least one target area under the target blast furnace based on the temperature data of each area in the target blast furnace to be detected comprises: Determine the temperature data, material feeding time and iron tapping time of each area in the target blast furnace to be inspected; The temperature data are sorted according to the temperature, and the area matched by the highest temperature data is determined as the target area; The material unloading time is sorted according to the time length, and the area with the shortest material unloading time is determined as the target area; The iron-tapping times are sorted according to the length of time, and the area with the longest iron-tapping time is determined as the target area.

3. The method for determining the deviation correction of the target blast furnace charge surface under the air supply state according to claim 1, characterized in that: For any of the target areas, based on the first coal injection change amount in the target area, the temperature difference between the target temperature data of the target area and the temperature data of other areas is determined: For any target area, determining a first coal injection change amount in the target area; Based on the coal change amount and the initial temperature data of the target area, target temperature data of the target area and a temperature difference between the target temperature data and temperature data of other areas are determined.

4. The method for determining the deviation correction of the target blast furnace charge surface under the air supply state according to claim 1, characterized in that: For any of the target areas, determining whether the target airflow of the target area is uniform according to the temperature difference and a preset temperature difference threshold includes: For any of the target areas, determining whether the temperature difference is less than or equal to a preset temperature difference threshold; If so, it is determined that the target airflow in the target area is uniform; If not, it is determined that the target airflow in the target area is not uniform.

5. The method for determining the deviation correction of the target blast furnace charge surface under the air supply state according to claim 1, characterized in that: After determining whether the target airflow in the target area is uniform according to the temperature difference and the preset temperature difference threshold for any of the target areas, and realizing the deviation correction of the material surface in the target blast furnace when the target airflow is uniform, the method for determining the deviation correction of the material surface of the target blast furnace under the air supply state further includes: After the time after the target airflow in the target area is uniform reaches a preset time, determining whether the target airflow in the target area is uniform; If not, then based on the second coal injection change amount in the target area, the material surface in the target blast furnace is corrected again.

6. The method for determining the deviation correction of the target blast furnace charge surface under the air supply state according to claim 1, characterized in that: The first coal injection variation is used to characterize the coal injection variation after the injection gun is closed.

7. The method for determining the deviation correction of the target blast furnace charge surface under the air supply state according to claim 5, characterized in that: The second coal injection variation is used to characterize the coal injection variation after the injection gun is closed, and the coal injection variation is used to characterize the coal injection variation after the injection gun is opened.

8. A device for determining deviation correction of target blast furnace charge surface under air supply state, characterized in that: The device for determining the deviation correction of the target blast furnace material surface under the air supply state comprises: A first determination module is used to determine at least one target area under the target blast furnace based on the temperature data of each area in the target blast furnace to be detected, wherein the target area is used to characterize an area with weak airflow in the target blast furnace; A second determination module is used to determine, for any of the target areas, a temperature difference between the target temperature data of the target area and the temperature data of other areas based on the first coal injection change amount in the target area; The third determination module is used to determine whether the target airflow in any of the target areas is uniform according to the temperature difference and a preset temperature difference threshold, and to correct the material surface in the target blast furnace when the target airflow is uniform.

9. An electronic device, characterized in that: include: A processor, a memory and a bus, wherein the memory stores machine-readable instructions executable by the processor, and when the electronic device is running, the processor and the memory communicate via the bus, and the machine-readable instructions are executed by the processor when running to perform the steps of the method for determining the deviation correction of the target blast furnace charge surface under the air supply state as described in any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method for determining the deviation correction of the target blast furnace charge surface under the air supply state as described in any one of claims 1 to 7 are executed.

Images