Sintering endpoint consistency control system and method

Abstract

The present application provides a sintering endpoint consistency control system and method. By capturing a thermal imaging image of a tail section, the real image is processed and divided into multiple sintering zones. The temperature distribution of each sintering zone is used to determine the actual burn-through of the sintering production. When the corresponding sintering zone does not have a preset first temperature range, the second actual temperature zone is used to quantify the forward amplitude of the sintering endpoint. If the highest temperature on the average line of the second actual temperature zone reaches the preset threshold temperature, it is determined that the actual sintering endpoint of the current sintering zone is appropriate and the forward amplitude of the sintering endpoint is within a reasonable range. If the highest temperature on the average line of the second actual temperature zone does not reach the preset threshold temperature, it indicates that the sintering production in the current sintering zone is over-burned. By controlling the actual sintering endpoint position of each sintering zone to reasonably stabilize at the preset sintering endpoint position, local under-burning or over-burning is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of steel smelting, and in particular to a sintering endpoint consistency control system and method. Background Art

[0002] See also Figure 1 The sintering system schematic is shown below. Various powdered iron-containing raw materials are mixed with fuel and flux in a specific proportion from a batching trough. The raw materials then pass through a primary mixer and a secondary mixer, where they are mixed with water and pelletized. The raw materials are then fed into a shuttle-type distributor into a mixing trough, which maintains a constant material level for feeding the sintering trolley. Before feeding, a layer of bedding material is deposited on the sintering trolley via a bedding trough, and then the mixed material is placed on top of the bedding material. The mixed material deposited on the sintering trolley passes through an ignition furnace and a holding furnace, then through various windboxes. The exhaust from the flue completes the sintering process, forming porous sintered blocks with a certain strength. During this process, the gas extracted from the flue passes through an electrostatic precipitator, an exhaust fan, and a desulfurization process before being discharged through a chimney. The porous sintered blocks unloaded from the sintering trolley pass through a screening system and reach the finished ore bin. Because the quality of the sintered finished ore directly affects the quality of the final steel product, effective quality control is crucial.

[0003] There are many factors that affect the quality of sintered ore products, the main factors of which can be summarized into two categories: chemical composition fluctuations and improper control of the sintering endpoint. Under a certain raw material structure, in order to maximize production and optimize quality, the usual operation focus is to control the sintering endpoint, including the position control of the burn-through point along the direction of the trolley movement and the control of the consistency of the sintering endpoint. The position of the burn-through point along the direction of the trolley movement is a pre-set fixed value, generally controlled to the position of the second to last bellows on the sintering trolley 1, such as Figure 2 As shown, when the sintering trolley 1 reaches the preset sintering end position, the bottom of the combustion zone 10 just touches the base material 11. Since the combustion zone 10 has a certain thickness, when the sintering trolley 1 runs to the tail unloading position, there is still a thin layer of the combustion zone 10.

[0004] However, due to the different thickness, permeability and moisture content of the same material layer section, it is easy to cause inconsistency in the sintering end point of the same material layer section. Figure 2 As shown, the materials are completely evenly mixed at all locations on the cross-section of the material bed, with the same air permeability at all locations. The material bed thickness and vertical sintering speed remain consistent, and the combustion zone 10 is a straight line segment that simultaneously touches the bed material 11. The sintering endpoint is consistent, thus maximizing the stability of the sintering machine operation. However, actual sintering production is a multivariable, nonlinear process with time lags and multiple disturbances. Maintaining a consistent sintering endpoint is difficult, and localized over- and under-burning often occur, affecting the quality of the sintered ore, the sintering return rate, and process indicators such as solid fuel consumption. Summary of the Invention

[0005] The present application provides a sintering endpoint consistency control system and method to control the consistency technical problem of sintering endpoint.

[0006] The first aspect of the present application provides a sintering endpoint consistency control method, comprising:

[0007] Acquire a thermal imaging image of the tail section captured by a thermal imaging camera;

[0008] The tail section is divided into multiple sintering zones along the longitudinal direction of the trolley;

[0009] Based on the thermal imaging image, each sintering zone is divided using a preset first temperature range and a preset second temperature range to form a temperature distribution of each sintering zone, wherein the preset first temperature range is used to characterize the temperature interval of the combustion zone, the preset second temperature range is adjacent to the preset first temperature range, and the upper limit of the preset second temperature range is less than the lower limit of the preset first temperature range;

[0010] Determining whether the temperature distribution of each sintering zone includes a first actual temperature zone, where the first actual temperature zone is used to represent a cross-sectional area corresponding to a preset first temperature range;

[0011] If there is a sintering zone whose temperature distribution does not include the first actual temperature zone, then calculating the maximum temperature on the average line of the second actual temperature zone corresponding to the sintering zone, where the second actual temperature zone represents a cross-sectional area corresponding to the preset second temperature range;

[0012] If the maximum temperature does not reach the preset threshold temperature, the vertical sintering speed of the corresponding sintering zone is slowed down or the sintering time of the corresponding sintering zone is shortened.

[0013] In combination with the first aspect, in an implementation of the first aspect, after determining whether the temperature distribution of each sintering zone includes the first actual temperature zone, the method further includes:

[0014] If the temperature distribution of the sintering zone includes a first actual temperature zone, determining whether there is a second actual temperature zone between the first actual temperature zone of the corresponding sintering zone and the base material;

[0015] If there is a second actual temperature zone between the first actual temperature zone and the base material, the vertical sintering speed of the corresponding sintering zone is accelerated or the sintering time of the corresponding sintering zone is prolonged.

[0016] In combination with the first aspect, in an implementation of the first aspect, after determining whether a second actual temperature zone exists between the first actual temperature zone of the corresponding sintering zone and the base material, the method further includes:

[0017] If there is no second actual temperature zone between the first actual temperature zone of the corresponding sintering zone and the base material, then calculating the average line of the first actual temperature zone of the corresponding sintering zone;

[0018] Determining whether the distance between the first actual temperature zone average line and the ideal first temperature zone average line is greater than a preset threshold;

[0019] If the distance between the first actual temperature zone average line and the ideal first temperature zone average line is greater than a preset threshold, the vertical sintering speed of the corresponding sintering zone is accelerated or the sintering time of the corresponding sintering zone is extended;

[0020] The ideal first temperature zone is a cross-sectional area corresponding to a preset first temperature range under an ideal production state.

[0021] In conjunction with the first aspect, in one possible implementation of the first aspect, the method further includes:

[0022] According to the division of the sintering area, a distribution port corresponding to the sintering area is added to the auxiliary door distribution device, and the distribution port is used to distribute material to the corresponding sintering area;

[0023] If there is no first actual temperature zone in the sintering zone and the highest temperature on the average line of the second actual temperature zone does not reach the preset threshold temperature, the material distribution port of the corresponding sintering zone is controlled to increase the thickness of the material layer in the corresponding sintering zone;

[0024] In conjunction with the first aspect, in one possible implementation of the first aspect, the method further includes:

[0025] If there is a second actual temperature zone between the first actual temperature zone of the sintering zone and the base material, or the distance between the average line of the first actual temperature zone and the average line of the ideal first temperature zone is greater than a preset threshold, the material distribution port of the corresponding sintering zone is controlled to reduce the thickness of the material layer in the corresponding sintering zone.

[0026] In conjunction with the first aspect, in one implementation of the first aspect, a method for calculating the second actual temperature zone average line, the first actual temperature zone average line, and the ideal first temperature zone average line includes:

[0027] Establish a rectangular coordinate system with the width of the tail section as the x-axis and the height of the tail section and the direction from the bottom of the trolley to the material surface as the positive y-axis;

[0028] Taking the arithmetic average of the highest and lowest y-coordinate values of points with the same x-coordinate in the first actual temperature zone, the second actual temperature zone, or the preset first temperature zone to obtain the center line of the corresponding temperature zone;

[0029] Take the arithmetic average of the y-coordinate values of each point in the center line to obtain the average line of the corresponding temperature zone.

[0030] In conjunction with the first aspect, in one possible implementation of the first aspect, obtaining a thermal imaging image of the tail section captured by a thermal imaging camera includes:

[0031] Continuously collect multiple thermal images of the sintering trolley tail section;

[0032] Multiple thermal images are superimposed to form a thermal imaging image.

[0033] A second aspect of the present application provides a sintering endpoint consistency control system, comprising a central control system and a thermal imaging camera installed on a tail platform of a sintering machine, wherein the thermal imaging camera is used to obtain a thermal imaging image of a cross section of the tail of the sintering machine during actual sintering production. When executing a sintering endpoint consistency control method provided in the first aspect of the present application, the central control system is configured as follows:

[0034] Acquire a thermal imaging image of the tail section captured by a thermal imaging camera;

[0035] The tail section is divided into multiple sintering zones along the longitudinal direction of the trolley;

[0036] Based on the thermal imaging image, each sintering zone is divided using a preset first temperature range and a preset second temperature range to form a temperature distribution of each sintering zone, wherein the preset first temperature range is used to characterize the temperature interval of the combustion zone, the preset second temperature range is adjacent to the preset first temperature range, and the upper limit of the preset second temperature range is less than the lower limit of the preset first temperature range;

[0037] Determining whether the temperature distribution of each sintering zone includes a first actual temperature zone, where the first actual temperature zone is used to represent a cross-sectional area corresponding to a preset first temperature range;

[0038] If there is a sintering zone whose temperature distribution does not include the first actual temperature zone, then calculating the maximum temperature on the average line of the second actual temperature zone corresponding to the sintering zone, where the second actual temperature zone represents a cross-sectional area corresponding to the preset second temperature range;

[0039] If the maximum temperature does not reach the preset threshold temperature, the vertical sintering speed of the corresponding sintering zone is slowed down or the sintering time of the corresponding sintering zone is shortened.

[0040] In conjunction with the second aspect, in one implementation of the second aspect, the central control system is further configured as follows:

[0041] After determining whether the temperature distribution of each sintering zone includes the first actual temperature zone, the method further includes:

[0042] If the temperature distribution of the sintering zone includes a first actual temperature zone, determining whether there is a second actual temperature zone between the first actual temperature zone of the corresponding sintering zone and the base material;

[0043] If there is a second actual temperature zone between the first actual temperature zone and the base material, the vertical sintering speed of the corresponding sintering zone is accelerated or the sintering time of the corresponding sintering zone is extended;

[0044] After determining whether there is a second actual temperature zone between the first actual temperature zone of the corresponding sintering zone and the base material, the method further includes:

[0045] If there is no second actual temperature zone between the first actual temperature zone of the corresponding sintering zone and the base material, then calculating the average line of the first actual temperature zone of the corresponding sintering zone;

[0046] Determining whether the distance between the first actual temperature zone average line and the ideal first temperature zone average line is greater than a preset threshold;

[0047] If the distance between the first actual temperature zone average line and the ideal first temperature zone average line is greater than a preset threshold, the vertical sintering speed of the corresponding sintering zone is accelerated or the sintering time of the corresponding sintering zone is extended;

[0048] The ideal first temperature zone is a cross-sectional area corresponding to a preset first temperature range under an ideal production state.

[0049] In conjunction with the second aspect, in one possible implementation of the second aspect, the method further includes a material distribution port above each sintering zone; and the central control system is further configured to:

[0050] If the highest temperature on the average line of the second actual temperature zone in the sintering zone does not reach the preset threshold temperature, the material distribution port of the corresponding sintering zone is controlled to increase the thickness of the material layer in the corresponding sintering zone;

[0051] If there is a second actual temperature zone between the first actual temperature zone of the sintering zone and the base material, or the distance between the average line of the first actual temperature zone and the average line of the ideal first temperature zone is greater than a preset threshold, the material distribution port of the corresponding sintering zone is controlled to reduce the thickness of the material layer in the corresponding sintering zone.

[0052] It can be seen from the above technical solution that the present application provides a sintering endpoint consistency control system and method, including: obtaining a thermal imaging image of the tail section captured by a thermal imaging camera; dividing the tail section into multiple sintering zones along the longitudinal direction of the trolley; based on the thermal imaging image, using a preset first temperature range and a preset second temperature range, dividing each sintering zone to form a temperature distribution of each sintering zone, wherein the preset first temperature range is used to characterize the temperature interval of the combustion zone, the preset second temperature range is adjacent to the preset first temperature range, and the upper limit of the preset second temperature range is less than the lower limit of the preset first temperature range; separately judging whether the temperature distribution of each sintering zone includes a first actual temperature zone, and the first actual temperature zone is used to represent the cross-sectional area corresponding to the preset first temperature range; if there is a sintering zone whose temperature distribution does not include the first actual temperature zone, then calculating the highest temperature on the average line of the second actual temperature zone of the corresponding sintering zone, and the second actual temperature zone represents the cross-sectional area corresponding to the preset second temperature range; if the highest temperature does not reach the preset threshold temperature, then slowing down the vertical sintering speed of the corresponding sintering zone or shortening the sintering time of the corresponding sintering zone.

[0053] This application processes the real image by shooting the cross-section thermal imaging image of the tail of the machine, divides it into multiple sintering zones, and judges the actual burn-through situation of the sintering production by the temperature distribution of each sintering zone. When the corresponding sintering zone does not have a preset first temperature range, the second actual temperature zone is used to quantitatively judge the amplitude of the sintering end point. If the highest temperature on the average line of the second actual temperature zone reaches the preset threshold temperature, it is judged that the actual sintering end point of the current sintering zone is appropriate, and the amplitude of the sintering end point is within a reasonable range. If the highest temperature on the average line of the second actual temperature zone does not reach the preset threshold temperature, it reflects that after the sintering material surface is ignited to form a combustion zone, before the trolley moves to the tail of the sintering machine, the combustion zone has reached the bottom material layer of the sintering trolley, and the sintering production of the current sintering zone is overburned. By controlling the actual sintering end point position of each sintering zone to be reasonably stabilized at the preset sintering end point position, local underburning or overburning is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 Schematic diagram of sintering system provided by prior art;

[0055] Figure 2 A schematic diagram of a cross-section of a material layer provided by the prior art;

[0056] Figure 3 Schematic diagram of tail section formation and thermal imaging provided in an embodiment of the present application;

[0057] Figure 4 The ideal tail section temperature distribution diagram provided in the embodiment of the present application;

[0058] Figure 5The actual tail section temperature distribution diagram provided in the embodiment of this application;

[0059] Figure 6 A schematic diagram of an actual tail section provided in an embodiment of the present application;

[0060] Figure 7 This is a schematic diagram of the center lines of each temperature zone of the actual tail section provided in the embodiment of the present application;

[0061] Figure 8 This is a schematic diagram of the superposition of the actual average line of each temperature zone of the tail section and the ideal average line provided in the embodiment of the present application;

[0062] Figure 9 This is a schematic diagram of the structure of the sintering endpoint consistency control system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0063] In order to make the objectives, technical solutions and advantages of this application clearer, the implementation methods of this application will be further described in detail below with reference to the accompanying drawings.

[0064] See also Figure 1 The schematic diagram of the sintering system shown is an application scenario of an embodiment of the present application. In this application scenario, controlling the sintering endpoint is an important means of sintering control, which includes controlling the position of the burn-through point along the direction of the trolley's movement and controlling the consistency of the sintering endpoint. Due to factors such as the thickness, permeability, and moisture of the material layer in sintering production, the vertical sintering speed is often uneven even on the same material layer cross section. Therefore, it is impossible to ensure the consistency of the sintering endpoint in the horizontal direction of the trolley on the same material layer cross section, which often results in local over-burning and under-burning, affecting the stability of the sintered ore quality.

[0065] In order to control the consistency of the sintering end point, an embodiment of the present application provides a sintering end point consistency control system and method. The sintering end point is controlled in partitions through the thermal imaging image of the tail section. This method has a short lag time, high adjustment timeliness, and good control effect. The sintering end point consistency control method provided by the embodiment of the present application is explained below with reference to the accompanying drawings.

[0066] As the sintering trolley 1 moves, the combustion zone 10 gradually moves downward. The mixed material 13 passed by the combustion zone 10 is roasted into sintered ore 12. The speed at which the combustion zone 10 moves downward is called the sintering speed, which is represented by LV in mm / min. -1 ; The thickness of the material layer on the sintering machine is represented by H, in units of mm; there is a base material 11 under the sintering mixture 13, and the base material 11 is a finished sintered ore of a certain particle size. The thickness can be represented by PH, in units of mm; in the process of stable sintering production, the sintering speed can be approximately considered to be a constant value.

[0067] After the sintered ore passes through the ignition furnace and begins the sintering process, its sintering time ST (unit: min) is:

[0068] ST = (H-PH) / LV;

[0069] Controlling the sintering end point is an important means of sintering control. During the sintering process, after the mixed material 13 is placed on the sintering trolley, the sintering end point is generally controlled at the penultimate bellows of the sintering machine to achieve the most reasonable use of the sintering machine area. That is, the ideal sintering end point position can be regarded as a point at a fixed distance from the ignition position of the sintering material surface, that is, the moving distance S of the trolley after the ignition of the sintering material surface has an optimal value S0, and the position corresponding to S0 is the sintering end point position. In production, the sintering end point is generally detected by detecting the flue gas temperature of the bellows. A temperature detection element is set on each bellows of the sintering machine, and the bellows with the highest flue gas temperature is the bellows corresponding to the position of the sintering end point.

[0070] During the sintering time ST, the relationship between the sintering machine trolley moving distance S (unit: m), the sintering machine trolley speed SV (unit: m / min), and the sintering time ST is as follows:

[0071] S = ST*SV;

[0072]

[0073] It can be seen that the thickness of the material layer and the sintering speed in the transverse direction of the sintering machine will affect the transverse sintering consistency of the sintering machine. The embodiment of the present application controls the consistency of the sintering end point by using the thermal imaging image of the tail section in actual sintering production. The method specifically includes steps S1 to S5.

[0074] S1. Obtain a thermal imaging image of the tail section captured by a thermal imaging camera.

[0075] See also Figure 3 A sintering trolley 1, carrying finished sintered ore 12, is driven forward by the sintering head and tail wheels 2. At the rear of the sintering machine, the trolley 1 begins to tilt, and the continuous sintered material surface begins to break at the tilted position. When the tail wheel drives the trolley to an inclination angle A, the entire piece of finished sintered ore 12 on the tilted trolley slides off the trolley. The cross-section of the sintered ore on the adjacent trolley, i.e., the tail section, can be fully displayed to the camera. A thermal imaging camera 4 installed on the tail platform of the sintering machine can capture a thermal image of the tail section.

[0076] In addition, a sensor can be installed at the tail of the sintering machine to track the inclination of the sintering trolley 1. When the inclination of the sintering trolley 1 reaches A, the thermal imaging camera 4 is controlled to take a picture of the tail section of the sintering machine.

[0077] In some embodiments, the thermal imaging image obtained in the embodiments of the present application may be a processed thermal imaging image, and the processed thermal imaging image may be obtained by the following steps:

[0078] Step 1: Continuously collect multiple thermal images of the cross section of the sintering trolley tail.

[0079] During actual shooting by the thermal imaging device 101 , multiple consecutive photos may be collected for subsequent secondary processing.

[0080] It should be noted that the thermal imaging image refers to a cross-sectional photo of the tail of the aircraft directly taken by the thermal imaging camera 4 .

[0081] Step 2: Overlay multiple thermal images for secondary processing to form a thermal image.

[0082] By superimposing multiple consecutive thermal images, a thermal imaging image can be formed by taking the average of the overlapping imaging areas.

[0083] Among them, in actual sintering production, local combustion points may occasionally appear. For example, in multiple consecutive thermal imaging images, a local combustion area appears in one image, while the corresponding combustion area does not appear in the other imaging images. At this time, it can be considered that this local combustion area is caused by uneven fuel distribution in a local area of the sintering mixture, and the image with the local combustion area can be eliminated.

[0084] In the actual system configuration, an image processor can be built into the thermal imaging camera 4, and the image processor inside the thermal imaging camera 4 can perform secondary processing operations on multiple continuously collected thermal images. Alternatively, an image processor connected to the camera signal can be configured outside the thermal imaging camera 41 to perform secondary processing operations.

[0085] The thermal imaging image obtained by the above method avoids excessive noise, better reflects the temperature of the tail section of the actual sintering production, and is more conducive to the subsequent judgment of the burn-through position.

[0086] In some embodiments, if a burning area appears in the thermal imaging image and is located in an isolated position, the burning area is filtered, wherein the isolated position is an area that is higher than 1 / 3 of the material layer thickness relative to the bottom of the trolley.

[0087] Specifically, an isolated combustion area appears in the upper part of the thermal imaging image away from the combustion zone and close to the material surface of the sintering trolley (for example, an area that is more than 1 / 3 of the material layer thickness relative to the bottom plane of the trolley). That is, the isolated position is an area that is more than 1 / 3 of the material layer thickness relative to the bottom of the trolley. It can be selected to filter it to remove noise.

[0088] S2. The tail section is divided into multiple sintering zones along the longitudinal direction of the trolley.

[0089] The height direction of the trolley is the longitudinal direction of the trolley. The tail section is divided into multiple sintering zones along the longitudinal direction of the trolley. Each sintering zone is taken as the smallest unit to judge the sintering condition of each sintering zone, so as to avoid local over-burning and under-burning and control the consistency of the sintering end point of the sintering machine.

[0090] Theoretically, the more sintering areas are divided, the more precise the control of sintering endpoint consistency will be. However, considering factors such as pipeline diameter and construction and maintenance, it is actually impossible to subdivide infinitely. In addition, the gas will diffuse after entering the surface of the sintering mixture. If there are too many partitions, the mutual interference between adjacent areas will be difficult to distinguish. If there are too few partitions, the ability to adjust the sintering state of each area will be poor. For example, dividing the area into two areas will appear slightly rough.

[0091] For example, the width of a large sintering machine trolley is 5500mm, which is evenly divided into 5 sintering zones. The width of each zone is 1100mm, which is a relatively comfortable division in engineering.

[0092] In addition, in some other embodiments, it is also possible to divide it into other numbers of areas, which is not specifically limited in the embodiments of the present application.

[0093] S3. Based on the thermal imaging image, each sintering zone is divided by using a preset first temperature range and a preset second temperature range to form a temperature distribution of each sintering zone.

[0094] When the bottom of the combustion zone 10 just contacts the base material layer, it is the end point of sintering. Under the theoretical production state, the sintering end point is at a preset fixed position. Since the combustion zone 10 has a certain thickness, when the sintering trolley 1 runs from the preset sintering end position to the unloading position, there is still a thin layer of the combustion zone 10. Under ideal conditions, the sintered ore is evenly generated, and there is a narrow straight section of the combustion zone 10 near the base material 11 at the tail of the sintering machine.

[0095] See also Figure 4 , which is an ideal tail section temperature distribution diagram provided in an embodiment of the present application. During the sintering production process, air continuously passes through the material layer, providing air for the combustion zone 10. At the same time, the air also cools the sintered finished ore 12 area above the already formed combustion zone 10. Under ideal conditions, the temperature distribution of the tail section at the tail of the sintering machine is a temperature distribution that gradually decreases from bottom to top. In this embodiment of the present application, an ideal temperature distribution diagram is theoretically synthesized at the preset sintering endpoint, which serves as a reference benchmark for controlling the consistency of the sintering endpoint in actual sintering production.

[0096] The ideal temperature distribution diagram can be determined by theoretical calculations, and the actual on-site data is used to correct and establish an ideal temperature distribution diagram that conforms to the characteristics of each sintering machine. The actual on-site data includes factors such as the raw material conditions, equipment operating conditions, and altitude of each sintering machine. The ideal temperature distribution diagram can be specifically set according to actual conditions, and the embodiments of this application will not be repeated here.

[0097] Under ideal conditions, the vertical combustion velocity at each position of the tail section is the same, and the cooling air volume is evenly distributed, so the distribution boundary of each temperature zone is a straight line. Figure 4 The ideal temperature distribution diagram shown includes a cross-sectional area corresponding to a preset first temperature range (preset first temperature zone) and a cross-sectional area corresponding to a preset second temperature range (preset second temperature zone). The preset first temperature range is used to characterize the temperature interval of the combustion zone. The preset second temperature range is adjacent to the preset first temperature range, and the upper limit of the preset second temperature range is less than the lower limit of the preset first temperature range.

[0098] In addition, if Figure 4 The temperature distribution diagram shown may also include a cross-sectional area corresponding to a preset third temperature range (preset third temperature zone) and a cross-sectional area corresponding to a preset fourth temperature range (preset fourth temperature zone). The preset third temperature range is adjacent to the preset second temperature range, and the preset fourth temperature range is adjacent to the preset third temperature range. The upper limit of the preset third temperature range is less than the lower limit of the preset second temperature range, and the upper limit of the preset fourth temperature range is less than the lower limit of the preset third temperature range.

[0099] For example, the highest temperature in the combustion zone 10 is 1350°C. When the sintering trolley moves to the tail of the sintering machine, the temperature of the surface sintered ore cools to 50°C. Ideally, the preset first temperature range is 1100-1350°C, and the preset thickness of the first temperature zone is 50mm; the preset second temperature range is 600-1100°C, and the preset thickness of the second temperature zone is 150mm; the preset third temperature range is 300-600°C, and the preset thickness of the third temperature zone is 250mm; the preset fourth temperature range is 50-300°C, and the preset thickness of the fourth temperature zone is 300mm.

[0100] However, in actual sintering production, the combustion zone at the tail section of the sintering machine typically takes the form of a long, curved strip. The sintering endpoints vary across the sintering machine, and the boundaries of each temperature zone distribution are typically curved. After acquiring the thermal imaging image, the temperature of each sintering zone determined by the thermal imaging image is then divided into each sintering zone at the tail section using a preset first temperature range and a preset second temperature range to form a temperature distribution for each sintering zone. In some embodiments, the tail section can also be divided using a preset third temperature range and a preset fourth temperature range.

[0101] like Figure 5As shown, the present application exemplarily provides an actual tail section temperature distribution diagram, firstly, after determining the temperature of each point in the section based on the thermal imaging image of the tail section, the tail section is divided into a preset first temperature range, a preset second temperature range, a preset third temperature range and a preset fourth temperature range, to form the following Figure 5 The temperature distribution diagram is shown.

[0102] It should be noted that in some embodiments, the temperature distribution of each sintering zone can be determined after each sintering zone is divided, and then the corresponding temperature distribution can be determined based on the temperature determined for each sintering zone using a preset first temperature range, a preset second temperature range, a preset third temperature range, and a preset fourth temperature range. In other, simpler embodiments, the temperature distribution of the entire cross-section can be determined based on a thermal imaging image using the preset first temperature range, the preset second temperature range, the preset third temperature range, and the preset fourth temperature range. The temperature distribution of the entire cross-section can then be divided according to each corresponding sintering zone to obtain the temperature distribution corresponding to each sintering zone.

[0103] Figure 5 The temperature distribution of the entire cross-section shown includes a first actual temperature zone, a second actual temperature zone, a third actual temperature zone and a fourth actual temperature zone. The first actual temperature zone represents the cross-sectional area corresponding to the preset first temperature range, the second actual temperature zone represents the cross-sectional area corresponding to the preset second temperature range, the third actual temperature zone represents the cross-sectional area corresponding to the preset third temperature range, and the fourth actual temperature zone represents the cross-sectional area corresponding to the preset fourth temperature range.

[0104] It should be noted that the temperature distribution of the tail section in actual sintering production may include multiple first actual temperature zones or second actual temperature zones, that is, the first actual temperature zone and the second actual temperature zone may not be continuous in one tail section. Figure 6 As shown, it reflects the Figure 5 The corresponding tail section schematic diagram shows that the first actual temperature zone is the combustion zone temperature range. There are second actual temperature zones on both sides of the trolley below the first actual temperature zone, i.e., the combustion zone range. It can be deduced that the combustion zones on both sides of the trolley have not advanced to the bottom material layer. The second actual temperature zone below the first actual temperature zone on both sides is still the sintering mixture raw material, which has not been roasted into sintered ore. The second actual temperature zone, the third actual temperature zone and the fourth actual temperature zone above the combustion zone have all formed sintered ore.

[0105] S4. Determine whether the temperature distribution of each sintering zone includes a first actual temperature zone, where the first actual temperature zone is used to represent a cross-sectional area corresponding to a preset first temperature range.

[0106] Combine Figure 5 and Figure 6According to the division of the tail section into multiple sintering zones along the longitudinal direction of the trolley, the sintering conditions of each sintering zone can be judged separately, so as to carry out targeted control and ensure the consistency of the sintering end point.

[0107] Exemplarily, the tail section is divided into five sintering zones along the longitudinal direction of the trolley, among which Zone 1 is the second actual temperature zone, the first actual temperature zone, the second actual temperature zone, the third actual temperature zone and the fourth actual temperature zone from bottom to top (from the bottom of the trolley to the material surface); Zone 2 is the second actual temperature zone, the first actual temperature zone, the second actual temperature zone, the third actual temperature zone and the fourth actual temperature zone from bottom to top; Zone 3 is the second actual temperature zone, the third actual temperature zone and the fourth actual temperature zone from bottom to top; Zone 4 is the second actual temperature zone, the third actual temperature zone and the fourth actual temperature zone from bottom to top; Zone 5 is the second actual temperature zone, the first actual temperature zone, the second actual temperature zone, the third actual temperature zone and the fourth actual temperature zone from bottom to top.

[0108] After determining the temperature distribution of each sintering zone, it is first determined whether the temperature distribution of each sintering zone includes a first actual temperature zone.

[0109] It should be noted that in actual sintering production, there is a phenomenon of over-burning, that is, the actual sintering end position is much further forward than the preset sintering end position. Before the sintering trolley moves to the tail of the sintering machine, the combustion zone has reached the bottom material layer of the sintering trolley. At the tail of the machine, the material has been roasted and there is no combustion area. At this time, the temperature distribution does not include the first actual temperature zone. For example, Figure 5 Zones 2 and 3.

[0110] However, not all situations that do not include the first actual temperature zone require adjustment. If the actual sintering end point position is reasonably closer to the preset sintering end point position, it can be considered that the sintering end point position of the current sintering production is properly controlled.

[0111] S5. If the temperature distribution of the sintering zone does not include the first actual temperature zone, calculate the maximum temperature on the average line of the second actual temperature zone corresponding to the sintering zone, where the second actual temperature zone represents a cross-sectional area corresponding to the preset second temperature range.

[0112] It should be noted that if the tail section is imaged using visible light, the section will appear completely black, and no combustion zone can be detected. In this case, the only logical inference is that the sintering endpoint is close to the front (i.e., the sintered ore has been fully roasted by the time the trolley reaches the tail section). However, the extent of this closeness cannot be quantitatively determined. Sintering production can only be adjusted by observing a bright line in the visible light image of the tail section and then making parameter feedback adjustments based on the position of the bright line. However, with thermal imaging, the same situation can be adjusted based on the average line of the second actual temperature zone.

[0113] In some embodiments, the maximum temperature on the average line of the second actual temperature zone corresponding to the sintering zone can be calculated using the following method:

[0114] The first step is to establish a rectangular coordinate system with the width of the tail section as the x-axis and the height of the tail section and the direction from the bottom of the trolley to the material surface as the y-axis.

[0115] The width of the tail section is taken as the x-axis, and the height of the tail section and the direction from the bottom of the trolley to the material surface is taken as the y-axis. This is only an example in this embodiment. In other possible embodiments, different coordinate systems can also be used for calculation.

[0116] In the second step, the highest and lowest y-coordinate values of the points with the same x-coordinate in the second actual temperature zone of the corresponding sintering zone are averaged to obtain the center line of the second actual temperature zone of the corresponding sintering zone.

[0117] That is, the corresponding middle value y is selected for each x-coordinate in the second actual temperature zone, and the arithmetic mean values y corresponding to different x-coordinates are connected into a line as the center line of the second actual temperature zone.

[0118] like Figure 7 The center line of each temperature zone is shown as an example. The center line of the first actual temperature zone can also be obtained by the above method, which will not be described in detail in this embodiment of the present application.

[0119] It should be noted that in the above process of determining the center line, in other simpler implementations, the center line of each temperature zone in the entire cross section can be determined, and then divided into the center lines of each sintering zone according to the sintering zone.

[0120] The third step is to take the arithmetic average of the y-coordinate values of each point in the center line of the second actual temperature zone of the corresponding sintering zone to obtain the average line of the second actual temperature zone.

[0121] It should be noted that this step needs to be calculated with the divided sintering zone as the smallest unit.

[0122] That is to say, the y-coordinate values of each point in the center line of the second actual temperature zone of each sintering zone are taken as the arithmetic average, and y = the arithmetic average of the corresponding sintering zone is used as the second actual temperature zone average line of the corresponding sintering zone. The value of the second actual temperature zone average line is the arithmetic average, and the second actual temperature zone average center line is parallel to the x-axis.

[0123] For example, for example, Figure 7 As shown, Zones 3 and 4 do not include the first actual temperature zone, so the y coordinates of each point on the midline of the second actual temperature zone in Zone 3 are taken as the arithmetic average to obtain w 32 , that is, w 32 Indicates the value of the average line of the second actual temperature zone of sintering zone 3. The average line of the second actual temperature zone of sintering zone 3 is y=w 32; Take the arithmetic average of the y coordinates of each point on the center line of the second actual temperature zone in zone 4 to obtain w 42 , that is, w 42 Indicates the value of the average line of the second actual temperature zone of sintering zone 4. The average line of the second actual temperature zone of sintering zone 4 is y=w 42 .

[0124] The fourth step is to determine the highest temperature on the average line of the second actual temperature zone.

[0125] By adopting the above method, image processing is performed on the second actual temperature zone, and the average line of the second actual temperature zone is used to represent the second actual temperature zone, accidental factors can be filtered out and the actual sintering situation can be simply reflected.

[0126] S6. If the maximum temperature does not reach the preset threshold temperature, slow down the vertical sintering speed of the corresponding sintering zone or shorten the sintering time of the corresponding sintering zone.

[0127] If the highest temperature on the average line of the second actual temperature zone does not reach the preset threshold temperature, it means that the actual sintering end position of the corresponding sintering zone is much closer to the front of the preset sintering end position, and it is necessary to slow down the vertical sintering speed of the corresponding sintering zone or shorten the sintering time of the corresponding sintering zone.

[0128] In some embodiments, further comprising:

[0129] S7. If the maximum temperature reaches the preset threshold temperature, no further adjustment is required for the corresponding sintering zone.

[0130] If the temperature distribution does not include the first actual temperature zone, but the highest temperature on the average line of the second actual temperature zone reaches the preset threshold temperature (for example, 1000°C), it is judged that the sintering production burn-through position corresponding to the current sintering zone is appropriate, and the range of the sintering end point is within a reasonable range.

[0131] For example, sintering zone 3 y=w 32 The highest temperature on the line is 950℃ and the preset threshold temperature is 1000℃, so it is necessary to slow down the vertical sintering speed of sintering zone 3 or shorten the sintering time of sintering zone 3.

[0132] For example, sintering zone 4 y=w 42 The highest temperature on the line is 1050℃, and the preset threshold temperature is 1000℃, so there is no need to make any further adjustments to sintering zone 4.

[0133] In some embodiments, after determining whether the temperature distribution of each sintering zone includes the first actual temperature zone, the following method may be used:

[0134] S8. If the temperature distribution of the sintering zone includes a first actual temperature zone, determine whether there is a second actual temperature zone between the first actual temperature zone of the corresponding sintering zone and the base material; if there is a second actual temperature zone between the first actual temperature zone and the base material, accelerate the vertical sintering speed of the corresponding sintering zone or extend the sintering time of the corresponding sintering zone.

[0135] If there is a second actual temperature zone between the first actual temperature zone and the bottom material belt, it means that when the sintering trolley moves to the end of the sintering, there is still sintering mixture raw material. It is necessary to speed up the vertical sintering speed or slow down the trolley speed or reduce the thickness of the sintering material layer. The current sintering production is under-fired.

[0136] Combine Figure 5 and Figure 6 There is a second actual temperature zone between the first actual temperature zone and the bottom material in sintering zones 1, 2 and 5, which means that when the sintering trolley moves to the end of the sintering, there is still sintering mixture raw material, and sintering zones 1, 2 and 5 are under-burned.

[0137] In some embodiments, after determining whether a second actual temperature zone exists between the first actual temperature zone corresponding to the sintering zone and the base material, the following method may be used:

[0138] S901. If there is no second actual temperature zone between the first actual temperature zone of the corresponding sintering zone and the base material, calculate an average line of the first actual temperature zone of the corresponding sintering zone.

[0139] S902: Determine whether the distance between the first actual temperature zone average line and the ideal first temperature zone average line is greater than a preset threshold.

[0140] S903: If the distance between the first actual temperature zone average line and the ideal first temperature zone average line is greater than a preset threshold, the vertical sintering speed of the corresponding sintering zone is accelerated or the sintering time of the corresponding sintering zone is extended.

[0141] The ideal first temperature zone is a cross-sectional area corresponding to a preset first temperature range under an ideal production state.

[0142] For example, see Figure 8 , showing the ideal first temperature zone average line w1, the ideal second temperature zone average line w2, the first actual temperature zone average line w 11 , the average line of the second actual temperature zone of sintering zone 4 w 42 And the average line of the first actual temperature zone of sintering zone 5 w 51 The above is only an example. The calculation method of the average line of each temperature zone has been explained in detail in step S5 and will not be repeated here.

[0143] In some embodiments, after determining whether the distance between the first actual temperature zone average line and the preset first temperature zone average line is greater than a preset threshold, the following method may be used:

[0144] S904: If the distance between the first actual temperature zone average line and the preset first temperature zone average center line is less than or equal to a preset threshold, the current sintering production burn-through position of the corresponding sintering zone is appropriate.

[0145] In some possible implementations, the embodiment of the present application adds a distribution port corresponding to the sintering zone at the auxiliary door distribution device according to the division of the sintering zone, and the distribution port is used to distribute material to the corresponding sintering zone.

[0146] If there is no first actual temperature zone in the sintering zone and the highest temperature on the average line of the second actual temperature zone does not reach the preset threshold temperature, the material distribution port of the corresponding sintering zone is controlled to increase the thickness of the material layer in the corresponding sintering zone;

[0147] If there is a second actual temperature zone between the first actual temperature zone of the sintering zone and the base material, or the distance between the average line of the first actual temperature zone and the average line of the ideal first temperature zone is greater than a preset threshold, the material distribution port of the corresponding sintering zone is controlled to reduce the thickness of the material layer in the corresponding sintering zone.

[0148] For example, in a certain production scenario, a second actual temperature zone exists between the first actual temperature zone and the base material in zones 1, 2, and 5. Zones 1, 2, and 5 are underfired, and unfired raw material remains at the tail of the sintering machine. Zone 3 lacks a first actual temperature zone, and the highest temperature on the average line of the second actual temperature zone does not reach the preset threshold temperature. Zone 3 is overfired. Zone 4 lacks a first actual temperature zone, and the highest temperature on the average line of the second actual temperature zone reaches the preset threshold temperature. Therefore, sintering zone 4 is more appropriate. Based on this situation, the material distribution openings in zones 1, 2, and 5 are controlled to reduce the material layer thickness in the corresponding sintering zones, while the material distribution opening in zone 3 is controlled to increase the material layer thickness.

[0149] The following are system embodiments of the present application, which can be used to implement the method embodiments of the present application. For details not disclosed in the system embodiments of the present application, please refer to the method embodiments of the present application.

[0150] See also Figure 9 , the embodiment of the present application provides a sintering endpoint consistency control system. Figure 9 As shown, the system has the function of implementing the above-mentioned sintering endpoint consistency control method. This function can be implemented by hardware or by hardware executing corresponding software. The system can include a central control system and a thermal imaging camera installed on the tail platform of the sintering machine. The thermal imaging camera is used to capture thermal imaging images of the cross-section of the tail platform of the sintering machine during actual sintering production.

[0151] The central control system is configured to perform the following operations:

[0152] S1. Obtain a thermal imaging image of the tail section captured by a thermal imaging camera.

[0153] S2. Divide the tail section into multiple sintering zones along the longitudinal direction of the trolley;

[0154] S3. Based on the thermal imaging image, divide each sintering zone into a preset first temperature range and a preset second temperature range to form a temperature distribution of each sintering zone, wherein the preset first temperature range is used to represent the temperature interval of the combustion zone, the preset second temperature range is adjacent to the preset first temperature range, and the upper limit of the preset second temperature range is less than the lower limit of the preset first temperature range;

[0155] S4. Determine whether the temperature distribution of each sintering zone includes a first actual temperature zone, where the first actual temperature zone is used to represent a cross-sectional area corresponding to a preset first temperature range;

[0156] S5. If the temperature distribution of the sintering zone does not include the first actual temperature zone, calculate the maximum temperature on the average line of the second actual temperature zone corresponding to the sintering zone, where the second actual temperature zone represents a cross-sectional area corresponding to the preset second temperature range;

[0157] S6. If the maximum temperature does not reach the preset threshold temperature, slow down the vertical sintering speed of the corresponding sintering zone or shorten the sintering time of the corresponding sintering zone.

[0158] The central control system is further configured to:

[0159] After determining whether the temperature distribution of each sintering zone includes the first actual temperature zone, the method further includes:

[0160] If the temperature distribution of the sintering zone includes a first actual temperature zone, determining whether there is a second actual temperature zone between the first actual temperature zone of the corresponding sintering zone and the base material;

[0161] If there is a second actual temperature zone between the first actual temperature zone and the base material, the vertical sintering speed of the corresponding sintering zone is accelerated or the sintering time of the corresponding sintering zone is extended;

[0162] After determining whether there is a second actual temperature zone between the first actual temperature zone of the corresponding sintering zone and the base material, the method further includes:

[0163] If there is no second actual temperature zone between the first actual temperature zone of the corresponding sintering zone and the base material, then calculating the average line of the first actual temperature zone of the corresponding sintering zone;

[0164] Determining whether the distance between the first actual temperature zone average line and the ideal first temperature zone average line is greater than a preset threshold;

[0165] If the distance between the first actual temperature zone average line and the ideal first temperature zone average line is greater than a preset threshold, the vertical sintering speed of the corresponding sintering zone is accelerated or the sintering time of the corresponding sintering zone is extended;

[0166] The ideal first temperature zone is a cross-sectional area corresponding to a preset first temperature range under an ideal production state.

[0167] In one implementation, the sintering endpoint consistency control system further includes a material distribution port above each sintering zone, each material distribution port is connected to a central control system by signal, and the central control system is further configured as follows:

[0168] If the highest temperature on the average line of the second actual temperature zone in the sintering zone does not reach the preset threshold temperature, the material distribution port of the corresponding sintering zone is controlled to increase the thickness of the material layer in the corresponding sintering zone.

[0169] If there is a second actual temperature zone between the first actual temperature zone of the sintering zone and the base material, or the distance between the average line of the first actual temperature zone and the average line of the ideal first temperature zone is greater than a preset threshold, the material distribution port of the corresponding sintering zone is controlled to reduce the thickness of the material layer in the corresponding sintering zone.

[0170] It can be seen from the above technical solution that the embodiment of the present application provides a sintering end point consistency control system and method, including: obtaining a thermal imaging image of the tail section captured by a thermal imaging camera; dividing the tail section into multiple sintering zones along the longitudinal direction of the trolley; based on the thermal imaging image, using a preset first temperature range and a preset second temperature range, dividing each sintering zone to form a temperature distribution of each sintering zone, wherein the preset first temperature range is used to characterize the temperature interval of the combustion zone, the preset second temperature range is adjacent to the preset first temperature range, and the upper limit of the preset second temperature range is less than the lower limit of the preset first temperature range; separately judging whether the temperature distribution of each sintering zone includes a first actual temperature zone, and the first actual temperature zone is used to represent the cross-sectional area corresponding to the preset first temperature range; if there is a sintering zone whose temperature distribution does not include the first actual temperature zone, then calculating the highest temperature on the average line of the second actual temperature zone of the corresponding sintering zone, and the second actual temperature zone represents the cross-sectional area corresponding to the preset second temperature range; if the highest temperature does not reach the preset threshold temperature, then slowing down the vertical sintering speed of the corresponding sintering zone or shortening the sintering time of the corresponding sintering zone.

[0171] The embodiment of the present application takes a thermal imaging image of the tail section, processes the real image and divides it into multiple sintering zones, and judges the actual sintering production through the temperature distribution of each sintering zone. When the corresponding sintering zone does not have a preset first temperature range, the second actual temperature zone is used to quantify the amplitude of the sintering end point. If the highest temperature on the average line of the second actual temperature zone reaches the preset threshold temperature, it is judged that the actual sintering end point of the current sintering zone is appropriate, and the amplitude of the sintering end point is within a reasonable range. If the highest temperature on the average line of the second actual temperature zone does not reach the preset threshold temperature, it reflects that after the sintering material surface is ignited to form a combustion zone, before the trolley moves to the tail of the sintering machine, the combustion zone has reached the bottom material layer of the sintering trolley, and the sintering production of the current sintering zone is over-burned. By controlling the actual sintering end point position of each sintering zone to be reasonably stabilized at the preset sintering end point position, local under-burning or over-burning is avoided, and the consistency of the sintering end point is maintained.

[0172] The present application has been described in detail above with reference to specific embodiments and exemplary examples. However, these descriptions should not be construed as limiting the present application. Those skilled in the art will appreciate that, without departing from the spirit and scope of the present application, various equivalent substitutions, modifications, or improvements may be made to the technical solutions and implementations of the present application, all of which fall within the scope of the present application. The scope of protection of the present application shall be determined by the appended claims.

Claims

1. A sintering endpoint consistency control method, characterized in that: include: Acquire a thermal imaging image of the tail section captured by a thermal imaging camera; The tail section is divided into multiple sintering zones along the longitudinal direction of the trolley; Based on the thermal imaging image, each sintering zone is divided using a preset first temperature range and a preset second temperature range to form a temperature distribution of each sintering zone, wherein the preset first temperature range is used to characterize the temperature interval of the combustion zone, the preset second temperature range is adjacent to the preset first temperature range, and the upper limit of the preset second temperature range is less than the lower limit of the preset first temperature range; Determining whether the temperature distribution of each sintering zone includes a first actual temperature zone, where the first actual temperature zone is used to represent a cross-sectional area corresponding to a preset first temperature range; If there is a sintering zone whose temperature distribution does not include the first actual temperature zone, then calculating the maximum temperature on the average line of a second actual temperature zone of the corresponding sintering zone, where the second actual temperature zone represents a cross-sectional area corresponding to a preset second temperature range; if the maximum temperature does not reach the preset threshold temperature, slowing down the vertical sintering speed of the corresponding sintering zone or shortening the sintering time of the corresponding sintering zone; If the temperature distribution of the sintering zone includes a first actual temperature zone, determining whether a second actual temperature zone exists between the first actual temperature zone of the corresponding sintering zone and the base material; if the second actual temperature zone exists between the first actual temperature zone and the base material, accelerating the vertical sintering speed of the corresponding sintering zone or extending the sintering time of the corresponding sintering zone; If there is no second actual temperature zone between the first actual temperature zone of the corresponding sintering zone and the base material, then calculate the average line of the first actual temperature zone of the corresponding sintering zone; determine whether the distance between the average line of the first actual temperature zone and the average line of the ideal first temperature zone is greater than a preset threshold; if the distance between the average line of the first actual temperature zone and the average line of the ideal first temperature zone is greater than the preset threshold, then accelerate the vertical sintering speed of the corresponding sintering zone or extend the sintering time of the corresponding sintering zone; wherein, the ideal first temperature zone is a cross-sectional area corresponding to the preset first temperature range under an ideal production state; According to the division of the sintering area, a distribution port corresponding to the sintering area is added to the auxiliary door distribution device, and the distribution port is used to distribute material to the corresponding sintering area; If there is no first actual temperature zone in the sintering zone and the highest temperature on the average line of the second actual temperature zone does not reach the preset threshold temperature, the material distribution port of the corresponding sintering zone is controlled to increase the thickness of the material layer in the corresponding sintering zone.

2. A sintering endpoint consistency control method according to claim 1, characterized in that: Also includes: If there is a second actual temperature zone between the first actual temperature zone of the sintering zone and the base material, or the distance between the average line of the first actual temperature zone and the average line of the ideal first temperature zone is greater than a preset threshold, the material distribution port of the corresponding sintering zone is controlled to reduce the thickness of the material layer in the corresponding sintering zone.

3. The sintering endpoint consistency control method according to claim 1, characterized in that: The calculation method of the second actual temperature zone average line, the first actual temperature zone average line and the ideal first temperature zone average line includes: Establish a rectangular coordinate system with the width of the tail section as the x-axis and the height of the tail section and the direction from the bottom of the trolley to the material surface as the positive y-axis; Taking the arithmetic average of the highest and lowest y-coordinate values of points with the same x-coordinate in the first actual temperature zone, the second actual temperature zone, or the preset first temperature zone to obtain the center line of the corresponding temperature zone; Take the arithmetic average of the y-coordinate values of each point in the center line to obtain the average line of the corresponding temperature zone.

4. The sintering endpoint consistency control method according to claim 1, characterized in that: The step of obtaining a thermal imaging image of the tail section captured by a thermal imaging camera includes: Continuously collect multiple thermal images of the sintering trolley tail section; Multiple thermal images are superimposed to form a thermal imaging image.

5. A sintering endpoint consistency control system, characterized in that: The system comprises a central control system and a thermal imaging camera installed on the tail platform of the sintering machine, wherein the thermal imaging camera is used to obtain a thermal imaging image of the tail section of the sintering machine during actual sintering production. When executing the sintering endpoint consistency control method according to any one of claims 1 to 4, the central control system is configured as follows: Acquire a thermal imaging image of the tail section captured by a thermal imaging camera; The tail section is divided into multiple sintering zones along the longitudinal direction of the trolley; Based on the thermal imaging image, each sintering zone is divided using a preset first temperature range and a preset second temperature range to form a temperature distribution of each sintering zone, wherein the preset first temperature range is used to characterize the temperature interval of the combustion zone, the preset second temperature range is adjacent to the preset first temperature range, and the upper limit of the preset second temperature range is less than the lower limit of the preset first temperature range; Determining whether the temperature distribution of each sintering zone includes a first actual temperature zone, where the first actual temperature zone is used to represent a cross-sectional area corresponding to a preset first temperature range; If there is a sintering zone whose temperature distribution does not include the first actual temperature zone, then calculating the maximum temperature on the average line of the second actual temperature zone corresponding to the sintering zone, where the second actual temperature zone represents a cross-sectional area corresponding to the preset second temperature range; If the maximum temperature does not reach the preset threshold temperature, slowing down the vertical sintering speed of the corresponding sintering zone or shortening the sintering time of the corresponding sintering zone; If the temperature distribution of the sintering zone includes a first actual temperature zone, determining whether a second actual temperature zone exists between the first actual temperature zone of the corresponding sintering zone and the base material; if the second actual temperature zone exists between the first actual temperature zone and the base material, accelerating the vertical sintering speed of the corresponding sintering zone or extending the sintering time of the corresponding sintering zone; If there is no second actual temperature zone between the first actual temperature zone of the corresponding sintering zone and the base material, then calculate the average line of the first actual temperature zone of the corresponding sintering zone; determine whether the distance between the average line of the first actual temperature zone and the average line of the ideal first temperature zone is greater than a preset threshold; if the distance between the average line of the first actual temperature zone and the average line of the ideal first temperature zone is greater than the preset threshold, then accelerate the vertical sintering speed of the corresponding sintering zone or extend the sintering time of the corresponding sintering zone; wherein, the ideal first temperature zone is a cross-sectional area corresponding to the preset first temperature range under an ideal production state; According to the division of the sintering area, a distribution port corresponding to the sintering area is added to the auxiliary door distribution device, and the distribution port is used to distribute material to the corresponding sintering area; If there is no first actual temperature zone in the sintering zone and the highest temperature on the average line of the second actual temperature zone does not reach the preset threshold temperature, the material distribution port of the corresponding sintering zone is controlled to increase the thickness of the material layer in the corresponding sintering zone.

6. A sintering endpoint consistency control system according to claim 5, characterized in that: It also includes a material distribution port above each sintering zone; the central control system is further configured to: If the highest temperature on the average line of the second actual temperature zone in the sintering zone does not reach the preset threshold temperature, the material distribution port of the corresponding sintering zone is controlled to increase the thickness of the material layer in the corresponding sintering zone; If there is a second actual temperature zone between the first actual temperature zone of the sintering zone and the base material, or the distance between the average line of the first actual temperature zone and the average line of the ideal first temperature zone is greater than a preset threshold, the material distribution port of the corresponding sintering zone is controlled to reduce the thickness of the material layer in the corresponding sintering zone.

Images