Method and system for adjusting transverse sintering uniformity of sintering machine

Abstract

The present application provides a method and system for adjusting the transverse sintering uniformity of a sintering machine, comprising obtaining a tail section image captured by a camera; dividing the tail section image into multiple sintering zones along the height direction of the trolley; determining the actual combustion zone position of each sintering zone; comparing the distance between the actual combustion zone position of each sintering zone and the ideal combustion zone position with a preset threshold value; if the distance is greater than the preset threshold value, accelerating the vertical sintering speed of the corresponding sintering zone or extending the sintering time of the corresponding sintering zone; and terminating the current operation if the distance is less than or equal to the preset threshold value. By shooting a tail section image, processing the real image to divide the multiple sintering zones, determining the actual combustion zone position of each sintering zone, and controlling the actual sintering end point position of each sintering zone to be reasonably stabilized at the preset sintering end point position according to the distance between the actual combustion zone position and the ideal combustion zone position, the transverse sintering uniformity of the sintering machine is adjusted to avoid local under-burning or over-burning.

Description

Technical Field

[0001] The present application relates to the technical field of steel smelting, and in particular to a method and system for adjusting the transverse sintering uniformity of a sintering machine. Background Art

[0002] The sintering materials are discharged from the batching room, mixed and granulated by the mixer and water is added to form a mixed material, which is then stored in the mixed material bin. After the base material trough lays a layer of base material on the sintering trolley, the auxiliary door distribution device piles the mixed material on the base material for ignition and combustion. Figure 1 , the sintering trolley 1 moves in the direction from the sintering machine head wheel 2 to the sintering machine tail wheel 3. In order to ensure the sintering quality and cost, the existing technology usually controls the position of the burn-through point along the trolley's running direction, that is, the sintering end point. The sintering end point position of small and medium-sized sintering machines is generally preset at the position of the second to last bellows 4, and the sintering end point position of large sintering machines is generally preset at the third to last bellows 4.

[0003] As sintering equipment continues to grow in size and the width of the sintering trolley increases, the problem of sintering uniformity in the transverse direction of the sintering machine (i.e. the width direction of the trolley) becomes more prominent. Figure 2 Under ideal production conditions, when the sintering trolley 1 reaches the preset sintering endpoint, the bottom of the combustion zone 10 just touches the bed material 11. This ensures that materials are completely and evenly mixed across the sintering trolley's cross section, with consistent air permeability, consistent material layer thickness, and consistent vertical sintering speed. The combustion zone forms a straight line, maximizing sintering machine operation stability.

[0004] However, due to factors such as material layer thickness, air permeability, and moisture content during sintering, vertical sintering rates are often uneven even within the same material layer cross-section. This makes it difficult to ensure transverse sintering homogeneity, often resulting in localized over- and under-burning, affecting the stability of sintered ore quality. Existing technology typically relies on operator experience, based on the windbox temperature distribution near the burn-through point at the rear of the sintering machine. This manually determines the transverse burn-through uniformity of the trolley material and then adjusts the auxiliary gate distribution device, which is time-consuming, labor-intensive, and inaccurate. Summary of the Invention

[0005] The present application provides a method and system for adjusting the transverse sintering uniformity of a sintering machine, which can be used to solve the technical problem that the existing manual method of judging the transverse sintering uniformity of a sintering machine is time-consuming, labor-intensive, and inaccurate.

[0006] A first aspect of the present application provides a method for adjusting the transverse sintering uniformity of a sintering machine, comprising:

[0007] Obtaining the tail section image captured by the camera;

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

[0009] Determine the actual combustion zone location of each sintering area;

[0010] Detect the distance between the actual combustion zone position and the ideal combustion zone position of each sintering zone respectively to obtain the distance difference of each sintering zone, wherein the ideal combustion zone is the position of the combustion zone in the tail section under the ideal production state;

[0011] Comparing the distance difference of each sintering zone with a preset threshold value in turn;

[0012] If the distance difference 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;

[0013] If the distance difference is less than or equal to the preset threshold, the current operation is terminated.

[0014] In conjunction with the first aspect, in one possible implementation of the first aspect, the method further includes:

[0015] Detecting whether there is a combustion zone in each sintering area in the tail section image;

[0016] If a combustion zone cannot be detected in the existing area, the vertical sintering speed of the corresponding sintering zone is slowed down or the sintering time of the corresponding sintering zone is shortened.

[0017] In conjunction with the first aspect, in one possible implementation of the first aspect, the method further includes:

[0018] 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;

[0019] If there is a burning zone that cannot be detected in the sintering area, the material distribution port of the corresponding sintering area is controlled to increase the thickness of the material layer in the corresponding sintering area;

[0020] In conjunction with the first aspect, in one possible implementation of the first aspect, the method further includes:

[0021] If the distance difference of the sintering zones is greater than a preset threshold, the material distribution opening of the corresponding sintering zone is controlled to reduce the thickness of the material layer in the corresponding sintering zone.

[0022] In conjunction with the first aspect, in one possible implementation of the first aspect, obtaining the tail cross-sectional image captured by the camera includes:

[0023] Continuously collect multiple tail section images;

[0024] Superimposing multiple tail section images to form a secondary processed image;

[0025] Updating the pixel points in the secondary processed image with brightness higher than a set value to be highlighted;

[0026] updating the pixel points in the secondary processed image whose brightness is lower than or equal to the set value to black;

[0027] The tail section image is obtained.

[0028] In combination with the first aspect, in one possible implementation of the first aspect, respectively detecting the distance between the combustion zone position of each sintering zone and the ideal combustion zone position to obtain the distance difference of each sintering zone includes:

[0029] The coordinate values of each point in the highlighted area where the actual combustion zone of each sintering zone is located are taken as the arithmetic average to obtain the center line of the actual combustion zone of each sintering zone;

[0030] Take the arithmetic average of the coordinate values of each point in the highlighted area where the ideal combustion zone is located to obtain the center line of the ideal combustion zone;

[0031] The distance difference of each sintering zone is the absolute value of the difference between the actual combustion zone centerline value and the ideal combustion zone centerline value of the corresponding sintering zone;

[0032] The coordinate value is a distance relative to a reference line, and the reference line is below the ideal combustion zone and parallel to the ideal combustion zone. In combination with the first aspect, in an implementation manner of the first aspect, the method further includes:

[0033] If a burning area appears in the tail section image and the burning area is located in an isolated position, filtering the burning area;

[0034] The isolated position is an area that is higher than 1 / 3 of the material layer thickness relative to the bottom of the trolley.

[0035] A second aspect of the present application provides a system for adjusting the transverse sintering uniformity of a sintering machine, comprising a central control system and a camera installed on a tail platform of the sintering machine, wherein the camera is used to capture a cross-sectional image of the tail of the sintering trolley during actual sintering production. When executing the method for adjusting the transverse sintering uniformity of a sintering machine provided in the first aspect of the present application, the central control system is configured as follows:

[0036] Obtaining the tail section image captured by the camera;

[0037] The tail section image is divided into multiple sintering zones along the height direction of the trolley;

[0038] Determine the actual combustion zone location of each sintering area;

[0039] Detect the distance between the actual combustion zone position and the ideal combustion zone position of each sintering zone respectively to obtain the distance difference of each sintering zone, wherein the ideal combustion zone is the position of the combustion zone in the tail section under the ideal production state;

[0040] Comparing the distance difference of each sintering zone with a preset threshold value in turn;

[0041] If the distance difference 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;

[0042] If the distance difference is less than or equal to the preset threshold, the current operation is terminated.

[0043] In conjunction with the second aspect, in one implementation of the second aspect, the central control system is further configured as follows:

[0044] Detecting whether there is a combustion zone in each sintering area in the tail section image;

[0045] If a combustion zone cannot be detected in the existing area, the vertical sintering speed of the corresponding sintering zone is slowed down or the sintering time of the corresponding sintering zone is shortened.

[0046] 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:

[0047] If there is a burning zone that cannot be detected in the sintering area, the material distribution port of the corresponding sintering area is controlled to increase the thickness of the material layer in the corresponding sintering area;

[0048] If the distance difference of the sintering zones is greater than a preset threshold, the material distribution opening of the corresponding sintering zone is controlled to reduce the thickness of the material layer in the corresponding sintering zone.

[0049] It can be seen from the above technical solution that the present application provides a method and system for adjusting the transverse sintering uniformity of a sintering machine, including obtaining a tail section image captured by a camera; dividing the tail section image into multiple sintering zones along the height direction of the trolley; determining the actual combustion zone position of each sintering zone; respectively detecting the distance between the actual combustion zone position and the ideal combustion zone position of each sintering zone to obtain the distance difference of each sintering zone, wherein the ideal combustion zone is the position of the combustion zone in the tail section under the ideal production state; comparing the distance difference of each sintering zone with a preset threshold in turn; if the distance difference is greater than the preset threshold, accelerating the vertical sintering speed of the corresponding sintering zone or extending the sintering time of the corresponding sintering zone; if the distance difference is less than or equal to the preset threshold, terminating the current operation.

[0050] This application takes a cross-sectional image of the tail of the machine, processes the real image and divides it into multiple sintering zones, determines the actual combustion zone position of each sintering zone, and controls the actual sintering end point position of each sintering zone to be reasonably stabilized at the preset sintering end point position based on the distance between the actual combustion zone position and the ideal combustion zone position, adjusts the transverse sintering uniformity of the sintering machine, and avoids local under-burning or over-burning. BRIEF DESCRIPTION OF THE DRAWINGS

[0051] Figure 1 Schematic diagram of the sintering process provided by the prior art;

[0052] Figure 2 A schematic diagram of a cross-section of a material layer provided by the prior art;

[0053] Figure 3 Schematic diagram of tail section formation and imaging provided in an embodiment of the present application;

[0054] Figure 4 A schematic diagram of a tail section under an ideal production state provided in an embodiment of the present application;

[0055] Figure 5 This is a schematic diagram of the tail section imaging under the ideal production state provided in the embodiment of the present application;

[0056] Figure 6 This is a schematic diagram of tail section imaging under actual production conditions provided in an embodiment of the present application;

[0057] Figure 7 A schematic diagram of image processing provided in an embodiment of the present application;

[0058] Figure 8 This is a structural schematic diagram of a system for adjusting the transverse sintering uniformity of a sintering machine provided in an embodiment of the present application. DETAILED DESCRIPTION

[0059] 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.

[0060] See also Figure 1 The sintering process diagram 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. Due to factors such as the thickness, air permeability, and moisture content of the material layer during sintering production, the vertical sintering speed is often uneven even on the same material layer cross-section, making it impossible to ensure the homogeneity of the horizontal sintering. This often causes local over- and under-burning, affecting the stability of the sintered ore quality. The existing technology usually relies on the operator's experience, based on the windbox temperature distribution near the burn-through point at the rear of the sintering machine, to manually judge the horizontal burn-through uniformity of the trolley material and then adjust the auxiliary door distribution device. This is time-consuming, labor-intensive, and inaccurate.

[0061] In order to solve the technical problems that the existing manual method of judging the transverse sintering uniformity of a sintering machine is time-consuming, labor-intensive and inaccurate, an embodiment of the present application provides a method and system for adjusting the transverse sintering uniformity of a sintering machine. The method for adjusting the transverse sintering uniformity of a sintering machine provided in an embodiment of the present application is described below with reference to the accompanying drawings.

[0062] like Figure 1As shown in the figure, as the sintering trolley 1 moves, the combustion zone 10 gradually moves downward, and the mixture 12 passed by the combustion zone 10 is roasted into sintered ore 13. The speed at which the combustion zone 10 moves downward is called the sintering speed, which is represented by LV and the unit is 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 12, 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.

[0063] After the sintered ore passes through the ignition furnace and begins the sintering process, its sintering time ST (unit: min) is:

[0064] ST = (H-PH) / LV;

[0065] Controlling the sintering end point is an important means of sintering control. During the sintering process, after the mixed material 12 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. The bellows with the highest flue gas temperature is the bellows corresponding to the position of the sintering end point.

[0066] 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:

[0067] S = ST*SV;

[0068]

[0069] 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 uniformity of the sintering machine. The embodiment of the present application adjusts the transverse sintering uniformity of the sintering machine by using the cross-sectional image of the tail of the sintering machine in actual sintering production. The method specifically includes steps S1 to S7.

[0070] S1. Obtain a tail section image captured by a camera.

[0071] See also Figure 3A sintering trolley 1, carrying sintered ore 13, is driven forward by the sintering head and tail wheels 3. 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 sintered ore 13 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. Installing a camera 6 on the tail platform of the sintering machine can capture the tail section image.

[0072] 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 camera 6 is controlled to take a picture of the tail section of the sintering machine.

[0073] See also Figure 4 , is a schematic diagram of the tail section under the ideal production state provided in an embodiment of the present application.

[0074] See also Figure 5 , which is a schematic diagram of tail section imaging under ideal production conditions provided in an embodiment of the present application.

[0075] Under ideal production conditions, the sintering end point is the preset sintering end point position, and the materials on the cross section of the sintering trolley are completely and evenly mixed, the air permeability is the same at all places, the material layer thickness and vertical sintering speed are consistent, and the combustion zone is a straight line segment. Figure 2 As shown in FIG, when the sintering trolley 1 reaches the preset sintering end position, the bottom of the combustion zone 10 just touches the bottom material 11. Since the combustion zone 10 has a certain thickness, when the sintering trolley 1 runs from the preset sintering end position to the material unloading position, there is still a thin layer of the combustion zone 10, as shown in FIG. Figure 4 The figure shows a schematic diagram of the cross section of the tail of the sintering machine under an ideal production state. At this time, the sintered ore is evenly generated, and there is a narrow straight combustion zone near the bottom material 11 area at the tail of the sintering machine.

[0076] The embodiment of the present application theoretically synthesizes a schematic diagram of the tail section under an ideal production state, thereby determining an imaging diagram of the tail section under an ideal production state, and obtaining the position of the combustion zone in the tail section under the ideal production state, that is, the position of the ideal combustion zone, which serves as a reference benchmark for adjusting the transverse sintering uniformity of the sintering machine.

[0077] In some embodiments, the tail section imaging diagram under the ideal production state is determined. In order to generate an image that is more conducive to data processing, the burning area corresponding to the burning zone in the tail section imaging diagram under the theoretical production state is presented as a highlighted area, and the remaining areas are presented as dark areas, such as Figure 5 As shown, the burning zone is a bright band.

[0078] However, in actual sintering production, the combustion zone in the tail section is typically a long, curved strip, and the sintering endpoint locations vary across the sintering machine. To more clearly determine the actual location of the combustion zone, the following details the pre-processing of the tail section image.

[0079] In some embodiments, the tail section image may be a processed image, and the processed tail section image may be obtained by the following steps:

[0080] Step 1: Use a camera to continuously capture multiple tail section images.

[0081] During actual shooting by the camera 6 , multiple consecutive photos may be captured for subsequent secondary processing.

[0082] It should be noted that the tail cross-sectional imaging image refers to the tail cross-sectional photo taken directly by the camera.

[0083] Step 2: Overlay multiple tail section images to form a secondary processed image.

[0084] By superimposing multiple consecutive tail section images, a secondary processed image can be formed by taking the average of the overlapping imaging areas.

[0085] Among them, in actual sintering production, local combustion points may occasionally appear. For example, in a series of sintering cross-section images of the tail section, a local combustion area appears in one image, while the corresponding combustion area does not appear in the other 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 removed.

[0086] In the actual system configuration, an image processor can be built into the camera to perform secondary processing operations on the multiple continuously acquired tail section images. Alternatively, an image processor connected to the camera signal can be configured outside the camera to perform secondary processing operations.

[0087] The secondary processed image obtained by this step filters out noise and can more accurately reflect the actual situation of sintering production.

[0088] Step 3: Update the pixels in the secondary processed image whose brightness is higher than the set value to be highlighted.

[0089] In order to generate an image that is more conducive to data processing, after obtaining the secondary processed image, the image processing system can be used to update the pixel points in the secondary processed image with brightness higher than a set value to be highlighted.

[0090] Step 4: Update the pixels in the secondary processed image whose brightness is lower than or equal to the set value to black.

[0091] In order to generate an image that is more conducive to data processing, after obtaining the secondary processed image, the image processor can be used to update the pixels in the secondary processed image whose brightness is lower than or equal to a set value to black.

[0092] Step 5: Obtain the tail section image.

[0093] The tail section image obtained by the above method avoids excessive noise, better reflects the tail section of actual sintering production, and is more conducive to determining the actual combustion zone position.

[0094] In some embodiments, if a burning area appears in the tail section image and is located in an isolated position, the burning area is filtered, wherein the isolated position is a region that is higher than 1 / 3 of the material layer thickness relative to the bottom of the trolley.

[0095] Specifically, an isolated combustion area appears in the tail section image away from the combustion zone and close to the upper part of the sintering trolley material surface (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.

[0096] like Figure 6 As shown, the embodiment of the present application exemplarily provides a schematic diagram of tail section imaging under actual production conditions. Figure 6 The tail section image in the figure is an image that has undergone secondary processing and brightness update operations. Its highlighted area clearly reflects the position of the actual burning zone in the entire tail section.

[0097] S2. Divide the tail section image into multiple sintering zones along the height direction of the trolley.

[0098] The height direction of the trolley is the longitudinal direction of the trolley. The cross-sectional image of the tail end 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 adjust the uniformity of the transverse sintering of the sintering machine.

[0099] Theoretically, the more sintering areas are divided, the finer the adjustment uniformity 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, so dividing into two areas will appear slightly rough.

[0100] For example, Figure 7 As shown, the width of the large sintering machine trolley is 5500mm, which is evenly divided into 5 sintering areas. The width of each area is 1100mm, which is a relatively comfortable division in engineering.

[0101] 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.

[0102] S3. Determine the actual combustion zone position of each sintering area.

[0103] After dividing the sintering areas, the position of the actual combustion zone in each sintering area is determined based on the tail section image.

[0104] It should be noted that in actual sintering production, overburning also exists, that is, the actual sintering end position is much forward of 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 at the bottom of the sintering trolley. At the material unloading point at the tail of the machine, the material has been roasted and there is no combustion area. At this time, the combustion zone cannot be detected in the cross-sectional image of the tail of the machine.

[0105] Therefore, in some embodiments, each sintering zone in the tail section image is first detected to determine whether a combustion zone exists. If a combustion zone cannot be detected in the existing area, the vertical sintering speed of the corresponding sintering zone is slowed down or the sintering time of the corresponding sintering zone is shortened.

[0106] Exemplarily, the tail section image is divided into five sintering zones along the trolley height direction, including Zone 1, Zone 2, Zone 3, Zone 4 and Zone 5. Among them, no combustion zone is detected in Zone 1 and Zone 2, and combustion zone is detected in Zone 3, Zone 4 and Zone 5. Then, the vertical sintering speed of Zone 1 and Zone 2 is slowed down or the sintering time of Zone 1 and Zone 2 is shortened, and Zone 3, Zone 4 and Zone 5 continue to execute the next step.

[0107] S4. Detect the distance between the actual combustion zone position and the ideal combustion zone position of each sintering zone respectively to obtain the distance difference of each sintering zone, wherein the ideal combustion zone is the position of the combustion zone in the tail section under the ideal production state.

[0108] Since the actual combustion zone is usually a long irregular curve area, in some embodiments, the following method can be used to detect the distance between the actual combustion zone position and the ideal combustion zone position of each sintering zone:

[0109] In the first step, the coordinate values of each point in the highlighted area where the actual combustion zone of each sintering zone is located are taken as the arithmetic average to obtain the center line of the actual combustion zone of each sintering zone.

[0110] The coordinate value is the distance relative to a baseline, which is a line parallel to the ideal burn zone. The distances of each point in the highlighted area of the actual burn zone relative to the baseline are taken as the arithmetic average. This value is used as the distance relative to the baseline to draw a line parallel to the baseline as the centerline of the actual burn zone.

[0111] The reference line is usually set below the ideal combustion zone in the tail section plane, for example Figure 7 As shown, the intersection line of the plane where the tail section is located and the plane where the bottom of the trolley is located is used as the reference line (i.e. Figure 7 0 line in the figure), the arithmetic average of the distances of each point in zone 1 relative to the baseline is taken as b1, the arithmetic average of the distances of each point in zone 2 relative to the baseline is taken as b2, the arithmetic average of the distances of each point in zone 3 relative to the baseline is taken as b3, the arithmetic average of the distances of each point in zone 4 relative to the baseline is taken as b4, the arithmetic average of the distances of each point in zone 5 relative to the baseline is taken as b5, and the above values are used to determine the actual combustion zone center line of each sintering zone.

[0112] In the second step, the coordinate values of each point in the highlighted area where the ideal combustion zone is located are averaged to obtain the center line of the ideal combustion zone.

[0113] For example, Figure 7 As shown, the intersection line of the plane where the tail section is located and the plane where the bottom of the trolley is located is used as the reference line (i.e. Figure 7 The thickness of the bed material can be considered a constant, typically 100 mm. The bed material is sintered ore and will not re-burn. The thickness of the combustion zone as it moves downward is typically 200 to 300 mm. Under ideal production conditions, the combustion zone reaches the bed material layer in the tail section, with a remaining thickness of 100 mm. Since the ideal combustion zone is a straight line segment under ideal production conditions, the ideal combustion zone centerline is a line 150 mm above the baseline. The ideal combustion zone centerline can be set to a = 150 mm.

[0114] In the third step, the distance difference of each sintering zone is the absolute value of the difference between the actual combustion zone centerline value of the corresponding sintering zone and the ideal combustion zone centerline value.

[0115] It should be noted that, in general, the centerline of the actual combustion zone is above the centerline of the ideal combustion zone. Therefore, when the baseline is set below the ideal combustion zone in the tail section plane, the actual combustion zone centerline value is greater than the ideal combustion zone centerline value. At this time, the actual combustion zone centerline value minus the ideal combustion zone centerline value is the distance difference between the two. In very rare cases, if the actual sintering end point is reasonably controlled, the actual combustion zone centerline may also appear below the ideal combustion zone. For example, in the actual tail section, the combustion zone of a sintering area reaches the base material layer and has an average thickness of 50mm. The actual combustion zone centerline is approximately a straight line 125mm above the baseline. At this time, the absolute value of the actual combustion zone centerline value minus the ideal combustion zone centerline value is the distance difference between the two.

[0116] The above method is used to calculate the distance between the actual combustion zone position and the ideal combustion zone position, which can more accurately reflect the gap between the actual combustion zone position and the ideal combustion zone position when the cross-sectional area corresponding to the actual combustion zone is an irregular long strip shape.

[0117] S5. Compare the distance difference of each sintering zone with a preset threshold value in turn.

[0118] After calculating the distance difference of each sintering zone in turn, the distance difference of each sintering zone is compared with a preset threshold.

[0119] Exemplarily, |b1–a| in area 1, |b2–a| in area 2, |b3–a| in area 3, |b4–a| in area 4, and |b5–a| in area 5 are compared with a0 in sequence, where a0 is a preset threshold, such as 100 mm.

[0120] S6. If the distance difference 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.

[0121] S7. If the distance difference is less than or equal to the preset threshold, end the current operation.

[0122] For example, if the distance difference between zone 1 and zone 2 is greater than the preset threshold, and the distance difference between zones 3, 4 and 5 is less than the preset threshold, then after the sintering material surface is ignited to form a combustion zone, until the trolley moves to the tail of the sintering machine, the combustion zones in zones 1 and 2 have not reached the bottom material layer of the sintering trolley. It is necessary to speed up the vertical sintering speed of zones 1 and 2 or extend the sintering time of zones 1 and 2; zones 3, 4 and 5 are fully utilized, production does not need to be adjusted, and the control operation is terminated.

[0123] 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.

[0124] If a combustion zone cannot be detected in the sintering area, the material distribution port of the corresponding sintering area is controlled to increase the thickness of the material layer in the corresponding sintering area.

[0125] If the distance difference of the sintering zones is greater than a preset threshold, the material distribution opening of the corresponding sintering zone is controlled to reduce the thickness of the material layer in the corresponding sintering zone.

[0126] For example, in a certain production scenario, no actual combustion zone was detected in Zone 4, indicating overburning in Sintering Zone 4. The distance between the actual combustion zone position and the ideal combustion zone position in Zones 1, 2, and 5 was greater than a preset threshold, indicating underburning in Sintering Zones 1, 2, and 5, with unburned raw material remaining at the tail of the sintering machine. The distance between the actual combustion zone position and the ideal combustion zone position in Sintering Zone 3 was less than a preset threshold, indicating a reasonable range. Based on these circumstances, the charge distribution opening in Sintering Zone 4 was controlled to increase the charge layer thickness, while the charge distribution openings in Sintering Zones 1, 2, and 5 were controlled to decrease the charge layer thickness.

[0127] 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.

[0128] See also Figure 8 , the embodiment of the present application provides a system for adjusting the transverse sintering uniformity of a sintering machine. Figure 8 As shown, the system implements the aforementioned method for adjusting the transverse sintering uniformity of a sintering machine. This function can be implemented by hardware or by hardware executing corresponding software. The system can include a central control system and a camera mounted on the tail platform of the sintering machine. The camera is used to capture cross-sectional images of the tail of the sintering trolley during actual sintering production.

[0129] The central control system is configured to perform the following operations:

[0130] Get the tail section image captured by the camera.

[0131] The tail section image is divided into multiple sintering zones along the height direction of the trolley.

[0132] Determine the actual combustion zone location of each sintering area.

[0133] The distance between the actual combustion zone position and the ideal combustion zone position of each sintering zone is detected respectively to obtain the distance difference of each sintering zone, wherein the ideal combustion zone is the position of the combustion zone in the tail section under the ideal production state.

[0134] The distance difference of each sintering zone is compared with a preset threshold in turn.

[0135] If the distance difference 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.

[0136] If the distance difference is less than or equal to the preset threshold, the current operation is terminated.

[0137] The central control system is further configured to:

[0138] Detect whether there is a combustion zone in each sintering area in the tail section image.

[0139] If a combustion zone cannot be detected in the existing area, the vertical sintering speed of the corresponding sintering zone is slowed down or the sintering time of the corresponding sintering zone is shortened.

[0140] In one implementation, the system for adjusting the transverse sintering uniformity of the sintering machine further includes a material distribution port above each sintering zone, each material distribution port being connected to a central control system by signal. The central control system is further configured as follows:

[0141] If a combustion zone cannot be detected in the sintering area, the material distribution port of the corresponding sintering area is controlled to increase the thickness of the material layer in the corresponding sintering area.

[0142] If the distance difference of the sintering zones is greater than a preset threshold, the material distribution opening of the corresponding sintering zone is controlled to reduce the thickness of the material layer in the corresponding sintering zone.

[0143] It can be seen from the above technical solution that the embodiment of the present application provides a method and system for adjusting the transverse sintering uniformity of a sintering machine, including obtaining a tail section image captured by a camera; dividing the tail section image into multiple sintering zones along the height direction of the trolley; determining the actual combustion zone position of each sintering zone; respectively detecting the distance between the actual combustion zone position and the ideal combustion zone position of each sintering zone to obtain the distance difference of each sintering zone, wherein the ideal combustion zone is the position of the combustion zone in the tail section under the ideal production state; comparing the distance difference of each sintering zone with a preset threshold in turn; if the distance difference is greater than the preset threshold, accelerating the vertical sintering speed of the corresponding sintering zone or extending the sintering time of the corresponding sintering zone; if the distance difference is less than or equal to the preset threshold, terminating the current operation.

[0144] The embodiment of the present application captures a cross-sectional image of the tail of the machine, processes the real image and divides it into multiple sintering zones, determines the actual combustion zone position of each sintering zone, and controls the actual sintering end point position of each sintering zone to be reasonably stabilized at a preset sintering end point position based on the distance between the actual combustion zone position and the ideal combustion zone position, thereby adjusting the transverse sintering uniformity of the sintering machine and avoiding local under-burning or over-burning.

[0145] 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 method for adjusting the transverse sintering uniformity of a sintering machine, characterized in that: include: Obtain the tail section image captured by the camera, including: Continuously collect multiple tail section images; Superimposing multiple tail section images to form a secondary processed image; Updating the pixel points in the secondary processed image with brightness higher than a set value to be highlighted; updating the pixel points in the secondary processed image whose brightness is lower than or equal to the set value to black; Obtain tail section image; The tail section image is divided into multiple sintering zones along the height direction of the trolley; Determine the actual combustion zone location of each sintering area; Detect the distance between the actual combustion zone position and the ideal combustion zone position of each sintering zone respectively to obtain the distance difference of each sintering zone, wherein the ideal combustion zone is the position of the combustion zone in the tail section under the ideal production state; Comparing the distance difference of each sintering zone with a preset threshold value in turn; If the distance difference 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; If the distance difference is less than or equal to the preset threshold, the current operation is terminated.

2. The method for adjusting the transverse sintering uniformity of a sintering machine according to claim 1, characterized in that: Also includes: Detecting whether there is a combustion zone in each sintering area in the tail section image; If a combustion zone cannot be detected in the existing area, the vertical sintering speed of the corresponding sintering zone is slowed down or the sintering time of the corresponding sintering zone is shortened.

3. The method for adjusting the transverse sintering uniformity of a sintering machine according to claim 2, characterized in that: Also includes: 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 a combustion zone cannot be detected in the sintering area, the material distribution port of the corresponding sintering area is controlled to increase the thickness of the material layer in the corresponding sintering area.

4. The method for adjusting the transverse sintering uniformity of a sintering machine according to claim 3, characterized in that: Also includes: If the distance difference of the sintering zones is greater than a preset threshold, the material distribution opening of the corresponding sintering zone is controlled to reduce the thickness of the material layer in the corresponding sintering zone.

5. The method for adjusting the transverse sintering uniformity of a sintering machine according to claim 1, characterized in that: The detecting the distance between the combustion zone position of each sintering zone and the ideal combustion zone position to obtain the distance difference of each sintering zone includes: The coordinate values of each point in the highlighted area where the actual combustion zone of each sintering zone is located are taken as the arithmetic average to obtain the center line of the actual combustion zone of each sintering zone; Take the arithmetic average of the coordinate values of each point in the highlighted area where the ideal combustion zone is located to obtain the center line of the ideal combustion zone; The distance difference of each sintering zone is the absolute value of the difference between the actual combustion zone centerline value and the ideal combustion zone centerline value of the corresponding sintering zone; The coordinate value is the distance relative to a reference line, and the reference line is a straight line below and parallel to the ideal combustion zone.

6. The method for adjusting the transverse sintering uniformity of a sintering machine according to claim 1, characterized in that: Also includes: If a burning area appears in the tail section image and the burning area is located in an isolated position, filtering the burning area; The isolated position is an area that is higher than 1 / 3 of the material layer thickness relative to the bottom of the trolley.

7. A system for adjusting the transverse sintering uniformity of a sintering machine, characterized in that: The system comprises a central control system and a camera installed on the tail platform of a sintering machine, wherein the camera is used to collect cross-sectional images of the tail of a sintering trolley during actual sintering production. When executing the method for adjusting the transverse sintering uniformity of a sintering machine according to any one of claims 1 to 6, the central control system is configured as follows: Obtaining the tail section image captured by the camera; The tail section image is divided into multiple sintering zones along the height direction of the trolley; Determine the actual combustion zone location of each sintering area; Detect the distance between the actual combustion zone position and the ideal combustion zone position of each sintering zone respectively to obtain the distance difference of each sintering zone, wherein the ideal combustion zone is the position of the combustion zone in the tail section under the ideal production state; Comparing the distance difference of each sintering zone with a preset threshold value in turn; If the distance difference 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; If the distance difference is less than or equal to the preset threshold, the current operation is terminated.

8. The system for adjusting the transverse sintering uniformity of a sintering machine according to claim 7, characterized in that: The central control system is further configured to: Detecting whether there is a combustion zone in each sintering area in the tail section image; If a combustion zone cannot be detected in the existing area, the vertical sintering speed of the corresponding sintering zone is slowed down or the sintering time of the corresponding sintering zone is shortened.

9. The system for adjusting the transverse sintering uniformity of a sintering machine according to claim 8, characterized in that: It also includes a material distribution port above each sintering zone; the central control system is further configured to: If there is a burning zone that cannot be detected in the sintering area, the material distribution port of the corresponding sintering area is controlled to increase the thickness of the material layer in the corresponding sintering area; If the distance difference of the sintering zones is greater than a preset threshold, the material distribution opening of the corresponding sintering zone is controlled to reduce the thickness of the material layer in the corresponding sintering zone.

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