Method and system for adjusting sintering finish line in partition mode according to cooling speed in fuel gas injection

Abstract

The invention discloses a method and system for adjusting a sintering finish line in a partition mode according to the cooling speed during fuel gas injection, and the method comprises the steps that an actual sintering section thermal image of a current sintering pallet is obtained, and the actual sintering section thermal image and a real section image of the current sintering pallet have a known correlation proportion; the current combustion temperature value of each target observation temperature area on the current sintering section observation line is obtained; the current cooling distance between the horizontal calculation sintering end point corresponding to the target observation temperature zone and the sintering machine tail marking line is obtained through calculation; and if the trolley sintering material corresponding to the target observation temperature zone i is in an effective sintering state, maintaining the current injection quantity of the target observation temperature zone i to enter another sintering production. According to the method for adjusting the sintering finish line according to the cooling speed in the partition mode through fuel gas injection, when the trolley sintering material corresponding to the target observation temperature zone i is in the effective sintering state, the current injection amount of the target observation temperature zone i is maintained to enter another sintering production, and the sintering work is guided.

Description

Technical Field

[0001] The present invention relates to the technical field of sintering, and in particular to a method for adjusting a sintering end line by gas injection according to cooling speed zoning and a system for adjusting a sintering end line by gas injection according to cooling speed zoning. Background Art

[0002] With the rapid development of modern industry, the scale of steel production is getting larger and larger, and energy consumption is also increasing. Energy conservation and environmental protection indicators are becoming more and more important factors to consider in the steel production process. In steel production, iron-containing raw ore needs to be processed by the sintering system before entering the blast furnace for smelting. That is, various powdered iron-containing raw materials are mixed with appropriate amounts of fuel (coal powder, coke powder) and flux, and appropriate amounts of water. After mixing and balling, they are placed on the sintering trolley for roasting, so that a series of physical and chemical changes occur, forming sintered ore that is easy to smelt. This process is called sintering.

[0003] In the prior art, the techniques for regulating the sintering end point can be divided into three categories: one is to control the sintering end point by controlling the sintering trolley speed; the second is to control the sintering end point by controlling the sintering main exhaust fan system (negative pressure, air volume); the third is to control the sintering end point by controlling the thickness of the sintering material layer. The existing method of regulating the sintering end point can only make the combustion zone as close to the bottom material as possible at the target sintering end point position, and does not take into account the technical problem that due to the characteristics of the material layer and the trolley, the materials in different horizontal areas of the sintering trolley are inconsistent before and after the actual sintering (some horizontal areas complete sintering at the sintering end point line, some horizontal areas have completed sintering before the sintering end point line, and some horizontal areas have not completed sintering before the sintering end point line), resulting in low sintering efficiency.

[0004] In view of this, it is necessary to propose a method and system for adjusting the sintering end line by gas injection according to the cooling rate partition to alleviate the above defects. Summary of the invention

[0005] The present invention provides a method and system for adjusting the sintering end line by gas injection according to the cooling speed, which solves the technical problems of inconsistency before and after the sintering end and low sintering efficiency of materials in different horizontal areas in the existing sintering trolley during actual sintering.

[0006] To achieve the above purpose, the technical solution adopted by the present invention is as follows:

[0007] A method for adjusting a sintering end line by gas injection according to a cooling speed partition, S10, obtaining an actual sintering cross-section thermal image of a current sintering trolley, the actual sintering cross-section thermal image having a thermal imaging base material layer and a horizontally arranged thermal imaging proposed observation line, the thermal imaging proposed observation line being above the thermal imaging base material layer and having a thermal imaging vertical preset distance from the base material layer, the actual sintering cross-section thermal image having a known correlation ratio with a real cross-section image of the current sintering trolley, the thermal imaging base material layer corresponding to the real base material layer of the real cross-section image, the thermal imaging proposed observation line corresponding to the current sintering cross-section observation line of the real cross-section image, the real base material layer having a vertical preset distance from the thermal imaging and the current sintering cross-section observation line The corresponding sintering reference distance; S20, the actual sintering cross-section thermal imaging is evenly divided into i target observation temperature zones along the vehicle width direction, i is a positive integer greater than 1, and the injection sintering cross-section is evenly divided into i sintering zones along the horizontal direction, each target observation temperature zone i corresponds to a gas injection pipe Gi, the gas injection pipe Gi is arranged in the gas injection zone, and multiple gas injection pipes Gi are evenly arranged along the vehicle width direction. Each gas injection pipe Gi is provided with a gas regulating valve Fi for regulating the flow rate; the current combustion temperature value Ti of each target observation temperature zone i on the current sintering cross-section observation line is obtained, and multiple target observation temperature zones i are evenly arranged along the extension direction of the current sintering cross-section observation line; S30, the formula is used Calculate and obtain the sintering cooling horizontal distance corresponding to each target observation temperature zone i, wherein Tm is the critical sintering material temperature when the sintering state is completed, CRi is the actual cooling rate corresponding to each target observation temperature zone i, Sv is the moving speed of the sintering trolley, and Li is the sintering cooling horizontal distance; S40, if the current actual distance corresponding to the target observation temperature zone i is within the range of the first threshold value, it is determined that the sintering material of the trolley corresponding to the target observation temperature zone i is in an effective sintering state; if the sintering material of the trolley corresponding to the target observation temperature zone i is in an effective sintering state, maintain the current injection amount of the target observation temperature zone i to enter another sintering production.

[0008] Furthermore, if the current actual distance corresponding to the target observation temperature zone i is greater than the first threshold value, it is determined that the sintering material of the trolley corresponding to the target observation temperature zone i is in an over-mature sintering state; if the sintering material of the trolley corresponding to the target observation temperature zone i is in an over-mature sintering state, the current blowing amount of the target observation temperature zone i is reduced according to the first estimated reduction amount and enter another sintering production until the sintering material of the trolley corresponding to the target observation temperature zone i is in an effective sintering state.

[0009] Furthermore, it is determined whether the target observation temperature zone i belongs to the edge sintering zone or the middle sintering zone, wherein the target observation temperature zone i in the middle area of ​​the actual sintering section thermal imaging is the middle sintering zone, and the edge sintering zones are on both sides of the middle sintering zone; if the target observation temperature zone i is the middle sintering zone, then the current blowing amount of the target observation temperature zone i is weakened according to the first estimated reduction amount and enters another sintering production until the sintering material on the trolley corresponding to the target observation temperature zone i is in an effective sintering state; if the target observation temperature zone i is the edge sintering zone, then the current blowing amount of the target observation temperature zone i is weakened according to 0.8 to 0.9 times the first estimated reduction amount and enters another sintering production until the sintering material on the trolley corresponding to the target observation temperature zone i is in an effective sintering state.

[0010] Furthermore, if the current actual distance corresponding to the target observation temperature zone i is less than the first threshold value, it is determined that the sintering material of the trolley corresponding to the target observation temperature zone i is in an over-raw sintering state; if the sintering material of the trolley corresponding to the target observation temperature zone i is in an over-raw sintering state, the current blowing amount of the target observation temperature zone i is increased according to the first estimated increase amount to enter another sintering production until the sintering material of the trolley corresponding to the target observation temperature zone i is in an effective sintering state.

[0011] Further, it is determined whether the target observation temperature zone i belongs to the edge sintering zone or the middle sintering zone, wherein the target observation temperature zone i in the middle area of ​​the actual sintering section thermal imaging is the middle sintering zone, and the edge sintering zone is on both sides of the middle sintering zone; if the target observation temperature zone i is the middle sintering zone, then the current blowing amount of the target observation temperature zone i is weakened according to the first estimated increase and enters another sintering production until the sintering material on the trolley corresponding to the target observation temperature zone i is in an effective sintering state; if the target observation temperature zone i is the edge sintering zone, then the current blowing amount of the target observation temperature zone i is increased according to 1.0 to 1.2 times the first estimated increase and enters another sintering production until the sintering material on the trolley corresponding to the target observation temperature zone i is in an effective sintering state.

[0012] Furthermore, the horizontal estimated sintering end line Zi corresponding to each target observation temperature zone i is determined according to the sintering cooling horizontal distance Li, and all the horizontal estimated sintering end lines Zi are linearly fitted to obtain the horizontal estimated sintering end line.

[0013] Furthermore, the method also includes the step of: the vertical distance between the actual sintering cross-section line and the actual base material layer is no more than 30 mm.

[0014] Furthermore, the current temperature interval value of the current sintering cross-section observation line is obtained, and if the current temperature interval value of the current sintering cross-section observation line is less than a preset ignition temperature threshold, a prompt message is issued.

[0015] Furthermore, multiple frames of historical sintering cross-section thermal images are obtained; the historical sintering cross-section thermal images in which each target observation temperature zone i has a historical critical sintering material layer and a historical sintering cooling material layer are determined to be historical reference sintering cross-section thermal images; the adjacent area temperature difference of the historical sintering cooling material layer of adjacent target observation temperature zone i in each historical reference sintering cross-section thermal image is obtained; and the historical reference sintering cross-section thermal images in which the adjacent area temperature difference is within a preset temperature difference range are determined to be historical effective sintering cross-section thermal images.

[0016] The present invention also provides a system for adjusting the sintering finish line by gas injection according to the cooling speed partition, comprising a sintering machine, a sintering trolley, a thermal imaging acquisition device and a processing device, wherein the sintering trolley is movably arranged along the sintering machine head wheel toward the sintering machine tail wheel; the thermal imaging acquisition device is arranged on the outer side of the sintering machine tail wheel of the sintering machine, the thermal imaging acquisition device is used to obtain the actual sintering cross-sectional thermal image of the current sintering trolley, the thermal imaging acquisition device is used to obtain the historical effective sintering cross-sectional thermal image, the actual sintering cross-sectional thermal image has a known correlation ratio with the real cross-sectional image of the current sintering trolley; the processing device is used to execute the steps of the above-mentioned method for adjusting the sintering finish line by gas injection according to the cooling speed partition.

[0017] The present invention has the following beneficial effects:

[0018] The method for adjusting the sintering end line by gas injection according to the cooling speed zone provided by the present invention is based on the research on sintering technology. Since the sintering material temperature of the combustion zone when the trolley material completes sintering is basically determined, and the trolley material is completely sintered when it burns to the base material position; by obtaining the actual sintering cross-sectional thermal imaging of the current sintering trolley, the actual sintering cross-sectional thermal imaging has a thermal imaging base material layer and a horizontally arranged thermal imaging proposed observation line, the actual sintering cross-sectional thermal imaging has a known correlation ratio with the real cross-sectional image of the current sintering trolley, the thermal imaging base material layer corresponds to the real base material layer of the real cross-sectional image, and the thermal imaging proposed observation line corresponds to the real sintering cross-sectional line of the real cross-sectional image; by obtaining the current sintering cooling temperature value of each target observation temperature zone i on the current sintering cross-sectional observation line (real sintering cross-sectional line), finally, according to the sintering material temperature, the actual cooling speed corresponding to each target observation temperature zone i and the moving speed of the sintering trolley, each target observation temperature zone i is mapped out. The sintering cooling horizontal distance of the target observation temperature zone i and the current cooling distance between each target observation temperature zone i and the tail mark line of the sintering machine are obtained. Based on the current cooling distance, the sintering end point of each target observation temperature zone i can be determined, which avoids the existing technical problem that the temperature sensor can only be arranged in the sintering bellows, and the temperature of the bellows flue gas is monitored by the temperature sensor to predict the sintering end point; at the same time, the actual cooling rate corresponding to the target observation temperature zone i in the historical data is obtained by calculating through the thermal imaging of the historical effective sintering section, and finally the current cooling distance corresponding to the target observation temperature zone i is obtained in real time according to the actual cooling rate; finally, according to the current cooling distance corresponding to each target observation temperature zone i, the sintering state of the trolley sintering material corresponding to each target observation temperature zone i is determined. When the trolley sintering material corresponding to the target observation temperature zone i is in an effective sintering state, the current injection amount of the target observation temperature zone i is maintained to enter another sintering production, so as to guide the sintering work.

[0019] In addition to the above-described purposes, features and advantages, the present invention has other purposes, features and advantages. The present invention will be further described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0021] Figure 1 It is the process flow chart of the existing sintering system;

[0022] Figure 2 This is a schematic diagram of the existing sinter formation, where: Figure 2 a is the existing sinter formation process diagram, Figure 2 b is the existing sinter formation cross-section diagram, Figure 2c is the completed cross-section of the existing sintered ore;

[0023] Figure 3 It is a schematic diagram of thermal imaging of an actual sintering section of the method of adjusting the sintering end line according to the cooling rate by gas injection according to the present invention;

[0024] Figure 4 It is a schematic diagram of thermal imaging of a historical effective sintering section of the method of adjusting the sintering end line by gas injection according to the cooling rate partition of the present invention;

[0025] Figure 5 It is a schematic diagram of a flow chart of a method for adjusting a sintering end point line by gas injection according to cooling speed zones of the present invention;

[0026] Figure 6 is a schematic diagram of a real cross-sectional image of a method for obtaining a sintering finish line by partitioning in another embodiment of the present invention;

[0027] Figure 7 It is a schematic diagram of a real cross-sectional image of a method for obtaining a sintering finish line by partitioning in yet another embodiment of the present invention. DETAILED DESCRIPTION

[0028] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0029] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0032] The sintering system mainly includes sintering trolley, mixer, main exhaust fan, ring cooler and other equipment. Figure 1 As shown in the figure: various raw materials are proportioned in the batching room to form a mixture. After the mixture enters the mixer for mixing and balling, it is evenly spread on the sintering trolley through the round roller feeder and the nine-roller distributor to form a sintering mixture layer. The ignition fan and the ignition fan start the ignition furnace, and the sintering mixture on the top layer of the sintering trolley is ignited in the ignition furnace. The ignited combustion zone begins to move from top to bottom, and the mixture passing through the combustion zone is roasted into sintered ore. This is the sintering process. The sintered ore obtained after sintering is crushed by a single roller crusher and then cooled in an annular cooler. Finally, it is sent to the blast furnace or the finished ore bin after screening and granulation. Among them, the oxygen required for the sintering process is provided by the main exhaust fan. There are multiple vertically arranged bellows under the sintering trolley. Under the bellows is a horizontally placed large flue (or flue). The large flue is connected to the main exhaust fan. The negative pressure wind generated by the main exhaust fan through the large flue and the bellows passes through the trolley to provide combustion-supporting air for the sintering process.

[0033] Please refer to Figure 2 ( Figure 2 a. Figure 2 b and Figure 2 c) During the sintering process, the ignited combustion zone moves from top to bottom, and the moving speed of the combustion zone is the vertical sintering speed; the sintering trolley moves from the head to the tail (the tail of the sintering machine), and the moving speed of the sintering trolley is the sintering machine speed; when the combustion zone moves to the bottom of the sintering trolley mixture, the corresponding position of the sintering trolley relative to the head (or tail) of the sintering machine is the sintering end point. Figure 2 As shown in a, with the movement of the sintering trolley, the combustion zone gradually moves downward, and the mixed material passing through the combustion zone is roasted into sintered ore; Figure 2 As shown in b, during the sintering process, the materials in the sintering trolley can be divided into a bottom material layer, a mixed material layer, a combustion zone layer, and a sintered ore layer from bottom to top. Figure 2 As shown in c, when the combustion zone moves to the bed material layer, the materials in the sintering trolley have all been roasted into sintered ore. At this time, the corresponding position is the sintering end position, which is generally represented by the bellows number. Optionally, the combustion zone layer has a certain thickness, and the sintering end position can be understood as the bottom of the combustion zone just touching the bed material layer. When the sintering end position is controlled at the second to last bellows or the first to last bellows, no raw material will be produced, the fuel utilization rate is high, and the sintering efficiency is high.

[0034] Please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4Through the study of sintering technology, it is found that the sintering ore formation process is the process of the sintering combustion zone gradually moving downward. The combustion temperature of the sintering combustion zone is 1250℃ (sintering material temperature). The sintering mixture is mixed with various components such as fuel, flux, iron ore, etc. After the sintering material surface is ignited at the ignition furnace at the head of the sintering machine, a combustion zone with a thickness of about 20 to 30mm is formed. Various mixtures in the combustion zone are formed after high-temperature roasting to form sintered ore. After the combustion zone gradually moves downward to the bottom of the sintering trolley to lay the bottom material layer, the combustion zone will no longer move downward, and the fuel in the area passed by the combustion zone has been burned. In the process of the combustion zone gradually moving downward, the sintering machine trolley also moves toward the direction of the sintering machine tail mark line. When the sintering machine trolley moves to the appropriate area at the tail of the sintering machine (the reasonable position of the sintering end point is the position of the penultimate bellows or the penultimate bellows), the combustion zone reaches the bottom material layer. At this time, the sintering area utilization rate is the largest, which is most beneficial to production; the main exhaust fan provides air for the combustion of the combustion zone, and the air passes through the trolley sintering ore layer, the combustion zone, the mixed material layer, and the bottom material layer, and is discharged through the bellows and the large flue; obviously, the combustion zone heats the air passing through the combustion zone, and the heated air passes through the mixed material layer under the combustion zone and is cooled by the mixed material layer. As the combustion zone gradually moves downward, the flue gas temperature of each bellows will gradually rise. When the combustion zone reaches the bottom material layer, the flue gas temperature of the sintering bellows at the corresponding position reaches the highest; the bottom material layer is the end position of the combustion zone. After the combustion is completed, no heat is provided to the bellows flue gas, and the bellows flue gas temperature will gradually decrease thereafter.

[0035] When gas injection is used for zoned blowing sintering, the part above the completely sintered material layer (the material layer corresponding to the sintering material temperature or the material layer corresponding to the critical sintering material temperature) in the sintering cross-section thermal imaging is the sintering cooling material layer (cooling clinker layer), the material layer directly between the completely sintered material layer and the bottom material layer is the raw material layer, and the cooled sintering material layer above has undergone a sintering process before the trolley reaches the tail of the machine. At this time, the actual cooling rate corresponding to the target observation temperature zone i can be calculated based on the height difference between the completely sintered material layer and the sintering cooling material layer in the mapped real cross-sectional image and the known vertical combustion rate. Specifically, if the temperature of the fully sintered material layer (combustion zone) in the real cross-sectional image is 1250°C, a sintered cooling ore (cooled clinker layer) is formed in the area above the combustion zone, and the temperature of the sintered cooling ore 20 mm above the fully sintered material is 1050°C; the point at 1050°C is cooled from 1250°C, and the vertical combustion speed of the area is 20 mm / min, so the point at 1050°C was 1250°C one minute ago, that is, it was cooled by 200°C in 1 minute.

[0036] Optionally, when the combustion zone reaches the bed material layer, all the mixed materials on the trolley are roasted to form sintered ore. When the combustion zone reaches the bed material layer, the coordinates of the corresponding points on the sintering machine axis are the coordinates of the sintering end point. Looking at the sintering machine from a bird's eye view, sintering is a surface. For example, a sintering machine cabin is 90 meters long and 5.5 meters wide. The sintering machine is a surface of 5500mm X 90000mm. Connecting all the points of the combustion zone on this surface that reach the bed material layer into a line is the isotherm of 1250℃ on the bed material layer. This line is the horizontally estimated sintering end line in the actual sintering production process. The sintering end point is to regard the sintering machine as a straight line. The sintering end point is a point on the straight line of the sintering machine. The position of the sintering end point is located at the tail of the straight line of the sintering machine. For example, a sintering machine has 23 bellows, each bellows is 4 meters wide, and the total length is 92 meters. The reasonable position of the sintering end point is the position of the penultimate bellows or the penultimate bellows. The existing method of directly detecting the sintering end point by detecting the temperature inflection point of the sintering bellows flue gas has a resolution of 4 meters, and the end point with higher precision can only be obtained indirectly through function fitting and other methods. It can be seen that the acquisition of the horizontal calculation of the sintering end line is of great significance for mastering the sintering production process and guiding sintering production. The existing sintering end point is essentially a concept of approximate simplification of the horizontal calculation of the sintering end line from the perspective of feasible technology, and the sintering end point is only roughly obtained through the temperature inflection point of the bellows flue gas.

[0037] Understandably, the existing technology does not consider solving the technical problem of inconsistency before and after sintering and low sintering efficiency of materials in different transverse areas of the sintering trolley during actual sintering based on thermal imaging guidance of actual sintering cross-section.

[0038] Please refer to Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7The present invention provides a method for adjusting the sintering end line by gas injection according to the cooling speed partition, comprising the following steps: S10, obtaining the actual sintering cross-section thermal imaging of the current sintering trolley, the actual sintering cross-section thermal imaging having a thermal imaging base material layer and a horizontally arranged thermal imaging proposed observation line, the thermal imaging proposed observation line is above the thermal imaging base material layer and has a thermal imaging vertical preset distance with the base material layer, the actual sintering cross-section thermal imaging has a known correlation ratio with the real cross-section image of the current sintering trolley, the thermal imaging base material layer corresponds to the real base material layer of the real cross-section image, the thermal imaging proposed observation line corresponds to the current sintering cross-section observation line of the real cross-section image, the real base material layer and the current sintering cross-section observation line have a known correlation ratio with the thermal imaging base material layer. The sintering reference distance corresponding to the vertical preset distance is obtained; S20, the actual sintering cross-section thermal imaging is evenly divided into i target observation temperature zones along the vehicle width direction, i is a positive integer greater than 1, and the injection sintering cross-section is evenly divided into i sintering zones along the horizontal direction, each target observation temperature zone i corresponds to a gas injection pipe Gi, the gas injection pipe Gi is arranged in the gas injection zone, and multiple gas injection pipes Gi are evenly arranged along the vehicle width direction, and each gas injection pipe Gi is provided with a gas regulating valve Fi for regulating the flow rate; the current combustion temperature value Ti of each target observation temperature zone i on the current sintering cross-section observation line is obtained, and multiple target observation temperature zones i are evenly arranged along the extension direction of the current sintering cross-section observation line; S30, the formula is used Calculate and obtain the sintering cooling horizontal distance corresponding to each target observation temperature zone i, wherein Tm is the critical sintering material temperature when the sintering state is completed, CRi is the actual cooling rate corresponding to each target observation temperature zone i, Sv is the moving speed of the sintering trolley, and Li is the sintering cooling horizontal distance; S40, if the current actual distance corresponding to the target observation temperature zone i is within the range of the first threshold value, it is determined that the sintering material of the trolley corresponding to the target observation temperature zone i is in an effective sintering state; if the sintering material of the trolley corresponding to the target observation temperature zone i is in an effective sintering state, maintain the current injection amount of the target observation temperature zone i to enter another sintering production.

[0039] The method for adjusting the sintering end line by gas injection according to the cooling speed zone provided by the present invention is based on the research on sintering technology. Since the sintering material temperature of the combustion zone when the trolley material completes sintering is basically determined, and the trolley material is completely sintered when it burns to the base material position; by obtaining the actual sintering cross-sectional thermal imaging of the current sintering trolley, the actual sintering cross-sectional thermal imaging has a thermal imaging base material layer and a horizontally arranged thermal imaging proposed observation line, the actual sintering cross-sectional thermal imaging has a known correlation ratio with the real cross-sectional image of the current sintering trolley, the thermal imaging base material layer corresponds to the real base material layer of the real cross-sectional image, and the thermal imaging proposed observation line corresponds to the real sintering cross-sectional line of the real cross-sectional image; by obtaining the current sintering cooling temperature value of each target observation temperature zone i on the current sintering cross-sectional observation line (real sintering cross-sectional line), finally, according to the sintering material temperature, the actual cooling speed corresponding to each target observation temperature zone i and the moving speed of the sintering trolley, each target observation temperature zone i is mapped out. The sintering cooling horizontal distance of the target observation temperature zone i and the current cooling distance between each target observation temperature zone i and the tail mark line of the sintering machine are obtained. Based on the current cooling distance, the sintering end point of each target observation temperature zone i can be determined, which avoids the existing technical problem that the temperature sensor can only be arranged in the sintering bellows, and the temperature of the bellows flue gas is monitored by the temperature sensor to predict the sintering end point; at the same time, the actual cooling rate corresponding to the target observation temperature zone i in the historical data is obtained by calculating through the thermal imaging of the historical effective sintering section, and finally the current cooling distance corresponding to the target observation temperature zone i is obtained in real time according to the actual cooling rate; finally, according to the current cooling distance corresponding to each target observation temperature zone i, the sintering state of the trolley sintering material corresponding to each target observation temperature zone i is determined. When the trolley sintering material corresponding to the target observation temperature zone i is in an effective sintering state, the current injection amount of the target observation temperature zone i is maintained to enter another sintering production, so as to guide the sintering work.

[0040] It can be understood that the sintering material temperature Tm when the sintering state is completed is 1230°C to 1270°C, and the actual cooling rate of each target observation temperature zone i is calculated and obtained based on the historical effective sintering section thermal imaging. Optionally, the tail mark line of the sintering machine is arranged close to the tail wheel of the sintering machine and is parallel to the axis of the tail wheel of the sintering machine (that is, parallel to the sintering section of the trolley). In the present invention, the horizontal estimated sintering end point corresponding to each target observation temperature zone i is mapped based on the target observation temperature zone i on the actual sintering section thermal imaging, and finally the horizontal estimated sintering end line can be obtained (that is, the isotherm of the sintering material temperature is estimated); wherein, the horizontal estimated sintering end point corresponding to the target observation temperature zone i can be determined by the current cooling distance Li between the horizontal estimated sintering end point Zi corresponding to the target observation temperature zone i and the tail mark line of the sintering machine. When guiding sintering, if the current cooling distance Li is too large, it means that the horizontally estimated sintering end point Zi is too advanced, and the distance of the horizontally estimated sintering end point Zi relative to the target sintering end point bellows is advanced. At this time, the heat utilization rate is low, and the sintering speed can be accelerated to make the sintering close to the target sintering end point bellows; if the current cooling distance Li is too small, it means that the horizontally estimated sintering end point Zi is too delayed, and the distance of the horizontally estimated sintering end point Zi relative to the target sintering end point bellows is relatively delayed. At this time, raw materials may easily appear, and the sintering speed can be slowed down to speed up the sintering speed to get close to the target sintering end point bellows, and the horizontally estimated sintering end point Zi can be adjusted by gas blowing.

[0041] Please refer to Figure 6 Furthermore, in order to accurately obtain the actual cooling rate of each target observation temperature zone i, the actual sintering cross-section thermal imaging has a thermal imaging comparison current sintering cross-section observation line parallel to the proposed thermal imaging observation line, the thermal imaging comparison current sintering cross-section observation line is above the proposed thermal imaging observation line, the thermal imaging comparison current sintering cross-section observation line corresponds to the temperature difference comparison observation line of the real cross-section image, and the temperature difference comparison observation line and the current sintering cross-section observation line have a vertical height difference; obtain the current comparison temperature value of each target observation temperature zone i on the temperature difference comparison observation line; obtain the single-zone cooling temperature difference of the same target observation temperature zone i according to the difference between the current sintering ore temperature value Ti and the current comparison temperature value of each target observation temperature zone i; obtain the vertical height difference between the temperature difference comparison observation line and the current sintering cross-section observation line; obtain the single-zone cooling time according to the vertical height difference and the vertical vertical combustion speed; obtain the actual cooling rate CRi corresponding to each target observation temperature zone i according to the single-zone cooling time and the single-zone cooling temperature difference. Specifically, single-zone cooling time = vertical height difference / vertical combustion speed; the vertical combustion speed can be determined based on experience, and can also be determined based on the total combustion mileage and the total combustion time.

[0042] Please refer to Figure 7Furthermore, in order to accurately obtain the actual cooling rate of each target observation temperature zone i, the actual sintering cross-section thermal imaging has a thermal imaging isothermal observation line, which is above the proposed thermal imaging observation line, and the thermal imaging isothermal observation line corresponds to the isothermal combustion line of the real cross-section image; the isothermal combustion line of each target observation temperature zone i is fitted to obtain a combustion isothermal horizontal line, and the combustion isothermal horizontal line of each target observation temperature zone i is arranged in parallel with the current sintering cross-section observation line; the current comparative temperature value of the combustion isothermal horizontal line of each target observation temperature zone i is obtained; the interval cooling temperature difference of the same target observation temperature zone i is obtained according to the difference between the current sintering ore temperature value Ti and the current comparative temperature value of each target observation temperature zone i; the vertical height difference between the temperature difference comparison observation line of each target observation temperature zone i and the current sintering cross-section observation line is obtained; the interval cooling time is obtained according to the vertical height difference and the vertical combustion speed; the actual cooling rate CRi corresponding to each target observation temperature zone i is obtained according to the interval cooling time and the interval cooling temperature difference. Specifically, interval cooling time = vertical height difference / vertical burning speed; the vertical burning speed can be determined based on experience, and can also be determined based on the total burning mileage and the total burning time.

[0043] Please refer to Figure 3 and Figure 4 , further, using the formula Calculate and obtain the actual cooling rate corresponding to each target observation temperature zone i; T'm is the material temperature corresponding to the historical critical sintering material layer in the historical effective sintering section thermal imaging, T'i is the material temperature of the historical sintering cooling material layer corresponding to the target observation temperature zone i in the historical effective sintering section thermal imaging, Agv is the vertical combustion velocity, the material temperature range corresponding to the historical critical sintering material layer is [1230℃, 1270℃], and the material temperature range of the historical sintering cooling material layer is [600℃, 1200℃]. The actual cooling rate of each target observation temperature zone i is calculated and obtained based on the historical effective sintering section thermal imaging.

[0044] It can be understood that the more target observation temperature zones are set, the more horizontal estimated sintering end lines are obtained, which is conducive to improving the accuracy of obtaining the horizontal estimated sintering end line. Optionally, the number of target observation temperature zones is not less than 3. In the present invention, the number of target observation temperature zones can be 3, 5, or 10, 20, etc. More preferably, all target observation temperature zones on the current sintering cross-section observation line are obtained, and after obtaining the sintering cooling horizontal distances corresponding to all target observation temperature zones, the horizontal estimated sintering end line is obtained by fitting.

[0045] In specific implementation, each target observation temperature zone i corresponds to a gas blowing pipe, and the gas blowing pipe is arranged in the gas blowing area. Multiple gas blowing pipes are evenly spaced along the vehicle width direction, and each gas blowing pipe is provided with a gas regulating valve for regulating the flow rate. Each target observation temperature zone corresponds to at least one sintering reference observation line i. If the horizontally estimated sintering end line Zi is too early, the gas injection amount of the corresponding gas blowing pipe is reduced. If the horizontally estimated sintering end line Zi is too delayed, the gas injection amount of the corresponding gas blowing pipe is increased.

[0046] Further, if the current actual distance corresponding to the target observation temperature zone i is greater than the first threshold value, it is determined that the sintering material of the trolley corresponding to the target observation temperature zone i is in an overcooked sintering state; if the sintering material of the trolley corresponding to the target observation temperature zone i is in an overcooked sintering state, the current injection amount of the target observation temperature zone i is weakened according to the first estimated reduction amount and enters another sintering production until the sintering material of the trolley corresponding to the target observation temperature zone i is in an effective sintering state. It can be understood that in the present invention, when the sintering material of the trolley corresponding to the target observation temperature zone i is in an overcooked sintering state, the reduction amount weakens the current injection amount of the target observation temperature zone i, which is conducive to delaying the sintering end point of the target observation temperature zone i, and finally makes the current actual distance corresponding to the target observation temperature zone i within the range of the first threshold value. It can be understood that the first threshold is set according to the actual situation. If the theoretical sintering end line (sintering machine tail mark line) is at the position of the penultimate bellows, the first threshold is 7.5 to 8.5 meters.

[0047] Preferably, it is determined whether the target observation temperature zone i belongs to the edge sintering zone or the middle sintering zone, wherein the target observation temperature zone i in the middle area of ​​the actual sintering cross-section thermal imaging is the middle sintering zone, and the edge sintering zone is on both sides of the middle sintering zone; if the target observation temperature zone i is the middle sintering zone, (the middle response gas injection amount is relatively obvious), then the current injection amount of the target observation temperature zone i is weakened according to the first estimated reduction amount and enters another sintering production, until the trolley sintering material corresponding to the target observation temperature zone i is in an effective sintering state; if the target observation temperature zone i is the edge sintering zone, (the middle response gas injection amount is relatively obvious), then the current injection amount of the target observation temperature zone i is weakened according to 0.8 to 0.9 times the first estimated reduction amount and enters another sintering production, until the trolley sintering material corresponding to the target observation temperature zone i is in an effective sintering state. It can be understood that the first estimated reduction amount can be obtained by reducing the current injection amount by 5% to 15%, or it can be obtained based on experience or historical data, or it can be set to a fixed reduction value.

[0048] In the present invention, through the study of gas injection assisted sintering, after gas injection is carried out in different zones, the sintering material in the middle of the sintering car responds to the change in gas injection more obviously. Therefore, if the target observation temperature zone i is the middle sintering zone, the current injection amount of the target observation temperature zone i is weakened according to the first estimated reduction amount and enters another sintering production; if the target observation temperature zone i is the edge sintering zone, the current injection amount of the target observation temperature zone i is weakened according to 0.8 to 0.9 times the first estimated reduction amount and enters another sintering production, which is conducive to precise adjustment and rapid entry into an effective sintering state.

[0049] It can be understood that when the target observation temperature zones are not more than five, if the target observation temperature zones are 3, then the one target observation temperature zone in the middle piece is the middle sintering zone; if the target observation temperature zones are 4, then the two target observation temperature zones in the middle piece are the middle sintering zone; if the target observation temperature zones are 5, then the three target observation temperature zones in the middle piece are the middle sintering zone. If the target observation temperature zones are 6 to 10, then the two target observation temperature zones on the sides are the edge sintering zones. If the target observation temperature zones are 10 to 18, then the three target observation temperature zones on the sides are the edge sintering zones. If the target observation temperature zones are greater than 18, then the six target observation temperature zones on the sides are the edge sintering zones.

[0050] Furthermore, if the current actual distance corresponding to the target observation temperature zone i is less than the first threshold, it is determined that the trolley sintering material corresponding to the target observation temperature zone i is in an over-sintering state; if the trolley sintering material corresponding to the target observation temperature zone i is in an over-sintering state, the current injection amount of the target observation temperature zone i is increased according to the first estimated increase to enter another sintering production until the trolley sintering material corresponding to the target observation temperature zone i is in an effective sintering state. It can be understood that the first estimated increase can be obtained by reducing the current injection amount by 5% to 15%, or it can be obtained based on experience or historical data, or it can be set as a fixed increase value.

[0051] Since the raw material needs to be returned to the ore after screening, the processing workload is large. Usually, the sintered raw material is first adjusted to sintered clinker and then accurately adjusted to the sintering end line. In the present invention, the first estimated increase is greater than the first estimated decrease.

[0052] More preferably, it is determined whether the target observation temperature zone i belongs to the edge sintering zone or the middle sintering zone, wherein the target observation temperature zone i in the middle area of ​​the actual sintering cross-section thermal imaging is the middle sintering zone, and the edge sintering zones are on both sides of the middle sintering zone; if the target observation temperature zone i is the middle sintering zone (the middle response gas blowing amount is more obvious), then the current blowing amount of the target observation temperature zone i is weakened according to the first estimated increase and enters another sintering production until the sintering material of the trolley corresponding to the target observation temperature zone i is in an effective sintering state; if the target observation temperature zone i is the edge sintering zone (the middle response gas blowing amount is more obvious), then the current blowing amount of the target observation temperature zone i is increased according to 1.0 to 1.2 times the first estimated increase and enters another sintering production until the sintering material of the trolley corresponding to the target observation temperature zone i is in an effective sintering state.

[0053] Furthermore, in order to obtain the horizontal estimated sintering end line to guide sintering, the horizontal estimated sintering end point corresponding to each target observation temperature zone i is determined according to the current cooling distance Li, and all the horizontal estimated sintering end points are linearly fitted to obtain the horizontal estimated sintering end line.

[0054] It can be understood that in the present invention, according to actual conditions, the temperature range of the terminal sintering line temperature is [1230°C, 1270°C], the temperature range of the historical sintering line temperature is [600°C, 1200°C], and the complete sintering layer cooling is when the ore is sintered and cooled to 600°C-1200°C, and the cooling rate is relatively stable.

[0055] It can be understood that the present invention fully considers the characteristics of the sintering process, considers the different characteristics of the sintering material in the middle area and the sintering material on both sides during the sintering process of the sintering trolley, and obtains the current actual sintering distance between the horizontally estimated sintering end point Zi of the corresponding target observation temperature zone i and the tail mark line of the sintering machine based on the actual cooling rate corresponding to each target observation temperature zone i.

[0056] Furthermore, in order to accurately determine the sintering endpoint, a plurality of target observation temperature zones i are evenly arranged along the extension direction of the current sintering cross-section observation line.

[0057] It can be understood that the thickness of the combustion zone is 20 to 30 mm. In order to accurately determine the sintering end point, the vertical distance between the actual sintering cross-section line and the actual base material layer should not be greater than 30 mm.

[0058] It can be understood that the material at the current sintering section observation line position adjacent to the base material layer and above the base material layer may be raw material (the temperature of raw material is generally low, and the material temperature is generally below 600°C), or it may be burned clinker that has just been sintered (completely sintered material layer, the material temperature is between 1230°C and 1270°C), or it may be cooled clinker after sintering (sintered cooling material layer, the material temperature is generally between 600°C and 1230°C).

[0059] Further, the current temperature interval value of the current sintering cross-section observation line is obtained, and if the current temperature interval value of the current sintering cross-section observation line is less than the preset ignition temperature threshold, a prompt message is issued. Optionally, the preset ignition temperature threshold can be pre-set, and in order to avoid ignition failure or other reasons that cause raw materials to be difficult to detect, the preset ignition temperature threshold is 600°C.

[0060] It is understandable that a sensor is installed at the tail mark position of the sintering machine to track the inclination angle A of the trolley. When the inclination angle A of the trolley is reached, the thermal imaging camera takes a picture of the tail section of the sintering machine to obtain the actual sintering section thermal image. The actual sintering section thermal image has a known correlation ratio with the real cross-sectional image of the current sintering trolley. It is understandable that as the sintering trolley moves, the combustion zone gradually moves downward, and the mixture passed by the combustion zone is roasted into sintered ore; when the current sintering trolley moves to the tail of the sintering machine (the target sintering end position), the combustion zone has reached the bottom material layer of the sintering machine trolley; during the sintering production process, air passes through the mixture layer to provide air for the combustion zone, and the air also cools the sintered ore area above the combustion zone that has been formed.

[0061] It can be understood that in the present invention, the position of the base material layer in the actual sintering cross-section thermal imaging can be determined by the ratio of the actual space occupied by the base material to the actual space of the sintering trolley of the target batch.

[0062] Further, multiple frames of historical sintering cross-section thermal images are obtained; the historical sintering cross-section thermal images of each target observation temperature zone i having a historical critical sintering material layer and a historical sintering cooling material layer are determined as historical reference sintering cross-section thermal images; the adjacent temperature difference of the historical sintering cooling material layer of the adjacent target observation temperature zone i in each historical reference sintering cross-section thermal image is obtained; the historical reference sintering cross-section thermal images with adjacent temperature differences within the preset temperature difference range are determined as historical effective sintering cross-section thermal images. It can be understood that in the present invention, by obtaining appropriate images from multiple frames of historical sintering cross-section thermal images as historical effective sintering cross-section thermal images, the actual cooling rate corresponding to each target observation temperature zone i is finally obtained. It can be understood that the preset temperature difference range can be 5 to 50°C; it can also be 5 to 100°C; it can also be 5 to 150°C.

[0063] Furthermore, in order to improve the accuracy of obtaining the actual cooling rate, the preset temperature difference range is 5 to 50°C.

[0064] The present invention also provides a system for adjusting the sintering finish line by gas injection according to the cooling speed partition, comprising a sintering machine, a sintering trolley, a thermal imaging acquisition device and a processing device, wherein the sintering trolley is movably arranged along the sintering machine head wheel toward the sintering machine tail wheel; the thermal imaging acquisition device is arranged on the outer side of the sintering machine tail wheel of the sintering machine, the thermal imaging acquisition device is used to obtain the actual sintering cross-sectional thermal image of the current sintering trolley, the thermal imaging acquisition device is used to obtain the historical effective sintering cross-sectional thermal image, the actual sintering cross-sectional thermal image has a known correlation ratio with the real cross-sectional image of the current sintering trolley; the processing device is used to execute the steps of the method for adjusting the sintering finish line by gas injection according to the cooling speed partition as described above.

[0065] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A method for adjusting the sintering end point line by gas injection according to the cooling rate, characterized in that: The steps include: S10, obtaining the actual sintering cross-section thermal image of the current sintering trolley, wherein the actual sintering cross-section thermal image has a thermal imaging base material layer and a horizontally arranged thermal imaging proposed observation line, wherein the thermal imaging proposed observation line is located above the thermal imaging base material layer and has a thermal imaging vertical preset distance with the thermal imaging base material layer, wherein the actual sintering cross-section thermal image has a known correlation ratio with the real cross-section image of the current sintering trolley, wherein the thermal imaging base material layer corresponds to the real base material layer of the real cross-section image, wherein the thermal imaging proposed observation line corresponds to the current sintering cross-section observation line of the real cross-section image, and wherein the real base material layer and the current sintering cross-section observation line have a sintering reference distance corresponding to the thermal imaging vertical preset distance; S20, the actual sintering cross-section thermal imaging is evenly divided into i target observation temperature zones along the vehicle width direction, i is a positive integer greater than 1, and the injection sintering cross-section is evenly divided into i sintering zones along the transverse direction, each of the target observation temperature zones i corresponds to a gas injection pipe Gi, and the gas injection pipe Gi is arranged in the gas injection zone, and multiple gas injection pipes Gi are evenly spaced along the vehicle width direction, and each of the gas injection pipes Gi is provided with a gas regulating valve Fi for regulating the flow rate; Acquire a current combustion temperature value Ti of each target observation temperature zone i on the current sintering cross-section observation line, wherein the plurality of target observation temperature zones i are evenly arranged along the extension direction of the current sintering cross-section observation line; S30, using the formula Calculate and obtain the sintering cooling horizontal distance corresponding to each target observation temperature zone i, wherein Tm is the critical sintering material temperature when the sintering state is completed, CRi is the actual cooling rate corresponding to each target observation temperature zone i, Sv is the moving speed of the sintering trolley, and Li is the sintering cooling horizontal distance; S40, if the current actual distance corresponding to the target observation temperature zone i is within the range of the first threshold, determining that the sintering material on the trolley corresponding to the target observation temperature zone i is in an effective sintering state; If the sintering material in the trolley corresponding to the target observation temperature zone i is in an effective sintering state, the current injection amount of the target observation temperature zone i is maintained to enter another sintering production.

2. The method for adjusting the sintering end point line by gas injection according to cooling rate according to claim 1 is characterized in that: If the current actual distance corresponding to the target observation temperature zone i is greater than the first threshold, it is determined that the sintered material on the trolley corresponding to the target observation temperature zone i is in an overcooked sintering state; If the sintering material on the trolley corresponding to the target observation temperature zone i is in an over-mature sintering state, the current injection amount of the target observation temperature zone i is reduced according to the first estimated reduction amount and another sintering production is entered until the sintering material on the trolley corresponding to the target observation temperature zone i is in an effective sintering state.

3. The method for adjusting the sintering end point line by gas injection according to cooling rate according to claim 2 is characterized in that: Determine whether the target observation temperature zone i belongs to the edge sintering zone or the middle sintering zone, wherein the target observation temperature zone i in the middle area of ​​the actual sintering cross-section thermal imaging is the middle sintering zone, and the edge sintering zones are located on both sides of the middle sintering zone; If the target observation temperature zone i is the middle sintering zone, the current injection amount of the target observation temperature zone i is reduced according to the first estimated reduction amount and another sintering production is entered until the sintering material on the trolley corresponding to the target observation temperature zone i is in an effective sintering state; If the target observation temperature zone i is the edge sintering zone, the current blowing amount of the target observation temperature zone i is weakened according to 0.8 to 0.9 times the first estimated reduction amount and enters another sintering production until the sintering material on the trolley corresponding to the target observation temperature zone i is in an effective sintering state.

4. The method for adjusting the sintering end point line by gas injection according to cooling rate zones according to claim 1 is characterized in that: If the current actual distance corresponding to the target observation temperature zone i is less than the first threshold, it is determined that the sintered material on the trolley corresponding to the target observation temperature zone i is in an over-sintered state; If the sintering material on the trolley corresponding to the target observation temperature zone i is in an over-sintered state, the current injection amount of the target observation temperature zone i is increased according to the first estimated increase to enter another sintering production until the sintering material on the trolley corresponding to the target observation temperature zone i is in an effective sintering state.

5. The method for adjusting the sintering end point line by gas injection according to cooling rate according to claim 4, characterized in that: Determine whether the target observation temperature zone i belongs to the edge sintering zone or the middle sintering zone, wherein the target observation temperature zone i in the middle area of ​​the actual sintering cross-section thermal imaging is the middle sintering zone, and the edge sintering zones are located on both sides of the middle sintering zone; If the target observation temperature zone i is the middle sintering zone, the current injection amount of the target observation temperature zone i is reduced according to the first estimated increase amount and another sintering production is entered until the sintering material on the trolley corresponding to the target observation temperature zone i is in an effective sintering state; If the target observation temperature zone i is the edge sintering zone, the current blowing amount of the target observation temperature zone i is increased according to 1.0 to 1.2 times the first estimated increase and enters another sintering production until the sintering material on the trolley corresponding to the target observation temperature zone i is in an effective sintering state.

6. The method for adjusting the sintering end point line by gas injection according to cooling rate zones according to any one of claims 1 to 5, characterized in that: According to the sintering cooling horizontal distance Li, the horizontal estimated sintering end line Zi corresponding to each target observation temperature zone i is determined, All the horizontal estimated sintering end lines Zi are linearly fitted to obtain the horizontal estimated sintering end lines.

7. The method for adjusting the sintering end point line by gas injection according to cooling rate zones according to any one of claims 1 to 5, characterized in that: Also includes the steps: The vertical distance between the actual sintering cross-section line and the actual base material layer is no more than 30 mm.

8. The method for adjusting the sintering end point line by gas injection according to cooling rate zones according to any one of claims 1 to 5, characterized in that: The current temperature interval value of the current sintering cross-section observation line is obtained, and if the current temperature interval value of the current sintering cross-section observation line is less than a preset ignition temperature threshold, a prompt message is issued.

9. The method for adjusting the sintering end point line by gas injection according to cooling rate zones according to any one of claims 1 to 5, characterized in that: Obtain multiple frames of historical sintering cross-section thermal images; Determine that the historical sintering cross-section thermal image having the historical critical sintering material layer and the historical sintering cooling material layer in each of the target observation temperature zones i is a historical reference sintering cross-section thermal image; Obtaining the adjacent area temperature difference of the historical sintering cooling material layer adjacent to the target observation temperature zone i in each of the historical reference sintering cross-section thermal images; The historical reference sintering cross-section thermal image with an adjacent zone temperature difference within a preset temperature difference range is determined as the historical effective sintering cross-section thermal image.

10. A system for adjusting the sintering end line by gas injection according to the cooling rate, characterized in that: It comprises a sintering machine, a sintering trolley, a thermal imaging acquisition device and a processing device, wherein the sintering trolley is movably arranged along the head wheel of the sintering machine toward the tail wheel of the sintering machine; The thermal imaging acquisition device is arranged on the outer side of the sintering machine tail wheel of the sintering machine, and is used to acquire the actual sintering cross-section thermal image of the current sintering trolley, and is used to acquire the historical effective sintering cross-section thermal image, and the actual sintering cross-section thermal image has a known correlation ratio with the real cross-section image of the current sintering trolley; The processing device is used to execute the steps of the method for adjusting the sintering finish line by gas injection according to the cooling rate zone as described in any one of claims 1 to 9.

Images