Control method, device and equipment of heating furnace and medium

Abstract

The invention discloses a control method, device, equipment and medium for a heating furnace, and the method comprises the steps: obtaining the surface temperature and the core temperature of a plate blank in the heating furnace, comparing the difference value between the surface temperature and the core temperature of the plate blank with a set value, and determining the temperature of the plate blank according to the comparison result. And redistributing the heating loads of the first heating section, the second heating section and the soaking section in the heating furnace. By changing the heating mode of the plate blank in the furnace, the surface quality defects of the plate blank can be effectively reduced, the overall quality of the hot-rolled plate blank is improved, and the problem of slight warping of the silicon steel plate blank in the heating furnace can be prevented.

Description

Technical Field

[0001] This invention relates to the field of hot rolling control technology, and in particular to a control method, device, equipment and medium for a heating furnace. Background Technology

[0002] Silicon steel slabs are an important steel material, mainly used in the production of cores for various motors, generators, compressors, and transformers, and have wide applications in the power and home appliance industries. However, during the hot rolling process of silicon steel slabs, micro-warping defects often occur. These defects can be inherited and manifest in subsequent processes (normalizing), seriously affecting product quality. Silicon steel slabs are relatively soft at high temperatures, making them prone to pitting at the contact points with the walking beam. This also causes iron oxide scale or ferrous silicate scale to be pressed into the slab, resulting in the infiltration of iron scale into the subsurface structure.

[0003] Currently, traditional slab heating and transfer processes in hot-rolled furnaces are inadequate for silicon steel production and cannot effectively address this type of quality defect. To improve the quality of hot-rolled slabs, researchers have conducted extensive work, such as optimizing descaling processes and adjusting slab spacing to control iron oxide scale formation. However, these methods still cannot completely solve the problem of micro-surface defects in silicon steel slabs within the furnace. Therefore, there is an urgent need to develop a new technical solution to address the micro-surface defect problem in silicon steel slab heating furnaces. Summary of the Invention

[0004] This application provides a control method, device, equipment, and medium for a heating furnace. By changing the heating method of the slab in the furnace, it can effectively reduce surface quality defects of the slab, improve the overall quality of the hot-rolled slab, and prevent the problem of micro-warping in the heating furnace of silicon steel slab.

[0005] In a first aspect, the present invention provides the following technical solution through an embodiment of the present invention: A method for controlling a heating furnace includes: acquiring the difference between the surface temperature and the core temperature of a slab in the heating furnace; comparing the difference with a set value; and redistributing the heating load of a first heating section, a second heating section, and a soaking section in the heating furnace according to the comparison result.

[0006] Preferably, the total heating load of the first heating section, the second heating section, and the heat spreader is 100%, wherein the total heating load of the first heating section and the second heating section is 40-60%, and the heating load of the heat spreader is 60-40%.

[0007] Preferably, the set value includes a first set value. The step of obtaining the difference between the surface temperature and core temperature of the slab in the heating furnace, comparing the difference with the set value, and redistributing the heating load of the first heating section, the second heating section, and the soaking section in the heating furnace according to the comparison result includes: obtaining a first difference between the surface temperature and core temperature of the slab within a preset time after the slab enters the first heating section; comparing the first difference with the first set value; if the first difference is greater than the first set value, increasing the total heating load of the first heating section and the second heating section; if the first difference is less than the first set value, decreasing the total heating load of the first heating section and the second heating section.

[0008] Preferably, the set value further includes a second set value. The step of obtaining the difference between the surface temperature and core temperature of the slab in the heating furnace, comparing the difference with the set value, and redistributing the heating load of the first heating section, the second heating section, and the soaking section in the heating furnace based on the comparison result further includes: obtaining a second difference between the surface temperature and core temperature of the slab within a preset time after the slab enters the second heating section; comparing the second difference with a second set value; if the second difference is greater than the second set value, increasing the total heating load of the first heating section and the second heating section; if the second difference is less than the second set value, decreasing the total heating load of the first heating section and the second heating section.

[0009] Preferably, the set value further includes a third set value. The step of obtaining the difference between the surface temperature and core temperature of the slab in the heating furnace, comparing the difference with the set value, and redistributing the heating load of the first heating section, the second heating section, and the soaking section in the heating furnace based on the comparison result further includes: obtaining a third difference between the surface temperature and core temperature of the slab within a preset time after the slab enters the soaking section; comparing the third difference with the third set value; if the third difference is greater than the third set value, reducing the heating load of the soaking section in the heating furnace; if the third difference is less than the third set value, increasing the heating load of the soaking section in the heating furnace.

[0010] Preferably, the first setting value is between 50 and 200°C, the second setting value is between 30 and 150°C, and the third setting value is between 20 and 50°C.

[0011] Preferably, the heating furnace is provided with a walking beam, and the method further includes: during the process of the walking beam carrying the slab in a positive cycle, monitoring whether the walking beam is in the upper front position; if it is in the upper front position, controlling the walking beam to stay in the current position for a preset time.

[0012] Secondly, through an embodiment of the present invention, the present invention provides the following technical solution: A control device for a heating furnace, comprising: The acquisition module is used to acquire the difference between the surface temperature and the core temperature of the slab in the heating furnace; The load distribution module is used to compare the difference with the set value, and redistribute the heating load of the first heating section, the second heating section and the soaking section in the heating furnace according to the comparison result.

[0013] Thirdly, through one embodiment of the present invention, the following technical solution is provided: An electronic device includes: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the method described in any of the first aspects above.

[0014] Fourthly, through one embodiment of the present invention, the following technical solution is provided: A computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method described in any of the first aspects above.

[0015] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: The furnace control method provided in this invention first acquires the temperature difference between the surface and core of the slab within the furnace. This temperature difference is then compared to a set value. Based on the comparison result, the heating loads of the first heating section, the second heating section, and the soaking section within the furnace are redistributed to ensure the temperature difference equals the set value. By collecting and comparing the temperature difference between the slab's surface and core with the set value, and using this comparison as a basis for adjusting the heating loads of the heating and soaking sections, the heating method of the slab under different temperature differences can be flexibly adjusted. This effectively reduces surface quality defects in the slab, improves the overall quality of the hot-rolled slab, and prevents micro-warping issues in the silicon steel slab heating furnace. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a flowchart of the control method for the heating furnace in an embodiment of the present invention; Figure 2 This is a schematic diagram illustrating the transfer method of the slab within the heating furnace in an embodiment of the present invention; Figure 3 This is a schematic diagram of the control device for the heating furnace in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of an electronic device in an embodiment of the present invention. Detailed Implementation

[0018] This application provides a control method, device, equipment, and medium for a heating furnace. By changing the heating method of the slab in the furnace, it can effectively reduce surface quality defects of the slab, improve the overall quality of the hot-rolled slab, and prevent the problem of micro-warping in the heating furnace of silicon steel slab.

[0019] The technical solution of this application embodiment is to solve the above-mentioned technical problems, and the general idea is as follows: A method for controlling a heating furnace includes: acquiring the surface temperature and core temperature of a slab in the heating furnace; comparing the difference between the surface temperature and core temperature of the slab with a set value; and redistributing the heating load of a first heating section, a second heating section, and a soaking section in the heating furnace based on the comparison result.

[0020] To better understand the above technical solutions, the following will provide a detailed explanation of the technical solutions in conjunction with the accompanying drawings and specific implementation methods.

[0021] Firstly, the present invention provides a method for controlling a heating furnace, specifically, as follows: Figure 1 As shown, the method includes the following steps S101 to S102: Step S101: Obtain the difference between the surface temperature and the core temperature of the slab in the heating furnace.

[0022] Step S102: Compare the difference with the set value, and based on the comparison result, redistribute the heating load of the first heating section, the second heating section and the soaking section in the heating furnace to control the difference to be equal to the set value.

[0023] It should be noted that the heating furnace includes a first heating section, a second heating section, and a soaking section. The steel billet enters the first heating section (preheating zone) from the tail of the furnace, then enters the second heating section (heating zone), and finally enters the soaking section (uniform temperature zone), before being conveyed to the rolling mill to ensure uniform steel properties after rolling. This heating furnace control method can be widely applied to silicon steel and similar steel surface micro-defect improvement.

[0024] Among them, heating load refers to the total heat that the heating system of the first heating section, the second heating section, or the soaking section needs to transfer to the furnace or the workpiece per unit time.

[0025] In a specific embodiment, before obtaining the difference between the surface temperature and the core temperature of the slab in the heating furnace, the method further includes: obtaining the surface temperature and the core temperature of the slab in the heating furnace. In one embodiment, obtaining the surface temperature and the core temperature of the slab in the heating furnace may include: detecting the edge temperature and the center temperature of the slab as the surface temperature and the core temperature of the slab.

[0026] For example, based on the principle of infrared radiation thermometry, the temperature signal of the slab surface (edge ​​and center) can be directly captured to obtain the edge temperature and center temperature of the slab. For example, the infrared radiation thermometry device can be a thermocouple, a photon detector, or an infrared focal plane array detector, etc.

[0027] In other embodiments, obtaining the surface temperature and core temperature of the slab in the heating furnace may include: detecting the edge temperature and center temperature of the slab; obtaining the core temperature through a heat transfer model (such as a finite element model) based on the center temperature and parameters such as slab thickness, heating time, and thermal conductivity; and obtaining the surface temperature and core temperature of the slab based on the edge temperature and core temperature.

[0028] This allows for the monitoring of the temperature difference between the surface and core of the slab by utilizing the heat conduction mechanism of the slab. In actual control, the load distribution between the heating and soaking sections can be adjusted by monitoring the transverse temperature changes of the slab's finishing entry temperature (FET) and finishing exit temperature (FDT) during the rolling process.

[0029] The total heating load of the first heating section, the second heating section, and the soaking section is 100%. Before obtaining the difference between the surface temperature and the core temperature of the slab in the heating furnace, the total heating load of the first and second heating sections can be pre-controlled to 60%, and the heating load of the soaking section to 40%. For example, controlling the total heating load of the first and second heating sections to 60% can be achieved by setting the heating load of the first heating section to 30% and the heating load of the second heating section to 30%.

[0030] It should be noted that the set value here is greater than or equal to 20℃ and less than or equal to 200℃. By using differential heating technology, the surface temperature of the slab is made more than 20℃ higher than the core temperature, which promotes the shedding and creeping of the iron scale in the pit, enhances the overall heating uniformity of the slab, and improves the quality of the hot-rolled slab.

[0031] In a specific embodiment, the set value includes a first set value. The difference between the surface temperature and core temperature of the slab in the heating furnace is obtained. The difference is compared with the set value. Based on the comparison result, the heating load of the first heating section, the second heating section, and the soaking section in the heating furnace is redistributed. This may include: obtaining a first difference between the surface temperature and core temperature of the slab within a preset time after the slab enters the first heating section; comparing the first difference with the first set value; if the first difference is greater than the first set value, increasing the total heating load of the first heating section and the second heating section; if the first difference is less than the first set value, decreasing the total heating load of the first heating section and the second heating section.

[0032] Specifically, the set value also includes a second set value. This involves acquiring the difference between the surface temperature and core temperature of the slab within the heating furnace, comparing the difference with the set value, and redistributing the heating load of the first heating section, the second heating section, and the soaking section within the heating furnace based on the comparison result. It may also include: acquiring a second difference between the surface temperature and core temperature of the slab within a preset time after it enters the second heating section; comparing the second difference with the second set value; if the second difference is greater than the second set value, increasing the total heating load of the first heating section and the second heating section; if the second difference is less than the second set value, decreasing the total heating load of the first heating section and the second heating section.

[0033] Specifically, the set value also includes a third set value, which involves obtaining the difference between the surface temperature and core temperature of the slab in the heating furnace, comparing the difference with the set value, and redistributing the heating load of the first heating section, the second heating section, and the soaking section in the heating furnace based on the comparison result. It may also include: obtaining a third difference between the surface temperature and core temperature of the slab within a preset time after it enters the soaking section; comparing the third difference with the third set value; if the third difference is greater than the third set value, reducing the heating load of the soaking section in the heating furnace; if the third difference is less than the third set value, increasing the heating load of the soaking section in the heating furnace.

[0034] The preset duration can be 0 to 10 seconds. The preset duration after entering the first heating section refers to the preset duration calculated from the moment the slab enters the first heating section. For example, if the slab begins to enter the first heating section, the preset duration is 0 seconds. The preset duration after entering the second heating section and the preset duration after entering the soaking section have the same meaning and will not be elaborated further here.

[0035] Specifically, to ensure a certain temperature difference between the surface temperature and the core temperature of the slab, the heating load of the first heating section, the second heating section, and the soaking section in the heating furnace is redistributed based on a comparison between the difference and a set value. The total heating load of the first and second heating sections is controlled to be 40-60%, and the heating load of the soaking section is controlled to be 60-40%. This ensures that the total heating load of the first and second heating sections, as well as the heating load of the soaking section, are always adjusted within these limits.

[0036] It should be noted that, in the traditional method of load distribution for heating furnaces, the first and second heating sections account for 80% of the total load, while the soaking section accounts for 20%. This technology adopts a different method: the first and second heating sections use lower heating temperatures, accounting for 60% of the total load, while the soaking section uses a higher heating temperature, accounting for 40% of the load. This results in a temperature difference of 20-50℃ between the slab and the temperature of the slab passing through the soaking section.

[0037] Optionally, the first setting value can be between 50 and 200°C, the second setting value can be between 30 and 150°C, and the third setting value can be between 20 and 50°C. For example, the first setting value can be 60°C, 80°C, or 120°C, the second setting value can be 40°C, 60°C, or 100°C, and the third setting value can be 30°C or 40°C.

[0038] Of course, in actual production control, the settings of the first, second, and third setpoints can also be adjusted adaptively according to the specifications of the slab.

[0039] In one embodiment, increasing the total heating load of the first heating section and the second heating section may include: increasing the total heating load of the first heating section and the second heating section once every preset time interval, so that the heating temperature of both the first heating section and the second heating section increases by 10°C, until a first difference is detected to be equal to a first set value.

[0040] Similarly, reducing the heating load of the soaking zone in the heating furnace can include: reducing the heating load of the soaking zone once every preset time interval, so that the heating temperature of the soaking zone decreases by 10°C, until a third difference is detected to be equal to a third set value.

[0041] Optionally, the preset duration can be 5 to 10 seconds.

[0042] For example, as shown in Table 1 below, in order to meet the requirement of a temperature difference of 20-50℃ at the outlet of the heat soaking end of the slab, the first heating section and the second heating section are controlled at a lower heating temperature (the temperature of the first heating section is between 1100-1140℃ and the temperature of the second heating section is between 1120-1180℃), with a total load distribution of 50%. The heat soaking section is controlled at a higher heating temperature (1160-1200℃), with a load distribution of 50%, thereby achieving the target temperature difference of 25℃ for the slab.

[0043] Table 1

[0044] The range in Table 1 represents the allowable fluctuation range of the set values ​​for each heating section. In actual production, the temperature difference of the slab needs to be controlled within this range to ensure heating stability and cope with certain production fluctuations. The target value in the set values ​​in Table 1 is the value under ideal conditions. When the temperature difference of the slab is not equal to the first set value, the temperature difference of the slab can be adjusted to approach the target value.

[0045] For example, if the first temperature difference is obtained when the slab enters the first heating section, and the first temperature difference is greater than 200°C, it indicates that the temperature difference between the surface temperature and the core temperature of the slab is large. In this case, it is necessary to increase the total heating load of the first heating section and the second heating section, for example, by increasing the total heating load from 40% to 50%. Obtain the second temperature difference when the slab enters the second heating section. If the second temperature difference is greater than 150°C, it indicates that the temperature difference between the surface temperature and the core temperature of the slab is large. In this case, it is necessary to increase the total heating load of the first heating section and the second heating section. For example, increase the total heating load from 50% to 55%. Obtain the third difference value when the slab enters the soaking zone. If the third difference value is greater than 50°C, it indicates that the temperature difference between the surface temperature and the core temperature of the slab is large at this time. In this case, it is necessary to reduce the heating load of the soaking zone in the heating furnace. For example, reduce the heating load of the soaking zone from 45% to 40%.

[0046] By increasing the combined heating load of the first and second heating sections and / or decreasing the heating load of the soaking section when the temperature difference is greater than a set value, the difference between the surface temperature and the core temperature of the slab is controlled to equal the set value. Conversely, by decreasing the combined heating load of the first and second heating sections and / or increasing the heating load of the soaking section when the temperature difference is less than the set value, the temperature difference is controlled to equal the set value, ensuring that the surface temperature and core temperature of the slab meet a certain temperature difference requirement.

[0047] This application adjusts the total heating load of the first heating section and the second heating section to make the surface temperature of the slab more than 20°C higher than the core temperature, which promotes the shedding and creeping of the iron scale in the pit, enhances the overall heating uniformity of the slab, and improves the quality of the hot-rolled slab.

[0048] Furthermore, the heating furnace in this application can be a walking beam heating furnace, in which a walking beam is provided. In order to improve the surface quality of the slab, the method may further include: monitoring whether the walking beam is in the upper front position during the positive circulation motion of the walking beam carrying the slab; if it is in the upper front position, controlling the walking beam to stay in the current position for a preset time.

[0049] Optionally, the preset duration can be 5 to 30 seconds, for example: 10 seconds, 15 seconds or 20 seconds.

[0050] Of course, the preset duration can also be adjusted according to the actual steel tapping rhythm. For example, when the steel tapping rhythm is 115s, the preset duration is the first duration; when the steel tapping rhythm is 130s, the preset duration is the second duration.

[0051] It should be noted that the positive cycle of a walking beam refers to a complete cycle of movement in which the walking beam completes four actions in a certain order: rising, moving forward, falling, and moving backward.

[0052] like Figure 2 As shown, the initial position of the walking beam is usually set at the lower rear position. First, the walking beam rises, lifting the slab from the fixed beam to the upper rear position, where the slab contacts the movable beam. Then, it moves forward to the upper front position, still in contact with the movable beam, allowing the billet to move forward one step inside the furnace. Next, it descends to the lower front position, placing the billet on the fixed beam. Finally, it retreats back to the original lower rear position (initial position), thus completing one positive walking cycle. Through multiple cycles, the billet can move step by step from the furnace charging end to the discharge end.

[0053] Specifically, during the transfer of the slab in the heating furnace, the slab will come into contact with the fixed beam and the movable beam. That is, when the slab is in the original position, it is in contact with the fixed beam; when the slab is transported to the upper rear position, it is in contact with the movable beam; when the slab is transported to the upper front position, it is in contact with the movable beam; and when the slab is transported to the lower front position, it is in contact with the fixed beam.

[0054] Because silicon steel slabs are relatively soft at high temperatures, they are prone to pitting at the contact points with the fixed beams, which can also press in iron oxide scale or ferrous silicate, resulting in the infiltration of subcutaneous tissue into the slab. This application improves the probability of defects caused by pitting by changing the way the slab is transported within the furnace.

[0055] Specifically, when the slab is on the fixed beam, the risk of it being pressed into the dent of the fixed beam increases the risk of surface defects the longer it waits on the fixed beam. To reduce the damage to the slab caused by the fixed beam, during the slab transfer process, if the slab is detected to have been transported to the upper front position, the walking beam is controlled to remain at the current position for a preset time to increase the contact time between the slab and the moving beam. This method avoids the slab remaining in the original position after completing the cycle, waiting for steel to be tapped, which would increase the contact time between the slab and the fixed beam. By controlling the slab to wait in the upper front position for a preset time, the waiting time for steel to be tapped can be reduced to a certain extent, thereby improving the surface quality of the slab.

[0056] In one embodiment, when the walking beam reaches the upper front position, it remains in the upper front position for 15 seconds. Depending on the production rhythm, the contact time between the slab and the fixed beam in the furnace is reduced by 15% during the walking beam's movement of the slab.

[0057] For example, in a positive cycle, if the total contact time between the slab and the moving beam, and the contact time between the slab and the fixed beam, is 150 minutes, under the previous control method, the contact time of the moving beam was 50 minutes and the contact time of the fixed beam was 100 minutes. After adjustment, the contact time of the moving beam is 65 minutes and the contact time of the fixed beam is 85 minutes. The original total transportation time remains unchanged.

[0058] Of course, as another optional embodiment, the method may also include: monitoring whether the walking beam is in the upper rear position during the positive cycle motion of the walking beam carrying the slab; if it is in the upper rear position, controlling the walking beam to stay in the current position for a preset time.

[0059] This application effectively reduces the contact time between the slab and the fixed beam by adjusting the transfer method of the slab in the furnace during the positive circulation process and keeping it in the upper front or upper rear position for 5 to 30 seconds. This reduces the risk of the slab being pressed into the pit, significantly improves the surface quality of the slab, and solves the problem of micro-warping defects in the traditional transfer process.

[0060] Therefore, this application optimizes the slab transfer and heating methods within the furnace, enabling adaptive adjustment of the heating scheme based on the actual heating conditions of the billet. Considering the characteristics of silicon steel slabs, and addressing the problem that existing heating methods struggle to control the temperature distribution of the slab, leading to easier pressing of iron scale into the pits and affecting the overall quality of the slab, this method promotes the shedding and creeping of iron scale within the pits, enhancing the overall heating uniformity of the slab, improving the quality of the hot-rolled slab, and ensuring the stability and uniformity of the silicon steel slab during the heating process. Furthermore, addressing the lack of precise position monitoring and intelligent adjustment functions in traditional walking beam control systems, which fail to affect heating efficiency and furnace utilization, this application reduces the risk of iron scale pressing into the pits by adjusting the traditional slab transfer process in the heating furnace, significantly improving the surface quality of the slab and overcoming the defects of uneven heating and easy deformation of the slab in traditional processes. Furthermore, in response to the problem that the existing heating furnace has insufficient control precision in heating temperature and holding time, making it difficult to meet the heating requirements of continuous casting billets of different steel grades and specifications and affecting the hot delivery effect, the method of optimizing the transfer and heating of slabs in the furnace is adopted to achieve the stability and uniformity of silicon steel slabs during the heating process.

[0061] In summary, the furnace control method provided by this invention not only solves the problem of micro-warping defects in silicon steel slab heating furnaces, but also effectively reduces the risk of iron oxide scale or ferrous silicate being pressed into the subcutaneous structure of the slab, thereby improving the overall quality and performance of the slab. The control method is simple to operate, easy to implement, and has good practical value and promising application prospects, significantly improving the heating quality and production efficiency of silicon steel slabs.

[0062] Secondly, based on the same inventive concept, this embodiment provides a control device for a heating furnace, such as... Figure 3 As shown, it includes: Acquisition module 401 is used to acquire the difference between the surface temperature and the core temperature of the slab in the heating furnace; The load distribution module 402 is used to compare the difference with the set value, and redistribute the heating load of the first heating section, the second heating section and the soaking section in the heating furnace according to the comparison result.

[0063] As an optional embodiment, the total heating load of the first heating section, the second heating section, and the heat spreader is 100%, wherein the total heating load of the first heating section and the second heating section is 40-60%, and the heating load of the heat spreader is 60-40%.

[0064] As an optional embodiment, the set value includes a first set value. The acquisition module 401 is specifically used to: acquire a first difference between the surface temperature and the core temperature of the slab within a preset time after the slab enters the first heating section; the load distribution module 402 is specifically used to: compare the first difference with the first set value; if the first difference is greater than the first set value, increase the total heating load of the first heating section and the second heating section; if the first difference is less than the first set value, decrease the total heating load of the first heating section and the second heating section.

[0065] As an optional embodiment, the set value includes a second set value. The acquisition module 401 is specifically used to: acquire a second difference between the surface temperature and the core temperature of the slab within a preset time after the slab enters the second heating section; the load distribution module 402 is specifically used to: compare the second difference with the second set value; if the second difference is greater than the second set value, increase the total heating load of the first heating section and the second heating section; if the second difference is less than the second set value, decrease the total heating load of the first heating section and the second heating section.

[0066] As an optional embodiment, the set value includes a third set value. The acquisition module 401 is specifically used to: acquire a third difference between the surface temperature and core temperature of the slab within a preset time after the slab enters the soaking zone; the load distribution module 402 is specifically used to: compare the third difference with the third set value; if the third difference is greater than the third set value, reduce the heating load of the soaking zone in the heating furnace; if the third difference is less than the third set value, increase the heating load of the soaking zone in the heating furnace.

[0067] As an optional embodiment, the first setting value is between 50 and 200°C, the second setting value is between 30 and 150°C, and the third setting value is between 20 and 50°C.

[0068] As an optional embodiment, the heating furnace is equipped with a walking beam, and the device further includes: The dwell control module is used to monitor whether the walking beam is in the forward-upper position during the positive cycle motion of the walking beam carrying the slab; if it is in the forward-upper position, it controls the walking beam to stay in the current position for a preset time.

[0069] Each of the above modules can be implemented using software code, in which case they can be stored in the memory of the control device. Alternatively, each of the above modules can be implemented using hardware, such as integrated circuit chips.

[0070] The control device for a heating furnace provided in this embodiment of the invention has the same implementation principle and technical effect as the aforementioned method embodiment. For the sake of brevity, any parts not mentioned in the device embodiment can be referred to the corresponding content in the aforementioned method embodiment.

[0071] Thirdly, based on the same inventive concept, this embodiment provides an electronic device 500, such as... Figure 4 As shown, it includes: a memory 501, a processor 502, and a computer program 503 stored in the memory and executable on the processor. When the processor 502 executes the program, it implements the steps of the control method for the heating furnace described in the first aspect above.

[0072] Since the electronic device described in this embodiment is the electronic device used to implement the control method of the heating furnace in the embodiments of this application, those skilled in the art can understand the specific implementation and various variations of the electronic device in this embodiment based on the control method of the heating furnace described in the embodiments of this application. Therefore, how the electronic device implements the method in the embodiments of this application will not be described in detail here. Any electronic device used by those skilled in the art to implement the control method of the heating furnace in the embodiments of this application falls within the scope of protection of this application.

[0073] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, the present invention can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention can take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0074] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart illustrations and / or block diagrams. Figure 1 One or more processes and / or boxes Figure 1 A module that specifies the function in one or more boxes.

[0075] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction modules implemented in a process. Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0076] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0077] Although preferred embodiments of the invention have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of the invention.

[0078] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A control method of a heating furnace, characterized by, The method comprises the following steps: obtaining the difference between the surface temperature and the core temperature of the slab in the heating furnace; comparing the difference with a set value, and redistributing the heating load of the first heating section, the second heating section and the soaking section in the heating furnace according to the comparison result.

2. A method of controlling a furnace as defined in claim 1, characterized by The sum of the heating load of the first heating section, the second heating section and the soaking section is 100%, wherein the sum of the heating load of the first heating section and the second heating section is 40-60%, and the heating load of the soaking section is 60-40%.

3. The control method for a heating furnace as described in claim 1, characterized in that, The set value comprises a first set value, the method of obtaining the difference between the surface temperature and the core temperature of the slab in the heating furnace, comparing the difference with a set value, and redistributing the heating load of the first heating section, the second heating section and the soaking section in the heating furnace according to the comparison result comprises: obtaining the first difference between the surface temperature and the core temperature of the slab within a preset time period after the slab enters the first heating section; comparing the first difference with the first set value, and increasing the sum of the heating load of the first heating section and the second heating section if the first difference is greater than the first set value; decreasing the sum of the heating load of the first heating section and the second heating section if the first difference is less than the first set value.

4. A method of controlling a furnace as defined in claim 3, characterized in that The set value further comprises a second set value, the method of obtaining the difference between the surface temperature and the core temperature of the slab in the heating furnace, comparing the difference with a set value, and redistributing the heating load of the first heating section, the second heating section and the soaking section in the heating furnace according to the comparison result further comprises: obtaining the second difference between the surface temperature and the core temperature of the slab within a preset time period after the slab enters the second heating section; comparing the second difference with the second set value, and increasing the sum of the heating load of the first heating section and the second heating section if the second difference is greater than the second set value; decreasing the sum of the heating load of the first heating section and the second heating section if the second difference is less than the second set value.

5. A method of controlling a furnace as defined in claim 4, characterized in that The set value further comprises a third set value, the method of obtaining the difference between the surface temperature and the core temperature of the slab in the heating furnace, comparing the difference with a set value, and redistributing the heating load of the first heating section, the second heating section and the soaking section in the heating furnace according to the comparison result further comprises: obtaining the third difference between the surface temperature and the core temperature of the slab within a preset time period after the slab enters the soaking section; comparing the third difference with the third set value, and decreasing the heating load of the soaking section in the heating furnace if the third difference is greater than the third set value; increasing the heating load of the soaking section in the heating furnace if the third difference is less than the third set value.

6. A method of controlling a furnace as defined in claim 5, characterized in that The first set value is between 50-200℃, the second set value is between 30-150℃, and the third set value is between 20-50℃.

7. The method of claim 1, wherein the step of determining the temperature of the furnace is performed by a temperature sensor. The heating furnace is provided with a walking beam, and the method further comprises: In the process that the walking beam carries the slab to do the positive circulation movement, whether the walking beam is in the front upper position is monitored; If in the front upper position, the walking beam is controlled to stay at the current position for a preset time length.

8. A control device for a heating furnace, characterized by comprising: The method comprises the steps of: An acquisition module is configured to acquire a difference between a surface temperature and a core temperature of a slab in a heating furnace; A load distribution module is configured to compare the difference with a set value, and re-distribute heating loads of a first heating section, a second heating section and a soaking section in the heating furnace according to a comparison result.

9. An electronic device, comprising: The computer program is stored in the memory and executable in the processor, and the processor executes the program to realize the steps of the method in any one of claims 1-7. The program is executed in the processor to realize the steps of the method in any one of claims 1-7.

10. A computer-readable storage medium having stored thereon a computer program, characterized in that, ​

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