Furnace temperature control method and device of annealing furnace, annealing furnace and storage medium

Abstract

The embodiment of the invention provides a furnace temperature control method and device of an annealing furnace, the annealing furnace and a computer readable storage medium, and relates to the technical field of metallurgy. The method comprises the steps that when a preset target furnace temperature is received, the current furnace temperature of the annealing furnace is obtained, and a raw material steel coil displacement tracking mode is started; and in the raw material steel coil position tracking mode, when a raw material steel coil welding completion signal sent by the welding machine is received and the target furnace temperature is larger than the current furnace temperature, the furnace temperature of the annealing furnace is adjusted to the target furnace temperature from the current furnace temperature. According to the embodiment of the invention, the temperature rise control is performed on the furnace temperature in advance in the temperature rise stage of the annealing furnace, so that the performance of the raw material steel coil in the annealing furnace is effectively ensured, and the furnace temperature adjustment efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of metallurgical technology, and particularly to a method and device for controlling the furnace temperature of an annealing furnace, an annealing furnace, and a storage medium. Background Art

[0002] Continuous annealing is a production method in which the strip steel continuously passes through the annealing furnace. The annealing furnace has no seal, and the strip steel is directly coiled without staying. The purpose of annealing cold-rolled strip steel is to reduce strong cold work hardening and improve the forming performance of thin plates. Generally, annealing is carried out above the recrystallization temperature, so that a soft structure with good cold forming performance can be obtained. During the production process, the strip steel in the annealing furnace needs to run continuously and stably, and the furnace temperature of the annealing furnace is an important index to ensure the performance of the strip steel.

[0003] In order to ensure the performance of the strip steel, production positions need to adjust the furnace temperature of each section one by one according to technical requirements. The efficiency of manual adjustment is often low, and there is a risk of mistakes. Summary of the Invention

[0004] The present application provides a method and device for controlling the furnace temperature of an annealing furnace, an annealing furnace, and a storage medium, which are used to solve the problem of low efficiency of furnace temperature adjustment in the prior art.

[0005] According to one aspect of the embodiments of the present application, a method for controlling the furnace temperature of an annealing furnace is provided. The method includes:

[0006] When a preset target furnace temperature is received, obtain the current furnace temperature of the annealing furnace, and enter the raw material steel coil displacement tracking mode;

[0007] In the raw material steel coil position tracking mode, when a welding completion signal for the raw material steel coil sent by the welder is received and the target furnace temperature is greater than the current furnace temperature, adjust the furnace temperature of the annealing furnace from the current furnace temperature to the target furnace temperature.

[0008] In a possible implementation manner, after obtaining the current furnace temperature of the annealing furnace, the method includes:

[0009] When a welding completion signal sent by the welder is received and the target furnace temperature is less than the current furnace temperature, keep the current furnace temperature of the annealing furnace unchanged.

[0010] In a possible implementation manner, a second weld detector is configured at the outlet of the annealing furnace. After keeping the current furnace temperature of the annealing furnace unchanged, the method includes:

[0011] When the second weld detector detects the weld of the raw material steel coil in the annealing furnace, adjust the furnace temperature of the annealing furnace from the current furnace temperature to the target furnace temperature.

[0012] In yet another possible implementation, the inlet of the annealing furnace is configured with a first weld detector. After adjusting the furnace temperature of the annealing furnace from the current furnace temperature to the target furnace temperature, it includes:

[0013] Determine the first moment when the first weld detector detects the weld of the raw material steel coil, and the second moment when the second weld detector detects the weld of the raw material steel coil;

[0014] Obtain the unit speed of the annealing furnace;

[0015] Determine the moving distance of the weld based on the first moment, the second moment, and the unit speed.

[0016] In yet another possible implementation, after determining the moving distance of the weld based on the first moment, the second moment, and the unit speed, it includes:

[0017] Calibrate at least one of the first weld detector and the second weld detector based on the moving distance and the length of the furnace bottom plate of the annealing furnace.

[0018] In another possible implementation, before obtaining the current furnace temperature of the annealing furnace, it includes:

[0019] When the target furnace temperature is 0 °C, keep the current furnace temperature of the annealing furnace unchanged and issue a temperature anomaly reminder.

[0020] In another possible implementation, the raw material steel coil includes silicon steel.

[0021] According to another aspect of the embodiments of the present application, there is provided a furnace temperature control device for an annealing furnace, which is applied to the annealing furnace. The device includes:

[0022] An acquisition module, configured to obtain the current furnace temperature of the annealing furnace and enter the raw material steel coil displacement tracking mode when receiving a preset target furnace temperature;

[0023] An adjustment module, configured to, in the raw material steel coil position tracking mode, when receiving a welding completion signal sent by the welder and the target furnace temperature is greater than the current furnace temperature, adjust the furnace temperature of the annealing furnace from the current furnace temperature to the target furnace temperature.

[0024] According to another aspect of the embodiments of the present application, there is provided an annealing furnace, which includes: a memory, a processor, and a computer program stored on the memory. The processor executes the computer program to implement the steps of the method shown in the first aspect of the embodiments of the present application.

[0025] According to yet another aspect of the embodiments of the present application, there is provided a computer-readable storage medium, on which a computer program is stored. When the computer program is executed by a processor, the steps of the method shown in the first aspect of the embodiments of the present application are implemented.

[0026] The beneficial effects brought by the technical solution provided in the embodiment of the present application are as follows:

[0027] In the embodiment of the present application, the received target furnace temperature is compared with the currently obtained furnace temperature of the annealing furnace. When the welding completion signal sent by the welder is received and the target furnace temperature is greater than the current furnace temperature, the furnace temperature of the annealing furnace is adjusted from the current furnace temperature to the target furnace temperature; it realizes the adjustment of the furnace temperature in advance during the heating stage of the annealing furnace, and the furnace temperature can be increased after the raw steel coil is welded. After the raw steel coil reaches the annealing furnace, the furnace temperature is within the preset process requirement range, effectively ensuring the performance of the raw steel coil in the annealing furnace and improving the efficiency of furnace temperature adjustment. Description of the Drawings

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0029] Figure 1 It is a schematic flow chart of a method for controlling the furnace temperature of an annealing furnace provided in an embodiment of the present application;

[0030] Figure 2 It is a schematic structural diagram of an annealing furnace system in a method for controlling the furnace temperature of an annealing furnace provided in an embodiment of the present application;

[0031] Figure 3 It is a schematic flow chart of a method for controlling the furnace temperature of an annealing furnace for an example provided in an embodiment of the present application;

[0032] Figure 4 It is a schematic structural diagram of a device for controlling the furnace temperature of an annealing furnace provided in an embodiment of the present application. Detailed Embodiments

[0033] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. However, it should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the present disclosure. In addition, in the following description, the descriptions of well-known structures and technologies are omitted to avoid unnecessarily confusing the concepts of the present disclosure.

[0034] Various structural schematic diagrams according to embodiments of the present disclosure are shown in the accompanying drawings. These figures are not drawn to scale, where for the purpose of clear expression, some details are enlarged and some details may be omitted. The shapes of various regions and layers shown in the figures, as well as their relative sizes and positional relationships, are merely exemplary and may deviate in practice due to manufacturing tolerances or technical limitations. Those skilled in the art can additionally design regions / layers with different shapes, sizes, and relative positions according to actual needs.

[0035] In the context of the present disclosure, when a layer / element is referred to as being "on" another layer / element, the layer / element can be directly on the other layer / element, or there can be an intermediate layer / element between them. Additionally, if a layer / element is "on" another layer / element in one orientation, then when the orientation is reversed, the layer / element can be "under" the other layer / element.

[0036] First, the terms involved in this application are explained:

[0037] Continuous annealing. Continuous annealing is relative to batch annealing. Continuous annealing is a production method in which strip steel continuously passes through an annealing furnace. The annealing furnace has no seal, and the strip steel is directly coiled without staying. In production applications, continuous annealing is widely used. Continuous annealing makes the deformed grains re-transform into uniform equiaxed grains, while eliminating work hardening and residual internal stress, and restoring the structure and properties of the steel to the state before cold deformation. The purpose of annealing cold-rolled strip steel is to reduce strong cold work hardening and improve the formability of thin sheets. Usually, annealing is carried out above the recrystallization temperature, so that a soft structure with good cold forming properties can be obtained.

[0038] The continuous annealing unit mainly includes an entry coil-up area, a welder, an annealing furnace, an exit coil-down area, etc. During production, the strip steel in the annealing furnace needs to run continuously and stably; during the production process of changing steel grades of different specifications, the temperatures of each section of the annealing furnace need to be adjusted. During this period, in order to ensure the performance of the strip steel, production personnel need to adjust the furnace temperature of each section one by one according to technical requirements, which requires relatively high personnel quality and there is a risk of mistakes.

[0039] The inventors found that when adjusting the temperature increase of the annealing furnace, the annealing furnace can be preheated, while when adjusting the temperature decrease, the annealing furnace needs to cool down laggingly to ensure the performance of the strip steel. Therefore, during the production process, precise control of the furnace temperature of the annealing furnace is very important.

[0040] Next, specific embodiments will be used to elaborate in detail on the technical solution of the present application and how the technical solution of the present application solves the above technical problems. The following several specific embodiments can be combined with each other, and the same or similar concepts or processes may not be repeated in some embodiments. The embodiments of the present application will be described below in conjunction with the accompanying drawings.

[0041] A furnace temperature control method for an annealing furnace is provided in an embodiment of the present application. As Figure 1 shown, it can be applied to an annealing furnace, and the method includes:

[0042] S101, when a preset target furnace temperature is received, obtain the current furnace temperature of the annealing furnace and enter the raw material steel coil displacement tracking mode.

[0043] Among them, the target furnace temperature can be determined according to process requirements, production data, steel coil data, etc. The current furnace temperature can be obtained in real time based on the thermometer inside the annealing furnace, or can be the set furnace temperature received by the annealing furnace during the last furnace temperature adjustment.

[0044] S102, in the raw material steel coil position tracking mode, when a welding completion signal for the raw material steel coil sent by the welder is received and the target furnace temperature is greater than the current furnace temperature, adjust the furnace temperature of the annealing furnace from the current furnace temperature to the target furnace temperature.

[0045] When the target furnace temperature is greater than the current furnace temperature, that is, during the heating-up stage of the annealing furnace, when the annealing furnace receives the welding completion information sent by the welder, the furnace temperature of the annealing furnace can be advanced from the current furnace temperature to the target furnace temperature, realizing early heating-up and effectively improving the performance of the raw material steel coil.

[0046] In the embodiment of the present application, by comparing the received target furnace temperature with the currently obtained furnace temperature of the annealing furnace, when a welding completion signal sent by the welder is received and the target furnace temperature is greater than the current furnace temperature, the furnace temperature of the annealing furnace is adjusted from the current furnace temperature to the target furnace temperature; realizing early adjustment of the furnace temperature during the heating-up stage of the annealing furnace, the furnace temperature can be increased after the raw material steel coil is welded, so that after the raw material steel coil reaches the annealing furnace, the furnace temperature is within the preset process requirement range, effectively ensuring the performance of the raw material steel coil in the annealing furnace and improving the furnace temperature adjustment efficiency.

[0047] A possible implementation manner is provided in the embodiment of the present application. After obtaining the current furnace temperature of the annealing furnace as described above, it includes:

[0048] When a welding completion signal sent by the welder is received and the target furnace temperature is less than the current furnace temperature, keep the current furnace temperature of the annealing furnace unchanged.

[0049] In the embodiment of the present application, when the target furnace temperature is lower than the current furnace temperature, the annealing furnace is in the cooling stage. At this time, after receiving the welding completion signal sent by the welder, the furnace temperature is not adjusted first. Instead, the temperature adjustment can be carried out after the raw steel coil after welding reaches the outlet of the annealing furnace, realizing the lag adjustment during the cooling of the annealing furnace and further ensuring the performance of the raw steel coil.

[0050] A possible implementation manner is provided in the embodiment of the present application. A second weld detector is arranged at the outlet of the above annealing furnace. After keeping the current furnace temperature of the annealing furnace unchanged, it includes:

[0051] When the second weld detector detects the weld of the raw steel coil in the annealing furnace, the furnace temperature of the annealing furnace is adjusted from the current furnace temperature to the target furnace temperature.

[0052] In the embodiment of the present application, the second weld detector at the outlet of the annealing furnace is used to track the weld of the welded steel coil. When it is detected that the weld moves out of the annealing furnace, the furnace temperature of the annealing furnace is decreased from the current furnace temperature to the target furnace temperature, realizing the lag control of the cooling of the annealing furnace; before the steel coil runs to the outlet of the annealing furnace, the relatively high current furnace temperature can be maintained, and the magnetic properties of the steel coil will not be affected at the relatively high furnace temperature, avoiding the decrease of the magnetic induction of the steel coil during premature cooling.

[0053] A possible implementation manner is provided in the embodiment of the present application. A first weld detector is arranged at the inlet of the above annealing furnace. After adjusting the furnace temperature of the annealing furnace from the current furnace temperature to the target furnace temperature, it includes:

[0054] Determine the first moment when the first weld detector detects the weld of the raw steel coil and the second moment when the second weld detector detects the weld of the raw steel coil;

[0055] Obtain the unit speed of the annealing furnace;

[0056] Determine the moving distance of the weld based on the first moment, the second moment and the unit speed.

[0057] In the embodiment of the present application, after welding is completed, weld signals are obtained based on at least two weld detectors. The first moment when the first weld detector detects the weld of the raw steel coil is t0, the second moment when the second weld detector detects the weld of the raw steel coil is t1, and the unit speed is V. The running distance L1 of the weld can be calculated based on the following formula (1):

[0058]

[0059] After calculating the running distance L1, the weld detector can be calibrated. The specific steps are as follows:

[0060] In an embodiment of the present application, a possible implementation is provided. After determining the moving distance of the weld seam based on the first moment, the second moment, and the unit speed, the following steps are included:

[0061] Calibrate at least one of the first weld detector and the second weld detector based on the moving distance and the length of the furnace bottom plate of the annealing furnace.

[0062] In an embodiment of the present application, when the running distance L1 of the weld seam is equal to the length L0 of the furnace bottom plate of the annealing furnace, it can be considered that the detection signals of the first weld detector and the second weld detector are sent accurately; when the running distance L1 of the weld seam is not equal to the length L0 of the furnace bottom plate of the annealing furnace, it can be considered that the detection signals of the first weld detector and the second weld detector are inaccurate, and signal calibration is required for the two weld detectors. In an embodiment of the present application, by calculating the running distance of the weld seam, the signals of the weld detectors are calibrated, further improving the accuracy of furnace temperature control.

[0063] In an embodiment of the present application, a possible implementation is provided. Before obtaining the current furnace temperature of the annealing furnace, the following steps are included:

[0064] When the target furnace temperature is 0 °C, keep the current furnace temperature of the annealing furnace unchanged and issue a temperature abnormality reminder.

[0065] In an embodiment of the present application, when the target furnace temperature is 0 °C, process system failures or failures such as no process temperature for the adjusted material may occur. In this case, it is necessary to keep the current furnace temperature unchanged, and the annealing furnace can issue a temperature abnormality reminder to remind technicians to check and repair the fault situation; ensuring the reliability of the furnace temperature control of the annealing furnace.

[0066] In an embodiment of the present application, a possible implementation is provided. The above raw material steel coil may include silicon steel or adjusted material.

[0067] To better understand the above furnace temperature control method of the annealing furnace, it is applied to an annealing furnace system. The structure of the annealing furnace system is as Figure 2 shown. After the steel coil is welded at the welder 201, the weld seam can reach point A at the outlet of the welder, and then it is transported to the annealing furnace 202; the first weld detector 203 is located at the entrance of the annealing furnace 202, and the second weld detector 204 is located at point B at the outlet of the annealing furnace 202. The following will combine Figure 2 and Figure 3 to elaborate in detail an example of the furnace temperature control method of the annealing furnace of the present application. The method includes the following steps:

[0068] S201, when the steel coil is welded at the welder 201, the weld seam is at point A. The secondary system issues the process temperature set value PV1 to the annealing furnace 202. At this time, the current furnace temperature of the annealing furnace is PV2.

[0069] S202. When the annealing furnace is in the heating-up stage and the process temperature set value PV1 is greater than the current furnace temperature PV2, the larger value PV1 can be selected by the signal selector as the next-stage target furnace temperature of the annealing furnace, and then the current furnace temperature can be adjusted to PV1 based on the furnace temperature controller to achieve the early heating-up of the annealing furnace temperature.

[0070] When the annealing furnace is in the cooling-down stage and the process temperature set value PV1 is less than the current furnace temperature PV2, the larger value PV2 can be selected by the signal selector as the next-stage target furnace temperature of the annealing furnace, and then the furnace temperature of the annealing furnace can be kept unchanged.

[0071] S203. When it is detected by the second weld detector 204 that the weld of the steel coil moves to the B point position, the current furnace temperature can be directly adjusted to PV1 based on the furnace temperature controller.

[0072] Specifically, when the annealing furnace is in the heating-up stage and the furnace temperature is already PV1, there is no need to adjust.

[0073] When the annealing furnace is in the cooling-down stage and the current furnace temperature is still PV2, the furnace temperature is adjusted to PV1 to achieve the delayed cooling of the annealing furnace temperature.

[0074] The embodiment of the present application provides a furnace temperature control device for an annealing furnace, which is applied to the annealing furnace. As Figure 4 shown, the furnace temperature control device 40 of the annealing furnace may include: an acquisition module 401 and an adjustment module 402;

[0075] Among them, the acquisition module 401 is configured to, when receiving a preset target furnace temperature, acquire the current furnace temperature of the annealing furnace and enter the raw material steel coil displacement tracking mode;

[0076] The adjustment module 402 is configured to, in the raw material steel coil position tracking mode, when receiving a welding completion signal sent by the welder and the target furnace temperature is greater than the current furnace temperature, adjust the furnace temperature of the annealing furnace from the current furnace temperature to the target furnace temperature.

[0077] In a possible implementation manner provided in the embodiment of the present application, after the acquisition module 401 acquires the current furnace temperature of the annealing furnace, it is used for:

[0078] When receiving a welding completion signal sent by the welder and the target furnace temperature is less than the current furnace temperature, keep the current furnace temperature of the annealing furnace unchanged.

[0079] In a possible implementation manner provided in the embodiment of the present application, a second weld detector is configured at the outlet of the annealing furnace. After the acquisition module 401 keeps the current furnace temperature of the annealing furnace unchanged, it is used for:

[0080] When the second weld detector detects the weld of the raw steel coil in the annealing furnace, the furnace temperature of the annealing furnace is adjusted from the current furnace temperature to the target furnace temperature.

[0081] In an embodiment of the present application, a possible implementation is provided. The entrance of the above-mentioned annealing furnace is configured with a first weld detector. After the acquisition module 401 adjusts the furnace temperature of the annealing furnace from the current furnace temperature to the target furnace temperature, it is used for:

[0082] Determine the first moment when the first weld detector detects the weld of the raw steel coil and the second moment when the second weld detector detects the weld of the raw steel coil;

[0083] Obtain the unit speed of the annealing furnace;

[0084] Based on the first moment, the second moment, and the unit speed, determine the moving distance of the weld.

[0085] In an embodiment of the present application, a possible implementation is provided. After the acquisition module 401 determines the moving distance of the weld based on the first moment, the second moment, and the unit speed, it is used for:

[0086] Calibrate at least one of the first weld detector and the second weld detector based on the moving distance and the length of the furnace bottom plate of the annealing furnace.

[0087] In an embodiment of the present application, a possible implementation is provided. Before the acquisition module 401 obtains the current furnace temperature of the annealing furnace, it is used for:

[0088] When the target furnace temperature is 0 °C, keep the current furnace temperature of the annealing furnace unchanged and issue a temperature anomaly reminder.

[0089] In an embodiment of the present application, a possible implementation is provided. The above-mentioned raw steel coil includes silicon steel.

[0090] The device in the embodiment of the present application can execute the method provided in the embodiment of the present application, and its implementation principle is similar. The actions performed by each module in the device in the embodiments of the present application correspond to the steps in the method in the embodiments of the present application. For the detailed function descriptions of each module of the device, reference can be specifically made to the descriptions in the corresponding methods shown above, and details are not described herein again.

[0091] In the embodiment of the present application, the received target furnace temperature is compared with the currently obtained furnace temperature of the annealing furnace. When the welding completion signal sent by the welder is received and the target furnace temperature is greater than the current furnace temperature, the furnace temperature of the annealing furnace is adjusted from the current furnace temperature to the target furnace temperature; it realizes that in the heating stage of the annealing furnace, the furnace temperature is adjusted in advance, and the furnace temperature can be increased after the raw steel coil is welded, so that after the raw steel coil reaches the annealing furnace, the furnace temperature is within the preset process requirement range, effectively ensuring the performance of the raw steel coil in the annealing furnace and improving the furnace temperature adjustment efficiency.

[0092] In an embodiment of the present application, an annealing furnace is provided, which includes a memory, a processor, and a computer program stored on the memory. The processor executes the above computer program to implement the steps of the furnace temperature control method of the annealing furnace. Compared with the related art, it can be realized that in the embodiment of the present application, the received target furnace temperature is compared with the currently obtained furnace temperature of the annealing furnace. When a welding completion signal sent by the welding machine is received and the target furnace temperature is greater than the current furnace temperature, the furnace temperature of the annealing furnace is adjusted from the current furnace temperature to the target furnace temperature; it realizes that in the heating stage of the annealing furnace, the furnace temperature is adjusted in advance, and the furnace temperature can be increased after the raw material steel coil is welded. After the raw material steel coil reaches the annealing furnace, the furnace temperature is within the preset process requirement range, effectively ensuring the performance of the raw material steel coil in the annealing furnace and improving the efficiency of furnace temperature adjustment.

[0093] In an alternative embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, it implements the steps shown in the foregoing method embodiment.

[0094] In the above description, no detailed description is made of the technical details such as the composition of each layer. However, those skilled in the art should understand that various technical means can be used to form layers, regions, etc. of the required shapes. In addition, in order to form the same structure, those skilled in the art can also design methods that are not exactly the same as the methods described above. In addition, although the above embodiments are described separately, this does not mean that the measures in each embodiment cannot be used advantageously in combination.

[0095] Although the preferred embodiments of the present application have been described, those skilled in the art can make additional changes and modifications to these embodiments once they know the basic creative concept. Therefore, the appended claims are intended to be construed as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0096] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application is also intended to include these changes and modifications.

Claims

1. A method for controlling the temperature of an annealing furnace, characterized in that: The method comprises: When the preset target furnace temperature is received, the current furnace temperature of the annealing furnace is obtained, and a raw steel coil displacement tracking mode is entered; In the raw steel coil position tracking mode, when a welding completion signal for the raw steel coil is received from the welder and the target furnace temperature is greater than the current furnace temperature, the furnace temperature of the annealing furnace is adjusted from the current furnace temperature to the target furnace temperature.

2. The method according to claim 1, characterized in that After obtaining the current furnace temperature of the annealing furnace, the method further includes: When a welding completion signal sent by the welding machine is received and the target furnace temperature is lower than the current furnace temperature, the current furnace temperature of the annealing furnace is kept unchanged.

3. The method according to claim 2, characterized in that The outlet of the annealing furnace is provided with a second weld detector; After maintaining the current furnace temperature of the annealing furnace unchanged, the method further includes: When the second weld detector detects the weld of the raw steel coil in the annealing furnace, the furnace temperature of the annealing furnace is adjusted from the current furnace temperature to the target furnace temperature.

4. The method according to claim 3, characterized in that The entrance of the annealing furnace is provided with a first weld detector; After adjusting the furnace temperature of the annealing furnace from the current furnace temperature to the target furnace temperature, the method further includes: Determining a first moment when the first weld detector detects a weld of the raw steel coil, and a second moment when the second weld detector detects a weld of the raw steel coil; Obtaining the unit speed of the annealing furnace; The moving distance of the weld is determined based on the first moment, the second moment and the unit speed.

5. The method according to claim 4, characterized in that After determining the moving distance of the weld based on the first moment, the second moment and the unit speed, the method further includes: At least one of the first weld detector and the second weld detector is calibrated based on the moving distance and the length of the furnace bottom plate of the annealing furnace.

6. The method according to claim 1, characterized in that Before obtaining the current furnace temperature of the annealing furnace, the method further includes: When the target furnace temperature is 0° C., the current furnace temperature of the annealing furnace is kept unchanged, and a temperature abnormality reminder is issued.

7. The method according to claim 1, characterized in that The raw steel coil includes silicon steel.

8. A furnace temperature control device for an annealing furnace, applied to the annealing furnace, characterized in that: The device comprises: An acquisition module, used for acquiring the current furnace temperature of the annealing furnace and entering a raw steel coil displacement tracking mode when a preset target furnace temperature is received; The adjustment module is used to adjust the furnace temperature of the annealing furnace from the current furnace temperature to the target furnace temperature when a welding completion signal for the raw steel coil is received from the welder in the raw steel coil position tracking mode and the target furnace temperature is greater than the current furnace temperature.

9. An annealing furnace, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the method according to any one of claims 1 to 7 when executing the computer program.

10. A storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the steps of the method according to any one of claims 1 to 7 are implemented.

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