Annealing process apparatus, soaking control method, device, apparatus, and storage medium

Abstract

Embodiments of the present application provide annealing process equipment, soaking control method and device, equipment and storage medium. Based on the rated transmission speed of the annealing furnace and the soaking time threshold, the total length and the total pass quantity of soaking are determined, and based on the total length of soaking and the preset performance parameters of the annealing furnace, the soaking treatment time corresponding to different thickness specifications of strip steel is determined. Since different thickness specifications include preset thickness specifications, the critical soaking treatment time corresponding to the preset thickness specification of strip steel can be used to determine the critical pass quantity from the total pass quantity, and based on the critical pass quantity, the critical thickness specification of the strip steel is determined. Finally, the actual temperature in the annealing furnace can be controlled based on the critical thickness specification, different temperature controls are realized for strip steels of different thickness specifications, and the soaking treatment time difference between strip steels of different thickness specifications can be reduced, and the heat treatment performance between strip steels of different thickness specifications can be reduced.

Description

Technical Field

[0001] This invention relates to the field of metallurgical technology, and in particular to annealing process equipment, heat homogenization control methods, devices, equipment and storage media. Background Technology

[0002] The cold-rolling vertical annealing furnace is mainly used to anneal acid-rolled hard coils, so that the properties of the hard coils meet the preset requirements for subsequent deep processing. The conventional annealing furnace includes preheating, heating, homogenization, cooling, over-aging, final cooling, and water quenching processes.

[0003] For the heat soaking process, the main process control point is the duration. Due to the influence of heating and cooling capacity as well as the inlet and outlet production cycles, the heat soaking time varies for strips of the same steel grade but different specifications. Specifically, thin strips have a faster transport speed and a shorter heat soaking time, and their properties tend to be harder; thick strips have a slower transport speed and a longer heat soaking time, and their properties tend to be softer.

[0004] Therefore, current vertical annealing furnaces have a problem of excessively different soaking times when processing strips of the same steel grade but different thicknesses and specifications, resulting in inconsistent heat treatment performance of strips of the same steel grade but different specifications. Summary of the Invention

[0005] The embodiments of the present invention solve the technical problem that existing annealing furnaces have large differences in the heat homogenization time when annealing strips of different specifications of the same steel grade, resulting in inconsistent strip properties by providing annealing process equipment, heat homogenization control method, device, equipment and storage medium.

[0006] In a first aspect, the present invention provides a homogenization control method for an annealing furnace through an embodiment of the invention. The method includes: determining the total length and total number of homogenization passes based on the rated transport speed of the annealing furnace and a homogenization time threshold; determining the homogenization treatment time corresponding to strip steel of different thicknesses based on the total homogenization length and preset performance parameters of the annealing furnace, wherein the different thicknesses include preset thicknesses; determining the critical number of passes from the total number of passes using the critical homogenization treatment time corresponding to the preset thicknesses of the strip steel, and determining the critical thickness of the strip steel based on the critical number of passes; and controlling the actual temperature in the annealing furnace based on the critical thickness.

[0007] Preferably, determining the total length and total number of heat soaking passes based on the rated conveying speed of the annealing furnace and the heat soaking time threshold includes: determining the total length of heat soaking based on the product of the rated conveying speed and the heat soaking time threshold; and determining the total number of passes based on the total length of heat soaking and the pass length of the annealing furnace.

[0008] Preferably, the heat homogenization includes multiple sections, and determining the heat homogenization treatment time corresponding to strip steel of different thicknesses based on the total length of the heat homogenization and the preset performance parameters of the annealing furnace includes: determining the heat homogenization treatment time corresponding to strip steel of different thicknesses based on the ratio of the length of the multiple heat homogenization sections to the preset performance parameters of the annealing furnace.

[0009] Preferably, determining the number of critical passes from the total number of passes using the critical heat treatment time corresponding to the preset thickness specification strip includes: determining whether the critical heat treatment time is greater than the heat treatment time threshold; if so, matching the number of passes corresponding to the critical heat treatment time from the total number of passes to determine the number of critical passes.

[0010] Preferably, determining the critical thickness specification of the strip steel based on the number of critical passes includes: determining the critical thickness specification of the strip steel based on the soaking time threshold, the preset performance parameters of the annealing furnace, the number of critical passes, and the total number of passes.

[0011] Preferably, the method further includes: determining the installation position of the pyrometer in the annealing furnace using the critical number of passes.

[0012] Secondly, according to one embodiment of the present invention, a heat equalization control device is provided for use in an annealing furnace, the device comprising:

[0013] The first calculation unit is used to determine the total length and total number of heat soaking passes based on the rated transmission speed of the annealing furnace and the heat soaking time threshold.

[0014] The second calculation unit is used to determine the soaking time corresponding to strip steel of different thicknesses based on the total length of the soaking and the preset performance parameters of the annealing furnace, wherein the different thicknesses include preset thicknesses.

[0015] The critical condition determination unit is used to determine the number of critical passes from the total number of passes by using the critical soaking time corresponding to the preset thickness specification strip steel, and to determine the critical thickness specification of the strip steel based on the number of critical passes.

[0016] A temperature control unit is used to control the actual temperature in the annealing furnace based on the critical thickness specification.

[0017] Thirdly, through one embodiment of the present invention, a heat dissipation control device is provided, including 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 any of the embodiments in the first aspect.

[0018] Fourthly, through an embodiment of the present invention, an annealing process apparatus is provided, including the heat homogenization control device described in the third aspect, and an annealing furnace electrically connected to the heat homogenization control device.

[0019] Fifthly, through one embodiment of the present invention, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements any of the embodiments in the first aspect.

[0020] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages:

[0021] First, based on the rated conveyor speed and soaking time threshold of the annealing furnace, the total soaking length and the total number of passes are determined. Then, based on the total soaking length and the preset performance parameters of the annealing furnace, the soaking time corresponding to different thickness specifications of strip steel is determined. Since different thickness specifications include preset thickness specifications, the critical number of passes can be determined from the total number of passes using the critical soaking time corresponding to the preset thickness specifications of strip steel, and the critical thickness specification of the strip steel can be determined based on the number of critical passes. Finally, based on the critical thickness specification, the actual temperature in the annealing furnace can be controlled to achieve different temperature controls for strip steel of different thickness specifications, thereby reducing the difference in soaking time between strip steel of different thickness specifications and narrowing the difference in heat treatment performance between strip steel of different thickness specifications. Attached Figure Description

[0022] 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.

[0023] Figure 1 This is a flowchart of the heat dissipation control method in an embodiment of the present invention;

[0024] Figure 2 This is a schematic diagram illustrating the relationship between the heat treatment duration and strip thickness in an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the installation of the annealing furnace pyrometer in an embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram showing the homogenization treatment time for strips of the same steel grade but different thicknesses under homogenization control according to an embodiment of the present invention.

[0027] Figure 5This is a schematic diagram of the installation of a high-temperature gauge in an annealing furnace in the prior art;

[0028] Figure 6 This is a schematic diagram showing the homogenization treatment time for strip steel of the same steel grade but different thicknesses under existing homogenization control technology.

[0029] Figure 7 This is a schematic diagram of the installation of the annealing furnace pyrometer under the first critical number of passes according to the present invention;

[0030] Figure 8 for Figure 7 The diagram shown illustrates the soaking heat treatment time for different thicknesses of the same steel strip in the annealing furnace.

[0031] Figure 9 This is a schematic diagram of the installation of the annealing furnace pyrometer under the second critical number of passes according to an embodiment of the present invention;

[0032] Figure 10 for Figure 9 The diagram shown illustrates the soaking heat treatment time for different thicknesses of the same steel strip in the annealing furnace.

[0033] Figure 11 This is a schematic diagram of the installation of the annealing furnace pyrometer under the third critical number of passes according to an embodiment of the present invention;

[0034] Figure 12 for Figure 11 The diagram shown illustrates the soaking heat treatment time for different thicknesses of the same steel strip in the annealing furnace.

[0035] Figure 13 This is a schematic diagram of the heat dissipation control device structure in an embodiment of the present invention;

[0036] Figure 14 This is a schematic diagram of the heat dissipation control device structure in an embodiment of the present invention;

[0037] Figure 15 This is a schematic diagram of a computer-readable storage medium structure in an embodiment of the present invention. Detailed Implementation

[0038] The embodiments of the present invention solve the technical problem that existing annealing furnaces have large differences in the heat homogenization time when annealing strips of different specifications of the same steel grade, resulting in inconsistent strip properties by providing annealing process equipment, heat homogenization control method, device, equipment and storage medium.

[0039] The technical solution provided by the embodiments of the present invention is to solve the above-mentioned technical problems, and the general idea is as follows:

[0040] First, based on the rated conveying speed of the annealing furnace and the threshold for soaking time, the total length and number of soaking passes are determined. Then, based on the total length of soaking and the preset performance parameters of the annealing furnace, the soaking time corresponding to strip steel of different thicknesses is determined.

[0041] Since different thickness specifications include preset thickness specifications, the critical number of passes can be determined from the total number of passes by using the critical soaking time corresponding to the preset thickness specifications of the strip, and the critical thickness specification of the strip can be determined based on the number of critical passes. Finally, the actual temperature in the annealing furnace can be controlled based on the critical thickness specification.

[0042] 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.

[0043] First, it should be clarified that the term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0044] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the invention described herein can be implemented in sequences other than those illustrated or described herein.

[0045] Firstly, through one embodiment of the present invention, a homogenization control method is provided, which can be applied to an annealing furnace to control the homogenization process stage of the annealing furnace, reduce the time difference in homogenization treatment between strips of different specifications, and thereby improve the differences in heat treatment performance between strips of different specifications. Specifically, the annealing furnace can be a vertical annealing furnace, such as a cold-rolled vertical annealing furnace.

[0046] Please see Figure 1 As shown, the above heat equalization control method may include the following steps S101-S104:

[0047] Step S101: Based on the rated transfer speed of the annealing furnace and the soaking time threshold, determine the total length and total number of soaking passes.

[0048] Specifically, the total length of the heat exchange can be determined by multiplying the rated transmission speed by the heat exchange duration threshold.

[0049] In practice, the rated conveyor speed of the annealing furnace is generally determined by the furnace's conveyor hardware. However, it can also be controlled according to actual needs. In one implementation, the rated conveyor speed can be the furnace's maximum design speed. The soaking time threshold can be the shortest soaking time allowed during the soaking treatment stage.

[0050] In some implementations, the total length of the homogenization process can be calculated using the following formula (1):

[0051] L SF =V max ·t min (1)

[0052] Among them, L SF V is the total length for heat homogenization. max The rated conveyor speed of the annealing furnace, t min This is the threshold for the heat equalization time.

[0053] After obtaining the total length of the homogenization process, the total number of passes can be determined based on the total length of the homogenization process and the pass length of the annealing furnace.

[0054] In specific implementation, the pass length of the annealing furnace can be the pass length of the soaking process section. In some implementation methods, the total number of passes can be calculated using the following formula (2):

[0055]

[0056] Where N is the total number of homogenization passes, L SF L0 represents the total length of the homogenization process, and L0 represents the length of each pass in the annealing furnace.

[0057] Step S102: Based on the total length of the heat homogenization process and the preset performance parameters of the annealing furnace, determine the heat homogenization time corresponding to strip steel of different thicknesses.

[0058] Specifically, heat equalization includes multiple stages. In the actual implementation process, heat equalization can include: heat equalization stage 1 and heat equalization stage 2.

[0059] Regarding how to determine the soaking time for strip steel of different thicknesses based on the total soaking length and the preset performance parameters of the annealing furnace, specifically, the soaking time for strip steel of different thicknesses can be determined based on the ratio of the length of multiple soaking sections to the preset performance parameters of the annealing furnace.

[0060] The length of the first soaking stage can be determined based on the number of passes within it, specifically by multiplying the number of passes in the first soaking stage by the length of the annealing furnace passes. Similarly, the length of the second soaking stage can also be determined by multiplying the number of passes in the second soaking stage by the length of the annealing furnace passes. Alternatively, the length of the second soaking stage can be obtained by using the difference between the total length of the soaking stage and the length of the first soaking stage.

[0061] In some implementations, the length of the heat soaking section can be calculated using the following formula (3):

[0062] L SF1―i =i·L0 (3)

[0063] In the formula, L SF1―i L0 represents the length of the soaking stage 1, i represents the number of passes in the soaking stage 1, and L0 represents the pass length of the annealing furnace.

[0064] In some implementations, the length of the heat soaking section 2 can be calculated using the following formula (4):

[0065] L SF2―i =(N―i)·L0 (4)

[0066] In the formula, L SF2―i L0 is the length of the second soaking stage, i is the number of passes in the first soaking stage, L0 is the length of the annealing furnace passes, and N is the total number of passes.

[0067] After determining the lengths of the multiple homogenization stages, the homogenization time corresponding to strip steel of different thicknesses can be obtained by using the ratio of the length of the two homogenization stages to the preset performance parameters of the annealing furnace. In some embodiments, the homogenization time corresponding to strip steel of different thicknesses can be calculated using the following formula (5):

[0068] t i =60· b ·L SF2―i / TV i (5)

[0069] In the formula, t i L is the soaking time for a thickness specification of b and a number of passes of i. SF2―i The length of the two heat equalization sections, TV i This represents the TV value corresponding to the heat load output of the heating section in the i passes before homogenization.

[0070] Specifically, TV i =TV+i·TV pass Where TV is the product of the reference thickness strip and the maximum permissible process speed when processing the reference thickness strip in an annealing furnace. passThe TV value added for a single track.

[0071] In the specific implementation process, TV pass The value is related to the rated power of the radiant tubes, the calorific value of the gas, and the number of radiant tubes. In some implementations, TV pass It can be set to 10.92 mm·m / min.

[0072] In other words, for strips of the same steel grade but different specifications, the soaking heat treatment time is directly proportional to the strip thickness. Figure 2 As shown.

[0073] Since different thickness specifications include preset thickness specifications, specifically, the preset thickness specification can be the maximum strip thickness allowed by the annealing furnace.

[0074] In this way, based on the above calculation of the soaking heat treatment time corresponding to different thicknesses of strip steel, the soaking heat treatment time corresponding to the maximum thickness of strip steel can be calculated, thereby determining the critical soaking heat treatment time.

[0075] Step S103: Using the critical soaking time corresponding to the preset thickness specification of the strip, determine the critical number of passes from the total number of passes, and determine the critical thickness specification of the strip based on the critical number of passes.

[0076] Specifically, the number of critical passes can be determined by judging whether the critical soaking time is greater than the soaking time threshold. If the critical soaking time is determined to be greater than the soaking time threshold, the number of passes corresponding to the critical soaking time is matched from the total number of passes to determine the number of critical passes.

[0077] Based on step S102, the critical soaking time can be calculated. That is, as long as the critical soaking time satisfies the following inequality (6), the number of passes corresponding to the critical soaking time can be determined as the number of critical passes.

[0078] t i―max >t min (6)

[0079] In the inequality, t i―max For thickness specification b max The critical soaking time when the number of passes is i, and t i―max =60·b max ·L SF2―i / TV i Among them, b max Given the preset thickness specification of the strip steel, if the critical number of passes is k, then k = i.

[0080] Next, the critical thickness specification of the strip can be determined based on the number of critical passes. Specifically, the critical thickness specification of the strip can be determined based on the soaking time threshold, the preset performance parameters of the annealing furnace, the number of critical passes, and the total number of passes.

[0081] In practice, the critical thickness specification of the strip can be obtained by multiplying the soaking time threshold with the preset performance parameters of the annealing furnace, the pass length of the annealing furnace, and the difference between the total number of passes and the critical number of passes.

[0082] In some implementations, the critical thickness specification of the strip can be calculated using the following formula (7):

[0083] b k =TV i ·t min / 60·( N — k )·L0 (7)

[0084] In the formula, b k TV is the critical thickness specification for strip steel. i t represents the TV value corresponding to the heat load output of the heating section in the i passes before homogenization. min Where N is the threshold for soaking time, k is the total number of passes, and L0 is the pass length of the annealing furnace.

[0085] Step S104: Control the actual temperature in the annealing furnace based on the critical thickness specification.

[0086] Specifically, if the current strip thickness is greater than or equal to the critical thickness specification, the first heat soaking stage is controlled to heat the current strip. Otherwise, the first heat soaking stage is controlled to keep the current strip at a constant temperature.

[0087] In the specific implementation process, such as Figure 3 As shown, a radiation pyrometer P2 can be added at a specific location in the heat exchange section, thereby dividing the heat exchange section into two parts: heat exchange section 1 and heat exchange section 2. Additionally, heating equipment can be installed in heat exchange section 1 to enable it to raise its temperature.

[0088] For example, if an annealing furnace can heat treat strip steel with a thickness range of 0.4 to 2.5 mm, the total soaking length of the annealing furnace is 150 m, the TV value of the annealing furnace is 100 mm·m / min (reference thickness is 1.0 mm, annealing temperature is 760℃), and the soaking time threshold is 60 s.

[0089] So, when the annealing temperature of the strip is 760℃, what is the soaking heat treatment time for strips of different thicknesses and specifications? Figure 4As shown, it can be seen that as the thickness of the strip increases, the corresponding soaking heat treatment time is controlled within 60s to 100s.

[0090] In comparison, such as Figure 5 As shown, the existing technology involves setting a pyrometer at the outlet of each zone of the annealing furnace. P1 is installed at the outlet of the heating section upstream of the soaking section, and P1 is used to control the heat load output of the heating section. P3 is installed at the outlet of the soaking section to control the heat load output of the soaking section. However, since the transmission speed of thin strip steel is greater than that of thick strip steel, the soaking treatment time of strip steel of different specifications of the same steel grade is inconsistent.

[0091] For example, if an annealing furnace can heat treat strip steel with a thickness range of 0.4 to 2.5 mm, the total heat treatment length of the annealing furnace is 150 m, the TV value of the annealing furnace is 100 mm·m / min (reference thickness is 1.0 mm, annealing temperature is 760℃), and the heat treatment time threshold is 60 s.

[0092] When the annealing temperature of the strip steel is 760℃, the soaking heat treatment time for strip steel of different thicknesses is as follows: Figure 6 As shown, it can be seen that as the thickness of the strip increases, the corresponding soaking time gradually increases from 60s to 150s.

[0093] In summary, compared with the existing heat homogenization control methods of annealing furnaces, when performing heat homogenization on strips of the same steel grade but different thicknesses, the embodiments of the present invention can effectively reduce the difference in heat homogenization time. Based on the data listed above, the maximum difference in heat homogenization time in the prior art is 90s, while in the implementation of the present invention, the maximum difference in heat homogenization time is only 40s.

[0094] To better determine the installation location of the pyrometer, specifically, the installation location of the pyrometer in the annealing furnace can be determined by using the number of critical passes.

[0095] In the specific implementation process, the location of the pyrometer can be determined by the number of critical passes corresponding to the outlet position.

[0096] Continuing with the example of an annealing furnace capable of heat-treating strip steel with a thickness range of 0.4–2.5 mm, a single-pass length of 20 m, a TV value of 100 mm·m / min (reference thickness 1.0, annealing temperature 760 °C), and a soaking time threshold of 60 s, the implementation of this invention will be illustrated as follows:

[0097] According to step S101 above, the total length of the homogenization process is 100m, and the total number of passes is 5. Next, the homogenization process is divided into two sections: homogenization section 1 and homogenization section 2. The lengths of homogenization section 2 are selected as 100m, 80m, 60m, 40m, and 20m respectively. Based on step S102 above, the homogenization treatment times for strips of the same steel grade but different thicknesses are shown in Table 1 below.

[0098] Table 1. Soaking time for strips of different thicknesses with different soaking section lengths

[0099]

[0100]

[0101] In Table 1, the lengths of the two heat-spreading sections that meet the above inequality (6) are 80m and 60m; and according to the above formula (7), we know that:

[0102] 1. When the critical pass is 4, the critical thickness specification for the strip is 1.39mm. That is, when the strip thickness is ≥1.39mm, such as... Figure 7 As shown, radiation pyrometer P2 is used for heat load output control of the heating section; when the strip thickness is <1.39mm, radiation pyrometer P1 is used for heat load output control of the heating section.

[0103] Under this heat equalization control method, the corresponding result is, for example, Figure 8 As shown, the maximum difference in heat treatment time between strips of different thicknesses is 48 seconds.

[0104] For example, if the rated power of the radiant tube is 120kW and the calorific value of the gas is 17038.8kJ / m³ 3 The current strip steel specification is 1.0×1250mm. The temperature of this strip steel needs to be raised from 150℃ to 760℃, with a gas consumption of approximately 47.31m³ per ton of steel. 3 / T.

[0105] When the critical number of passes is 4, the addition of 2 passes is equivalent to adding 24 radiant tubes. Using the heat homogenization control method provided by this invention, when heat treating thick strip steel, it is equivalent to saving an additional 608.49m while achieving the same heat treatment effect. 3 Gas consumption; if the gas consumption is not changed, the production capacity can be increased by 12.86T / h, which is equivalent to an increase of 21.85% in the TV value of the annealing furnace.

[0106] II. When the critical pass number is 3, the critical thickness specification for the strip is 2.05mm. That is, when the strip thickness is ≥2.05mm, such as... Figure 9As shown, radiation pyrometer P2 is used for heat load output control of the heating section; when the strip width is <2.05mm, radiation pyrometer P1 is used for heat load output control of the heating section.

[0107] Under this heat equalization control method, the corresponding result is, for example, Figure 10 As shown, the maximum difference in heat treatment time between strips of different thicknesses is 60 seconds.

[0108] Continuing with a radiant tube rated power of 120kW and a gas calorific value of 17038.8kJ / m³, 3 The current strip steel specification is 1.0×1250mm. The temperature of this strip steel needs to be raised from 150℃ to 760℃, with a gas consumption of approximately 47.31m³ per ton of steel. 3 For example, / T.

[0109] When the critical number of passes is 3, since the addition of 3 passes is equivalent to adding 36 radiant tubes, using the heat homogenization control method provided by this invention, when heat treating thick strip steel, it is equivalent to saving an additional 912.73m while achieving the same heat treatment effect. 3 Gas consumption. Without changing the gas consumption, the production capacity can be increased by 19.29 T / h, which is equivalent to an increase of 32.77% in the TV value of the annealing furnace.

[0110] III. Based on the first and second scenarios above, two pyrometers can be installed in the middle of the heat exchange section, as shown in the specific arrangement below. Figure 11 As shown, by setting up the pyrometer in this way and following the above-described heat homogenization control method, the difference in heat homogenization time between strips of different thicknesses can be further reduced, such as... Figure 12 As shown, the maximum difference can be controlled within 26 seconds.

[0111] Secondly, through one embodiment of the present invention, a homogenization control device is provided, which can be applied to an annealing furnace to control the homogenization process stage of the annealing furnace, reduce the time difference in homogenization treatment between strips of different specifications, and thereby improve the differences in heat treatment performance between strips of different specifications. Specifically, the annealing furnace can be a vertical annealing furnace, such as a cold-rolled vertical annealing furnace.

[0112] Please see Figure 13 As shown, the device may include:

[0113] The first calculation unit 201 is used to determine the total length and total number of heat treatments based on the rated transmission speed of the annealing furnace and the heat treatment duration threshold.

[0114] The second calculation unit 202 is used to determine the soaking time corresponding to strip steel of different thicknesses based on the total length of the soaking and the preset performance parameters of the annealing furnace, wherein the different thicknesses include preset thicknesses.

[0115] The critical condition determination unit 203 is used to determine the number of critical passes from the total number of passes by using the critical soaking time corresponding to the preset thickness specification strip steel, and to determine the critical thickness specification of the strip steel based on the number of critical passes.

[0116] Temperature control unit 204 is used to control the actual temperature in the annealing furnace based on the critical thickness specification.

[0117] As an optional implementation, the first computing unit 201 is specifically used for:

[0118] The total length of the heat soaking is determined by multiplying the rated transmission speed by the heat soaking time threshold; the total number of passes is determined by the total length of the heat soaking and the pass length of the annealing furnace.

[0119] As an optional implementation, the heat equalization includes multiple sections, and the second calculation unit 202 is specifically used for:

[0120] Based on the ratio of the length of the multi-stage heat homogenization to the preset performance parameters of the annealing furnace, the heat homogenization time corresponding to strip steel of different thicknesses is determined.

[0121] As an optional implementation, the critical condition determination unit 203 includes:

[0122] The judgment sub-unit is used to determine whether the critical soaking time is greater than the soaking time threshold; if so, the number of passes corresponding to the critical soaking time is matched from the total number of passes to determine the critical number of passes.

[0123] The critical thickness specification determination subunit is used to determine the critical thickness specification of the strip steel based on the soaking time threshold, the preset performance parameters of the annealing furnace, the number of critical passes, and the total number of passes.

[0124] As an optional implementation, the heat dissipation control device further includes:

[0125] The pyrometer location determination unit is used to determine the installation location of the pyrometer in the annealing furnace by utilizing the number of critical passes.

[0126] Since the heat dissipation control device described in this embodiment is an electronic device used to implement the heat dissipation control method in this embodiment of the invention, those skilled in the art can understand the specific implementation methods and various variations of the electronic device in this embodiment based on the heat dissipation control method described in this embodiment of the invention. Therefore, how the electronic device implements the method in this embodiment of the invention will not be described in detail here. Any electronic device used by those skilled in the art to implement the heat dissipation control method in this embodiment of the invention falls within the scope of protection of this invention.

[0127] Thirdly, based on the same inventive concept, embodiments of the present invention provide a homogenization control device that can be applied to an annealing furnace to control the homogenization process stage of the annealing furnace, reduce the time difference in homogenization treatment between strips of different specifications, and thereby improve the differences in heat treatment performance between strips of different specifications. Specifically, the annealing furnace can be a vertical annealing furnace, such as a cold-rolled vertical annealing furnace.

[0128] refer to Figure 14 As shown, the heat dissipation control device provided in this embodiment of the invention includes: a memory 301, a processor 302, and code stored in the memory and executable on the processor 302. When the processor 302 executes the code, it implements any of the embodiments of the heat dissipation control method described above.

[0129] Among them, Figure 14 In this document, a bus architecture (represented by bus 300) is used. Bus 300 may include any number of interconnected buses and bridges, linking various circuits including one or more processors represented by processor 302 and memory represented by memory 301. Bus 300 may also link various other circuits such as peripheral devices, voltage regulators, and power management circuits, which are well known in the art and therefore will not be described further herein. Bus interface 303 provides an interface between bus 300 and receiver 303 and transmitter 304. Receiver 303 and transmitter 304 may be the same element, i.e., a transceiver, providing a unit for communicating with various other devices over a transmission medium. Processor 302 is responsible for managing bus 300 and general processing, while memory 301 can be used to store data used by processor 302 during operation.

[0130] Fourthly, through one embodiment of the present invention, an annealing process apparatus is provided, including the heat homogenization control device described in the third aspect, and an annealing furnace electrically connected to the heat homogenization control device. The heat homogenization control device controls the actual temperature of the annealing furnace based on the aforementioned heat homogenization control method.

[0131] Fifthly, such as Figure 15As shown, based on the same inventive concept, the present invention provides a computer-readable storage medium 400 through an embodiment of the present invention, on which a computer program 401 is stored, which, when executed by a processor, implements any of the embodiments of the heat dissipation control method described above.

[0132] The technical solutions in the above embodiments of the present invention have at least the following technical effects or advantages:

[0133] The embodiments of the present invention can control the actual temperature in the annealing furnace based on the critical thickness specification, so as to implement different temperature control for strip steel of different thickness specifications, thereby reducing the difference in the heat treatment time between strip steel of different thickness specifications and reducing the heat treatment performance of strip steel of different thickness specifications.

[0134] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer 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 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 code.

[0135] This invention is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer 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 instructions. These computer 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 device that provides the functions specified in one or more boxes.

[0136] These computer 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 means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0137] These computer 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.

[0138] 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 both the preferred embodiments and all changes and modifications falling within the scope of the invention.

[0139] 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 soak control method, characterized by, The application is applied to an annealing furnace, the annealing furnace comprises a soaking section, a radiation pyrometer is added at a specific position of the soaking section, the soaking section is divided into two sections, namely, a soaking 1 section and a soaking 2 section, the soaking 1 section is provided with a heating device, and the method comprises the following steps: Based on the rated conveying speed of the annealing furnace and a soaking time threshold, the total length of soaking and the total pass quantity are determined; the soaking time threshold is the shortest soaking time allowed in the soaking treatment stage; Based on the total length of soaking and preset performance parameters of the annealing furnace, the soaking treatment time corresponding to different thickness specifications of strip steel is determined, wherein the different thickness specifications include preset thickness specifications; By using the critical soaking treatment time corresponding to the preset thickness specification of strip steel, the critical pass quantity is determined from the total pass quantity, and the critical thickness specification of the strip steel is determined based on the critical pass quantity; Based on the critical thickness specification, the actual temperature in the annealing furnace is controlled; The control of the actual temperature in the annealing furnace based on the critical thickness specification comprises the following steps: If the thickness of the current strip steel is greater than or equal to the critical thickness specification, the soaking 1 section is controlled to heat the current strip steel; otherwise, the soaking 1 section is controlled to keep the current strip steel warm; The determination of the soaking treatment time corresponding to different thickness specifications of strip steel based on the total length of soaking and preset performance parameters of the annealing furnace comprises the following steps: The soaking treatment time corresponding to different thickness specifications of strip steel is calculated by using the following formula: wherein, is the soaking length for a thickness specification b and a number of passes i, is the length of the soaking 2 section, wherein TV is the product of a reference thickness strip and the maximum process speed allowed for processing the reference thickness strip in the annealing furnace, is the TV value added for a single pass; the length of the soaking 2 section is the difference between the total length of the soaking and the length of the soaking 1 section, the length of the soaking 1 section being the product of the number of passes of the soaking 1 section and the length of a pass of the annealing furnace; The determination of the critical pass quantity from the total pass quantity by using the critical soaking treatment time corresponding to the preset thickness specification of strip steel comprises the following steps: It is judged whether the critical soaking treatment time corresponding to the preset thickness specification of strip steel is greater than the soaking time threshold; If yes, the pass quantity corresponding to the critical soaking treatment time is matched from the total pass quantity to determine the critical pass quantity; The determination of the critical thickness specification of the strip steel based on the critical pass quantity comprises the following steps: The critical thickness specification of the strip steel is calculated by using the following formula: In the formula, is a critical thickness specification of the strip steel, is a soaking time threshold, is the total pass number, and k is the critical pass number, is a pass length of the annealing furnace.

2. The method of claim 1, wherein, The determination of the total length of soaking and the total pass quantity based on the rated conveying speed of the annealing furnace and a soaking time threshold comprises the following steps: The total length of soaking is determined based on the product of the rated conveying speed and the soaking time threshold; The total pass quantity is determined based on the total length of soaking and the pass length of the annealing furnace.

3. The method of claim 1, wherein, Further comprising: The installation position of the pyrometer in the annealing furnace is determined by using the critical pass quantity.

4. A soak control device, characterized by, The application is applied to an annealing furnace, and the device comprises: A first calculation unit is configured to determine the total length of soaking and the total pass quantity based on the rated conveying speed of the annealing furnace and a soaking time threshold; the soaking time threshold is the shortest soaking time allowed in the soaking treatment stage; A second calculation unit is configured to determine the soaking treatment time corresponding to different thickness specifications of strip steel based on the total length of soaking and preset performance parameters of the annealing furnace, wherein the different thickness specifications include preset thickness specifications; The critical condition determining unit is configured to determine a critical pass number from the total pass number according to a critical soaking treatment time corresponding to the preset thickness specification of the strip steel, and determine a critical thickness specification of the strip steel based on the critical pass number. The temperature control unit is configured to control an actual temperature in the annealing furnace based on the critical thickness specification. The controlling the actual temperature in the annealing furnace based on the critical thickness specification comprises: If the thickness of the current strip steel is greater than or equal to the critical thickness specification, the first soaking section is controlled to heat the current strip steel; otherwise, the first soaking section is controlled to keep the current strip steel warm. The determining the soaking treatment time corresponding to the strip steel of different thickness specifications based on the total length of the soaking and the preset performance parameters of the annealing furnace comprises: The soaking treatment time corresponding to the strip steel of different thickness specifications is calculated by using the following formula: wherein, is the soaking length for a thickness specification b and a number of passes i, is the length of the soaking 2 section, wherein TV is the product of a reference thickness strip and the maximum process speed allowed for processing the reference thickness strip in the annealing furnace, is the TV value added for a single pass; the length of the soaking 2 section is the difference between the total length of the soaking and the length of the soaking 1 section, the length of the soaking 1 section being the product of the number of passes of the soaking 1 section and the length of a pass of the annealing furnace; The determining the critical pass number from the total pass number according to the critical soaking treatment time corresponding to the preset thickness specification of the strip steel comprises: Determining whether the critical soaking treatment time corresponding to the preset thickness specification of the strip steel is greater than the soaking time threshold; If yes, a pass number corresponding to the critical soaking treatment time is matched from the total pass number to determine the critical pass number. The determining the critical thickness specification of the strip steel based on the critical pass number comprises: The critical thickness specification of the strip steel is calculated by using the following formula: In the formula, is a critical thickness specification of the strip steel, is a soaking time threshold, is the total pass number, and k is the critical pass number, is a pass length of the annealing furnace.

5. A soak control apparatus comprising a memory, a processor, and a computer program stored on the memory and executable on the processor, wherein the computer program comprises instructions for: receiving a request to initiate a soak operation; determining a soak temperature; determining a soak time; determining a soak temperature ramp rate; determining a soak time ramp rate; and initiating the soak operation. The processor executes the program to implement the method in any one of claims 1-3.

6. An annealing process apparatus characterized by comprising: The soaking control device comprises the soaking control device according to claim 5, and the annealing furnace electrically connected with the soaking control device.

7. A computer-readable storage medium having stored thereon a computer program, characterized in that, The program is executed by the processor to implement the method in any one of claims 1-3. The program is executed by the processor to implement the method in any one of claims 1-3.

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