A low-carbon one-time annealing process

Abstract

This invention discloses a low-carbon content single-stage annealing process, specifically relating to the field of steel strip. It includes four sets of support legs, with two sets of working plate assemblies fixedly installed between them. A receiving cavity is provided between the two sets of working plate assemblies, and a moving component is slidably installed inside the receiving cavity. A spraying component is connected to the side wall of each working plate assembly, and a water supply component is connected to one side of each working plate assembly. A driving component is slidably installed on the side wall of each working plate assembly, and the driving component and the moving component are in a meshing transmission state. Each working plate assembly includes a working plate body, which is divided into four regions along the horizontal axis of the working plate assembly. This invention sprays pickling liquid onto the surface of the steel strip and adsorbs excess pickling liquid from the steel strip surface through vacuum adsorption, resulting in uniform distribution of pickling liquid on the secondary steel strip surface, saving raw materials. Excess cleaning liquid on the steel strip surface can be recycled.

Description

Technical Field

[0001] This invention relates to the field of steel strip technology, and more specifically, to a low-carbon one-time annealing process. Background Technology

[0002] Before steel products undergo various processing techniques, such as electroplating (including tin plating and zinc plating), hot-dip galvanizing (including hot-dip galvanizing), color-coated steel sheet processing (for example, Tangshan Iron and Steel Company's continuous color-coating production process includes a continuous pickling production line), painting, enamel coating, stamping, etc., pickling is required to remove iron oxide scale, dirt, oil stains, etc. from the surface of the metal products. Otherwise, the quality of the steel products will be affected.

[0003] To form a good base layer during high-temperature annealing, pickling is necessary after annealing. Since the dissolution rate of metallic iron is much higher than that of other oxides, mechanical stripping plays a significant role in the pickling process. However, excessive reaction can lead to excessive loss of acid and base iron, and hydrogen embrittlement caused by hydrogen diffusion into the base iron can result in uneven pickling of the steel, altering its physical properties. Therefore, controlling the pickling time is also crucial. Summary of the Invention

[0004] To overcome the aforementioned deficiencies of the prior art, embodiments of the present invention provide a low-carbon content primary annealing process. This process involves spraying pickling solution onto the surface of a steel strip and then using vacuum adsorption to adsorb excess pickling solution from the steel strip surface. This results in a uniform distribution of pickling solution across the secondary steel strip surface, saving raw materials. Furthermore, excess cleaning solution on the steel strip surface can be recycled, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a low-carbon content single-stage annealing process, comprising the following steps:

[0006] S1: Raw materials containing iron ore and coal are put into a converter for smelting and vacuum treatment to obtain steel strip with the target composition. The target composition contains Fe, which is an impurity. The obtained steel strip is rolled and continuously cast, and then hot rolled into coils by a hot rolling mill.

[0007] S2: After removing the strapping from the steel strip coil raw material obtained in step S1, place it on the storage platform, send it to the steel strip coil preparation station via the coil loading trolley, send it to the uncoiler for uncoiling, send it to the acidification equipment for HCl pickling treatment, and then dry it.

[0008] S3: The steel strip after S2 is pickled with HCl is sent to a 20-roll Sendzimir mill for rolling. The steel strip coil rolled by the 20-roll Sendzimir mill is then put into a continuous furnace for decarburization annealing to complete the primary crystallization.

[0009] S4: After the steel strip obtained in S3 is rolled a second time, the steel strip is restored and annealed, and the temperature is increased, followed by high-temperature stretching annealing and coating on the surface of the steel strip. The finished product is then finished and coiled, and the process is completed.

[0010] The acidification equipment includes four sets of support legs, two sets of working plate assemblies are fixedly installed between the four sets of support legs, a receiving cavity is provided between the two sets of working plate assemblies, a moving component is slidably installed inside the receiving cavity, a spraying component is connected to the side wall of each set of working plate assemblies, a water supply component is connected to one side of each set of working plate assemblies, and a driving component is slidably installed on the side wall of each working plate assembly. The driving component and the moving component are set in a meshing transmission state.

[0011] The working plate assembly includes a working plate body, which is divided into four regions along the horizontal axis of the working plate assembly. The four regions are spraying zone F1, adsorption zone F2, reaction zone F3, and treatment zone F4. A water cavity is vertically formed in the spraying zone F1 of the working plate body. A vertical mounting groove is formed on the side wall of the water cavity of the working plate body. Multiple pressurizing nozzles are inserted into the vertical mounting groove of the working plate assembly. The multiple pressurizing nozzles are connected to the water delivery assembly through the working plate assembly.

[0012] The working plate body has a vertically formed vacuum chamber in the adsorption zone F2 area, and the working plate body has multiple flow guide holes on the side wall of the vacuum chamber.

[0013] In a preferred embodiment, the water delivery assembly includes a water delivery pipe that is connected in communication with the outer wall of the working plate body, and a vacuum negative pressure pump is fixedly connected to the bottom end of the water delivery pipe. The input end of the vacuum negative pressure pump is connected to a water tank.

[0014] In a preferred embodiment, the spraying assembly includes a U-shaped pipe fixedly installed on the outer wall of the working plate body, one end of the U-shaped pipe is connected to a miniature negative pressure pump, and the bottom end of the miniature negative pressure pump has an output hole.

[0015] In a preferred embodiment, the working plate body has an inclined groove at the bottom of the adsorption zone F2, and the bottom of the inclined groove has multiple sets of water passage holes. The working plate assembly has a guide plate fixedly installed on the side wall of the inclined groove.

[0016] In a preferred embodiment, the movable component includes a sliding base, a horizontal connecting plate is fixedly connected to one side of the sliding base, a vertical rack is fixedly installed at the top of the horizontal connecting plate, a square through slot is vertically formed inside the horizontal connecting plate, a ball bearing is rotatably installed at the top of the sliding base, and an insert component is slidably mounted inside the sliding base of the movable component.

[0017] In a preferred embodiment, a set of wire holes runs through the interior of the sliding base, and the insertion assembly includes multiple sets of locking plates that engage inside the sliding base. Two sets of vertical insert plates are vertically inserted into the top of each set of locking plates. A set of rigid ropes is inserted inside the locking plates, and multiple small steel balls are fixedly installed on the outer surface of each set of rigid ropes, with both ends of the rigid ropes extending outwards.

[0018] In a preferred embodiment, the drive assembly includes a motor base fixedly mounted on one end of the work plate body, a stepper motor mounted on the top of the motor base, a rack fixedly connected to the output shaft end of the stepper motor, a transmission gear meshing on the surface of the rack, the transmission gear being rotatably mounted on the surface of the work plate body, and the rack being horizontally slidably mounted on the surface of the work plate body.

[0019] In a preferred embodiment, a positioning component is fixedly installed at the top of the work plate assembly. The positioning component includes four sets of vertically inserted columns at the top of the work plate body. A horizontal mounting plate is fixedly installed at the top of the columns. Multiple infrared rangefinders are fixedly installed on the side of the horizontal mounting plate facing the work plate body.

[0020] In a preferred embodiment, the work plate body has an arc-shaped placement groove in the processing area F4. The work plate assembly has a stripping component vertically inserted inside the arc-shaped placement groove. The stripping component includes a positioning rod vertically inserted inside the work plate body. An adapter sleeve is rotatably mounted on the surface of the positioning rod. The surface of the adapter sleeve extends out of the arc-shaped placement groove toward the receiving cavity, and multiple bristles are fixedly mounted on the outer surface of the adapter sleeve.

[0021] The technical effects and advantages of this invention are as follows:

[0022] 1. This invention sprays pickling solution onto the surface of a steel strip and uses vacuum adsorption to adsorb excess pickling solution from the steel strip surface, thereby ensuring that the pickling solution is evenly distributed on the secondary steel strip surface, saving raw materials. Excess cleaning solution on the steel strip surface can be recycled and reused.

[0023] 2. The present invention drives the steel to slide in the receiving cavity by the moving component, which in turn drives the stripping component to rotate. This causes the bristles on the surface of the stripping component to sweep away the oxide film on the surface of the acid-treated steel strip, eliminating the need for manual stripping and saving manpower. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the pickling equipment of the present invention.

[0025] Figure 2 For the present invention Figure 1 Enlarged view of the structure of part A, structural schematic diagram.

[0026] Figure 3 This is a schematic diagram of the overall structure of the drive component of the present invention.

[0027] Figure 4 For the present invention Figure 1 Enlarged view of the structure of part B.

[0028] Figure 5 This is a schematic diagram of the overall structure of the working board assembly of the present invention.

[0029] Figure 6 For the present invention Figure 1 Enlarged view of the C-section structure.

[0030] Figure 7 This is a partial cross-sectional view of the overall structure of the working board assembly of the present invention.

[0031] Figure 8 This is a partial cross-sectional view of the overall structure of the stripping component of the present invention.

[0032] Figure 9 This is a schematic diagram of the overall structure of the mobile component of the present invention.

[0033] Figure 10 This is a breakdown diagram of the overall structure of the insertion assembly and the moving assembly of the present invention.

[0034] The attached figures are labeled as follows: 1. Support leg; 2. Working plate assembly; 201. Working plate body; 202. Water chamber; 203. Vacuum chamber; 204. Vertical mounting slot; 205. Inclined slot; 206. Guide hole; 207. Arc-shaped mounting slot; 208. Water passage hole; 3. Positioning assembly; 301. Column; 302. Horizontal mounting plate; 303. Infrared rangefinder; 4. Spraying assembly; 401. U-shaped pipe; 402. Miniature negative pressure pump; 403. Output hole; 5. Water delivery assembly; 501. Water tank; 502. Vacuum negative pressure pump; 503. Water delivery pipe; 6. Drive. Components; 601, Motor base; 602, Stepper motor; 603, Straight rack; 604, Transmission gear; 7, Pressure nozzle; 8, Guide plate; 9, Stripping assembly; 901, Positioning rod; 902, Adapter sleeve; 903, Brush bristles; 10, Moving assembly; 1001, Sliding base; 1002, Horizontal connecting plate; 1003, Vertical rack; 1004, Square through slot; 1005, Ball bearing; 1006, Wire hole; 11, Insertion assembly; 1101, Clamping plate; 1102, Vertical insert plate; 1103, Rigid rope; 1104, Small steel ball. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Refer to the instruction manual appendix Figure 1-10 Example 1: A low-carbon content single-stage annealing process, comprising the following steps:

[0037] S1: Raw materials containing iron ore and coal are put into a converter for smelting and vacuum treatment to obtain steel strip with the target composition. The target composition contains Fe, which is an impurity. The obtained steel strip is rolled and continuously cast, and then hot rolled into coils by a hot rolling mill.

[0038] S2: After removing the strapping from the steel strip coil raw material obtained in step S1, place it on the storage platform and send it to the steel strip coil preparation station (ground roller and shovel guide plate---nine-roll straight head machine---head cutter, corner cutter) via the coil loading trolley. Then send it to the uncoiler for uncoiling, send it to the acidification equipment for HCl pickling treatment, and then dry it.

[0039] S3: The steel strip after S2 is pickled with HCl is sent to a 20-roll Sendzimir mill for rolling. The steel strip coil rolled by the 20-roll Sendzimir mill is then put into a continuous furnace for decarburization annealing to complete the primary crystallization.

[0040] S4: After the steel strip obtained in S3 is rolled a second time, the steel strip is restored and annealed, and the temperature is increased, followed by high-temperature stretching annealing and coating on the surface of the steel strip. The finished product is then finished and coiled, and the process is completed.

[0041] The acidification equipment includes four sets of support legs 1, such as Figure 1 As shown, two sets of working plate assemblies 2 are fixedly installed between the four sets of support legs 1. A receiving cavity is provided between the two sets of working plate assemblies 2. A moving assembly 10 is slidably installed inside the receiving cavity. A spraying assembly 4 is connected to the side wall of each set of working plate assemblies 2. A water supply assembly 5 is connected to one side of each set of working plate assemblies 2. A driving assembly 6 is slidably installed on the side wall of the working plate assemblies 2. The driving assembly 6 and the moving assembly 10 are set in a meshing transmission state. There are two sets of water supply assembly 5 and two sets of spraying assembly 4. The spraying assembly 4 and water supply assembly 5 located on the same side as the driving assembly 6 need to be higher than the spraying assembly 4 and water supply assembly 5 on the surface of the other end of the working plate assemblies 2 to prevent the installation of the spraying assembly 4 and water supply assembly 5 from obstructing the operation of the driving assembly 6. For the convenience of showing the position of the driving assembly 6 in the figure, the two sets of water supply assembly 5 and the two sets of spraying assembly 4 are not shown in the figure.

[0042] like Figure 3 As shown, the working plate assembly 2 includes a working plate body 201. The working plate body 201 is divided into four regions along the horizontal axis of the working plate assembly 2. The four regions are the spraying zone F1, the adsorption zone F2, the reaction zone F3, and the treatment zone F4. A water cavity 202 is vertically opened in the spraying zone F1 of the working plate body 201. A vertical mounting groove 204 is opened on the side wall of the water cavity 202 of the working plate body 201. Multiple pressurizing nozzles 7 are inserted into the vertical mounting groove 204 of the working plate assembly 2. The multiple pressurizing nozzles 7 are connected to the water delivery assembly 5 through the working plate assembly 2.

[0043] like Figure 3 As shown, a vacuum chamber 203 is vertically provided in the adsorption zone F2 of the working plate body 201. Multiple guide holes 206 are provided on the side wall of the vacuum chamber 203 of the working plate body 201. The receiving chamber is connected to the spraying assembly 4 through the working plate assembly 2.

[0044] Furthermore, such as Figure 5 As shown, the water supply assembly 5 includes a water supply pipe 503 that is connected to the outer wall of the working plate body 201. A vacuum negative pressure pump 502 is fixedly connected to the bottom end of the water supply pipe 503, and a water tank 501 is connected to the input end of the vacuum negative pressure pump 502.

[0045] The vacuum negative pressure pump 502, model HLVP15, is used to pressurize and introduce water from inside the water tank 501 into the water chamber 202 of the working plate body 201. The water is then sprayed out through the pressurized nozzle 7, uniformly spraying the steel strip onto the surface of the steel strip in the spraying area F1 for pickling. Compared to the traditional immersion method where the steel strip is completely soaked in pickling solution, this method avoids excessive pickling solution on the surface of the steel strip, saving materials. It also prevents the concentration of pickling solution in the immersion solution from decreasing, which could lead to inconsistent pickling reaction times and incomplete pickling reaction.

[0046] Furthermore, such as Figure 6 As shown, the spraying assembly 4 includes a U-shaped pipe 401 fixedly installed on the outer wall of the working plate body 201. One end of the U-shaped pipe 401 is connected to a micro negative pressure pump 402, and the bottom end of the micro negative pressure pump 402 is provided with an output hole 403.

[0047] When the steel strip passes through the spray zone F1, the micro negative pressure pump 402, model HLVP15, absorbs excess pickling liquid from the steel strip and enters the vacuum chamber 203 through the guide hole 206. It then enters the interior of the spray assembly 4 and is discharged through the output hole 403. The excess pickling liquid is collected and can be remixed for reuse.

[0048] like Figure 7 As shown, the working plate body 201 has an inclined groove 205 at the bottom of the adsorption zone F2. Multiple sets of water passage holes 208 pass through the bottom of the inclined groove 205. The working plate assembly 2 has a guide plate 8 fixedly installed on the side wall of the inclined groove 205.

[0049] When excess pickling liquid on the surface of the steel strip is vacuum-adsorbed to the surface wall of the working plate body 201 by the action of the micro negative pressure pump 402, some of the pickling liquid particles enter the interior of the guide hole 206 and are then discharged, while the rest accumulates on the surface wall of the working plate body 201 and slides down through the guide plate 8 to the interior of the inclined groove 205, and is discharged through the water passage 208 and then collected, which can be remixed and reused.

[0050] like Figure 9As shown, the moving component 10 includes a sliding base 1001. A horizontal connecting plate 1002 is fixedly connected to one side of the sliding base 1001. A vertical rack 1003 is fixedly installed at the top of the horizontal connecting plate 1002. A square through groove 1004 is vertically opened inside the horizontal connecting plate 1002. The square through groove 1004 facilitates the collection and reuse of excess pickling solution. A ball bearing 1005 is rotatably installed at the top of the sliding base 1001. The ball bearing 1005 facilitates the moving component 10 to drive the steel strip plate to slide. An insert component 11 is slidably installed inside the sliding base 1001 of the moving component 10.

[0051] like Figure 10 As shown, a set of wire holes 1006 runs through the interior of the sliding base 1001. The insertion assembly 11 includes multiple sets of locking plates 1101 that engage with the interior of the sliding base 1001. Two sets of vertical insert plates 1102 are vertically inserted into the top of each set of locking plates 1101. The horizontal distance between the two sets of horizontal connecting plates 1002 is the thickness of the steel strip plate. A set of rigid ropes 1103 is inserted inside the locking plates 1101. Multiple small steel balls 1104 are fixedly installed on the outer surface of the set of rigid ropes 1103, and the two ends of the rigid ropes 1103 extend outward through 1106. One set of rigid ropes 1103 has multiple small steel balls 1104 fixedly installed on its outer surface at equal intervals, and a set of small steel balls 1104 are interspersed between adjacent sliding bases 1001. When the steel strip plate is vertically inserted into a set of clamping plates 1101 and pushed along the horizontal axis of the moving component 10, multiple clamping plates 1101 are stacked together. Simultaneously, the steel strip plate is inserted into the interior of multiple clamping plates 1101, abutting against one end of the steel strip plate. The rigid ropes 1103 are pulled in, causing the small steel balls 1104 to abut against the clamping plates 1101, and multiple sets of clamping plates 1101 move laterally, thus arranging them at equal intervals inside the sliding base 1001. Moving the moving component 10 causes the steel strip plate to slide inside the receiving cavity.

[0052] like Figure 2 As shown, the drive assembly 6 includes a motor base 601 fixedly mounted on one end of the work plate body 201. A stepper motor 602 is mounted on the top of the motor base 601. The stepper motor 602 is model PH533HG1-NA. A rack 603 is fixedly connected to the end of the output shaft of the stepper motor 602. A transmission gear 604 meshes with the surface of the rack 603. The transmission gear 604 is rotatably mounted on the surface of the work plate body 201. The rack 603 is horizontally slidably mounted on the surface of the work plate body 201.

[0053] The straight rack 603 is meshed with the vertical rack 1003 via the transmission gear 604. The stepper motor 602, the micro negative pressure pump 402, and the vacuum negative pressure pump 502 are all controlled by a PLC. The micro negative pressure pump 402 controls the movement speed and dwell time of the moving component 10, as well as the opening and closing of the micro negative pressure pump 402 and the vacuum negative pressure pump 502. The reaction zone F3 is the reaction dwell area of ​​the pickling solution for the steel strip.

[0054] like Figure 3 As shown, a positioning component 3 is fixedly installed at the top of the work plate assembly 2. The positioning component 3 includes four sets of vertical columns 301 inserted into the top of the work plate body 201. A horizontal mounting plate 302 is fixedly installed at the top of the column 301. Multiple infrared rangefinders 303 are fixedly installed on the side of the horizontal mounting plate 302 facing the work plate body 201.

[0055] The infrared rangefinder 303 is model ATYY-PRO1500. The infrared rangefinder 303 uses infrared positioning function to locate and lock the position of the positioning moving component 10 or the steel strip plate, thereby transmitting the signal to the PLC control system.

[0056] like Figure 8 As shown, the work plate body 201 has an arc-shaped placement groove 207 in the processing area F4. The work plate assembly 2 has a stripping component 9 vertically inserted inside the arc-shaped placement groove 207. The stripping component 9 includes a positioning rod 901 vertically inserted inside the work plate body 201. An adapter sleeve 902 is rotatably installed on the surface of the positioning rod 901. The surface of the adapter sleeve 902 extends out of the arc-shaped placement groove 207 toward the receiving cavity, and multiple bristles 903 are fixedly installed on the outer surface of the adapter sleeve 902.

[0057] The iron oxide scale on the surface of steel strip is composed of water-insoluble alkaline oxides, typically 5-20 μm thick. Due to their smaller coefficient of linear expansion compared to steel strip, numerous micro-cracks form on the surface during the cooling of hot-rolled steel strip coils. When these oxides are immersed in pickling solution or sprayed with pickling solution, they undergo a series of chemical reactions with the solution. Simultaneously, the iron oxide scale on the surface of carbon steel strips or low-alloy steel strips is relatively porous, even containing cracks and pores. Therefore, while the pickling solution reacts with the iron oxide scale, it also reacts with the base iron of the steel strip through these cracks and pores.

[0058] Pickling solution reacts with pure iron and base iron in iron oxide scale through cracks and pores, producing hydrogen gas. The expansion pressure generated by the hydrogen gas peels the iron oxide scale off the steel strip. During HCl pickling, 33% of the oxide scale is removed by mechanical peeling.

[0059] When the steel strip enters the processing area F4, the surface of the moving component 10 comes into contact with the surface of the adapter sleeve 902, thereby causing the adapter sleeve 902 to rotate. The brush on the surface of the adapter sleeve 902 is used to brush off the iron oxide scale on the surface of the steel strip, achieving the purpose of mechanical peeling.

[0060] Finally, the following points should be noted: First, in the description of this application, it should be noted that, unless otherwise specified and limited, the terms "installation", "connection", and "linkage" should be interpreted broadly, and can be mechanical or electrical connections, or internal connections between two components, or direct connections. "Up", "down", "left", "right", etc. are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may change.

[0061] Secondly: The accompanying drawings of the embodiments disclosed in this invention only involve the structures involved in the embodiments disclosed in this invention. Other structures can refer to the general design. In the absence of conflict, the same embodiment and different embodiments of this invention can be combined with each other.

[0062] In conclusion, the above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A low-carbon content single-stage annealing and acidification equipment, characterized in that, The primary annealing and acidification equipment includes four sets of support legs (1), two sets of working plate assemblies (2) are fixedly installed between the four sets of support legs (1), a receiving cavity is provided between the two sets of working plate assemblies (2), a moving assembly (10) is slidably installed inside the receiving cavity, a spraying assembly (4) is connected to the side wall of each set of working plate assemblies (2), a water supply assembly (5) is connected to one side of each set of working plate assemblies (2), a driving assembly (6) is slidably installed on the side wall of the working plate assembly (2), and the driving assembly (6) and the moving assembly (10) are set in a meshing transmission state; The working plate assembly (2) includes a working plate body (201). The working plate body (201) is divided into four regions along the horizontal axis of the working plate assembly (2). The four regions are spraying zone F1, adsorption zone F2, reaction zone F3 and treatment zone F4. A water cavity (202) is vertically opened in the region of spraying zone F1 of the working plate body (201). A vertical mounting groove (204) is opened on the side wall of the water cavity (202) of the working plate body (201). Multiple pressurizing nozzles (7) are inserted into the vertical mounting groove (204) of the working plate assembly (2). The multiple pressurizing nozzles (7) are connected to the water delivery assembly (5) through the working plate assembly (2). The working plate body (201) has a vacuum chamber (203) vertically opened in the region of the adsorption zone F2, and the working plate body (201) has a plurality of flow guide holes (206) on the side wall of the vacuum chamber (203). The working plate body (201) has a sloping groove (205) at the bottom of the adsorption zone F2. The bottom of the sloping groove (205) has multiple sets of water passage holes (208). The working plate assembly (2) has a guide plate (8) fixedly installed on the side wall of the sloping groove (205). The movable component (10) includes a sliding base (1001), a horizontal connecting plate (1002) is fixedly connected to one side of the sliding base (1001), a vertical rack (1003) is fixedly installed at the top of the horizontal connecting plate (1002), a square through groove (1004) is vertically opened inside the horizontal connecting plate (1002), a ball bearing (1005) is rotatably installed at the top of the sliding base (1001), and an insert component (11) is slidably installed inside the sliding base (1001) of the movable component (10). The sliding base (1001) has a set of wire holes (1006) running through its interior. The insertion assembly (11) includes multiple sets of locking plates (1101) that engage with the sliding base (1001). Each set of locking plates (1101) has two sets of vertical insert plates (1102) vertically inserted at its top. A set of rigid ropes (1103) is inserted inside the locking plates (1101). Multiple small steel balls (1104) are fixedly installed on the outer surface of the set of rigid ropes (1103), and both ends of the rigid ropes (1103) extend outward through (1106).

2. The low-carbon content single-stage annealing and acidification equipment according to claim 1, characterized in that: The water delivery assembly (5) includes a water delivery pipe (503) that is connected to the outer wall of the working plate body (201). The bottom end of the water delivery pipe (503) is fixedly connected to a vacuum negative pressure pump (502), and the input end of the vacuum negative pressure pump (502) is connected to a water tank (501).

3. The low-carbon content single-stage annealing and acidification equipment according to claim 2, characterized in that: The spraying assembly (4) includes a U-shaped pipe (401) fixedly installed on the outer wall of the working plate body (201). One end of the U-shaped pipe (401) is connected to a micro negative pressure pump (402), and the bottom end of the micro negative pressure pump (402) is provided with an output hole (403).

4. The low-carbon content single-stage annealing and acidification equipment according to claim 3, characterized in that: The drive assembly (6) includes a motor base (601) fixedly installed at one end of the work plate body (201). A stepper motor (602) is mounted on the top of the motor base (601). A rack (603) is fixedly connected to the output shaft end of the stepper motor (602). A transmission gear (604) meshes with the surface of the rack (603). The transmission gear (604) is rotatably installed on the surface of the work plate body (201). The rack (603) is horizontally slidably installed on the surface of the work plate body (201).

5. The low-carbon content single-stage annealing and acidification equipment according to claim 4, characterized in that: A positioning component (3) is fixedly installed at the top of the work board assembly (2). The positioning component (3) includes four sets of vertical columns (301) inserted into the top of the work board body (201). A horizontal mounting plate (302) is fixedly installed at the top of the column (301). Multiple infrared rangefinders (303) are fixedly installed on the side of the horizontal mounting plate (302) facing the work board body (201).

6. The low-carbon content single-stage annealing and acidification equipment according to claim 5, characterized in that: The work plate body (201) has an arc-shaped placement groove (207) in the processing area F4. The work plate assembly (2) has a stripping component (9) vertically inserted inside the arc-shaped placement groove (207). The stripping component (9) includes a positioning rod (901) vertically inserted inside the work plate body (201). A transition sleeve (902) is rotatably installed on the surface of the positioning rod (901). The surface of the transition sleeve (902) extends out of the arc-shaped placement groove (207) toward the receiving cavity. A plurality of bristles (903) are fixedly installed on the outer surface of the transition sleeve (902).

7. A low-carbon content single-stage annealing process, using the low-carbon content single-stage annealing acidification equipment as described in claim 6, characterized in that, Includes the following steps: S1: Raw materials containing iron ore and coal are put into a converter for smelting and vacuum treatment to obtain steel strip with the target composition. The target composition contains Fe, which is an impurity. The obtained steel strip is rolled and continuously cast, and then hot rolled into coils by a hot rolling mill. S2: After removing the strapping from the steel strip coil raw material obtained in step S1, place it on the storage platform, send it to the steel strip coil preparation station via the coil loading trolley, send it to the uncoiler for uncoiling, send it to the acidification equipment for HCl pickling treatment, and then dry it. S3: The steel strip after S2 is pickled with HCl is sent to a 20-roll Sendzimir mill for rolling, and then the rolled steel strip is coiled into a continuous furnace for decarburization annealing to complete the primary crystallization. S4: After the steel strip obtained in S3 is rolled a second time, the steel strip is restored and annealed, and the temperature is increased, followed by high-temperature stretching annealing and coating on the surface of the steel strip. The finished product is then finished and coiled, and the process is completed.

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