System and method for removing oxide skin of steel cord through non-contact alternate electrolytic pickling

Abstract

The invention provides a system and method for removing oxide skin of a steel cord through non-contact alternate electrolytic pickling, and the system comprises a bottom tank body which is filled with sulfuric acid liquid for pickling; the two groups of pickling tanks adopt a 5 + 5 grouping design, and the two groups of pickling tanks are the same in electrode arrangement and are arranged according to a positive-negative-negative-negative-positive electrode sequence. Guide plates are arranged between the pickling tanks. The upper tank body of the pickling tank is erected above the bottom tank body and does not make direct contact with sulfuric acid, the sulfuric acid is pumped from the bottom tank body to the upper tank body through an independent lifting pump and circularly flows, and the sulfuric acid overflowing towards the two sides downwards flows into the bottom tank body under the action of a flow guide plate. The steel cord steel wire is located above the upper groove in the pickling process, makes contact with the ceramic carrier roller and does not make contact with a polar plate of the upper groove; sulfuric acid liquid serves as a conducting medium, the steel wire sequentially passes through the anode area and the cathode area after the polar plates are electrified, the steel wire serves as an opposite cathode or anode, electrochemical reaction is generated, non-contact alternate pickling is conducted on the steel wire, and surface oxide skin is removed.

Description

Technical Field

[0001] The present invention relates to the technical field of steel cord production, and in particular to a technical process for removing oxide scale, and in particular to a system and method for removing oxide scale from steel cord by non-contact alternating electrolytic pickling. Background Art

[0002] Steel cord is a special-purpose fine-gauge steel strand or rope made of high-quality high-carbon steel and plated with brass. It is mainly used in car tires, light truck tires, heavy truck tires, construction machinery tires, aircraft tires and other rubber product skeleton materials. In the production process, obtaining high-quality steel cord is crucial to the performance and safety of tires and other products.

[0003] The production process of steel cord is long. After hot rolling, heat treatment and other processes, a layer of oxide scale will form on its surface, which is mainly composed of iron oxide. The presence of oxide scale will increase the friction between the steel wire and the die during the subsequent drawing process, resulting in an increase in the drawing force. Excessive drawing force will not only accelerate the wear of the die, but may also cause the surface quality of the steel cord to deteriorate, such as scratches, cracks and other defects, and even lead to wire breakage. Therefore, before the subsequent drawing process, it is necessary to remove the oxide scale on the surface of the steel cord by pickling.

[0004] At present, the descaling of steel cord is mainly carried out by cathode pickling or anodic pickling process, both of which require contact conduction with conductive rollers. Under high current density, the steel wire will be injured by electric sparks, resulting in surface damage. At the same time, if the oxide scale on the surface of the steel wire is not cleaned, the subsequent electroplating coating will not have a strong bonding force and the coating will be easily peeled off. The steel wire injured by sparks will break when it is drawn. Summary of the invention

[0005] In view of the defects and shortcomings of the prior art, the purpose of the present invention is to provide a system and method for contactless alternating electrolytic pickling to remove oxide scale of steel cord, which utilizes the gas generated by the electrochemical reaction on the steel wire to loosen and peel off the iron oxide scale and dirt on the surface of the steel wire, while sulfuric acid and iron oxide undergo chemical dissolution, thereby achieving the effect of removing the oxide scale.

[0006] According to a first aspect of the present invention, a system for removing oxide scale by non-contact alternating electrolytic pickling of steel cord is provided, comprising:

[0007] The bottom tank body is configured to accommodate multiple pickling tanks and is filled with sulfuric acid liquid for pickling;

[0008] The first group consists of the first five pickling tanks;

[0009] The second group is composed of the last five pickling tanks. The electrodes of the pickling tanks in the first group and the second group are arranged in the same order of positive-negative-negative-negative-positive to form corresponding anode and cathode areas, and one cathode area is closed as a standby area during operation.

[0010] Each section of the pickling tank adopts the same structural design, and guide plates are set between the pickling tanks;

[0011] The pickling tank includes an upper tank, which is provided with a plate connected to a power source, and the upper tank is integrally mounted on the side wall of the bottom tank body and does not directly contact the sulfuric acid liquid; the upper tank uses an independent lifting pump to pump the sulfuric acid liquid from the bottom tank body to the upper tank and circulate it, and the sulfuric acid liquid overflowing to both sides flows downward into the bottom tank body under the action of the guide plate;

[0012] The pickling tank is provided with a pair of ceramic rollers along the sides in the length direction. During the pickling process, the steel cord wire is located above the upper tank, in contact with the ceramic rollers, and not in contact with the pole plates of the upper tank. The space between the steel wire and the pole plate is filled with sulfuric acid liquid pumped to the upper tank. The sulfuric acid liquid is used as the conductive medium. The steel wire passes through the anode area and the cathode area of ​​the pole plates after power is applied. The steel wire acts as a relative cathode or anode to generate an electrochemical reaction, and the steel wire is alternately pickled without contact to remove surface oxide scale.

[0013] As an optional embodiment, the plates of each pickling tank located in the cathode area are connected in parallel to the negative terminal of the rectifier cabinet;

[0014] The plates of each pickling tank located in the anode area are connected in parallel to the positive terminal of the rectifier cabinet;

[0015] The rectifier cabinet controls the pickling current through a control system.

[0016] As an optional embodiment, the first group consisting of the first five pickling tanks, the plates of the pickling tanks located in the cathode area or the anode area are allocated to be connected to the first rectifier cabinet, and the first rectifier cabinet is connected to control the pickling current of the first group;

[0017] The second group consisting of the last five pickling tanks has its pole plates located in the cathode area or the anode area connected to the second rectifier cabinet, which controls the pickling current of the second group.

[0018] As an optional embodiment, openings are provided in the middle of the pole plates of the pickling tank.

[0019] As an optional embodiment, the opening is a narrow waist-shaped opening.

[0020] As an optional embodiment, the inner bottom surface of the bottom trough body is a slope, and the inclination angle is controlled at 5° to 15°.

[0021] As an optional embodiment, a cylinder is provided along the vertical direction on one side of the upper tank of the pickling tank, a lifting pump is installed on the upper end of the cylinder, and the lower end is inserted into the bottom tank body and immersed in the sulfuric acid liquid. The lifting pump drives the rotation of the propeller blades to circulate the sulfuric acid liquid in the bottom tank body and lift it to the upper tank.

[0022] As an optional embodiment, the upper tank includes an upper tank body having a groove shape, and the electrode plate is installed on the upper surface of the upper tank body;

[0023] The pair of ceramic rollers are installed to the side positions of the upper tank body in the length direction via the roller frame, and the ceramic rollers can rotate freely on the roller frame.

[0024] As an optional embodiment, the sulfuric acid pumped to the upper tank by the above-mentioned lifting pump surges up and submerges the steel wire located above the roller frame, and overflows to both sides of the upper tank. When overflowing toward both sides, it touches the guide plate and then flows downward into the bottom tank body, thereby suppressing the splashing of sulfuric acid liquid.

[0025] According to a second aspect of the present invention, a method for contactless alternating electrolytic pickling of steel cord to remove oxide scale is also provided, the method comprising the following steps:

[0026] Power is supplied to a first group consisting of the first five pickling tanks and a second group consisting of the last five pickling tanks;

[0027] In the first group and the second group, the lifting pumps are started to pump the sulfuric acid liquid to the upper tank, and the lifting pumps of one section of the cathode area are closed respectively. During use, the cathode area is alternately closed and started to facilitate cleaning of the sludge at the bottom of the cathode area;

[0028] During operation, the steel wire continuously passes through the upper trough, contacts the ceramic roller and does not contact the electrode plate. The space between the steel wire and the electrode plate is filled with sulfuric acid liquid. With sulfuric acid as the conductive medium, an electrochemical reaction occurs on the steel wire. The generated gas loosens and peels off the iron oxide layer and dirt on the surface of the steel wire, and chemically dissolves the iron oxide layer through sulfuric acid to remove the oxide layer, including:

[0029] When the steel wire is used as the relative cathode, the electrode reaction is as follows:

[0030] 2H + +2e→H2↑;

[0031] When the steel wire is used as the relative anode, the electrode reaction is as follows:

[0032] SO4 2- →SO4+2e;

[0033] 2SO4+2H2O→2H2SO4+O2↑.

[0034] It should be understood that all combinations of the aforementioned concepts and the additional concepts described in more detail below can be considered as part of the inventive subject matter of the present disclosure as long as such concepts are not mutually inconsistent. In addition, all combinations of the claimed subject matter are considered as part of the inventive subject matter of the present disclosure.

[0035] The foregoing and other aspects, embodiments and features of the present invention can be more fully understood from the following description in conjunction with the accompanying drawings. Other additional aspects of the present invention, such as the features and / or beneficial effects of the exemplary embodiments, will be apparent from the following description or learned from the practice of the specific embodiments according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The accompanying drawings are not intended to be drawn to scale. In the accompanying drawings, each identical or nearly identical component shown in each figure may be represented by the same reference numeral. For clarity, not every component is labeled in each figure. Embodiments of various aspects of the present invention will now be described by way of example and with reference to the accompanying drawings.

[0037] Figure 1 1 is a schematic diagram of a system for contactless alternating electrolytic pickling of steel cords to remove oxide scale according to an embodiment of the present invention.

[0038] Figure 2A , 2B It is a schematic diagram of a total of 10 pickling tanks including 5 front sections and 5 rear sections according to an embodiment of the present invention.

[0039] Figure 3 Schematic diagram of steel cord wire passing through a pickling tank according to an embodiment of the present invention.

[0040] Figure 4 is based on Figure 3 The example shown is a zoomed in view of a single steel wire passing through a pickling tank.

[0041] Figure 5 Schematic diagram of a guide plate in a bottom tank body according to an embodiment of the present invention.

[0042] Figure 6 It is a side cross-sectional view of an upper tank installed in a bottom tank body according to an embodiment of the present invention.

[0043] Figure 7 Schematic diagram of the overall structure of the upper tank according to an embodiment of the present invention.

[0044] Figure 8 Schematic diagram of the upper slot decomposition structure according to an embodiment of the present invention.

[0045] Fig. 9 is a half-section view of an upper slot according to an embodiment of the present invention. DETAILED DESCRIPTION

[0046] In order to better understand the technical content of the present invention, specific embodiments are given and described as follows in conjunction with the accompanying drawings.

[0047] Various aspects of the present invention are described in this disclosure with reference to the accompanying drawings, in which many illustrative embodiments are shown. The embodiments of the present disclosure are not necessarily intended to include all aspects of the present invention. It should be understood that the various concepts and embodiments introduced above, as well as those described in more detail below, can be implemented in any of many ways, because the concepts and embodiments disclosed by the present invention are not limited to any implementation. In addition, some aspects disclosed by the present invention can be used alone or in any appropriate combination with other aspects disclosed by the present invention.

[0048] {Example 1}

[0049] Combination Figures 1 to 9 As shown, the system for removing oxide scale by non-contact alternating electrolytic pickling of steel cord according to an embodiment of the present invention includes a bottom tank body 100 and two groups of pickling tanks 10 arranged in the bottom tank body 100.

[0050] like Figure 1 to Figure 4 As shown, the bottom tank body 100 is configured to accommodate the multi-section pickling tank 10 and is filled with sulfuric acid liquid for pickling.

[0051] In an embodiment of the present invention, two groups of pickling tanks 10 are designed in a 5+5 grouping, with the first group consisting of the first five sections of pickling tanks 10 and the second group consisting of the last five sections of pickling tanks 10 .

[0052] Combination Figure 1 As shown, the electrode arrangements of the pickling tanks 10 in the first group and the second group are the same, and are arranged in the order of positive-negative-negative-negative-positive to form corresponding anode areas and cathode areas, and during operation, one cathode area is closed as a spare area.

[0053] Combination Figure 1 As shown, the pole plates 15 of each pickling tank 10 located in the cathode area are connected to the negative terminal of the rectifier cabinet in parallel; and the pole plates 15 of each pickling tank 10 located in the anode area are connected to the positive terminal of the rectifier cabinet in parallel.

[0054] Therefore, a rectifier cabinet is used to control the pickling current through the control system.

[0055] In other optional embodiments, the first group consisting of the first five pickling tanks 10, whose pole plates are located in the cathode area or the anode area, are allocated to be connected to the first rectifier cabinet, and the first rectifier cabinet is connected to control the pickling current of the first group; the second group consisting of the last five pickling tanks 10, whose pole plates are located in the cathode area or the anode area, are allocated to be connected to the second rectifier cabinet, and the second rectifier cabinet is connected to control the pickling current of the second group.

[0056] Therefore, each group has an independent rectifier cabinet to control the pickling current.

[0057] In the design of the present invention, the total current range of each steel wire is controlled within 50-150A (total current of front and rear), and the sulfuric acid concentration is controlled within 300±50g / l.

[0058] Combination Figure 3 to Figure 9 As shown, each section of the pickling tank 10 adopts the same structural design, and guide plates 110 are arranged between the pickling tanks 10 .

[0059] Combination Figure 7 to Figure 9 As shown, the pickling tank 10 includes an upper tank 14, which is provided with a pole plate 15 connected to a power source. The upper tank 14 is integrally mounted above the side wall of the bottom tank body 100 and does not directly contact the sulfuric acid liquid. The upper tank 14 uses an independent lifting pump to pump the sulfuric acid liquid from the bottom tank body 100 to the upper tank 14 and circulate it. The sulfuric acid liquid overflowing to both sides flows downward into the bottom tank body 100 under the action of the guide plate 110.

[0060] A cylinder 12 is arranged along the vertical direction on one side of the upper tank 14 of the pickling tank 10, a lifting pump 13 is installed on the upper end of the cylinder 12, and the lower end of the cylinder 12 is immersed in the sulfuric acid liquid in the bottom tank body 100, and the lifting pump 13 drives the rotation of the propeller blade 13A to circulate and lift the sulfuric acid liquid in the bottom tank body 100 to the upper tank 14.

[0061] The upper tank 14 includes an upper tank body 14A having a groove shape, and the pole plate 15 is installed on the upper surface of the upper tank body 14A. A pair of ceramic rollers 16 are installed to the side positions of the upper tank body 14A in the length direction via a roller frame 17, and the ceramic rollers 16 can rotate freely on the roller frame 17.

[0062] In the embodiment of the present invention, an independent lifting pump is used to replace the overall circulation pump. Each pickling tank uses an independent lifting pump, and each section of the pickling tank works independently without affecting each other. Even if one stops working, the sulfuric acid in the other sections of the tank can still flood the steel wire, reducing the risk of the steel wire not being cleaned. At the same time, the use of an independent lifting pump further increases the circulation capacity, so that the acid around the steel wire is continuously renewed, improving the pickling effect.

[0063] Combination Figure 3, Figure 4 as well as Figure 7 to Figure 9 The pickling tank 10 shown in the figure has a pair of ceramic rollers 16 arranged along the side of the length direction. During the pickling process, the steel cord wire 1 is located above the upper tank 14 and contacts the ceramic rollers 16, but does not contact the pole plate 15 of the upper tank 14. Fig. 9 As shown, the flow direction of sulfuric acid liquid is indicated. The space between the steel wire 1 and the electrode plate 15 is filled with sulfuric acid liquid pumped to the upper tank 14. With sulfuric acid liquid as the conductive medium, the steel wire passes through the anode area and cathode area of ​​the electrode plate after power is applied. The steel wire acts as the relative cathode or anode to generate an electrochemical reaction, and the steel wire 1 is alternately pickled without contact to remove the surface oxide scale.

[0064] The sulfuric acid pumped to the upper tank 14 by the lifting pump 13 surges up and submerges the steel wire 1 located above the roller frame 17, and overflows to both sides of the upper tank 14. When overflowing to both sides, it touches the guide plate 110 and then flows downward into the bottom tank body 100, thereby suppressing the splashing of the sulfuric acid liquid.

[0065] As an optional embodiment, an opening 15A is provided in the middle of the electrode plate 15 of each pickling tank 10. In a preferred embodiment, the opening 15A is a narrow waist-shaped opening.

[0066] Therefore, by digging holes in the middle of the plate, the circulation capacity of sulfuric acid can be increased, and at the same time, the sludge on the surface of the plate can be washed away, thereby extending the service life of the plate and improving the pickling effect of the steel wire.

[0067] As an optional embodiment, the inner bottom surface of the bottom tank body 100 is surrounded by a slope 120, and the inclination angle is 5° to 15°. Compared with the problem that the sulfuric acid is not fluid during production work and the sludge is easily accumulated at the bottom of the tank, which affects the circulation due to the traditional flat bottom design, the present invention designs the bottom of the tank to be a slope design, and utilizes the fluidity of the slope itself and the circulation pump passing through the bottom of the tank, so that it is easier to pump out to the buffer tank and discharge the sludge in time, which is beneficial to the cleaning of the operator, and at the same time ensures that the steel wire is in a relatively good pickling environment, thereby improving the pickling quality.

[0068] Among them, the buffer tank can also be used for liquid preparation. When the sulfuric acid concentration is not enough, sulfuric acid is added and sent into the bottom tank through a circulation pump to continuously replenish new sulfuric acid liquid.

[0069] In combination with the system for non-contact alternating electrolytic pickling and descaling of steel cords in the above embodiment, the system is used to implement non-contact alternating electrolytic pickling and descaling of steel cords, and the process includes the following steps:

[0070] Power is supplied to the first group consisting of the first five pickling tanks 10 and the second group consisting of the last five pickling tanks 10;

[0071] In the first group and the second group, the lifting pumps are started to pump the sulfuric acid liquid to the upper tank 14, and the lifting pumps of one section of the cathode area are closed respectively. During use, the cathode area is alternately closed and started to facilitate cleaning of the sludge at the bottom of the cathode area;

[0072] During operation, the steel wire 1 continuously passes over the upper trough 14, contacts the ceramic roller 16 and does not contact the electrode plate 15. The space between the steel wire 1 and the electrode plate 15 is filled with sulfuric acid liquid. With sulfuric acid as a conductive medium, an electrochemical reaction occurs on the steel wire. The generated gas loosens and peels off the iron oxide layer and dirt on the surface of the steel wire, and chemically dissolves the iron oxide layer through sulfuric acid to remove the oxide layer.

[0073] The electrochemical reaction when power is applied is as follows:

[0074] When the steel wire is used as the relative cathode, the electrode reaction is as follows:

[0075] 2H + +2e→H2↑;

[0076] When the steel wire is used as the relative anode, the electrode reaction is as follows:

[0077] SO4 2- →SO4+2e;

[0078] 2SO4+2H2O→2H2SO4+O2↑.

[0079] Thereby, the oxide scale on the surface of the steel cord wire is effectively removed, the pickling quality is improved, the bonding strength of the subsequent coating on the surface of the steel cord wire is improved, the drawing efficiency is improved, and the mold wear and steel cord surface defects are reduced.

[0080] Combination Figure 1 As shown, in this embodiment, during operation, the steel wire is located above the upper tank, in contact with the ceramic roller, and not in contact with the pole plate. The space between the steel wire and the pole plate is filled with sulfuric acid liquid, and sulfuric acid is used as a conductive medium. The state of the power supply anode plate is 5 (+--+) in the front and 5 (+--+) in the back. During normal operation, one cathode area of ​​each of the front and rear groups is closed by turning off the circulation pump. Since the circulation pump is turned off and there is no sulfuric acid for conductivity, the pickling tank in this closed section is no longer energized, and this cathode area belongs to the spare area. Therefore, the cathode areas are alternately closed to clean the dirt on the pole plate. In actual working process, only two cathode areas need to be used. Among the three cathode areas in each group, one is for standby and is usually closed, which is helpful to observe and clean the sludge in the cathode tank (more sludge is produced in the cathode area).

[0081] It should be understood that Figure 1In the example, the front 5 sections and the rear 5 sections are connected together. In another embodiment, the front and rear 5 sections can each be connected to a rectifier cabinet to disperse the current, and two rectifier cabinets can be used to reduce the pressure on the rectifier cabinets.

[0082] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. A person with ordinary knowledge in the technical field to which the present invention belongs may make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be determined by the definition of the claims.

Claims

1. A system for removing oxide scale by non-contact alternating electrolytic pickling of steel cord, characterized in that: include: The bottom tank body (100) is configured to accommodate the multi-section pickling tank (10) and be filled with sulfuric acid liquid for pickling; The first group is composed of the first five pickling tanks (10); A second group consisting of the last five pickling tanks (10), wherein the electrodes of the pickling tanks (10) in the first group and the second group are arranged in the same electrode sequence of positive-negative-negative-negative-positive to form corresponding anode areas and cathode areas, and during operation, one cathode area is closed as a standby area; Each section of the pickling tank (10) adopts the same structural design, and a guide plate (110) is arranged between the pickling tanks (10); The pickling tank (10) comprises an upper tank (14), the upper tank (14) is provided with an electrode plate (15) connected to a power source, and the upper tank (14) is integrally mounted on the side wall of the bottom tank body (100) and does not directly contact the sulfuric acid liquid; the upper tank (14) uses an independent lifting pump to pump the sulfuric acid liquid from the bottom tank body (100) to the upper tank (14) for circulation, and the sulfuric acid liquid overflowing toward both sides flows downward into the bottom tank body (100) under the action of the guide plate (110); The pickling tank (10) is provided with a pair of ceramic rollers (16) along the side in the length direction. During the pickling process, the steel cord wire (1) is located above the upper tank (14), in contact with the ceramic rollers (16), and not in contact with the electrode plate (15) of the upper tank (14). The space between the steel wire (1) and the electrode plate (15) is filled with sulfuric acid liquid pumped into the upper tank (14). The sulfuric acid liquid is used as the conductive medium. The steel wire passes through the anode area and the cathode area after the electrode plate is energized in sequence. The steel wire acts as a relative cathode or anode to generate an electrochemical reaction, and the steel wire (1) is pickled alternately without contact to remove the surface oxide scale.

2. The system for removing oxide scale by non-contact alternating electrolytic pickling of steel cord according to claim 1, characterized in that: Each pickling tank (10) located in the cathode area has its electrode plate (15) connected in parallel to the negative electrode terminal of the rectifier cabinet; Each pickling tank (10) located in the anode area has its electrode plate (15) connected in parallel to the positive terminal of the rectifier cabinet; The rectifier cabinet controls the pickling current through a control system.

3. The system for removing oxide scale by non-contact alternating electrolytic pickling of steel cord according to claim 1, characterized in that: A first group consisting of the first five pickling tanks (10), wherein the pole plates of the pickling tanks (10) located in the cathode area or the anode area are connected to a first rectifier cabinet, and the first rectifier cabinet is connected to control the pickling current of the first group; The second group consisting of the last five pickling tanks (10) has its pole plates located in the cathode area or the anode area of ​​the pickling tank (10) distributed and connected to the second rectifier cabinet, which controls the pickling current of the second group.

4. The system for removing oxide scale by non-contact alternating electrolytic pickling of steel cord according to claim 1, characterized in that: Openings (15A) are provided at the middle positions of the pole plates (15) of the pickling tank (10).

5. The system for removing oxide scale by non-contact alternating electrolytic pickling of steel cord according to claim 1, characterized in that: The opening (15A) is a narrow waist-shaped opening.

6. The system for removing oxide scale by non-contact alternating electrolytic pickling of steel cord according to claim 1, characterized in that: The inner bottom surface of the bottom trough body (100) is a slope with an inclination angle of 5° to 15°.

7. The system for removing oxide scale by non-contact alternating electrolytic pickling of steel cord according to any one of claims 1 to 5, characterized in that: A cylinder (12) is arranged along the vertical direction on one side of the upper tank (14) of the pickling tank (10). A lifting pump (13) is installed on the upper end of the cylinder (12). The lower end of the cylinder (12) extends into the bottom tank body (100) and is immersed in the sulfuric acid liquid. The lifting pump (13) drives the propeller blades (13A) to rotate to circulate and lift the sulfuric acid liquid in the bottom tank body (100) to the upper tank (14).

8. The system for removing oxide scale by non-contact alternating electrolytic pickling of steel cord according to claim 7, characterized in that: The upper tank (14) comprises an upper tank body (14A) having a groove shape, and the pole plate (15) is installed on the upper surface of the upper tank body (14A); The pair of ceramic rollers (16) are installed on the side of the upper tank body (14A) in the length direction via a roller frame (17), and the ceramic rollers (16) can rotate freely on the roller frame (17).

9. The system for removing oxide scale by non-contact alternating electrolytic pickling of steel cord according to claim 7, characterized in that: The sulfuric acid pumped to the upper tank (14) by the lifting pump (13) surges up and submerges the steel wire (1) located above the roller frame (17), and overflows to both sides of the upper tank (14). When overflowing to both sides, it touches the guide plate (110) and then flows downward into the bottom tank body (100), thereby suppressing the splashing of sulfuric acid liquid.

10. A method for removing oxide scale by non-contact alternating electrolytic pickling of steel cords based on the system for removing oxide scale by non-contact alternating electrolytic pickling of steel cords as claimed in any one of claims 1 to 9, characterized in that: The method comprises the following steps: Power is supplied to a first group consisting of the first five pickling tanks (10) and a second group consisting of the last five pickling tanks (10); In the first group and the second group, the lifting pumps are started to pump the sulfuric acid liquid to the upper tank (14), and the lifting pumps of one section of the cathode area are respectively closed. During use, the cathode area is alternately closed and started to facilitate cleaning of the sludge at the bottom of the cathode area; During operation, the steel wire (1) continuously passes through the upper trough (14), contacts the ceramic roller (16) and does not contact the electrode plate (15). The space between the steel wire (1) and the electrode plate (15) is filled with sulfuric acid liquid. With sulfuric acid as a conductive medium, an electrochemical reaction occurs on the steel wire. The generated gas loosens and peels off the iron oxide layer and dirt on the surface of the steel wire. The sulfuric acid and the iron oxide layer undergo a chemical dissolution reaction to remove the oxide layer, wherein: When the steel wire is used as the relative cathode, the electrode reaction is as follows: <h2 style=";text-align:left;direction:ltr">2H<h2 style=";text-align:left;direction:ltr"> + <h2 style=";text-align:left;direction:ltr"> +2e→H2↑; When the steel wire is used as the relative anode, the electrode reaction is as follows: <h2 style=";text-align:left;direction:ltr">SO4<h2 style=";text-align:left;direction:ltr"> 2- <h2 style=";text-align:left;direction:ltr"> →SO4+2e; 2SO4+2H2O→2H2SO4+O2↑.

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