A material rolling heating device

Abstract

The present application relates to a kind of rolling stock heating equipment, including belt frame water tank, collector is connected at the bottom of belt frame water tank, shell is arranged in belt frame water tank, at least three independent anode reaction chamber devices are arranged in shell;The reaction chamber device is independent of each other and is connected to separate power supply;Electrolyte is supplied to independent reaction chamber device via connecting pipe;The window of reaction chamber device is opened, forms long electrolyte cell filled with flowing electrolyte;Longitudinally moving rolling stock is immersed in the electrolyte cell, and each section of rolling stock is sequentially passed through the window of all reaction chamber devices;The present application is simple in structure, ingenious in design, will significantly improve rolling stock workpiece heating efficiency and processing production efficiency.

Description

Technical Field

[0001] This invention belongs to the fields of metallurgy and mechanical manufacturing technology, and in particular relates to a rolling mill heating device. Background Technology

[0002] ① An existing device for heating workpieces [1. Kashin Yu.A., A.C.933742., M., Class 3, C21D1 / 40, C21D9 / 62, "Device for Heating Workpieces", Publication Date: June 7, 1982.] comprises: a water tank with a chamber and a conductive liquid; a power supply with electrical contact elements, wherein the electrical contact elements are located in the chamber and connected to a channel for placing the workpiece, allowing the workpiece to move linearly within the channel. The device has a forced circulation mechanism for the medium (electrolyte), and the chamber and the channel for placing the workpiece are interconnected. Furthermore, the chamber wall has holes, and the axis of the holes does not coincide with the axis of the chamber. These important features are designed to improve the uniformity of the heating temperature.

[0003] The disadvantages of this equipment are that the temperature field of the heated workpiece is the same in all chambers, so it cannot ensure the uniformity of heating along the cross section when the workpiece moves at high speed; the equipment does not contain temperature sensors and the heating power cannot be controlled by feedback, which limits its production efficiency.

[0004] ② An existing device for continuously heating workpieces in an electrolyte [2.A.Ya.Fominov., A.C.579324., M., Class 3, C21D1 / 44, "Device for Continuously Heating Workpieces in an Electrolyte", Publication Date: November 16, 1977] comprises: a water tank with an anode, an electrolyte circulation system, and a mechanism for forward translation of the workpiece. Key components of this device also include: a double-jointed disc anode with a rotary actuator, grooves machined on the outer surface of the discs to form channels through which the electrolyte for heating the workpiece passes, with the end of the disc 0.5–1 mm from the surface of the water tank shell. This device has high production efficiency; however, like device 1, it lacks workpiece heating control and regulation functions. Disadvantages of this device also include: the heating intensity at the workpiece inlet and outlet is the same, making it impossible to ensure a high heating rate and uniform temperature distribution along the workpiece cross-section.

[0005] ③ Existing apparatus for heating metals in an electrolyte [3.A.Ya.Fominov., L.Anagorsky et al., A.C.411136, M., Class 3, C21d 1 / 14, C21d 9 / 46, "Apparatus for Heating Metals in an Electrolyte", Publication Date: May 12, 1974], such as an apparatus for heating thin steel sheets. This apparatus includes: a water tank with an insulated passage chamber (for heating the steel strip to 300–400°C); guide rollers; and an electrolyte capable of being sprayed, with an electrode voltage of 60–80V. All equipment components are located on the side of a horizontally moving workpiece, and the electrolytic cell consists of two nozzles made of insulating material facing the workpiece. This apparatus can be used for surface treatment and high-speed heating. In this apparatus, the energy consumption for heating the chamber walls and the electrolyte is high. Another disadvantage is that the surface of the rollers needs to be heated, which also increases energy consumption. A common drawback of this device, along with previous models, is the lack of a temperature control system and a system for differentiated control of the heating power to the workpiece based on its temperature. Furthermore, the device's design makes it unsuitable for controlled heating of long, cylindrical workpieces.

[0006] ④ Existing electrolytic plasma treatment equipment for long workpieces [4. VCStanishevsky, AA Kosobutsky et al., A.C. 1615241, International Patent Classification, Class 5, C25F7 / 00, C25D 7 / 06, "Methods and apparatus for electrolyte-plasma processing", publication date: December 23, 1990], comprising a tank for the inflow and outflow of electrolyte. It is characterized by a steam outlet orifice coaxial with a vertical axis. The steam outlet is made of two or more conical funnels connected in series with the axial channel of the long workpiece. The steam outlet can be spiral-shaped and can rotate about the axis of the tank.

[0007] While this device reasonably solves the exhaust problem, all other issues related to controlling the heating power, like those of similar devices mentioned earlier, remain unresolved. Therefore, this device cannot heat workpieces at high speed and with high quality.

[0008] ⑤ The closest invention is a surface treatment apparatus [5. Ryabkov DV, International Patent Classification, Level 5, C23C16 / 44, "Surface Treatment Apparatus", Application Registration No.: 97100692, Publication Date: May 20, 1998], which includes a reaction chamber with dispersing nozzles to allow for uniform distribution of the electrolyte. This apparatus also includes an evaporator for partial or complete evaporation of the electrolyte and an anode with through-holes for supplying a conductive medium (electrolyte) to the treated surface.

[0009] To maintain uniformity and safety in surface treatment processes, the equipment employs a dedicated system to hold the anode and the workpiece in place. This equipment forms a stable, reducing plasma layer near the workpiece surface. Energy transfer is achieved by supplying a conductive medium (electrolyte) to the treated surface via a viad anode; the electrolyte is an aqueous solution of a metal salt. The equipment's structure eliminates the need for non-oxidative heating or chemical heat treatment of long workpieces, but it does not address the challenge of rapid and uniform heating along the cross-section of long rolled workpieces. A drawback is the use of only one reaction chamber, which makes plasma heating difficult when a cold workpiece first enters. Other disadvantages include the inability to establish a stable process on rapidly moving workpieces within a single chamber. This is because the workpiece exhibits different temperatures and surface cleanliness at the chamber's inlet and outlet; at the inlet, an oxide film on the workpiece surface necessitates a higher current intensity; and after removing the oxide film in subsequent chambers, the current and voltage between the product and the conductive anode must be reduced.

[0010] The shortcomings of this equipment are the same as above: it cannot ensure uniform heating of the workpiece along its cross-section, which greatly reduces production capacity; as the workpiece temperature rises, the voltage must be reduced to ensure uniform heating of the workpiece cross-section. A sufficiently long heating time is required to balance the temperature of the workpiece cross-section. In this prototype equipment, because there is only one reaction chamber, these requirements cannot be met.

[0011] Therefore, improvements are needed to address the aforementioned issues. Summary of the Invention

[0012] The present invention aims to overcome the shortcomings of the prior art and provide a rolling mill heating device to improve workpiece heating efficiency and processing efficiency.

[0013] To achieve the above objectives, the technical solution adopted by the present invention is as follows: a rolling mill heating device, comprising a framed water tank, a current collector connected to the bottom of the framed water tank, and a shell disposed inside the tank. Within the shell are at least three independent reaction chamber devices with anodes. Each reaction chamber device is independent of the others and connected to a separate power supply; electrolyte is supplied to the independent reaction chamber devices via connecting pipes; the windows of the reaction chamber devices are opened to form a long electrolyte pool filled with flowing electrolyte; longitudinally moving rolling mill is immersed in the electrolyte pool, with each segment of the rolling mill passing sequentially through the windows of all the reaction chamber devices.

[0014] In a preferred embodiment of the present invention, the anode in the reaction chamber device at the outlet of the rolled material is connected to a sensor, which is a non-contact temperature sensor and is connected to a thermal power control circuit; the sensor is connected to a voltage control circuit in the output chamber to control the heating power of the rolled material according to the temperature of the rolled material.

[0015] As a preferred embodiment of the present invention, a speed sensor for the movement of the rolled material is installed inside the frame water tank. A current collector passes through the frame water tank and is connected to the speed sensor. The speed sensor measures the speed of the rolled material. Power is cut off when the speed is low to ensure safe operation when the speed of the rolled material is changed.

[0016] In a preferred embodiment of the present invention, the reaction chamber device is fixed to a housing made of insulating material by a bracket and bolts; a point contactor is provided on the outside of the housing, and the point contactor is connected to the distributor by a wire.

[0017] In a preferred embodiment of the present invention, a metal anode is arranged inside the reaction chamber device, and the window is located at the center of the reaction chamber device; the metal anode is connected to the power supply through a terminal, and the terminal is enclosed by a shell.

[0018] In a preferred embodiment of the present invention, the surface of the metal anode is parallel to the rolling direction of the rolled material.

[0019] As a preferred embodiment of the present invention, the anode voltage in the reaction chamber device at the feed inlet of the rolled material is 280-340V, and the anode voltage in the reaction chamber device located in the middle is 180-220V.

[0020] As a preferred embodiment of the invention, it also includes a pump for conveying electrolyte, which delivers the electrolyte to an adjustable flow hydraulic system and a distributor.

[0021] As a preferred embodiment of the present invention, the reaction chamber device is a reaction chamber with a dispersion nozzle.

[0022] As a preferred embodiment of the present invention, the reaction chamber device includes a first reaction device, a second reaction device, a third reaction device and a fourth reaction device arranged in sequence.

[0023] The beneficial effects of this invention are:

[0024] 1. This invention has a simple structure and ingenious design, which can improve the heating efficiency and processing efficiency of rolled materials;

[0025] 2. This invention simplifies the structure of the equipment, is highly operable, has high heating precision, good uniformity of cross-sectional heating, and ensures that the workpiece surface remains clean and does not oxidize during heating;

[0026] 3. This invention can improve the productivity and heating characteristics of rolled materials. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of the heating equipment for rolled materials according to the present invention;

[0028] Figure 2This is a cross-sectional view of the heater structure used in the rolling mill heating equipment of the present invention;

[0029] Figure 3 This is a diagram of the heating equipment for rolled materials according to the present invention;

[0030] Reference numerals: 1. Water tank with frame; 2. Shell; 3. First reaction device; 4. Second reaction device; 5. Third reaction device; 6. Fourth reaction device; 7. Sensor; 8. Pump; 9. Hydraulic system; 10. Distributor; 11. Housing; 12. Point contactor; 13. Speed ​​sensor; 14. Current collector; 15. Electrolyte; 16. Bracket; 17. Bolt; 18. Metal anode; 19. Window; 20. Terminal; 21. Connecting pipe. Detailed Implementation

[0031] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0032] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0033] like Figures 1-3 As shown, this invention relates to a rolling mill heating device, including a framed water tank 1, a current collector 14 connected to the bottom of the framed water tank 1, a shell 2 arranged inside the framed water tank 1, and at least three independent reaction chamber devices with anodes arranged inside the shell 2; the reaction chamber devices are equipped with dispersion nozzles for uniformly distributing electrolyte 15; metal anodes 18 with through holes are used to supply the conductive medium—electrolyte 15—to the surface of the rolling mill; at the same time, in order to maintain the uniformity of the surface treatment and the safety of the process specifications, the device has a special device to fix the anodes and the workpiece being treated.

[0034] The rolled material is moved through several reaction chamber devices by specialized equipment to wind it into a coil. The equipment includes several independent reaction chamber devices with anodes, which have through holes and are connected to circuits with different voltages; the reaction chamber devices are independent of each other and connected to separate power supplies; electrolyte 15 is supplied to the independent reaction chamber devices via connecting pipes 21; the windows 19 of the reaction chamber devices are opened to form a long electrolyte pool filled with flowing electrolyte; the longitudinally moving rolled material is immersed in the electrolyte pool and passes through the windows 19 of all the reaction chamber devices in sequence.

[0035] The anode in the reaction chamber device at the outlet of the rolled material is connected to sensor 7, which is a non-contact temperature sensor connected to the thermal power control circuit. Sensor 7 is connected to the voltage control circuit of the output chamber to adjust and control the heating power of the rolled material according to the temperature of the rolled material.

[0036] The water tank 1 with a frame is equipped with a speed sensor 13 for the movement of the rolled material. The current collector 14 passes through the water tank 1 and is connected to the speed sensor 13. The speed sensor 13 is used to measure the speed of the rolled material to ensure safe operation when the speed of the rolled material is changed. The power is cut off when the speed is low.

[0037] Furthermore, the independent chamber in the rolling mill heating equipment is made of insulating material and contains a certain amount of flowing electrolyte 15. The electrolyte is constrained by a conductive anode, the surface of which is equidistant from the rolling mill processing surface. A hole is formed on the anode, with the hole axis pointing towards the processing surface, and a window 19 is formed at the top of the chamber for discharging steam and electrolyte.

[0038] The reaction chamber device at the feed inlet of the rolled material of the present invention is connected to the anode, and the maximum voltage of the connection circuit is 280-340V; the reaction chamber device connected to the anode after it has a maximum voltage of 200-240V.

[0039] A sensor 7 is located at the outlet of the chamber to measure the intensity and wavelength of the thermal radiation from the heated rolled material. The sensor's output signal is connected as a control signal to a circuit with a power control regulator, thereby controlling the anolyte current intensity in the reaction chamber at the outlet of the rolled material. The sensor transmits a feedback signal to the power regulator in the outlet chamber, enabling it to detect and regulate the temperature of the rolled material.

[0040] Ultimately, an optimal heating profile is established within each reaction chamber unit to ensure uniform heating of the rolled material cross-section. Sensor 7 at the output of the last chamber ensures monitoring and control of the rolled material temperature.

[0041] When the equipment is running, the cold-rolled material from the uncoiler is cleaned with a strong heating process in the first chamber. In the second and subsequent chambers, strong heating and moderate heating are alternated to make the temperature of the rolled material cross section uniform. In the last chamber, a controllable heating mode is used, and the heating process is controlled by a temperature sensor and a circuit power control program.

[0042] The heating equipment for rolled materials is symmetrical about the central axis of the rolled material being heated, see... Figure 1 The equipment includes: a water tank with a frame 1; a housing 2 made of insulating material; a reaction chamber device for heating the rolled material, including a first reaction device 3, a second reaction device 4, a third reaction device 5, and a fourth reaction device 6 arranged in sequence; a non-contact sensor 7 for measuring the temperature of the rolled material; a pump 8 for supplying electrolyte; a hydraulic system 9 for controlling the flow rate of electrolyte; an electrolyte distributor 10 for independent reaction chambers; a protective shell 11; a point contactor 12 for transmitting electrical energy; a rolled material movement speed sensor 13; and a grounding and vibration damping dry current collector 14 for the rolled material.

[0043] Figure 2 This is a cross-sectional view of the heater used in a rolling mill heating device. Electrolyte 15 is contained in a framed water tank 1. The reaction chamber is secured by a housing 2 made of insulating material, a support 16, and bolts 17. Point contactors 12 are mounted on the outside of the housing 2, connected to a distributor 10 via wires. A metal anode 18 is located within the reaction chamber. A window 19 is located at the center of the chamber. The anode is connected to a power source via a terminal 20, which is sealed by a housing 11. A pump 8 supplies electrolyte to an adjustable flow hydraulic system 9 and the distributor 10. Electrolyte is supplied to individual reaction chambers via connecting pipes 21. The windows of the chambers are open, forming long electrolyte pools filled with flowing electrolyte. The longitudinally moving rolled material is immersed in this electrolyte pool and passes through the windows of all the chambers in sequence.

[0044] Figure 3 This is an external view of a rolling mill cleaning and heating equipment used in metallurgical production. The unclean cold-rolled material is fed into the first chamber, which contains anodes connected to a 300V voltage. The rolled material then passes through five other chambers, where the voltage on the anodes is reduced to 180-220V to ensure uniform heating of the rolled material's cross-section. The last chamber exiting the equipment is the seventh chamber, whose anodes are connected to a sensor-controlled voltage conversion system to ensure accurate workpiece heating temperature.

[0045] The working principle of the rolling mill heating equipment is as follows:

[0046] Using existing winding and unwinding equipment, the rolled material is straightened and moved from one roll to another.

[0047] A key feature of this invention is that the rolling mill heating equipment operates in the following mode: the straightened rolled material is placed longitudinally along an electrolytic cell, which has reaction chambers with open windows. Electrolyte is supplied to each chamber, filling the electrolytic cell.

[0048] Each anode in the heating chamber is individually connected to a power supply. The anode voltage in the first reaction chamber is 280–340V. At this voltage, even if the surface of the rolled material is oxidized or contaminated, a plasma layer can form on it, cleaning and heating the rolled material at a heating rate of 200–500℃ / s. The anodes in subsequent chambers are connected to a lower voltage, 180–220V. At this voltage, a stable plasma layer can heat the rolled material at a rate of 50–150℃ / s. The lower heating rate ensures uniform heating across the entire cross-section of the rolled material and prevents surface overheating. The anode in the last chamber is connected to an adjustable power supply. The control signal comes from a temperature sensor at the outlet of the rolling material heating equipment. The sensor measures the surface temperature and controls the heating power of the last reaction chamber, making the workpiece heating at the equipment outlet more accurate.

[0049] A key feature of this invention is the presence of three or more independent reaction chambers, each connected to an independent power source. This ensures uniform heating of the rolled material without causing surface overheating.

[0050] The key features of this invention are: a speed sensor for measuring the movement of the rolled material, a sensor for measuring the temperature of the rolled material, and an automated system for controlling the heating power, which facilitates automated control of the heating process and eliminates factors that are detrimental to the heating process.

[0051] A rolling mill heating device also features an independent reaction chamber made of insulating material, containing a certain volume of flowing electrolyte confined by a conductive anode. Connecting the anode to a separate circuit minimizes energy loss in the heating electrolyte during energy transfer to the rolling mill. Reduced electrolyte loss is ensured by the important feature of an opening in the anode, with the opening axis pointing towards the center of the reaction chamber, where the heated rolling mill moves. Uniform heating of the rolling mill is ensured by the following features of the invention: the use of multiple chambers with anodes, each individually connected to a power source; and open windows at the top of all chambers forming an electrolyte pool in which the rolling mill is heated, the windows serving as outlets for steam and water electrolysis products.

[0052] The equipment also has the following important features: the anode surface is placed parallel to the longitudinal axis of the rolled material; the reaction chamber is fixed in a certain way so that its open window forms a flowing electrolyte pool. These features can significantly improve heating efficiency.

[0053] To improve heating quality and ensure operational safety, the equipment includes a sensor for measuring product speed, which is connected to a circuit controlling the current. The sensor only sends a heating current signal when the rolled material is moving at a specific speed, thus preventing overheating when the rolled material is stationary or moving at low speed.

[0054] This rolling stock heating equipment can be used in various industries, such as for heat treatment of rolled stock in metallurgy. The equipment ensures that the rolled stock is heated uniformly during its high-speed movement, preventing oxidation.

[0055] An embodiment of the rolling mill heating device of the present invention is as follows:

[0056] In the experiments, equipment with varying numbers of reaction chambers was used to heat the rolled material. The experiments showed that increasing the number of chambers to three or more ensured uniform heating of the rolled material moving at a speed of 30 m / s. To ensure efficient heating of the rolled material, the number of chambers needed to be increased. When the rolled material moved at high speeds (exceeding 60 m / s), the equipment required six or more chambers.

[0057] Schemes with different numbers of chambers and different anode placements were tested. The voltage was changed when the anode was energized in the reaction chamber.

[0058] Tests show that when the voltage of the anode in the first chamber is reduced to 180–220V, the chamber does not function and cannot provide high-quality heating. Applying 320V to the anode in the first chamber ensures efficient heating and surface cleaning of the rolled material. In subsequent chambers, with appropriate process heating, the voltage applied to the anode in each subsequent chamber is lower than before.

[0059] This patented equipment significantly improves the heating quality of rolled materials, reduces energy consumption, and increases productivity, as clearly shown in Table 1. Methods 6, 10, and 12 are the most optimized (see Table 1).

[0060] Table 1

[0061]

[0062] Even when the rolling mill's movement speed is less than 30 m / s, two reaction chambers are insufficient to achieve the required heating (see items 1 and 2 in Table 1). Increasing the number of chambers to four (see items 3, 4, and 5 in Table 1) allows the surface of the rolled material to be heated to 1200°C, but the heating of the rolled material cross-section is uneven. By adjusting the voltage of the last reaction chamber to control the heating power, the temperature of the rolled material surface can be reduced to 1000°C, ensuring uniform heating of the rolled material cross-section. Increasing the number of reaction chambers to seven allows for stable and uniform heating of the rolled material surface, even when the rolling mill's movement speed is as high as 60 m / s (see items 7-12 in Table 1). The 340V voltage in the first reaction chamber enables the formation of a stable plasma layer on the surface, thereby cleaning the surface and heating the surface of the cold-rolled material. Lower voltages of 180-200V are used in subsequent reaction chambers to ensure uniform heating of the workpiece cross-section. When the number of reaction chambers is 7, the controllable reaction chambers can accurately change the rolling temperature between 800℃ and 1000℃ (see items 11-12 in Table 1).

[0063] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention; therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0064] Although this document uses numerous reference numerals from the figures, such as: 1. Water tank with frame; 2. Housing; 3. First reaction device; 4. Second reaction device; 5. Third reaction device; 6. Fourth reaction device; 7. Sensor; 8. Pump; 9. Hydraulic system; 10. Distributor; 11. Housing; 12. Point contactor; 13. Speed ​​sensor; 14. Current collector; 15. Electrolyte; 16. Support; 17. Bolt; 18. Metal anode; 19. Window; 20. Terminal; 21. Connecting pipe, etc., the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of the invention; interpreting them as any additional limitation would contradict the spirit of the invention.

Claims

1. A rolling mill heating device, characterized in that: The device includes a framed water tank (1), with a current collector (14) connected to the bottom of the framed water tank (1). The framed water tank (1) is equipped with a shell (2) made of insulating material. The shell (2) is equipped with at least three independent reaction chamber devices with metal anodes. The reaction chamber devices are used to heat the rolled material. The reaction chamber devices are independent of each other and connected to separate power supplies. Electrolyte (15) is supplied to the independent reaction chamber devices via connecting pipes (21). The windows (19) of the reaction chamber devices are opened to form a long electrolyte pool filled with flowing electrolyte. The windows (19) are located at the center of the reaction chamber devices. The longitudinally moving rolled material is immersed in the long electrolyte pool. Each segment of the rolled material passes through the windows (19) of all the reaction chamber devices in sequence. The reaction chamber devices are reaction chambers with dispersing nozzles. The metal anode in the reaction chamber device at the outlet of the rolled material is connected to a non-contact temperature sensor (7) in the circuit. The non-contact temperature sensor (7) is located at the outlet of the last reaction chamber and is used to measure the temperature of the rolled material. The non-contact temperature sensor (7) is connected to the voltage automatic control system of the anode of the last reaction chamber, which ensures the increase or decrease of the heating power of the rolled material according to the temperature of the rolled material. A speed sensor (13) for measuring the rolling speed is installed inside the framed water tank (1) and at the entrance of the first reaction chamber. A current collector (14) passes through the framed water tank (1) and is connected to the speed sensor (13). The speed sensor (13) is used to measure the rolling speed to ensure safe operation when changing the rolling speed and to ensure power is cut off when running at low speed. The metal anode (18) is arranged inside the reaction chamber device; the metal anode (18) is switched with the power supply through the terminal (20), and the terminal (20) is sealed with the outer shell (11); The surface of the metal anode (18) is parallel to the axis of the rolled material; The voltage of the anode connection circuit in the reaction chamber device at the inlet of the rolled material is 280-340V, and the voltage of the anode connection circuit in the reaction chamber device in the middle is 180-220V.

2. The rolling mill heating device according to claim 1, characterized in that: It also includes a longitudinal movement unit and a winding unit for the rolled material.

3. The rolling mill heating device according to claim 1, characterized in that: The reaction chamber device is fixed to the housing (2) made of insulating material by a bracket (16) and bolts (17); a point contactor (12) is provided on the outside of the housing (2), and the point contactor (12) is connected to the distributor (10) by a wire.

4. The rolling mill heating device according to claim 1, characterized in that: It also includes a pump (8) for supplying electrolyte (15), the pump (8) delivering electrolyte (15) to an adjustable flow hydraulic system (9) and a distributor (10); the hydraulic system (9) is used to control the electrolyte flow rate, and the distributor (10) is used to control the electrolyte in the independent reaction chamber.

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