A double-melting-groove upward-drawing furnace

Abstract

This invention belongs to the technical field of cored induction furnaces, specifically relating to a dual-melting-channel furnace, comprising: a furnace body with a molten pool for containing molten copper; a feeding actuator for clamping an electrolytic copper plate and placing it into the molten pool; a fixed sensor assembly installed on the side of the furnace opening for measuring the static thickness of the charcoal layer during the feeding interval; and a movable sensor assembly installed on the feeding actuator. By adjusting the grippers to a preset tilt angle before clamping and then driving them back to the vertical direction after clamping, the electrolytic copper plate is tilted relative to the Z-axis vertical beam. During feeding, the electrolytic copper plate contacts the liquid surface first with its diagonal endpoint, achieving gradual feeding. This method reduces the initial discharge volume, decreases the fluctuation amplitude of the liquid surface, and reduces the risk of charcoal entrapment.

Description

Technical Field

[0001] This invention belongs to the technical field of cored power frequency induction furnaces, specifically relating to a dual-melting-channel furnace. Background Technology

[0002] Cored induction furnaces (especially those with double melting channels) are widely used in the continuous casting production of oxygen-free copper rods. During production, to prevent oxidation of the molten copper, a charcoal layer with a thickness of 80 to 120 mm needs to be placed on the surface of the molten copper. Electrolytic copper plates are fed into the furnace in batches for melting via an automatic feeder.

[0003] In the prior art, for example, Chinese invention patent CN119735005A discloses an automatic feeding machine for electrolytic copper plates, which includes a traveling mechanism, a clamping mechanism, a lifting mechanism, a suction cup mechanism, a sliding mechanism, and a flipping mechanism. This solution uses the clamping mechanism (fixed clamp and movable clamp) to hold the electrolytic copper plate, then the traveling mechanism transports the electrolytic copper plate to the top of the melting chamber of the induction furnace, and finally places it vertically downwards into the furnace. Figure 3 As shown in (a), the feeding method is a typical "clamping and vertical insertion": the electrolytic copper plate is kept vertical, the plate surface is perpendicular to the liquid surface, and the copper liquid is inserted vertically with the short side or long side as the contact side.

[0004] However, this vertical placement method has the following technical drawbacks: 1. It easily leads to violent disturbance of the liquid surface. The electrolytic copper plate directly impacts the surface of the molten copper with its surface or edge, instantly displacing a large volume of liquid and causing the liquid surface to sink. This easily traps charcoal particles and air deep into the molten copper, leading to oxygen absorption by the copper and charcoal inclusion. 2. When placed vertically, the electrolytic copper plate directly breaks through the charcoal layer, forming a large area of ​​exposed charcoal, damaging the integrity of the charcoal layer and the reducing atmosphere, accelerating the oxidation of the molten copper, and potentially causing localized burn-through of the charcoal layer. 3. Vertically placed electrolytic copper plates sink rapidly into the molten copper, causing a sudden drop in local temperature and reduced fluidity. This easily leads to the solidification of cold copper and the accumulation of impurities at the entrance of the molten channel, inducing blockage or even breakage of the molten channel. 4. Existing feeding machines can only feed according to a fixed trajectory and speed, and cannot adjust the feeding speed and angle in real time according to changes in the thickness of the charcoal layer. When the charcoal layer becomes thinner, it cannot slow down or change its posture, further exacerbating the above problems.

[0005] Furthermore, Chinese invention patent CN112063795A discloses a slag layer thickness measuring device and method, which measures the slag layer thickness in a metallurgical furnace using an air blowing rod and a laser probe. Although this solution involves thickness measurement, its measurement object is a high-temperature slag layer (such as an iron slag layer), and it uses an air blowing method to create pits, which is not suitable for the brittle charcoal layer in an upward-drawing furnace; at the same time, this device is independent of the charging system and cannot achieve dynamic feedback control during the charging process. Summary of the Invention

[0006] To address the aforementioned technical problems, this invention aims to provide an upward drawing furnace capable of real-time detection of the charcoal layer thickness and automatic adjustment of the feeding speed and the angle of the electrolytic copper plate feed based on changes in the charcoal layer thickness, thereby reducing liquid surface disturbance, preventing charcoal layer penetration, and reducing the risk of oxygen absorption by the molten copper.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A double-channel upward-drawing furnace, comprising: The furnace body has a molten pool for containing molten copper, and the bottom of the furnace body has a first molten groove and a second molten groove. The molten pool is covered with a layer of charcoal. A feeding actuator is used to clamp the electrolytic copper plate and place the electrolytic copper plate into the molten pool; A fixed sensor assembly is installed on the side of the furnace opening of the furnace body to measure the static thickness of the charcoal layer during the feeding interval; A mobile sensor assembly is installed on the feeding actuator to measure the dynamic thickness change of the charcoal layer in real time during the feeding process. The measurement point of the mobile sensor assembly is located on the surface of the charcoal layer outside the edge of the electrolytic copper plate. The controller is connected to the fixed sensor assembly, the movable sensor assembly, and the feeding actuator, respectively; the controller is used to determine the initial feeding speed and initial tilt angle of the feeding actuator based on the static thickness; the controller adjusts the feeding speed and / or tilt angle in real time according to the dynamic thickness change during the feeding process; The controller uses the thickness signals fed back by the fixed sensor assembly and the mobile sensor assembly to perform closed-loop control on the feeding speed and tilt angle of the feeding actuator, so that the thickness of the charcoal layer is maintained above a safe threshold during the feeding process.

[0008] The feeding actuator is mounted on the Z-axis vertical beam of the gantry manipulator; the feeding actuator includes a gripper, a hinge seat, and an adjusting cylinder; the gripper is hinged to the hinge seat, and a clamping cylinder is provided between the gripper and the hinge seat; the hinge seat is hinged to the Z-axis vertical beam, and the two ends of the adjusting cylinder are respectively hinged to the hinge seat and the Z-axis vertical beam.

[0009] Before clamping the electrolytic copper plate, the adjusting cylinder adjusts the jaws to a preset tilt angle, and the jaws clamp the electrolytic copper plate at this tilt angle; after clamping, the adjusting cylinder drives the jaws to rotate to the vertical direction, so that the clamped electrolytic copper plate is tilted relative to the Z-axis vertical beam.

[0010] The movable sensor assembly is located on the side of the hinge seat of the feeding actuator and is fixedly connected to the Z-axis vertical beam. The measurement direction of the movable sensor assembly is vertically downward.

[0011] The fixed sensor assembly is installed on an independent column on the ground or on the truss column of the truss robot; the fixed sensor assembly is installed at a downward angle of 30° to 60° toward the charcoal layer inside the furnace opening.

[0012] The fixed sensor assembly includes a laser rangefinder and an infrared thermal imager; The laser rangefinder is used to measure the vertical distance from the upper surface of the charcoal layer to a fixed reference surface; The infrared thermal imager is used to collect the temperature distribution on the surface of the charcoal layer, and to calculate the thickness distribution of the charcoal layer based on the temperature distribution and the known temperature of the molten copper. The controller calibrates the thickness distribution calculated by the infrared thermal imager based on the vertical distance measured by the laser rangefinder to obtain the static thickness.

[0013] It also includes a molten groove power compensation module, which is connected to the power controller of the first molten groove, the power controller of the second molten groove, and the controller. The molten groove power compensation module is used to send a power adjustment command to the power controller in advance according to the change in charcoal layer thickness issued by the controller. When the charcoal layer thickness decreases, the input power of the first molten groove and / or the second molten groove is increased to compensate for the increased heat loss.

[0014] The fixed sensor assembly is installed on a one-dimensional or two-dimensional electric slide. The controller is electrically connected to the electric slide and controls the movement of the electric slide, so that the fixed sensor assembly can perform multi-point scanning of the furnace opening and generate a thickness distribution cloud map of the charcoal layer.

[0015] The furnace opening is provided with a furnace cover and a furnace cover opening and closing mechanism; the furnace cover is slidably connected to the furnace opening; the furnace cover is driven to slide by the furnace cover opening and closing mechanism.

[0016] The furnace cover opening and closing mechanism includes a support frame, a drive rod, and a drive cylinder; the support frame is fixedly installed at the furnace opening, and the drive rod is rotatably connected to the support frame; an active rod is fixedly connected to the end of the drive rod, and the two ends of the drive cylinder are respectively hinged to the active rod and the furnace body; a push rod is fixedly connected to the drive rod, and the push rod is connected to the furnace cover by a pull rod.

[0017] Compared with the prior art, the beneficial effects of this invention are: In existing technologies, electrolytic copper plates are placed vertically, with the entire plate surface or long side directly impacting the liquid surface. This results in a large instantaneous discharge volume, easily causing severe dents and splashing. By adjusting the grippers to a preset tilt angle before clamping and then driving them back to the vertical direction after clamping, the electrolytic copper plate is tilted relative to the Z-axis vertical beam. During feeding, the electrolytic copper plate's diagonal endpoint (sharp corner) contacts the liquid surface first, achieving gradual feeding. This method reduces the initial discharge volume, decreases the amplitude of liquid surface fluctuations, and reduces the risk of charcoal entrapment.

[0018] When feeding at an angle, the electrolytic copper plate is only partially opened through a narrow gap, while the charcoal layer remains intact. After feeding, it can naturally fall back to cover the charcoal layer, avoiding the large-area exposure and burn-through of the charcoal layer that occurs when feeding vertically. The angled feeding effectively extends the preheating time between the electrolytic copper plate and the molten copper, resulting in a gentler temperature gradient upon molten copper entry. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of Embodiment 1 of the present invention; Figure 2 This is a schematic diagram showing the installation positions of the fixed sensor assembly and the mobile sensor assembly in Embodiment 1 of the present invention; Figure 3 (a) is a schematic diagram of the existing electrolytic copper plate placed vertically; Figure 3 (b) is a schematic diagram of the electrolytic copper plate of the present invention being placed at an angle; Figure 4 (a) is a schematic diagram of the gripper state before feeding according to the present invention; Figure 4 (b) is a schematic diagram of the gripper state after the clamping is completed according to the present invention; Figure 5 This is a schematic diagram of the connection structure between the feeding actuator and the gantry robot in Embodiment 1 of the present invention; Figure 6 yes Figure 5 A magnified view of a section at point A in the middle; Figure 7 This is a schematic diagram of the dynamic thickness of the charcoal layer in Embodiment 1 of the present invention; Figure 8 This is a schematic diagram of Embodiment 2 of the present invention; Figure 9 This is a schematic diagram of Embodiment 3 of the present invention; Figure 10 This is a schematic diagram of the structure of Embodiment 4 of the present invention; Figure 11 yes Figure 10 A magnified view of a section at point B in the middle; Wherein: 1 is the furnace body, 2 is the first melting groove, 3 is the second melting groove, 4 is the charcoal layer, 5 is the feeding actuator, 50 is the gripper, 51 is the hinge seat, 52 is the adjusting cylinder, 53 is the clamping cylinder, 6 is the fixed sensor assembly, 60 is the laser rangefinder, 61 is the infrared thermal imager, 7 is the mobile sensor assembly, 8 is the controller, 9 is the gantry robot, 90 is the Z-axis vertical beam, 10 is the electrolytic copper plate, 11 is the melting groove power compensation module, 12 is the furnace cover, 13 is the furnace cover opening and closing mechanism, 130 is the support frame, 131 is the drive rod, 132 is the drive cylinder, 133 is the active rod, 134 is the push rod, 135 is the pull rod, and 14 is the electric slide. Detailed Implementation

[0020] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0021] Example 1

[0022] like Figure 1 As shown, a dual-melting-channel upward-drawing furnace includes a furnace body 1, a feeding actuator 5, a fixed sensor assembly 6, a movable sensor assembly 7, and a controller 8.

[0023] The furnace body 1 has an internal molten pool for holding molten copper. The bottom of the furnace body 1 has a first molten groove 2 and a second molten groove 3 for induction heating of the molten copper. That is, the first molten groove 2 and the second molten groove 3 are heating molten grooves; a heat-insulating molten groove may also be provided at the bottom.

[0024] A charcoal layer 4 covers the molten pool, and the thickness of the charcoal layer 4 is usually controlled between 80mm and 120mm. The charcoal layer 4 is composed of block charcoal, which can isolate air and play a role in heat preservation.

[0025] The feeding actuator 5 is mounted on the Z-axis vertical beam 90 of the gantry robot 9; the gantry robot 9 is a common existing structure, so it will not be discussed here. The feeding actuator 5 is used to clamp the electrolytic copper plate 10 and place the electrolytic copper plate 10 into the molten pool, and can control the angle of the electrolytic copper plate 10.

[0026] Specifically, such as Figure 2 , Figure 5 and Figure 6As shown, the feeding actuator 5 includes a gripper 50, a hinge seat 51, and an adjusting cylinder 52. The gripper 50 is hinged to the hinge seat 51, and a clamping cylinder 53 is provided between the gripper 50 and the hinge seat 51. The two ends of the clamping cylinder 53 are respectively hinged to the gripper 50 and the hinge seat 51. The rotation of the gripper 50 is achieved by the extension and retraction of the piston rod of the clamping cylinder 53, thereby clamping or releasing the electrolytic copper plate 10. The hinge seat 51 is hinged to the Z-axis vertical beam 90, and the two ends of the adjusting cylinder 52 are respectively hinged to the hinge seat 51 and the Z-axis vertical beam 90. The tilt angle of the hinge seat 51 and the gripper 50 can be changed by the extension and retraction of the piston rod of the adjusting cylinder 52.

[0027] like Figure 4 As shown in (a), before feeding, the adjusting cylinder 52 adjusts the gripper 50 to a preset tilt angle (e.g., 30°, 45°), at which the gripper 50 holds the electrolytic copper plate 10. Figure 4 As shown in (b), after clamping is completed, the adjusting cylinder 52 drives the gripper 50 to rotate to the vertical direction. At this time, the clamped electrolytic copper plate 10 is tilted relative to the Z-axis vertical beam 90. Figure 3 As shown in (b), the electrolytic copper plate 10 can contact the surface of the molten copper with its edge first when it is fed in, thereby reducing the impact on the liquid surface.

[0028] like Figure 2 As shown, the fixed sensor assembly 6 is installed on the side of the furnace opening of the furnace body 1. As a preferred installation method, the fixed sensor assembly 6 is installed on a freestanding column on the ground. This column is separate from the gantry robot 9 to avoid vibrations caused by the robot's movement affecting measurement accuracy.

[0029] The fixed sensor assembly 6 includes a laser rangefinder 60 and an infrared thermal imager 61. The laser rangefinder 60 is used to directly measure the distance from the upper surface of the charcoal layer 4 to a reference surface (e.g., a reference point on the edge of the furnace or a column). The infrared thermal imager 61 is used to estimate the thickness of the charcoal layer 4 through temperature gradients: since the temperature of the molten copper below the charcoal layer 4 (approximately 1140-1150℃) is much higher than the surface temperature of the charcoal layer 4, the thickness of the charcoal layer 4 can be estimated by acquiring the temperature distribution on the surface of the charcoal layer 4 through the infrared thermal imager 61 and combining it with a heat transfer model.

[0030] The controller 8 fuses the measurement results from the laser rangefinder 60 and the infrared thermal imager 61 to obtain a static thickness value. Specifically, the laser rangefinder 60 measures the vertical distance from the upper surface of the charcoal layer 4 to a preset fixed reference surface on the furnace body (e.g., the upper edge of the furnace opening); simultaneously, the infrared thermal imager 61 acquires the temperature distribution on the surface of the charcoal layer 4 and calculates the thickness distribution cloud map of the charcoal layer 4 based on the copper melt temperature (approximately 1140-1150℃) and a pre-calibrated heat transfer model. Using the measurement value from the laser rangefinder 60 as a reference, the controller 8 calculates the deviation between the infrared-calculated thickness and the laser-measured thickness at the measurement point, and uses this deviation to correct the entire infrared thickness cloud map, obtaining a calibrated thickness distribution of the charcoal layer 4. The controller 8 extracts the average thickness of key areas near the furnace opening, such as the feeding point, as the static thickness value.

[0031] During measurement, the fixed sensor assembly 6 illuminates the charcoal layer 4 inside the furnace opening at a 45° downward angle, with the measurement point located at the center of the furnace opening, slightly off-center from the feeding side. The fixed sensor assembly 6 operates only during the feeding interval, i.e., when the furnace opening is unobstructed and the copper molten surface is calm, and is used to obtain the absolute thickness reference of the charcoal layer 4.

[0032] The absolute thickness reference consists of two parts: one is the vertical distance D from a pre-calibrated fixed reference surface to the surface of the stationary copper liquid. ref Secondly, the reference thickness of the charcoal layer is H, which is the vertical distance d from the upper surface of the charcoal layer to the fixed reference surface, measured in real time by the laser rangefinder 60. ref =D ref -d. This reference thickness is used to calibrate the extrapolation results of the infrared thermal imager 61 to eliminate model errors and environmental interference.

[0033] like Figure 2 As shown, the movable sensor assembly 7 is located on the side of the hinge seat 51 of the feeding actuator 5 and is fixedly connected to the Z-axis vertical beam 90. Specifically, the measurement direction of the movable sensor assembly 7 is vertically downward. The measurement point of the movable sensor assembly 7 is located on the surface of the charcoal layer 4 on the outer edge of the electrolytic copper plate 10. In this way, the sensor's line of sight will not be obstructed when the electrolytic copper plate 10 descends during the feeding process.

[0034] The movable sensor assembly 7 preferably employs a laser displacement sensor to measure in real time the vertical distance d from itself to the upper surface of the charcoal layer 4. (t) Simultaneously, the controller 8 obtains real-time position feedback of the Z-axis vertical beam 90 through the servo system of the feeding actuator 5, thereby calculating the real-time distance L from the fixed reference surface (e.g., the upper edge of the furnace opening) to the movable sensor assembly 7. s(t) The vertical distance D from the fixed reference plane to the surface of the stationary molten copper. ref These are known constants that are pre-calibrated during equipment installation.

[0035] like Figure 7 As shown, controller 8 calculates the dynamic thickness H of charcoal layer 4 in real time according to the following formula. (t) : H (t) =D ref +L s(t) -d (t)； The controller 8 obtains the real-time thickness change of the charcoal layer 4 during the feeding process, and uses it to adjust the feeding speed of the feeding actuator 5 in a closed loop.

[0036] The controller 8 is electrically connected to the fixed sensor assembly 6, the movable sensor assembly 7, the adjusting cylinder 52, the drive motor of the Z-axis vertical beam 90, and the power controllers of the first melting groove 2 and the second melting groove 3. The controller 8 has a pre-set thickness grading table, which stores the correspondence between static thickness and initial feeding speed and initial tilt angle.

[0037] During the feeding process, the controller 8 dynamically adjusts the feeding speed based on the real-time feedback of the charcoal layer 4 thickness H and its rate of change from the moving sensor component 7. The dynamic adjustment rules are as follows: the larger the real-time charcoal layer 4 thickness relative to the preset target thickness (e.g., 100mm), the faster the feeding speed; the smaller the real-time charcoal layer 4 thickness relative to the preset target thickness, the slower the feeding speed; and the greater the rate of decrease in the real-time charcoal layer 4 thickness, the greater the decrease in the feeding speed. When the real-time charcoal layer 4 thickness is less than 60mm, the controller 8 immediately stops feeding and issues an alarm.

[0038] Through the dual closed-loop adjustment of speed and angle, the thickness of charcoal layer 4 during the feeding process is always not lower than the safety threshold (60mm), thereby effectively preventing charcoal layer 4 from being penetrated and avoiding oxygen absorption by copper liquid and blockage of the molten channel.

[0039] Example 2

[0040] Based on Example 1, this example adds the following settings: like Figure 8 As shown, it also includes a molten groove power compensation module 11, which is electrically connected to the power controller of the first molten groove 2, the power controller of the second molten groove 3, and the controller 8. The thickness of the charcoal layer 4 affects the heat loss at the furnace opening: when the charcoal layer 4 becomes thinner, the heat loss increases, and the input power of the molten groove needs to be increased to maintain the stability of the copper liquid temperature; conversely, when the charcoal layer 4 becomes thicker, the power can be appropriately reduced to save energy.

[0041] The molten channel power compensation module 11 sends a power adjustment command to the power controller in advance based on the charcoal layer 4 thickness change signal sent by the controller 8. This power adjustment command is a feedforward control command: when the controller 8 decides to increase the feeding speed (meaning that more cold material will enter the furnace in the near future, and the charcoal layer 4 may be further damaged during the feeding process), the molten channel power compensation module 11 sends a command to the power controller to increase the power by 5% to 10% 2 seconds before the feeding actuator 5 starts to speed up. In this way, the molten channel has already increased its output power before the feeding impact arrives, which can effectively suppress the drop in copper liquid temperature and ensure the stability of the upward casting.

[0042] Example 3

[0043] like Figure 9 As shown, based on Embodiment 1, in this embodiment, the fixed sensor assembly 6 is mounted on a one-dimensional electric slide 14, which can be constructed using existing technologies. Specifically, the electric slide 14 is fixed to the column of the gantry robot 9, and the movement direction of the electric slide 14 is parallel to the length direction of the furnace opening. The controller 8 is electrically connected to the electric slide 14 and controls its movement, enabling the fixed sensor assembly 6 to scan and measure multiple points along the furnace opening direction. The controller 8 integrates the measurement results from each point to generate a thickness distribution cloud map of the charcoal layer 4.

[0044] As an alternative, the motorized slide 14 can also be two-dimensional, enabling the sensor to move both horizontally and vertically for more precise scanning.

[0045] Example 4

[0046] Based on Example 1, this example provides a specific furnace cover opening and closing mechanism 13. The furnace cover opening and closing mechanism 13 is mainly used to open and close the furnace cover 12, blocking or exposing the furnace opening.

[0047] like Figure 10 and 11 As shown, a furnace cover 12 and a furnace cover opening and closing mechanism 13 are provided at the furnace opening, and the furnace cover 12 is slidably connected to the furnace opening; the furnace cover opening and closing mechanism 13 and the furnace cover 12 form a crank-slider mechanism, specifically with the following structural configuration: The furnace cover opening and closing mechanism 13 includes a support frame 130, a drive rod 131, and a drive cylinder 132. The support frame 130 is fixedly installed at the furnace opening, and the drive rod 131 is rotatably connected to the support frame 130. An active rod 133 is fixedly connected to the end of the drive rod 131, and both ends of the drive cylinder 132 are hinged to the active rod 133 and the furnace body 1, respectively. A push rod 134 is fixedly connected to the drive rod 131, and the push rod 134 is connected to the furnace cover 12 via a pull rod 135. Both ends of the pull rod 135 are hinged to the push rod 134 and the furnace cover 12, respectively. When the piston rod of the drive cylinder 132 extends or retracts, it drives the drive rod 131 to rotate via the active rod 133. After the drive rod 131 rotates, it drives the furnace cover 12 to slide along the furnace opening via the push rod 134 and the pull rod 135, thus achieving opening and closing.

[0048] Example 5

[0049] This embodiment provides a feeding control method for a double-melting-channel upward-drawing furnace.

[0050] First, during the feeding interval (after the previous feeding is completed and the liquid level returns to calm), the fixed sensor assembly 6 initiates static measurement. The laser rangefinder 60 measures the distance from the upper surface of the charcoal layer 4 to the reference surface, the infrared thermal imager 61 collects the temperature distribution on the surface of the charcoal layer 4, and the controller 8 fuses the two data to obtain the static thickness.

[0051] Controller 8 queries the corresponding initial feeding speed and initial tilt angle according to the thickness grading table. If the thickness is less than 60mm, controller 8 issues a pause feeding command and triggers a carbon replenishment alarm, waiting for manual carbon replenishment before continuing; if the thickness is greater than or equal to 60mm, the feeding process begins.

[0052] The feeding actuator 5 begins operation: the adjusting cylinder 52 first adjusts the gripper 50 to an inclined angle, at which the gripper 50 clamps the electrolytic copper plate 10; after clamping, the adjusting cylinder 52 drives the gripper 50 to rotate to the vertical direction, so that the electrolytic copper plate 10 is inclined relative to the Z-axis vertical beam 90. Then, the Z-axis vertical beam 90 drives the gripper 50 and the electrolytic copper plate 10 to descend, moving towards the furnace opening at an initial speed.

[0053] During the descent of the electrolytic copper plate 10, the movable sensor assembly 7 measures the surface height of the charcoal layer 4 on the outer edge of the electrolytic copper plate 10 in real time in a vertically downward direction. The controller 8 calculates the real-time thickness of the charcoal layer 4 and its changes based on the static thickness reference measured by the fixed sensor assembly 6 and the real-time reading of the movable sensor assembly 7, combined with the position feedback of the feeding actuator 5 (i.e., the real-time height of the Z-axis vertical beam).

[0054] The controller 8 dynamically adjusts the feeding speed according to preset rules: if the thickness of the charcoal layer 4 is greater than the target thickness, the speed is increased appropriately; if the thickness of the charcoal layer 4 is less than the target thickness, the speed is decreased appropriately.

[0055] After feeding is completed, the Z-axis vertical beam 90 drives the gripper 50 to rise and reset. The fixed sensor assembly 6 measures the static thickness of the charcoal layer 4 again and compares it with the thickness before feeding to obtain the change in the charcoal layer 4 caused by this feeding. The controller 8 records this change for parameter correction in the next feeding.

[0056] Throughout the feeding process, the molten trough power compensation module 11 sends power adjustment commands to the power controllers of the first molten trough 2 and the second molten trough 3 in advance, based on the change rate of the charcoal layer 4 thickness and the changing trend of the feeding speed, to ensure the stability of the copper liquid temperature.

[0057] The above description only illustrates preferred embodiments of the present invention, but the present invention is not limited to the above embodiments.

Claims

1. A double-melting-channel upward-drawing furnace, characterized in that: include: Furnace body (1), the furnace body (1) is provided with a molten pool for containing copper liquid, the bottom of the furnace body (1) is provided with a first molten groove (2) and a second molten groove (3), and the molten pool is covered with a charcoal layer (4). The feeding actuator (5) is used to clamp the electrolytic copper plate (10) and place the electrolytic copper plate (10) into the molten pool; A fixed sensor assembly (6) is installed on the side of the furnace opening of the furnace body (1) for measuring the static thickness of the charcoal layer (4) during the feeding gap; A mobile sensor assembly (7) is installed on the feeding actuator (5) to measure the dynamic thickness change of the charcoal layer (4) in real time during the feeding process. The measurement point of the mobile sensor assembly (7) is located on the surface of the charcoal layer (4) outside the edge of the electrolytic copper plate (10). The controller (8) is connected to the fixed sensor assembly (6), the mobile sensor assembly (7) and the feeding actuator (5) respectively; the controller (8) is used to determine the initial feeding speed and initial tilt angle of the feeding actuator (5) according to the static thickness; the controller (8) adjusts the feeding speed and / or tilt angle in real time according to the dynamic thickness change during the feeding process; The controller (8) controls the feeding speed and tilt angle of the feeding actuator (5) in a closed loop based on the thickness signals fed back by the fixed sensor assembly (6) and the mobile sensor assembly (7) so that the thickness of the charcoal layer (4) is maintained above the safety threshold during the feeding process.

2. The double-melting-channel upward-drawing furnace according to claim 1, characterized in that: The feeding actuator (5) is mounted on the Z-axis vertical beam (90) of the gantry manipulator (9); the feeding actuator (5) includes a gripper (50), a hinge seat (51) and an adjusting cylinder (52); the gripper (50) is hinged to the hinge seat (51), and a clamping cylinder (53) is provided between the gripper (50) and the hinge seat (51); the hinge seat (51) is hinged to the Z-axis vertical beam (90), and the two ends of the adjusting cylinder (52) are respectively hinged to the hinge seat (51) and the Z-axis vertical beam (90).

3. The double-melting-channel upward-drawing furnace according to claim 2, characterized in that: Before clamping the electrolytic copper plate (10), the adjusting cylinder (52) adjusts the jaw (50) to a preset tilt angle, and the jaw (50) clamps the electrolytic copper plate (10) at this tilt angle; after clamping, the adjusting cylinder (52) drives the jaw (50) to rotate to the vertical direction, so that the clamped electrolytic copper plate (10) is tilted relative to the Z-axis vertical beam (90).

4. A double-melting-channel upward-drawing furnace according to claim 3, characterized in that: The movable sensor assembly (7) is located on the side of the hinge seat (51) of the feeding actuator (5) and is fixedly connected to the Z-axis vertical beam (90). The measurement direction of the movable sensor assembly (7) is vertically downward.

5. A double-melting-channel upward-drawing furnace according to claim 2, characterized in that: The fixed sensor assembly (6) is installed on an independent column on the ground or on the truss column of the truss manipulator (9); the fixed sensor assembly (6) is installed at a downward angle of 30° to 60° toward the charcoal layer (4) inside the furnace opening.

6. The double-melting-channel upward-drawing furnace according to claim 5, characterized in that: The fixed sensor assembly (6) includes a laser rangefinder (60) and an infrared thermal imager (61). The laser rangefinder (60) is used to measure the vertical distance from the upper surface of the charcoal layer (4) to a fixed reference surface; The infrared thermal imager (61) is used to collect the temperature distribution on the surface of the charcoal layer (4) and calculate the thickness distribution of the charcoal layer (4) based on the temperature distribution and the known copper liquid temperature. The controller (8) calibrates the thickness distribution calculated by the infrared thermal imager (61) based on the vertical distance measured by the laser rangefinder (60) to obtain the static thickness.

7. A double-melting-channel upward-drawing furnace according to claim 1, characterized in that: It also includes a molten groove power compensation module (11), which is connected to the power controller of the first molten groove (2), the power controller of the second molten groove (3) and the controller (8). The molten groove power compensation module (11) is used to send a power adjustment command to the power controller in advance according to the change in the thickness of the charcoal layer (4) issued by the controller (8). When the thickness of the charcoal layer (4) decreases, the input power of the first molten groove (2) and / or the second molten groove (3) is increased to compensate for the increased heat loss.

8. A double-melting-channel upward-drawing furnace according to claim 1, characterized in that: The fixed sensor assembly (6) is installed on a one-dimensional or two-dimensional electric slide (14). The controller (8) is electrically connected to the electric slide (14) and controls the movement of the electric slide (14) so ​​that the fixed sensor assembly (6) performs multi-point scanning of the furnace opening and generates a thickness distribution cloud map of the charcoal layer (4).

9. A double-melting-channel upward-drawing furnace according to claim 1, characterized in that: The furnace opening is provided with a furnace cover (12) and a furnace cover opening and closing mechanism (13); the furnace cover (12) is slidably connected to the furnace opening; the furnace cover (12) is driven to slide by the furnace cover opening and closing mechanism (13).

10. A double-melting-channel upward-drawing furnace according to claim 9, characterized in that: The furnace cover opening and closing mechanism (13) includes a support frame (130), a drive rod (131), and a drive cylinder (132); the support frame (130) is fixedly installed at the furnace opening, and the drive rod (131) is rotatably connected to the support frame (130); the end of the drive rod (131) is fixedly connected to an active rod (133), and the two ends of the drive cylinder (132) are respectively hinged to the active rod (133) and the furnace body (1); a push rod (134) is fixedly connected to the drive rod (131), and the push rod (134) is connected to the furnace cover (12) by a pull rod (135).

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