A flux recovery system

Abstract

The utility model belongs to flux technical field especially relates to flux recovery system, sets up gantry on one side of conveying device, including flux feed assembly, welding torch and recovery device, and recovery device includes vacuum pump, recovery tank and recovery pipe, the gantry top side is sequentially provided with flux feed assembly, welding torch and recovery pipe, and the gantran still is equipped with support platform, recovery tank is located on the support platform, and recovery tank is connected vacuum pump through dust removal subassembly, and dust removal subassembly includes ventilation pipe, and ventilation pipe stretches into inside from the top of recovery tank, the bottom of recovery pipe is equipped with suction nozzle, and the top end passes through recovery tank side wall and stretches into inside, the inside of recovery tank below ventilation pipe is sequentially equipped with first vibratory screen, magnetic separator and second vibratory screen, second vibratory screen is obliquely arranged in recovery tank, and the lower end of second vibratory screen is equipped with discharge gate, and discharge gate is connected with storage hopper, and storage hopper is connected with flux feed assembly through feed pipe. The system improves the purity of flux through secondary screening and magnetic metal impurities.

Description

Technical Field

[0001] This utility model belongs to the field of flux recovery technology, and in particular relates to a flux recovery system. Background Technology

[0002] Submerged arc welding is a highly efficient automated welding method. Its key feature is that during the welding process, a large amount of flux is spread in front of the electric arc, playing a crucial role in isolating air, stabilizing the arc, and improving weld formation. Theoretically, after welding, approximately 50% to 90% of the flux remains unmelted and can be recycled and reused.

[0003] Traditional flux recycling relies primarily on manual methods. Operators must wait for the weld area to cool before manually sweeping and collecting the flux mixture, which contains slag, dust, and iron filings, using tools such as brooms and shovels. This mixture is then preliminarily filtered through a manual sieve before being reused. However, during the sweeping process, flux located at the edges of the workpiece easily spills off the work platform, resulting in unrecoverable waste. Furthermore, manual sieving and recycling is inefficient, requiring interruptions to welding operations and increasing production costs.

[0004] Automated flux recovery equipment with collection and processing functions has appeared on the market. Chinese patent document CN209453013U discloses a submerged arc welding machine flux recovery system, including a vibrating screen, an elevator, a large motor, a small motor, and a reducer. The vibrating screen is placed below the welding torch, with its discharge end positioned directly above the elevator's inlet. The elevator's discharge outlet is positioned directly above the submerged arc welding machine's hopper. The vibrating screen filters used flux, and unused flux falls into the elevator through the distribution port, ultimately being returned to the welding machine's hopper for recycling.

[0005] As can be seen from the technical solution in the aforementioned patent document, combined with the accompanying drawings, impurities such as fine powder and iron filings, due to their small particle size, easily pass through the vibrating screen along with the unused flux and fall into the polished plate, and then re-enter the welding hopper via the elevator. If these impurities are mixed into the welding area, they can easily lead to defects such as porosity and slag inclusions in the weld, seriously affecting the welding quality; at the same time, the dust generated during the screening process is easily dispersed in the working environment, posing a threat to the health of the operators. Utility Model Content

[0006] The purpose of this utility model is to provide a flux recovery system to solve the problems of existing flux recovery equipment having a single screening and processing function, which easily allows fine powder and iron filings to re-enter the welding hopper with the flux, resulting in defects such as porosity and slag inclusions in the weld and affecting the welding quality; and the problem that dust is easily dispersed in the working environment, endangering the health of operators.

[0007] To achieve the above objectives, this utility model provides a flux recovery system mounted on a gantry frame on one side of a conveying device. The conveying device is used to carry and transport workpieces to be welded. It includes a flux supply assembly, a welding torch, and a recovery device. The recovery device includes a vacuum pump, a recovery tank, and a recovery pipe. The flux supply assembly, welding torch, and recovery pipe are sequentially arranged on the gantry frame along the conveying direction of the conveying device. A support platform is provided on the side of the gantry frame away from the conveying device. The recovery tank is located on the support platform. One side of the recovery tank is connected to the vacuum pump via a dust removal assembly. The dust removal assembly includes a ventilation pipe, which extends from the recovery tank. The top of the tube extends into the interior; the bottom of the recycling tube is equipped with a suction nozzle, and the top of the tube passes through the side wall of the recycling box and extends into the interior. The top opening of the recycling tube faces the side wall of the ventilation tube and is higher than the bottom of the ventilation tube. Inside the recycling box below the ventilation tube, a first vibrating screen, a magnetic separator, and a second vibrating screen are arranged sequentially along the material falling direction. The screen aperture of the first vibrating screen is larger than that of the second vibrating screen. The second vibrating screen is inclined inside the recycling box. The lower end of the second vibrating screen is connected to the inner wall of the recycling box with a discharge port. The discharge port is connected to a storage hopper. The storage hopper is connected to the flux supply assembly through a conveying pipe.

[0008] Furthermore, a sealing cover plate for opening and closing the discharge port is rotatably installed on the outer side of the discharge port.

[0009] Furthermore, the first vibrating screen is inclined inside the recycling box, and its inclination direction is the same as that of the second vibrating screen. A slag discharge port is provided at the connection between the lower end of the first vibrating screen and the inner wall of the recycling box, and the slag discharge port is connected to a waste box for collecting welding slag.

[0010] Furthermore, a sealing baffle for opening and closing the slag discharge port is rotatably installed on the outer side of the slag discharge port.

[0011] Furthermore, the magnetic separator is located below the higher end of the first vibrating screen, and a guide plate is provided above the feed end of the magnetic separator. The upper end of the guide plate is connected to the inner wall of the recycling box, and the lower end extends to the feed end of the magnetic separator. The discharge end of the magnetic separator is located above the higher end of the second vibrating screen.

[0012] Furthermore, the dust removal assembly includes a dust removal box, a filter layer is provided inside the dust removal box, one end of the ventilation pipe extends into the dust removal box and its opening is located below the filter layer, and an air outlet is provided at the top of the dust removal box, the air outlet being connected to the vacuum pump through a pipe.

[0013] Furthermore, the top of the dust collection box is also provided with a shaking component, which includes a cylinder and a push rod. The push rod extends downward into the dust collection box and is connected to the filter layer. The cylinder is connected to the push rod and is used to drive the push rod to move up and down reciprocally.

[0014] Furthermore, the bottom of the dust collection box is provided with a dust outlet, and a discharge valve is installed at the dust outlet.

[0015] Furthermore, the flux feeding assembly includes a feeding hopper and a discharge pipe. The top inlet of the feeding hopper is connected to the storage hopper through the discharge pipe, and the bottom of the feeding hopper is provided with a discharge port, which is connected to the discharge pipe. A negative pressure pump is connected to the feeding hopper.

[0016] Furthermore, the discharge port is also equipped with a discharge valve.

[0017] The flux recovery system provided in this embodiment of the present invention has at least the following technical effects: The conveyor drives the workpiece to one side of the gantry, where it passes sequentially through the flux supply assembly, welding torch, and recovery pipe. The flux supply assembly continuously applies flux to the welding area of ​​the workpiece. As the workpiece continues to move, the welding torch performs submerged arc welding on the weld. After the molten pool from the submerged arc welding solidifies, the vacuum pump starts, and the recovery device sucks the used flux from the workpiece surface into the recovery box via a suction nozzle. The flux is separated and purified in the recovery box to form clean flux, which then falls into a storage hopper for temporary storage. The clean flux in the storage hopper flows back to the flux supply assembly through a conveyor pipe, resupplying it to the welding area of ​​the workpiece. This forms an automated cycle of feeding, welding, recovery, purification, and refeeding, effectively recycling and reusing the flux. This significantly reduces the amount of new flux required, lowers production costs, and avoids the spillage of flux from the platform edges caused by traditional manual recovery, reducing waste of existing flux and aligning with the environmental principles of green manufacturing and sustainable development.

[0018] The flux entering the recycling bin first collides with the inner wall and the side wall of the ventilation duct, breaking up any agglomerated slag and flux, facilitating subsequent screening. Then, a first vibrating screen intercepts large particles of slag, a magnetic separator effectively adsorbs metal impurities such as iron filings, and a second vibrating screen filters out fine dust and debris, improving the purity of the recycled flux. Finally, the flux, after being screened and purified to the required particle size and cleanliness, enters the storage hopper from the outlet, returns to the flux supply assembly via a conveying pipe, and is then returned to the welding process. This qualified flux effectively prevents defects such as porosity and slag inclusions in the weld, ensuring stable and reliable welding quality.

[0019] By using a vacuum pump to recover flux under closed negative pressure, the system effectively removes flux during the welding process, controlling dust in the welding area, maintaining a clean workplace, and benefiting the health of operators. The fully automated recovery system allows for continuous and efficient welding, making it particularly suitable for long welds and automated welding production lines, significantly improving overall production efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A structural diagram of the flux recovery system provided in an embodiment of this utility model.

[0022] Figure 2 A cross-sectional view of the recovery box and storage hopper of the flux recovery system provided in this embodiment of the utility model.

[0023] Figure 3 A cross-sectional view of the dust removal component of the flux recovery system provided in an embodiment of this utility model.

[0024] In the diagram, 100 is the recycling bin, 110 is the recycling pipe, 111 is the suction nozzle, 120 is the first vibrating screen, 121 is the slag discharge port, 122 is the baffle, 130 is the magnetic separator, 131 is the guide plate, 140 is the second vibrating screen, 141 is the discharge port, 142 is the cover plate, 150 is the storage hopper, 151 is the conveying pipe, and 160 is the waste bin. 200. Vacuum pump; 210. Dust collection assembly; 211. Ventilation duct; 212. Dust collection box; 213. Filter layer; 214. Air outlet; 215. Dust outlet; 216. Unloading valve; 220. Vibration assembly; 221. Cylinder; 222. Push rod. 300. Gantry frame; 310. Flux feeding assembly; 311. Feeding hopper; 312. Discharge pipe; 313. Discharge valve; 320. Welding torch; 330. Support platform. Detailed Implementation

[0025] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0026] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0027] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0028] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0029] In one embodiment of the flux recovery system of this utility model, please refer to... Figures 1 to 3 A flux recovery system is installed on a gantry 300 on one side of a conveying device, which is used to carry and transport workpieces to be welded. The recovery system includes a flux supply assembly 310, a welding torch 320, and a recovery device. The recovery device includes a vacuum pump 200, a recovery box 100, and a recovery pipe 110. The flux supply assembly 310, welding torch 320, and recovery pipe 110 are arranged sequentially along the conveying direction of the conveying device on the gantry 300. A support platform 330 is provided on the side of the gantry 300 away from the conveying device. The recovery box 100 is located on the support platform 330. The bottom end of the recovery pipe 110 is provided with a suction nozzle 111, and the top end passes through the side wall of the recovery box 100 and extends into the interior. One side of the recovery box 100 is connected to the vacuum pump 200 through a dust removal assembly 210. The storage hopper 150 of the recovery device is connected to the flux supply assembly 310 through a conveying pipe 151.

[0030] Specifically, the conveying device drives the workpiece to one side of the gantry 300, allowing it to pass sequentially through the flux supply component 310, welding torch 320, and recovery pipe 110. The flux supply component 310 continuously applies flux to the welding area of ​​the workpiece. As the workpiece continues to move, the welding torch 320 performs submerged arc welding on the weld. As the workpiece continues to move, the vacuum pump 200 starts, and the recovery device sucks the used flux from the workpiece surface into the recovery box 100 through the suction nozzle 111. The flux is separated and purified in the recovery box 100 to form clean flux, which falls into the storage hopper 150 and then flows back to the flux supply component 310 through the conveying pipe 151 for reuse in the welding area of ​​the workpiece. This forms an automated cycle of feeding, welding, recovery, purification, and refeeding, effectively recovering and reusing the flux, significantly reducing the amount of new flux required, lowering production costs, and avoiding the spillage of flux from the platform edge caused by traditional manual recovery, thus reducing waste of existing flux and aligning with the environmental protection concepts of green manufacturing and sustainable development.

[0031] Please refer to Figure 3 The dust removal assembly 210 includes a ventilation duct 211 that extends into the interior of the recycling bin 100 from the top. The assembly also includes a dust collection box 212 containing a filter layer 213. One end of the ventilation duct 211 extends into the dust collection box 212, with its opening located below the filter layer 213. An air outlet 214 is located at the top of the dust collection box 212 and is connected to a vacuum pump 200 via a pipe. The top end of the recycling pipe 110 passes through the side wall of the recycling bin 100 and extends into the interior of the bin, with its top opening facing the side wall of the ventilation duct 211 and higher than the bottom end of the duct 211.

[0032] Specifically, after the vacuum pump 200 is started, a negative pressure environment is formed inside the recovery box 100 and the dust collection box 212 connected to it. Under this negative pressure, the flux is sucked into the recovery box 100 through the suction nozzle at the front end of the recovery pipe 110. Since the top opening of the recovery pipe 110 faces the side wall of the ventilation pipe 211, and the lowest point of the opening is higher than the bottom of the ventilation pipe 211, the airflow entering the recovery box 100 will form a rotating flow field along the inner wall of the box 100, thus forming a cyclone separator inside the recovery box 100. Under the action of the cyclone, the flux particles collide with the inner wall of the recovery box 100 and the outer wall of the ventilation pipe 211 under the drive of centrifugal force, causing the agglomerated flux and slag to break up and disperse, and then fall below the ventilation pipe 211 under the action of gravity, which facilitates subsequent screening. At the same time, air and fine dust enter the ventilation pipe 211 under the guidance of negative pressure, realizing preliminary gas-solid separation. Dust-laden airflow enters the dust collector 212 and passes beneath the filter layer 213. The dust is effectively trapped by the filter layer 213, while the filtered clean air is discharged from the outlet 214 at the top of the dust collector 212, automatically completing the entire gas-solid separation and air purification process. This effectively controls dust in the welding area, maintains a clean workplace, and benefits the health of operators.

[0033] Please refer to Figure 3 The top of the dust collection box 212 is also provided with a shaking component 220. The shaking component 220 includes a cylinder 221 and a push rod 222. The push rod 222 extends downward into the dust collection box 212 and is connected to the filter layer 213. The cylinder 221 is connected to the push rod 222 and is used to drive the push rod 222 to move up and down reciprocally.

[0034] Specifically, when the filter layer 213 needs cleaning, the cylinder 221 is activated. The cylinder 221 drives the push rod 222 to move up and down reciprocally. The push rod 222 causes the filter layer 213 to shake, thereby shaking the fine dust adsorbed by the filter layer 213 to the bottom of the dust collection box 212, completing the automatic cleaning. The filter layer 213 preferably uses bag filter media, such as dust collector bags.

[0035] Please refer to Figure 1 and Figure 3 The dust collector 212 has a dust outlet 215 at its bottom, and a discharge valve 216 is installed at the dust outlet 215. Specifically, the discharge valve 216 is activated to open the dust outlet 215, thereby discharging the dust and debris collected at the bottom of the dust collector 212. The bottom of the dust collector 212 is preferably conical, with an inclined inner wall to guide the dust to slide down and be discharged through the dust outlet 215, effectively reducing dust residue.

[0036] Please refer to Figure 2Inside the recycling bin 100 below the ventilation duct 211, a first vibrating screen 120, a magnetic separator 130, and a second vibrating screen 140 are arranged sequentially along the material falling direction. The screen aperture of the first vibrating screen 120 is larger than that of the second vibrating screen 140. The first vibrating screen 120 is inclined inside the recycling bin 100. A slag discharge port 121 is provided at the connection between the lower end of the first vibrating screen 120 and the inner wall of the recycling bin 100. The slag discharge port 121 is connected to a waste bin 160 for collecting welding slag. A sealing baffle 122 for opening and closing the slag discharge port 121 is rotatably installed on the outside of the slag discharge port 121.

[0037] Specifically, the flux mixture entering the recycling bin 100 is crushed by a cyclone separator and then initially screened by the first vibrating screen 120. Large particles of flux are trapped on the screen surface of the first vibrating screen 120 and slide towards the discharge port 121 along the inclined direction. Small particles of flux pass through the first vibrating screen 120, are adsorbed by the magnetic separator 130 and have their metal impurities removed, and then fall onto the second vibrating screen 140. The discharge port 121 at the end of the first vibrating screen 120 is equipped with a baffle 122, which is opened periodically to discharge the accumulated flux into the waste bin 160 through the discharge port 121.

[0038] Please refer to Figure 2 The second vibrating screen 140 is inclined inside the recycling bin 100, and the inclination direction of the first vibrating screen 120 is the same as that of the second vibrating screen 140. The magnetic separator 130 is located below the higher end of the first vibrating screen 120. A guide plate 131 is provided above the feed end of the magnetic separator 130. The upper end of the guide plate 131 is connected to the inner wall of the recycling bin 100, and the lower end extends to the feed end of the magnetic separator 130. The discharge end of the magnetic separator 130 is located above the higher end of the second vibrating screen 140.

[0039] Specifically, the first vibrating screen 120 initially removes large particles of welding slag, effectively preventing wear on the working surface of the magnetic separator 130 and extending the equipment's service life. Then, the material undersize from the first vibrating screen 120 is collected by an arc-shaped or inclined guide plate 131 and guided to the feed end of the magnetic separator 130. After the magnetic separator 130 adsorbs metallic impurities such as iron, the material falling from the discharge end is qualified welding flux. The discharge end of the magnetic separator 130 is located above the higher end of the second vibrating screen 140, allowing the dust-laden material to fall from a height. As the qualified welding flux slides down the inclined direction of the second vibrating screen 140, fine dust particles, due to their small size, have sufficient time to pass through the screen holes and be removed, further improving the purity of the recovered welding flux. Qualified welding flux effectively prevents defects such as porosity and slag inclusions in the weld, ensuring stable and reliable welding quality.

[0040] Please refer to Figure 2The lower end of the second vibrating screen 140 is connected to the inner wall of the recycling box 100, and a discharge port 141 is provided. The discharge port 141 is connected to a storage hopper 150, and the storage hopper 150 is connected to the flux supply assembly 310 through a conveying pipe 151. A sealing cover plate 142 for opening and closing the discharge port 141 is rotatably installed on the outside of the discharge port 141.

[0041] Specifically, qualified flux slides down the inclined surface of the second vibrating screen 140 to its discharge port 141. The discharge port 141 is equipped with an openable and closable cover plate 142, which is opened periodically to collect the qualified flux into the storage hopper 150 for temporary storage, so as to facilitate subsequent recycling.

[0042] Please refer to Figure 1 The flux supply assembly 310 includes a feeding hopper 311 and a discharge pipe 312. The top inlet of the feeding hopper 311 is connected to the storage hopper 150 via a conveying pipe 151. The bottom of the feeding hopper 311 is provided with a discharge port, which is connected to the discharge pipe 312. The discharge port is also provided with a discharge valve 313. A negative pressure pump is connected to the feeding hopper 311.

[0043] Specifically, the feeding hopper 311 is equipped with a transparent observation window, on which a first level line is marked to indicate the minimum level at which flux needs to be replenished. When the flux in the feeding hopper 311 is observed to be below the first level line, the negative pressure pump is activated to replenish the flux in the storage hopper 150 to the feeding hopper 311 via the conveying pipe 151, completing the replenishment cycle. When welding operations are required, the discharge valve 313 is activated, allowing flux to continuously flow out from the discharge port and spread flux onto the surface of the workpiece.

[0044] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A flux recovery system, mounted on a gantry on one side of a conveying device, the conveying device being used to carry and transport workpieces to be welded; Its features are, It includes a flux supply assembly, a welding torch, and a recovery device, wherein the recovery device includes a vacuum pump, a recovery tank, and a recovery pipe; The gantry frame is sequentially equipped with a flux supply assembly, a welding torch, and a recovery pipe along the conveying direction of the conveying device. A support platform is provided on the side of the gantry frame away from the conveying device. The recovery box is located on the support platform. One side of the recovery box is connected to the vacuum pump through a dust removal assembly. The dust removal assembly includes a ventilation pipe that extends into the recovery box from the top. The bottom end of the recovery pipe is equipped with a suction nozzle, and the top end passes through the side wall of the recovery box and extends into the box. The opening at the top of the recovery pipe faces the side wall of the ventilation pipe and is higher than the bottom end of the ventilation pipe. Inside the recycling bin below the ventilation duct, a first vibrating screen, a magnetic separator, and a second vibrating screen are arranged sequentially along the material falling direction. The screen aperture of the first vibrating screen is larger than that of the second vibrating screen. The second vibrating screen is inclined inside the recycling bin, and a discharge port is provided at the connection between the lower end of the second vibrating screen and the inner wall of the recycling bin. The discharge port is connected to a storage hopper, and the storage hopper is connected to the flux supply assembly through a conveying pipe.

2. The flux recovery system according to claim 1, characterized in that: A sealing cover plate for opening and closing the discharge port is rotatably installed on the outside of the discharge port.

3. The flux recovery system according to claim 1, characterized in that: The first vibrating screen is inclined inside the recycling box, and its inclination direction is the same as that of the second vibrating screen. A slag discharge port is provided at the connection between the lower end of the first vibrating screen and the inner wall of the recycling box. The slag discharge port is connected to a waste bin for collecting welding slag.

4. The flux recovery system according to claim 3, characterized in that: A sealing baffle for opening and closing the slag discharge port is rotatably installed on the outside of the slag discharge port.

5. The flux recovery system according to claim 3, characterized in that: The magnetic separator is located below the higher end of the first vibrating screen. A guide plate is provided above the feed end of the magnetic separator. The upper end of the guide plate is connected to the inner wall of the recycling box, and the lower end extends to the feed end of the magnetic separator. The discharge end of the magnetic separator is located above the higher end of the second vibrating screen.

6. The flux recovery system according to claim 1, characterized in that: The dust removal assembly includes a dust removal box, a filter layer inside the dust removal box, an opening at one end of the ventilation pipe extending into the dust removal box located below the filter layer, an air outlet at the top of the dust removal box, and the air outlet connected to the vacuum pump via a pipe.

7. The flux recovery system according to claim 6, characterized in that: The top of the dust collector is also equipped with a shaking component, which includes a cylinder and a push rod. The push rod extends downward into the dust collector and is connected to the filter layer. The cylinder is connected to the push rod and is used to drive the push rod to move up and down reciprocally.

8. The flux recovery system according to claim 7, characterized in that: The dust collector is provided with a dust outlet at the bottom, and a discharge valve is installed at the dust outlet.

9. The flux recovery system according to claim 1, characterized in that: The flux feeding assembly includes a feeding hopper and a discharge pipe. The top inlet of the feeding hopper is connected to the storage hopper through the discharge pipe. The bottom of the feeding hopper is provided with a discharge port, which is connected to the discharge pipe. A negative pressure pump is connected to the feeding hopper.

10. The flux recovery system according to claim 9, characterized in that: The discharge port is also equipped with a discharge valve.

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