Waste tin slag recycling device and method

Abstract

The invention discloses a waste tin slag recycling device and method, relates to the field of waste tin slag recycling, and aims at solving the problems that in the prior art, materials are prone to oxidation, consumed time is long, and efficiency is low. The double-layer spiral structure resets quickly after rotating, and the effect of vibration is achieved while downward feeding is achieved. The inlet and the outlet of the vacuum cavity are provided with the isolation cavities so that the vacuum cavity can be kept closed during feeding and discharging, automatic and controllable efficient continuous separation under vacuum can be achieved, the whole process is automatic and controllable, manual operation is not needed, and no oxidation is achieved in the vacuum environment. Meanwhile, according to the method, the materials can be cooled outside the discharging isolation cavity or the melting furnace, the repeated heating and cooling process of the material frame entering and exiting the cavity is omitted, energy is saved, consumption is reduced, material frame deformation caused by repeated heating and cooling of the material frame is avoided, cooling time is saved, and the separation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of waste tin slag recycling, in particular to a waste tin slag recycling device and method. BACKGROUND

[0002] In the field of electronic packaging, Sn-Cu is the main solder used. However, in practical applications, the composition of the solder changes after long-term use, causing the metal liquid viscosity to increase and the welding effect to deteriorate. At this time, slagging operation is needed, and in this process, pure metals or compounds containing tin are removed as waste, and they account for a high proportion in the waste tin slag. However, in the subsequent treatment of waste tin slag, these high-value substances are often only treated as ordinary waste, causing great waste of resources.

[0003] In addition, in order to improve the corrosion resistance, weldability and conductivity of copper strip, tin is often plated on the surface of the copper strip. Hot tinning process is a typical process for tin plating on the surface of copper strip, which has the characteristics of high production efficiency and no pollution. In the process of hot tinning of copper strip, the copper strip passes through the tin pot and adheres to the tin, and the tin plating on the surface of the copper strip is realized through subsequent cooling and the like. With the progress of the production process, copper ions will diffuse into the tin pot, causing the copper content in the tin pot to exceed the standard. To solve this problem, low-temperature precipitation and other methods are usually used to remove copper from the tin pot and are removed as waste tin slag. These waste tin slag mainly contains copper-tin compounds and tin brought out during slagging. At present, the waste tin slag generated by hot tinning is generally only treated as waste, resulting in a large amount of tin that cannot be effectively recycled and utilized, causing resource waste. At the same time, due to the large scale of industrial production, a large amount of waste tin slag is generated, and the existing melting separation adopts batch intermittent melting operation, which needs to go through the processes of heating, melting separation and cooling for each batch, resulting in long time consumption and low efficiency. If the treatment chamber is extended and the material is in a moving state to realize continuous treatment, due to the long time of material melting separation, a long treatment chamber is needed, which occupies a large area. And in the existing technology, the waste tin slag recycling process is carried out under non-vacuum conditions, the separated pure tin will be oxidized, and the cleanliness is poor, the degree of automation is low, and the labor intensity of workers is large. SUMMARY

[0004] In view of the problems of long time consumption, low efficiency, oxidation of pure tin, and low degree of automation in the prior art, the present application provides a waste tin slag recycling device and method, which can effectively solve the problems in the background art.

[0005] In order to achieve the above object, the application discloses a waste tin residue recycling device, which adopts the technical scheme of comprising an automatic feeding device and a melting furnace, the automatic feeding device and the melting furnace are corresponding at the inlet position, the main body of the melting furnace is a vacuum cavity, and the vacuum cavity is connected with an isolation type feeding and discharging mechanism; the vacuum cavity is internally provided with a heating device and a melting separation mechanism; the melting separation mechanism is a double-layer spiral structure, the upper layer is a spiral feeding groove, and the lower layer is a spiral receiving groove; the spiral feeding groove is provided with a filter screen, materials entering from the inlet of the vacuum cavity can fall on the spiral feeding groove, and the molten liquid passing through the filter screen can fall on the spiral receiving groove; the melting separation mechanism is rotationally connected in the vacuum cavity, and the melting separation mechanism is drivingly connected with a driving device; the discharging isolation cavity is provided with a discharging mechanism; the device further comprises a control device, the vacuum cavity is provided with a temperature detection device and a pressure detection device, and is connected with a vacuum pumping device; and the control device is electrically connected with the vacuum pumping device, the heating device, the driving device, the isolation type feeding and discharging mechanism, the temperature detection device and the pressure detection device. The heating device can heat the inside of the vacuum cavity, the isolation type feeding and discharging mechanism can directly form a transition between the vacuum cavity and the outside, the melting separation mechanism with the double-layer spiral structure can realize continuous movement of the materials and has sufficient residence time, so that the material separation and recycling efficiency is improved. The control device realizes automatic control of the whole recycling process, has high automation degree, and is low in labor intensity of workers.

[0006] As a preferred technical scheme of the application, the melting separation mechanism comprises a center cylinder, the spiral feeding groove and the spiral receiving groove are arranged on the outer wall of the center cylinder, the bottom surface of the vacuum cavity is provided with a bottom base, and the center cylinder is hingedly connected to the bottom base; the outer wall of the center cylinder is provided with a gear, the bottom base is provided with a hinged seat, a transmission rod is hingedly arranged in the hinged seat, one end of the transmission rod is connected with a gear, the other end of the transmission rod is connected with the driving device after penetrating out of the vacuum cavity, the driving device is a stepping motor, and the gear is engaged with the gear of the center cylinder. The transmission rod is driven to rotate by the stepping motor, and then the center cylinder is driven to rotate through gear transmission, and the spiral feeding groove and the spiral receiving groove are driven to rotate by the center cylinder.

[0007] As a preferred technical scheme of the application, the heating device is an electric heating pipe, the electric heating pipe is vertically arranged in the center cylinder; a fan is further arranged in the center cylinder, the center cylinder is connected with an inert gas supply pipeline, the inert gas supply pipeline is connected with an inert gas source, and the pipeline opening of the inert gas supply pipeline is located in the upwind direction of the fan; and the electric heating pipe and the fan are electrically connected with the microprocessor. The electric heating pipe can heat the sealed cavity, the fan can uniformly distribute the heat generated by the electric heating pipe in the sealed cavity, the inert gas supply can avoid oxidation and provide a gas flow medium, and the uniform distribution of temperature is promoted.

[0008] As a preferred technical scheme of the application, the lower ends of the spiral feeding groove and the spiral receiving groove are both provided with temporary storage discs. The high-boiling-point components leaving the spiral feeding groove and the low-boiling-point components leaving the spiral receiving groove are temporarily stored in the two temporary storage discs.

[0009] As a preferred technical scheme of the present application, the vacuum cavity is provided with a support frame, a turnover frame is hinged to the support frame, a weight sensor is arranged on the turnover frame, and the temporary storage disc is arranged on the weight sensor; the hinge shaft between the turnover frame and the support frame penetrates through the vacuum cavity and is connected to a turnover motor, and the weight sensor and the turnover motor are electrically connected to the control device. During the rotation of the melting and separating mechanism, the lower end of the spiral material conveying groove and the spiral material receiving groove is always located above the temporary storage disc, and the turnover frame is driven to turn over by the turnover motor, so that the temporary storage material in the temporary storage disc can be poured out and the product can be discharged.

[0010] As a preferred technical scheme of the present application, the isolation type feeding and discharging mechanism comprises a feeding isolation cavity and a discharging isolation cavity, wherein a cavity cover is arranged at the inlet of the feeding isolation cavity, a feeding isolation door is arranged at the outlet of the feeding isolation cavity, the cavity cover corresponds to the position of the automatic feeding device, the feeding isolation door corresponds to the position of the inlet of the vacuum cavity, the discharging isolation cavity is arranged at the outlet of the vacuum cavity, a discharging isolation door is arranged between the discharging isolation cavity and the vacuum cavity, the discharging isolation door is connected to a discharging door opening mechanism, the discharging mechanism comprises a material collecting disc, the material collecting disc is lower than the temporary storage disc, a track is arranged in the discharging isolation cavity, the material collecting disc can move along the track, the material collecting disc is connected to a power mechanism, an outer door is arranged at the outlet of the discharging isolation cavity, the feeding isolation cavity and the discharging isolation cavity are connected to a vacuum pumping device, and the discharging door opening mechanism and the power mechanism are electrically connected to the control device.

[0011] As a preferred technical scheme of the present application, the cavity cover is connected to a cover opening mechanism, and the cover opening mechanism is electrically connected to the control device.

[0012] As a preferred technical scheme of the present application, the feeding isolation door is hinged to the inside of the vacuum cavity, a traction lug is connected to the end away from the hinge shaft, and a waist-shaped hole is arranged on the traction lug; the door opening device is a hydraulic cylinder assembly, the fixed end of the hydraulic cylinder assembly is mounted on the top surface of the vacuum cavity, the telescopic end has a sliding rod, and the sliding rod slides in the waist-shaped hole; the hydraulic cylinder is connected to a hydraulic control pipeline, and the hydraulic control pipeline is electrically connected to the control device.

[0013] The application further discloses a recycling method based on the waste tin residue recycling device. Step 1, opening the cavity cover, feeding the material into the feeding isolation cavity by the automatic feeding device, and closing the cavity cover; Step 2, vacuumizing the feeding isolation cavity and the vacuum cavity to below 10 Pa; Step 3, after heating the vacuum cavity to 250-400 DEG C by the heating device, opening the feeding isolation door by the door opening device, and feeding the material into the vacuum cavity and onto the spiral material conveying groove; Step 4, the step motor drive melting separation mechanism slowly runs in the direction of spiral downward, and then quickly reverses to reset, the material is relatively displaced with the melting separation mechanism under the action of inertia, and the downward transportation of the material is realized; the residence time of the material in the vacuum cavity is 0.5-4h Step 5, the material on the spiral walking material groove is in the vacuum cavity, and the low-melting-point component gradually melts and falls on the spiral receiving material groove through the filter screen and flows downward along the spiral receiving material groove; Step 6, the high-melting-point component in the material is collected in the temporary storage disc at the lower end of the spiral walking material groove after passing through the spiral walking material groove, and the low-melting-point component is collected in the temporary storage disc at the lower end of the spiral receiving material groove after passing through the spiral receiving material groove; Step 7, the temporarily stored material in the temporary storage disc is transported out through the discharging device, and continuous melting separation is realized.

[0014] As a preferred technical scheme of the present application, in step 4, the forward running speed of the melting separation mechanism is 0.05-1° / s, and the reverse running speed is 0.5-5° / s.

[0015] Compared with the prior art, the present application has the beneficial effects that: by setting the feeding isolation cavity and the discharging isolation cavity, the present application can form a transition between the vacuum cavity and the outside, so as to receive external feeding, output products to the outside while maintaining the vacuum environment of the vacuum cavity. In the vacuum cavity, by setting the rotatable double-spiral melting separation mechanism, the material can be advanced while being allowed to stay in the vacuum cavity for a sufficient time to meet the melting requirements of low-component substances, and the material can be subjected to an equivalent vibration effect in the conveying process, thereby realizing continuous separation, saving preheating time, and allowing the products to be cooled outside the melting furnace or the discharging isolation cavity, thereby saving the process of repeatedly heating and cooling the material rack in and out of the cavity, saving energy, reducing consumption, avoiding the deformation problem of the material rack caused by repeated heating and cooling of the material rack, saving the time consumption of cooling, improving the separation efficiency; and the double-spiral structure can greatly reduce the space occupied by continuous separation, and the structure is simple, thereby reducing the cost. BRIEF DESCRIPTION OF DRAWINGS

[0016] Fig. 1 It is a structural schematic view of the present application; Fig. 2 It is a structural schematic view of the melting separation mechanism of the present application; Fig. 3 It is a circuit connection schematic view of the present application.

[0017] In the diagram: 1. Material; 2. Automatic feeding device; 3. Chamber cover; 4. Feeding isolation chamber; 5. Door opening device; 6. Feeding isolation door; 7. Vacuum chamber; 8. Spiral feeding chute; 9. Spiral receiving chute; 10. Heating device; 11. First vacuuming device; 12. First gas collecting pipeline; 13. Feeding isolation valve; 14. Vacuum valve; 15. Waste gas treatment device; 16. Control device; 17. Weight sensor; 18. Discharge isolation door; 19. Second vacuuming device; 20. Discharge isolation chamber; 21. First receiving tray; 22. Discharge isolation valve; 23. First collecting material; 24. Second collecting tray; 25. Second collecting material; 26. Outer door; 27. Fan; 28. Central cylinder; 29. ​​Inert gas supply pipeline. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example 1

[0019] like Figs. 1-2 As shown, this embodiment also discloses the first implementation of the present invention, which first discloses a waste tin slag recycling and reuse device. The technical solution adopted is as follows: it includes a vacuum chamber 7, with a feed inlet on the top surface of the vacuum chamber 7. A feed isolation chamber 4 with vertical opening is provided on the side away from the vacuum chamber 7 at the feed inlet. A chamber cover 3 is provided at the top opening of the feed isolation chamber 4, and a cover opening mechanism is connected to the chamber cover 3. An automatic feeding device 2 is provided above the top opening of the feed isolation chamber 4. The automatic feeding device 2 is a conveyor belt, which can transport materials. Material 1, which is waste tin slag, is connected to the upper side wall of the feeding isolation chamber 4 in order to create a vacuum environment for the vacuum chamber 7 and the feeding isolation chamber 4. The feeding isolation chamber 4 is equipped with a feeding vacuum pipe and a feeding isolation valve 13. The top surface of the vacuum chamber 7 is connected to a molten vacuum pipe and a vacuum valve 14 is installed on the molten vacuum pipe. Both the feeding vacuum pipe and the molten vacuum pipe are connected to the first vacuum pumping device 11, and their rear ends are connected to the waste gas treatment device 15 through the first gas collecting pipe 12. The waste gas treatment device 15 includes an activated carbon box.

[0020] To maintain the vacuum state of the vacuum chamber 7 during feeding into the feeding isolation chamber 4, a feeding isolation door 6 is hinged inside the feeding port of the vacuum chamber 7. The free end of the feeding isolation door 6 is connected to a traction lug, which has an oblong hole. An opening device 5, a hydraulic cylinder, is installed on the top surface of the vacuum chamber 7. Its fixed end is connected to the top surface of the vacuum chamber 7, and its telescopic end is connected to a sliding rod, which slides in contact within the oblong hole. The hydraulic cylinder is connected to a first hydraulic control line.

[0021] In order to make the material 1 in the vacuum cavity 7 can be discharged according to the order of feeding, ensure that the material 1 in the vacuum cavity 7 has enough residence time, the bottom surface of the vacuum cavity 7 is provided with a bottom platform, the top surface of the bottom platform has a seat hole, the center cylinder 28 of the molten separation mechanism is hinged in the seat hole, the outer wall of the center cylinder 28 is integrally formed with a spiral feeding groove 8 and a spiral receiving groove 9, the outer diameter of the spiral receiving groove 9 is not less than that of the spiral feeding groove 8, and the pitch, height and number of turns of the two are the same, both sides are provided with a baffle, and the bottom surface of the spiral feeding groove 8 is a filter screen; the outer wall of the center cylinder 28 is provided with a conical tooth, the top surface of the bottom platform is provided with a hinge seat, a transmission rod is hinged on the hinge seat, one end of the transmission rod is connected with a conical gear, the other end of the transmission rod penetrates out of the vacuum cavity 7 and is connected with a stepping motor, and the conical gear is engaged with the conical tooth of the center cylinder 28. The transmission rod and the cavity wall of the vacuum cavity 7 are in mechanical sealing mode to realize vacuum dynamic sealing.

[0022] In order to temporarily store the separated substances, a support frame is arranged in the vacuum cavity 7, one end of the support frame away from the center cylinder 28 is hinged with a turnover frame, a temporary storage disc is arranged on the turnover frame, and the hinge shaft between the turnover frame and the support frame penetrates out of the vacuum cavity 7 and is connected with a turnover motor. The hinge shaft and the cavity wall of the vacuum cavity 7 are in mechanical sealing mode to realize vacuum dynamic sealing.

[0023] The top surface of the center cylinder 28 is open, in order to heat the vacuum cavity 7, a heating device 10 is arranged in the center cylinder 28, the heating device 10 includes an electric heating pipe and a fan 27, the electric heating pipe is vertically arranged in the center cylinder 28, the fan 27 is located below the electric heating pipe, the bottom surface of the vacuum cavity 7 is connected with an inert gas supply pipeline 29, the inert gas supply pipeline 29 is connected with an inert gas source, the gas outlet of the inert gas supply pipeline 29 penetrates through the bottom surface of the vacuum cavity 7 and extends into the center cylinder 28 in the upwind direction of the fan 27, the inert gas can be blown out of the center cylinder 28 through the fan 27, and after being heated by the heat generated by the electric heating pipe, the inert gas is distributed in the vacuum cavity 7, so that the temperature in the vacuum cavity 7 is more uniformly increased.

[0024] In order to be able to transfer the product temporarily stored in the temporary storage disc, a discharge port is arranged at the lower part of the side wall of the vacuum cavity 7, the discharge port is communicated with a discharge isolation cavity 20, in order to make the discharge not affect the vacuum environment in the vacuum cavity 7, a discharge isolation door 18 is arranged at the discharge port, the discharge isolation door 18 is of a lifting structure, has a tooth on the side surface, a transmission shaft is hinged on the side wall of the vacuum cavity 7, one end of the transmission shaft is connected with a gear, the other end of the transmission shaft penetrates out of the vacuum cavity 7 and is connected with a lifting motor, and the gear is engaged with the gear on the side surface of the discharge isolation door 18. The transmission shaft and the cavity wall of the vacuum cavity 7 are in mechanical sealing mode to realize vacuum dynamic sealing.

[0025] Two groups of tracks are arranged in the discharging isolation chamber 20, and the two groups of tracks are in sliding contact with push discs with open top surfaces, the push discs are arranged with a first material collecting disc 21 and a second material collecting disc 24, the first material collecting disc 21 and the second material collecting disc 24 correspond to the positions of the two temporary storage discs respectively, and the heights of the first material collecting disc 21 and the second material collecting disc 24 are lower than the heights of the temporary storage discs corresponding to the first material collecting disc 21 and the second material collecting disc 24, so that the temporary storage discs can pour the collected materials into the material collecting disc after being turned over. The two push discs are connected with a group of hydraulic rods respectively, and the two groups of hydraulic rods are connected with a second hydraulic control pipeline and a third hydraulic control pipeline respectively. The discharging isolation chamber 20 is connected with a discharging vacuum pipe, the discharging vacuum pipe is arranged with a discharging isolation valve 22, and the discharging vacuum pipe is connected with the second vacuum pumping device 19 at the rear end, and then connected with the waste gas treatment device 15 through a second gas collecting pipeline. The discharging isolation chamber 20 is open at the end away from the vacuum chamber 7, and is arranged with an outer door 26.

[0026] The feeding isolation valve 13, the vacuum valve 14 and the discharging isolation valve 22 are all manual ball valves.

[0027] The first vacuum pumping device 11 and the second vacuum pumping device 19 are vacuum pumps.

[0028] In order to realize automatic control, a control device 16 is arranged, a temperature sensor and a pressure sensor are arranged in the vacuum chamber 7, a pressure sensor is arranged in the feeding isolation chamber 4 and the discharging isolation chamber 20, and a weight sensor 17 is arranged between the two temporary storage discs and the turning-over frame; the control device 16 is a PLC controller, which is electrically connected with the automatic feeding device 2, the cover opening mechanism, the electric heating pipe, the fan 27, the stepping motor, the turning-over motor, the lifting motor, the first hydraulic control pipeline, the second hydraulic control pipeline, the third hydraulic control pipeline, the first vacuum pumping device 11, the second vacuum pumping device 19, the temperature sensor, the pressure sensor and the weight sensor 17. The control device 16 controls the whole recycling process to realize automatic control of the whole process.

[0029] The application also discloses a method for recycling waste tin slag by using the waste tin slag recycling device. Step 1, the control device 16 drives the cover opening mechanism to open the cavity cover 3, and quantitatively feeds the material 1 into the feeding isolation chamber 4 through the automatic feeding device 2, and then closes the cavity cover 3; Step 2, open the feeding isolation valve 13, start the first vacuum pumping device 11 to pump the feeding isolation chamber 4 to 10 Pa, then close the first vacuum pumping device 11; close the feeding isolation valve 13, open the vacuum valve 14, open the first vacuum pumping device 11 to pump the vacuum chamber 7 to 10 Pa, then close the first vacuum pumping device 11; Step 3, the heating device 10 generates heat through the electric heating tube, the fan 27 blows hot air out, and the vacuum cavity 7 is heated to 250℃. Then, the first hydraulic control pipeline drives the hydraulic cylinder of the door opening device 5 to extend, and the feeding isolation door 6 is opened. The material 1 enters the vacuum cavity 7 and falls on the spiral material conveying groove 8. After unloading, the hydraulic cylinder and the feeding isolation door 6 are reset. Step 4, the step motor drives the melting separation mechanism to rotate slowly in the downward direction of the spiral. After running at an angular velocity of 0.05° / s for 1s, it is quickly reversed at a speed of 0.5° / s for 0.1s and then resets, forming a cycle. The material 1 moves downward under the action of inertia and relative displacement with the spiral material conveying groove 8, realizing the downward transportation of the material 1 and achieving the vibration effect. Step 5, the material 1 on the spiral material conveying groove 8 melts in the vacuum cavity 7, and the pure tin falls through the filter screen and flows down the spiral material receiving groove 9. Step 6, the copper-tin compound in the material 1 is collected in the temporary storage disc at the lower end of the spiral material conveying groove 8 after passing through the spiral material conveying groove 8, and the pure tin is collected in the temporary storage disc at the lower end of the spiral material receiving groove 9 after passing through the spiral material receiving groove 9. Step 7, when the control device 16 detects that the temporary storage material in the temporary storage disc reaches the set value through the weight sensor 17, it drives the step motor to reverse to the initial position, drives the lifting motor to run to open the discharge isolation door 18, drives the second hydraulic control system and / or the third hydraulic control system to run (if the upper temporary storage disc reaches the set weight, the second hydraulic control system is started, and if the lower temporary storage disc reaches the set weight, the third hydraulic control system is started), sends the first material collecting disc 21 and / or the second material collecting disc 24 into the vacuum cavity 7, drives the turnover motor to run, turns over the temporary storage disc, and unloads the temporary storage material into the material collecting disc, forming the first collected material 23 and / or the second collected material 25 (the first collected material 23 is in the first material collecting disc 21, and the second collected material 25 is in the second material collecting disc 24), the first material collecting disc 21 and / or the second material collecting disc 24 are reset, and the discharge isolation door 18 is reset. Step 8, open the outer door 26, take out the material collecting disc from the pushing disc, replace the new material collecting disc, and then send the new material collecting disc into the discharge isolation cavity 20. The outer door 26 is reset. Example 2

[0030] The difference between this embodiment and example 1 is that in the recycling method, step 3, the heating device 10 heats the vacuum cavity 7 to 400℃, and then the feeding isolation door 6 is opened. In step 4, the step motor drives the melting separation mechanism to rotate in the downward direction of the spiral at 1° / s for 1.5s, and then quickly reverses at a speed of 5° / s for 0.3s and then resets. Example 3

[0031] The difference between this embodiment and embodiment 1 is that in the recycling method, in step 3, after heating the vacuum cavity 7 to 300 DEG C by the heating device 10, open the feeding isolation door 6; In step 4, the step motor drives the melting separation mechanism to rotate in the spiral downward direction at 0.5 DEG / s for 2s, and then quickly reverse rotate at 2.5 DEG / s for 0.4s and reset. Embodiment 4

[0032] The difference between this embodiment and embodiment 1 is that in the recycling method, in step 3, after heating the vacuum cavity 7 to 350 DEG C by the heating device 10, open the feeding isolation door 6; In step 4, the step motor drives the melting separation mechanism to rotate in the spiral downward direction at 0.75 DEG / s for 2s, and then quickly reverse rotate at 3.5 DEG / s for 0.43s and reset.

[0033] The circuit and mechanical connection involved in the present application are common means adopted by those skilled in the art, and technical inspiration can be obtained through limited experiments, which belongs to common general knowledge.

[0034] The cover opening mechanism is prior art, for example, the structure described in Chinese patent CN213747801U Large-scale shaft furnace head automatic opening device can be used; other components not described in detail in this paper are prior art.

[0035] Although embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tin dross recycling device, comprising an automatic feeding device (2) and a melting furnace, the automatic feeding device (2) and the melting furnace corresponding to the inlet position of the melting furnace, characterized in that: the automatic feeding device (2) comprises a feeding device (1) and a feeding device (3), the feeding device (1) and the feeding device (3) are arranged in the same direction, and the feeding device (1) and the feeding device (3) are arranged in the same direction. The main body of the melting furnace is a vacuum cavity (7) connected with an isolated feeding and discharging mechanism; the vacuum cavity (7) is internally provided with a heating device (10) and a melting and separating mechanism; the melting and separating mechanism is a double-layer spiral structure, the upper layer is a spiral feeding groove (8), and the lower layer is a spiral receiving groove (9); the spiral feeding groove (8) is provided with a filter screen, and the material (1) entering from the inlet of the vacuum cavity (7) can fall on the spiral feeding groove (8), and the molten liquid passing through the filter screen can fall on the spiral receiving groove (9); the melting and separating mechanism is rotationally connected in the vacuum cavity (7), and the melting and separating mechanism is drivingly connected with a driving device; the discharging mechanism is arranged in the discharging isolated cavity (20); the control device (16) is electrically connected with the vacuum pumping device, the heating device (10), the driving device, the isolated feeding and discharging mechanism, the temperature detecting device and the pressure detecting device.

2. The tin dross recycling device according to claim 1, characterized in that: The melting and separating mechanism comprises a center cylinder (28), the spiral feeding groove (8) and the spiral receiving groove (9) are arranged on the outer wall of the center cylinder (28), the bottom surface of the vacuum cavity (7) is provided with a bottom base, and the center cylinder (28) is hingedly connected to the bottom base; the outer wall of the center cylinder (28) is provided with a gear, the bottom base is provided with a hinged seat, a transmission rod is hingedly arranged in the hinged seat, one end of the transmission rod is connected with a gear, the other end of the transmission rod is connected with the driving device after penetrating out of the vacuum cavity (7), the driving device is a stepping motor, and the gear is engaged with the gear of the center cylinder (28).

3. The tin dross recycling device according to claim 2, characterized in that: The heating device (10) is an electric heating pipe, the electric heating pipe is vertically arranged in the center cylinder (28); a fan (27) is further arranged in the center cylinder (28), the center cylinder (28) is connected with an inert gas supply pipeline (29), the inert gas supply pipeline (29) is connected with an inert gas source, and the pipeline opening of the inert gas supply pipeline (29) is located in the upwind direction of the fan (27); the electric heating pipe and the fan (27) are electrically connected with the microprocessor.

4. The tin dross recycling device according to claim 2, characterized in that: The spiral feeding groove (8) and the spiral receiving groove (9) are both provided with a temporary storage disc at the lower end.

5. The tin dross recycling device according to claim 4, characterized in that: The vacuum cavity (7) is provided with a support frame, a turnover frame is hingedly arranged on the support frame, a weight sensor (17) is arranged on the turnover frame, and the temporary storage disc is arranged on the weight sensor (17); the hinge shaft between the turnover frame and the support frame is connected with a turnover motor after penetrating out of the vacuum cavity (7), and the weight sensor (17) and the turnover motor are electrically connected with the control device (16).

6. The tin dross recycling device according to claim 5, characterized in that: The isolated feeding and discharging mechanism comprises a feeding isolated cavity (4) and a discharging isolated cavity (20), wherein the feeding isolated cavity (4) is provided with a cavity cover (3) at the inlet and a feeding isolated door (6) at the outlet, the cavity cover (3) corresponds to the position of the automatic feeding device (2); the feeding isolated door (6) corresponds to the position of the inlet of the vacuum cavity (7); the discharging isolated cavity (20) is located at the outlet of the vacuum cavity (7), and the discharging isolated cavity (20) and the vacuum cavity (7) are provided with a discharging isolated door (18) therebetween, the discharging isolated door (18) is connected with a discharging door opening mechanism; the discharging mechanism comprises a material collecting disc, the material collecting disc is lower than the temporary storage disc; the discharging isolated cavity (20) is provided with a track, the material collecting disc can move along the track, the material collecting disc is connected with a power mechanism; the discharging isolated cavity (20) is provided with an outer door (26) at the outlet; the feeding isolated cavity (4) and the discharging isolated cavity (20) are connected with a vacuum pumping device; the discharging door opening mechanism and the power mechanism are electrically connected with a control device (16).

7. The tin dross recycling device according to claim 6, characterized in that: The cavity cover (3) is connected with a cover opening mechanism, and the cover opening mechanism is electrically connected with the control device (16).

8. The tin dross recycling device according to claim 6, characterized in that: The feeding isolated door (6) is hinged to the inside of the vacuum cavity (7), and the end away from the hinge shaft is connected with a traction lug, and the traction lug is provided with a waist-shaped hole; the door opening device (5) is a hydraulic cylinder assembly, the fixed end of which is installed on the top surface of the vacuum cavity (7), and the telescopic end is provided with a sliding rod, which slides in the waist-shaped hole; the hydraulic cylinder is connected with a hydraulic control pipeline, and the hydraulic control pipeline is electrically connected with the control device (16).

9. A recycling method based on the tin dross recycling device according to claim 1, characterized in that, The method comprises the following steps: Step 1, open the cavity cover (3), and use the automatic feeding device (2) to put the material (1) into the feeding isolated cavity (4), and then close the cavity cover (3); Step 2, vacuumize the feeding isolated cavity (4) and the vacuum cavity (7) to below 10 Pa; Step 3, after heating the vacuum cavity (7) to 250-400℃ by the heating device (10), open the feeding isolated door (6) by the door opening device (5), and the material (1) enters the vacuum cavity (7) and falls on the spiral material conveying groove (8); Step 4, the step motor drives the melting and separating mechanism to run slowly in the downward spiral direction, and then quickly reverses to reset, the material (1) is relatively displaced with the melting and separating mechanism under the action of inertia, and the downward transportation of the material (1) is realized; the residence time of the material (1) in the vacuum cavity (7) is 0.5-4 h; Step 5, the material (1) on the spiral material conveying groove (8) gradually melts in the vacuum cavity (7), and the low-melting-point components fall on the spiral material receiving groove (9) through the filter screen and flow downward along the spiral material receiving groove (9); Step 6, the high-melting-point components in the material (1) are collected in the temporary storage disc at the lower end of the spiral material conveying groove (8) after passing through the spiral material conveying groove (8), and the low-melting-point components are collected in the temporary storage disc at the lower end of the spiral material receiving groove (9) after passing through the spiral material receiving groove (9); Step 7, the temporarily stored material in the temporary storage disc is transported out by the discharging device, and continuous melting and separating is realized.

10. The recycling method of claim 9, wherein: In step 4, the forward running speed of the melt separation mechanism is 0.05-1° / s, and the reverse running speed is 0.5-5° / s; after 1-2s of forward running, the reverse running is 0.1-0.5s to form a cycle, and the cycle is repeatedly run.

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