TWI760988B - Metal recovery system and metal recovery method using the same - Google Patents

Abstract

A metal recovery system is disclosed. The metal recovery system includes a soaking chamber, a collecting tank, a crushing unit, and a sorting unit. The soaking chamber has a first inlet, an internal space and a coolant placed in the internal space. The collecting tank has a second inlet and a first outlet. The crushing unit has a third inlet and a second outlet connected to the first outlet. The sorting unit is arranged corresponding to the second outlet. A metal coated with colloid is placed in a feed tank connected with a moving unit to move between the first inlet and the second inlet and enter and exit the internal space of the coolant to hard or vitrify the colloid.

Description

Metal recovery system and metal recovery method using the same

The present invention relates to a metal recovery system and a metal recovery method using the same, more specifically, a metal recovery system for treating colloid-coated metals and a metal recovery method using the same.

With economic development, Taiwan's metal consumption is increasing day by day. However, due to the lack of metal mineral resources, Taiwan's metal sources are mostly imported, and the metal smelting process will produce waste gas, waste water, and waste residue pollution, which will put pressure on the ecological environment. Therefore, in order to stabilize the source of raw materials such as metal minerals to ensure economic development and reduce the waste generated in the metal smelting process to implement environmental protection, it is of great importance to strengthen the recycling of recycled metals from scrap metals.

According to the statistics of environmental protection statistics, in 2008, 1.47 million general waste household appliances and 2.78 million waste information items were recycled in Taiwan. General waste household appliances include televisions, washing machines, refrigerators, air conditioners and electric fans, while waste information items include notebook computers, motherboards, monitors, printers, mobile phones, keyboards, etc. These waste household appliances and waste information items include many recyclable metals, such as copper, lead, aluminum, iron, etc.

Copper pipes in domestic waste air-conditioning are covered with asphalt glue. Asphalt glue has high viscosity characteristics, so copper pipes cannot be easily separated from asphalt glue, which makes copper pipe recycling difficult.

The current practice in the industry to recycle the copper pipes covered with asphalt glue is to scrape them off manually. The manual scraping method is not only time-consuming and labor-intensive, but also cannot completely remove the asphalt glue on the copper pipe, which has problems such as high recovery cost and poor quality of the recovered copper metal, so there is still a lot of room for improvement.

An object of the present invention is to separate and recover colloids and metals separately. The invention provides a metal recovery system, which includes a soaking chamber, a crushing unit and a sorting unit, wherein the soaking chamber has a first feeding port and a coolant placed in its inner space, and the crushing unit has a third feeding port and a second feeding port Two discharge ports, and the sorting unit is arranged corresponding to the second discharge port. The colloid-coated metal is placed in a feed trough connected to a moving unit to move between the soaking chamber and the crushing unit and into and out of the soaking chamber's coolant to harden or vitrify the colloid.

In one embodiment, the metal recovery system further includes a sump. The collecting trough has a second feeding port and a first discharging port connected with the third feeding port, and the feeding trough moves between the first opening of the soaking chamber and the second feeding port of the collecting trough through the moving unit .

In one embodiment, the mobile unit may include: a hollow rotating platform; a rotating device connected with the hollow rotating platform and the feeding chute; a mobile unit body disposed at the hollow of the hollow rotating platform; a lifting device disposed on the mobile unit body ; a connector connecting the hollow rotating platform and the lifting device; and a movement control module connected with the hollow rotating platform, the lifting device and the rotating device to control the hollow rotating platform, the lifting device and the rotating device.

In one embodiment, the metal recovery system may further include a coolant input conduit in fluid communication with the soaking chamber.

In an embodiment, wherein the crushing unit may comprise a mechanical crushing device.

In one embodiment, the sorting unit may include a specific gravity sorting device, a size sorting device, a gravimetric sorting device, or any combination thereof.

In one embodiment, the metal recovery system may further include a pretreatment unit that classifies the colloid-coated metal before the colloid-coated metal is placed in the feed chute.

In one embodiment, the preprocessing unit may include a sensing module and an analysis module, wherein the analysis module performs a neural network-like operation according to the data provided by the sensing module.

In one embodiment, the neural network-like operation includes AlexNet, VGGNet, or ResNet.

Another object of the present invention is to provide a metal recovery method using the above-mentioned metal recovery system, which comprises the following steps: placing the metal coated with colloid in a coolant to vitrify the above-mentioned colloid; The metal is moved to the crushing unit to crush the vitrified colloid; and the crushed vitrified colloid and the metal are separated in the sorting unit.

In one embodiment, the metal recovery method may further include sorting the colloid-coated metal in a pretreatment unit prior to placing the colloid-coated metal in the coolant.

The present invention can utilize the colloid properties on the metal to first harden or vitrify the colloid with a coolant whose temperature is lower than the glass transition temperature of the colloid, and then break the hardened or vitrified colloid to achieve complete separation of the colloid and the metal, thereby improving the Recycling quality of metals.

Descriptions of known functions and constructions that may unnecessarily obscure the objects of the present invention will be omitted.

It will be further understood that when "comprising" and/or "comprising" is used in this specification, it refers specifically to the presence of said features, integers, steps, operations, elements, components, and/or groups thereof , but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. When the singular form "a" is used in this specification, it is intended to include the plural form as well, unless the context clearly dictates otherwise.

It will be understood that, although the terms "first", "second", etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections may not be You should be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section.

FIG. 1 is a schematic flowchart of a metal recovery system according to an embodiment of the present invention. The present invention is a metal recovery system 10 designed by utilizing the properties of colloid hardening and vitrification at the glass transition temperature. As shown in FIG. 1 , the metal or metal pipes 3 covered with colloid are firstly classified by the pretreatment unit, and then placed in the feeding tank 17 according to the classification to enter and exit the soaking chamber 11 , and the soaking chamber 11 is equipped with cooling agent to harden or vitrify the colloid 5, the metal or metal tube 3 coated with the hardened or vitrified colloid 5 is then moved to the collecting tank 13, and then processed by the crushing unit 19 and the sorting unit 12 in sequence To separate the metal or metal tube 3 and the colloid 5. In one embodiment, the pretreatment unit may be omitted, and the colloid-coated metal or metal pipe 3 may be directly placed in the feed tank 17 without going through the pretreatment unit classification and then undergo subsequent steps.

FIG. 2 is a schematic diagram of a metal recovery system 10 according to an embodiment of the present invention. An embodiment of the present invention relates to a metal recovery system 10 , which includes a soaking chamber 11 , a collecting tank 13 , a moving unit 15 , a feeding tank 17 , a crushing unit 19 , and a sorting unit 12 . The infusion chamber 11 has a first feed port 111 and a coolant 115 placed in the inner space 113 of the infusion chamber 11 . The metal recovery system 10 of the present invention is used for treating the metal or metal pipe 3 coated with the colloid 5 thereon. Specifically, the metal recovery system 10 is used to separate the colloid 5 of the metal or metal pipe 3 coated with the colloid 5 from the metal or metal pipe 3 to recover the metal or metal pipe 3 . Examples of the gel 5 may include, but are not limited to, asphalt glue, acrylic glue, hot melt glue, silicone glue (silicon), or any combination thereof. The material of the metal or metal tube 3 may include, for example, but not limited to, copper, aluminum, gold, silver, iron, alloys of the above metals, or any combination thereof. In one embodiment, the colloid 5 can be asphalt glue, and the metal or metal pipe 3 can be copper or copper pipe.

The coolant 115 in the soaking chamber 11 is determined according to the glass transition temperature of the colloid 5 . The embodiment of the coolant 115 is not particularly limited, and any coolant having a temperature to harden or vitrify the colloid 5 may be used. Examples of coolants may include, but are not limited to, liquid nitrogen, liquid air, or combinations thereof. The temperature of coolant 115 can be ≦-60℃, ≦-65℃, ≦-70℃, ≦-75℃, ≦-80℃, ≦-85℃, ≦-90℃, ≦-95℃, ≦-100℃ , ≦-105℃, ≦-110℃, ≦-115℃, ≦-120℃, ≦-125℃, ≦-130℃, ≦-135℃, ≦-140℃, ≦-145℃, ≦-150℃ , ≦-155℃, or ≦-160℃. In one embodiment, the metal recovery system 10 may further include a coolant storage tank 14A in communication with the soaking chamber 11, the inner space 113 of the soaking chamber 11 is communicated with the coolant storage tank 14A through the coolant inlet pipe 141, and the coolant 115 may be in communication with the coolant storage tank 14A. The interior space 113 of the infusion chamber 11 is entered through the coolant conduit 141 . In one embodiment, the metal recovery system 10 may further include a coolant recovery tank 14B in communication with the soaking chamber 11, and the interior space 113 of the soaking chamber 11 communicates with the coolant recovery tank 14B through a coolant discharge pipe 142, through which the coolant pipe 142 , the coolant 115 may be directly discharged from the inner space 113 of the soaking chamber 11 . Control valves 143 and 144 may be provided on the coolant inlet pipe 141 and the coolant outlet pipe 142 , respectively, to control the coolant 115 to be input into the soaking chamber 11 and the coolant 115 in the soaking chamber 11 to be recovered. The time and steps required to replace the coolant 115 can be reduced by the coolant storage tank 14A, the coolant recovery tank 14B, the coolant inlet and outlet pipes 141 and 142, and the control valves 143 and 144.

The collecting tank 13 has a second feeding port 131 and a first discharging port 133 . The sump 13 may be in parallel with the infusion chamber 11 or may be spaced apart from the infusion chamber 11 . In one embodiment, the soaking chamber 11 is not in communication with the sump 13 . When the soaking chamber 11 is not in communication with the collecting tank 13 , the coolant 115 in the soaking chamber 11 will not spread to the collecting tank 13 , so that the amount of the coolant 115 can be reduced. In one embodiment, the soaking chamber 11 may further include a movable door panel (not shown). The movable door panel may cover the first feeding port 111 to prevent the coolant 115 from diffusing from the inner space 113 of the infusion chamber 11 to the outside, thereby effectively maintaining the temperature of the inner space 113 of the infusion chamber 11 within a desired or specific temperature range.

The feeding chute 17 is disposed on the moving unit 15 and rotates between the first feeding port 111 and the second feeding port 131 , and can be raised and lowered to enter and exit the inner space 113 of the infusion chamber 11 . In one embodiment, the feeding chute 17 may be a mesh container with an opening, but the present invention is not limited thereto. The feeding chute 17 can rotate and move between the first feeding port 111 and the second feeding port 131 through the moving unit 15 , and can move up and down into and out of the inner space 113 of the infusion chamber 11 . In one embodiment, the metal or metal tube 3 coated with the colloid 5 can be placed in the feed chute 17, and the moving unit 15 lowers the feed chute 17 into the coolant 115 of the soaking chamber 11, and in the coolant 115 for a while. Since the coolant 115 has a temperature that can harden or vitrify the colloid 5 covering the metal or metal tube 3 (that is, the coolant 115 needs to have a temperature lower than the glass transition temperature of the colloid 5), it is necessary to soak in the coolant 115 for a period of time. Over time, the colloid 5 covering the metal or metal tube 3 will harden or vitrify. After the colloid 5 is hardened or vitrified, the moving unit 15 lifts the feeding chute 17 out of the inner space 113 of the infusion chamber 11 , and then the feeding chute 17 rotates and moves to the second feeding port 131 of the collecting chute 13 . The mobile unit overturns the feeding chute 17 to pour the metal or metal tube 3 coated with the colloid 5 in the feeding chute 17 into the collecting chute 13 . Therefore, the moving unit 15 has a mechanism for raising/lowering, rotating, turning over, and the like. The time that the feed tank 17 stays in the coolant 115 can be 1~120 seconds, 10~120 seconds, 20~120 seconds, 30~120 seconds, 40~120 seconds, 50~120 seconds, 60~120 seconds, 70 seconds ~120 seconds, 80~60 seconds, 90~120 seconds, 100~120 seconds, 110~120 seconds, 10~110 seconds, 10~100 seconds, 10~90 seconds, 10~80 seconds, 10~70 seconds, 10 ~60 seconds, 10~50 seconds, 10~40 seconds, 10~30 seconds, 10~20 seconds, 20~100 seconds, 20~90 seconds, 20~80 seconds, 20~70 seconds, 20~60 seconds, 20 ~50 seconds, 20~40 seconds, 20~30 seconds, 30~100 seconds, 30~90 seconds, 30~80 seconds, 30~70 seconds, 30~60 seconds, 30~50 seconds, or 30~40 seconds, However, the present invention is not limited to this. Depending on the properties of the colloid 5, the dwell time of the feed tank 17 in the coolant 115 may be greater than 120 seconds.

FIG. 3 is a schematic diagram of the mobile unit 15 connected to the feed tank 17 in the metal recovery system 10 according to an embodiment of the present invention.

Referring to FIG. 3 , the mobile unit 15 includes a hollow rotating platform 153 , a rotating device 157 connected to the hollow rotating platform 153 and the feeding chute 17 for overturning the feeding chute 17 , and a mobile unit body disposed at the hollow of the hollow rotating platform 153 (For example, a shaft, a support rod, a column, a rod, etc.) 151, a lifting device 155 provided on the mobile unit body 151, a second connecting member 159 connecting the hollow rotating platform 153 and the lifting device 155, and the hollow rotating platform 153, The lifting device 155 and the rotating device 157 are connected to control the movement control module (not shown) of the hollow rotating platform 153 , the lifting device 155 and the rotating device 157 .

The hollow rotating platform 153 may be any conventional rotating mechanism having a hollow-structured turntable. For example, the hollow rotating platform 153 may include a turntable with a hollow structure, a crossed roller bearing or a ball bearing for supporting the above-mentioned turntable, a gear disposed under the crossed roller bearing or the ball bearing, and a gear connected with the above-mentioned gear to A stepper motor or servo motor that drives the rotation of gears and components on them.

The rotating device 157 may include a first stepping motor 1571 and a first connecting member 1573 . The first step motor 1571 can be connected with the feed chute 17 and the movement control module, and the movement control module can control the rotation of the first step motor 1571 to turn over and change the opening direction of the feed chute 17, and pour out and load into the feed chute. The article in 17 is, in the present invention, a metal or metal tube 3 coated with a colloid 5 .

The first stepping motor 1571 of the rotating device 157 can be connected to the hollow rotating platform 153 through the first connecting member 1573 therein. Therefore, the rotating device 157 can be rotated and moved to a desired position by rotating the hollow rotating platform 153 . For example, the movement control module can control the rotation of the hollow rotating platform 153 to rotate the feeding chute 17 and the rotating device 157 from above the first feeding port 111 to above the second feeding port 131 . The movement control module can control the rotation of the hollow rotating platform 153 to rotate the rotating device 157 to the top of the second feeding port 131, and then control the first feeding motor 1571 of the rotating device 157 to rotate to turn over the feeding chute 17. Unload the items loaded in the feed chute 17 .

The hollow rotating platform 153 can be connected to the lifting device 155 through the second connecting member 159 . The lifting device 155 may include, but is not limited to, an oil hydraulic lifting device, a screw lifting device, a sliding rail lifting device, or a pulley lifting device. FIG. 3 illustrates an embodiment in which the lifting device 155 is a pulley lifting device, but the present invention is not limited to this. As shown in FIG. 3 , the lifting device 155 may include a driving wheel 1551 , a driven wheel 1552 and a chain 1553 . The driving wheel 1551 and the driven wheel 1552 are respectively disposed on the top and bottom ends of the moving unit body 151 , and the chain 1553 can be mounted on the driving wheel 1551 and the driven wheel 1552 . The driving wheel 1551 is connected to a motor. The motor is driven to rotate, thereby driving the driven wheel 1552 and the chain 1553. In one embodiment, the outer diameter of the driven pulley 1552 may be larger than the outer diameter of the driving pulley 1551 to reduce the possibility of the chain 1553 falling off. In another embodiment, the lifter 155 may further include an idler pulley to reduce the possibility of the chain falling off. The chain 1553 is connected with the hollow rotating platform 153 through the second connecting piece 159 , so when the mobile control module manipulates the driving wheel 1551 to rotate to drive the chain 1553 to move, the hollow rotating platform 153 will be raised or lowered to the desired position on the mobile unit body 151 Location. The movement control module controls the rotation of the driving wheel 1551 to drive the chain 1553 to move, and then lifts the hollow rotating platform 153 to a desired position on the mobile unit body 151, and then controls the hollow rotating platform 153 to rotate to rotate the rotating device 157 to the first position. Above the second feeding port 131 , the first feeding motor 1571 of the rotating device 157 is controlled to rotate to turn over the feeding chute 17 and pour out the articles loaded in the feeding chute 17 .

Through the moving unit 15 of the present invention, the feeding trough 17 can not only move between the first feeding port 111 and the second feeding port 131, but also enter and exit the inner space 113 of the soaking chamber 11, so that the feeding trough can be moved. After the articles in 17 (in the present invention, the metal or metal tube 3 coated with colloid 5) are soaked in the coolant 115 of the soaking chamber 11, the articles in the feeding tank 17 are removed from the inner space 113 of the soaking chamber 11 , and then pour the items in the feeding chute 17 to the collecting chute 13 and a series of operations.

Referring to FIG. 2 , the crushing unit 19 has a third feeding port 191 and a second discharging port 193 , and the third feeding port 191 is connected to the first discharging port 133 of the collecting tank 13 . When the metal or metal tube 3 coated with the colloid 5 in the collecting tank 13 is gathered to a certain amount, the first discharge port 133 of the collecting tank 13 can be opened so that the collecting tank 13 is coated with the colloid 5 The metal or metal tube 3 is moved into the crushing unit 19 to perform crushing operation on the hardened or vitrified colloid 5 . The crushing unit 19 may include any crushing device capable of crushing the hardened or vitrified colloid 5 . In one embodiment, the crushing unit 19 may include a mechanical crushing device. Mechanical crushing devices may include, but are not limited to, cutting devices, crushing devices, rolling devices, crushing devices, or any combination thereof. Examples of mechanical crushers may include, but are not limited to, cam crushers, jaw crushers, chain crushers, or any combination thereof. The crushed colloid 5 and the metal or metal tube 3 will be moved to the sorting unit 12 correspondingly arranged through the second discharge port 193 (refer to FIG. 2 ).

FIG. 4 is a schematic diagram of the sorting unit 12 according to an embodiment of the present invention. In FIG. 4 , the operation of the sorting unit 12 is described by taking the specific gravity sorting apparatus as an example, but the present invention is not limited to this. The sorting unit 12 of the present invention is not particularly limited, and it can be any device that can separate the broken colloid 5 from the metal or metal pipe 3 . Embodiments of the sorting unit 12 may include, but are not limited to, a specific gravity sorting device, a size sorting device, a gravimetric sorting device, or any combination thereof.

Referring to FIG. 4 , the sorting unit 12 includes a sorting unit body 120 , a separation control device 121 , a colloid separation device 123 , a metal collection device 125 and a liquid 127 . As shown in FIG. 4 , the liquid 127 is placed in the sorting unit body 120 . The liquid 127 is not particularly limited as long as its density is lower than that of the metal or metal tube 3 and greater than that of the colloid 5 so that the colloid 5 is a floating body therein and the metal or metal tube 3 is a sinking body therein. For example, the liquid 127 may include, but is not limited to, water. The metal collecting device 125 can be placed at the bottom of the sorting unit body 120 to collect the sinking metal or metal pipe 3 . In one embodiment, the metal collecting device 125 may be a mesh container with an upward opening 1251, but the present invention is not limited thereto. The separation control device 121 can be connected to a side wall of the separation unit body 120 and the colloid separation device 123 , and the colloid separation device 123 is fixed between the side wall of the separation unit body 120 and the metal collection device 125 . The separation control device 121 may include a rotation control module (not shown), a second stepping motor 1211 and a rotating shaft 1213 . The colloid separation device 123 is connected with the rotating shaft 1213 , and the rotating shaft 1213 can be connected with the rotation control module through the second stepping motor 1211 . The rotation control module can control the second stepping motor 1211 to rotate the rotating shaft 1213 . By rotating the rotating shaft 1213, the colloid separating device 123 can be switched between the scooping action and the standby action. Specifically, at the time of the standby operation, the rotation control module will control the second stepping motor 1211 to rotate the rotating shaft 1213, so that the colloid separation device 123 rotates in the direction of the side wall of the sorting unit body 120 to expose the opening 1251 of the metal collecting device 125 . During the fetching action, the rotation control module controls the second stepper motor 1211 to rotate the shaft 1213 , so that the colloid separating device 123 rotates in the direction of the metal collecting device 125 to fetch the colloid 5 floating in the liquid 127 . The colloid separation device 123 is not particularly limited, as long as it can be used to take out the colloid 5 floating in the liquid 127 . In one embodiment, the colloid separation device 123 can be a scoop, but the invention is not limited thereto. The metal collecting device 125 can be taken out from the bottom of the sorting unit body 120 after the scouring action of the colloid separating device 123 is substantially completed to complete the recovery of metals.

In one embodiment, the metal recovery system of the present invention may further include, before placing the metal or metal pipe 3 coated with the colloid 5 in the feed tank 17, first perform a process on the metal or metal pipe 3 coated with the colloid 5 . Classification preprocessing unit.

The preprocessing unit may include a sensing module and an analysis module. Embodiments of the sensing module may include, but are not limited to, an image capture device, a density analysis device, or an infrared analysis device. The analysis module can receive the data from the sensing module, compare the above data with the pre-built identification model, and classify the metal or metal tube 3 coated with the colloid 5 according to the comparison result. In one embodiment, the analysis module may perform a neural network-like operation according to the data provided by the sensing module. Examples of the neural network-like operation may include, but are not limited to, AlexNet, VGGNet, or ResNet. The neural network-like operation can generate a new identification model to replace the pre-built identification model according to the data provided by the sensing module, thereby improving the classification accuracy.

For example, in the case where the sensing module is an image capturing device, the sensing module can first perform image capturing on the metal or metal tube 3 coated with the colloid 5 . The captured image data will be input into the analysis module for comparison with the pre-built identification model in the analysis module. According to the determination result, the metal or metal tube 3 covered with colloid 5 is divided into, for example: there is no colloid 5 on the metal or metal tube 3, only part of the metal or metal tube 3 is covered by the colloid 5, and the whole metal or metal tube 3 is covered by the colloid 5. The tubes 3 are all covered by the colloid 5 and other three types, but the present invention is not limited to this. For example, the metal or metal tube 3 coated with the colloid 5 can be classified into five or more categories according to the amount of the colloid 5 , or can be classified according to the type of the colloid 5 . The analysis module can perform neural network-like operations according to the captured image data provided by the sensing module, and generate a new identification model to replace the pre-built identification model, thereby improving the classification accuracy. The moving unit 15 can adjust the time that the feed tank 17 stays in the coolant 115 according to the classification result of the preprocessing unit.

The present invention further provides a metal recovery method utilizing the above metal recovery system. FIG. 5 is a flowchart of a metal recovery method 20 according to an embodiment of the present invention. As shown in FIG. 5, the metal recovery method 20 of the present invention includes: the step S201 of placing the colloid-coated metal in a coolant to vitrify the colloid; moving the vitrified colloid-coated metal to a crushing unit to The step S203 of crushing the vitrified colloid; and the step S205 of separating the crushed vitrified colloid and the metal in the sorting unit.

In one embodiment, the metal recovery method 20 of the present invention may further include, prior to the step S201 of placing the colloid-coated metal in a coolant to vitrify the colloid, in a pretreatment unit Step S200 of classifying.

Hereinafter, the present invention will be described in more detail by taking the copper pipe coated with asphalt glue as an example.

Example

Collect the copper pipes covered with asphalt glue, use an image capture device to capture images of the copper pipes covered with asphalt glue, and transmit the captured data to the analysis module and the pre-built in the analysis module. The identification models are compared, and the analysis module determines that the copper pipes covered with asphalt glue are divided into: Category I of pure copper pipes without asphalt glue, Category II of some copper pipes covered with asphalt glue, and whole copper pipes. Category III where the pipe is coated with bituminous glue and directly recycled for Category I copper pipes.

Liquid nitrogen is fed into the interior space of the soaking chamber through a coolant line in fluid communication with the soaking chamber until the liquid nitrogen reaches a certain height.

The class II copper tube is placed in the feed tank, and the moving unit is controlled to completely immerse the class II copper tube in liquid nitrogen for 10 to 30 seconds to embrittle or vitrify the asphalt glue on the class II copper tube. Then, the moving unit is controlled to move the feed tank out of the inner space of the soaking chamber, and the copper pipes of category II in the feed tank are poured into the collection tank.

The class III copper pipes are placed in the feed tank, and the moving unit is controlled to completely immerse the class III copper pipes in liquid nitrogen for 30 to 60 seconds to embrittle or vitrify the asphalt glue on the class III copper pipes. The moving unit is then controlled to move the feed chute out of the inner space of the soaking chamber, and pour the Category III copper pipes in the feed chute into the collection chute.

Open the first discharge port of the collecting tank, and make all the copper pipes in the collecting tank enter the mechanical crushing device to break the brittle or vitrified asphalt glue on the copper pipes. The embrittled or vitrified asphalt glue and copper pipes will fall into the specific gravity sorting device from the second outlet of the mechanical crushing device. The liquid in the gravity separation device is water, the broken asphalt glue will float on the water, and the copper pipe will sink into the net basket at the bottom of the water. Remove the asphalt glue floating on the water with a scoop and place it in the glue collection tank. After the asphalt glue floating on the water is removed, take out the mesh basket to obtain a copper tube with the asphalt glue on it completely removed, thus completing the recovery of the copper tube.

The metal recovery system and the metal recovery method of the present invention utilize the colloidal properties of metals to first harden or vitrify the colloid with a coolant whose temperature is lower than the glass transition temperature of the colloid, and then crush the hardened or vitrified colloid to achieve complete integrity. Separating colloids and metals, thereby improving the quality of metal recycling.

The features of several embodiments of the present invention are summarized above, so that those with ordinary knowledge in the technical field to which the present invention pertains can more easily understand the viewpoints of the embodiments of the present invention. Those skilled in the art to which the present invention pertains should appreciate that they can, based on the embodiments of the present invention, design or modify other processes and structures to achieve the same objectives and/or advantages of the embodiments described herein. Those with ordinary knowledge in the technical field to which the present invention pertains should also understand that such equivalent processes and structures do not depart from the spirit and scope of the present invention, and they can, without departing from the spirit and scope of the present invention, Make all kinds of changes, substitutions, and substitutions.

10: Metal recycling system 20: Metal Recovery Methods 3: Metal or Metal Tube 5: Colloid 11: Immersion Chamber 111: The first feeding port 113: Interior Space 115: Coolant 12: Sorting unit 120: sorting unit body 121: Separation control device 1211: Second stepper motor 1213: Spindle 123: Colloid separation device 125: Metal Collection Device 1251: Opening up 127: Liquid 13: Aggregate chute 131: The second feed port 133: The first discharge port 14A: Coolant Storage Tank 14B: Coolant recovery tank 141: Coolant enters the pipe 142: Coolant discharge pipe 143, 144: Control valve 15: Mobile Unit 151: Mobile unit body 153: Hollow Rotary Platform 155: Lifting device 1551: Drive Wheel 1552: driven wheel 1553: Chain 157: Turning device 1571: Stepper Motor 1573: First connector 159: Second connector 17: Feed chute 19: Crushing unit 191: The third feed port 193: The second outlet S200, S201, S203, S205: Steps

The present invention may be described with reference to the following figures, wherein: FIG. 1 is a schematic flowchart of a metal recovery system according to an embodiment of the present invention. FIG. 2 is a schematic diagram of a metal recovery system according to an embodiment of the present invention. FIG. 3 is a schematic diagram of a mobile unit connected to a feed tank in a metal recovery system according to an embodiment of the present invention. FIG. 4 is a schematic diagram of a sorting unit according to an embodiment of the present invention. FIG. 5 is a flowchart of a metal recovery method according to an embodiment of the present invention.

Claims (9)

A metal recovery system includes: a pretreatment unit; a soaking chamber with a first feeding port and a coolant placed in an inner space of the soaking chamber; a crushing unit with a third feeding port and a second discharge port; and a sorting unit, disposed corresponding to the second discharge port; and a moving unit, the moving unit is connected with a feeding trough, so that the feeding trough is in the soaking chamber and The coolant that moves between the crushing units and enters and exits the soaking chamber; wherein the moving unit includes: a hollow rotating platform; a rotating device, connected with the hollow rotating platform and the feeding chute; a moving unit body, arranged on the A hollow part of the hollow rotating platform; a lifting device disposed on the mobile unit body; a connecting piece connecting the hollow rotating platform and the lifting device; and a movement control module connected to the hollow rotating platform, the lifting device The device and the rotating device are connected to control the hollow rotating platform, the lifting device and the rotating device, and the pretreatment unit pre-processes the colloid-coated metal before the colloid-coated metal is placed in the feeding chute. Metals are classified, and the moving unit adjusts the time that the feed tank stays in the coolant according to the classification result of the pretreatment unit. The metal recovery system of claim 1, further comprising a collecting tank, the collecting tank has a second feeding port and a first discharging port connected with the third feeding port, the feeding The tank moves between the first opening of the infusion chamber and the second feed port of the collecting tank through the moving unit. The metal recovery system of claim 1, further comprising a coolant conduit in fluid communication with the soaking chamber. The metal recovery system of claim 1, wherein the crushing unit comprises a mechanical crushing device. The metal recovery system of claim 1, wherein the sorting unit comprises a specific gravity sorting device, a size sorting device, a weight sorting device, or any combination thereof. The metal recycling system of claim 1, wherein the preprocessing unit includes a sensing module and an analysis module, wherein the analysis module performs a type of neural network operation according to the data provided by the sensing module. The metal recycling system of claim 6, wherein the neural network operation includes AlexNet, VGGNet or ResNet. A metal recovery method using the metal recovery system as described in any one of claims 1 to 7, comprising the steps of: placing a metal coated with a colloid in the coolant to vitrify the colloid; The metal coated with the vitrified colloid is moved to the crushing unit to crush the vitrified colloid; and the crushed vitrified colloid and the metal are separated in the sorting unit. The metal recovery method of claim 8, further comprising classifying the colloid-coated metal in the pretreatment unit before placing the colloid-coated metal in the soaking chamber.

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