Valuable metal recovery system from lithium-ion secondary battery production waste

Abstract

To provide a practical system capable of separately recovering valuable metal from scraps, especially scraps of positive electrode materials, produced from lithium ion secondary battery production processes, safely and efficiently in a dry state.SOLUTION: In a system for recovering valuable metal from scraps produced from lithium ion secondary battery production processes, each section of a primary crushing section 5, a buffer section 9, a secondary crushing section 11, an outdoor exhaust section 13, a transfer gateway section 15, a classification section 17 and a recovery section 19 are arranged in a transfer path 3, in order, from a receiving side of production process scraps, and each section and the transfer path consists of a sealed structure with the exception of open places required for processing. The outdoor exhaust section 13 consists of a product recovery device 13X including a diffusion port 13b, and is installed outside a building. In addition, the transfer gateway section 15 includes a temperature monitoring function to monitor temperatures inside a body of the product recovery device 13X, and a function to stop and / or reverse the transfer path 3 connecting the product recovery device 13X and the classification section 17, and the transfer of secondary crushed products to the classification section 17 due to temperature rise is stopped. As described above, measures for dust emission, dust explosion and fire are taken everywhere.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a system for recovering valuable metals from waste from the production process of lithium ion secondary batteries. [Background technology]

[0002] Lithium ion secondary batteries have long been used as secondary batteries for various portable devices due to their light weight and high electrical capacity, and there is a demand for their recycling in order to promote a resource-circulating society. Therefore, since widely used positive electrode materials are composed of aluminum foil with nickel and cobalt attached as active materials, they are subject to regulation under the Special Chemical Substances Regulations, or "Special Chemical Substances Regulations" for short. Throughout the entire process from receipt to separate collection, the aluminum and active materials must be separated and collected while taking sufficient safety measures against dust generation, dust explosions, and fires.

[0003] Patent Document 1 proposes, as a method for recovering valuable metals, dismantling a battery, washing the dismantled parts with alcohol or water to remove the electrolyte, and then using a wet method to separate and recover each of the constituent metals of the current collector. Lithium (Li) in the remaining aqueous solution is concentrated by solvent extraction and stripping, and then recovered as a solid lithium carbonate. However, the traditional methods mentioned above are all based on wet processes, which require wastewater treatment and are costly, which places a heavy burden on businesses and actually results in a low recycling rate. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2007-122885 A Summary of the Invention [Problem to be solved by the invention]

[0005] Recently, the demand for lithium-ion secondary batteries for automobiles has increased dramatically, and considering the sheer volume, the need for recycling has become unavoidable. On the other hand, used battery products must first be disassembled and the various materials separated. However, the scraps generated during the production process are materials before they have been laminated and integrated, such as battery positive electrode materials, so the types of materials that need to be separated are limited.

[0006] Therefore, the present invention aims to provide a practical system that can safely and efficiently separate and recover valuable metals in a dry manner by focusing on the scraps generated during the production process of lithium ion secondary batteries and by making ingenious choices in the selection, layout and structure of each processing section. [Means for solving the problem]

[0007] The present invention has been made to solve the above-mentioned problems, and the invention [1] is a recovery system for valuable metals from lithium-ion secondary battery production process waste, characterized in that, from the receiving side of the production process waste, the following sections are arranged on a conveying path, in that order: a primary crushing section, a buffer section, a secondary crushing section, an outdoor exhaust section, a conveying gate section, a classification section, and a recovery section, and each section and the conveying path are configured with a sealed structure, except for open sections necessary for processing.

[0008] The invention of [2] is a system for recovering valuable metals from lithium-ion secondary battery production process waste described in [1], characterized in that the outdoor exhaust section is composed of a product recovery device equipped with a diffusion outlet and is installed outside the building.

[0009] The invention [3] is a system for recovering valuable metals from lithium-ion secondary battery production process scrap described in [2], characterized in that the transport gate section has a temperature monitoring function for monitoring the temperature inside the main body of the product recovery device, and a function for stopping and / or reversing the transport path connecting the product recovery device and the classification section, thereby stopping the transport of secondary crushed products to the classification section due to a rise in temperature.

[0010] The invention [4] is a system for recovering valuable metals from lithium-ion secondary battery production process scraps described in any one of [1] to [3], characterized in that the buffer section is composed of a constant volume feeder, and a temperature monitoring function for monitoring the temperature inside the constant volume feeder and a function for stopping and / or reversing the conveying path provided in the constant volume feeder stop the conveying of the primary crushed product to the secondary crushing section due to a rise in temperature.

[0011] The invention [5] is a system for recovering valuable metals from lithium-ion secondary battery production process scraps described in [3] or [4], characterized in that a recovery container is provided at the reverse destination of the conveying path, and the primary crushed products or secondary crushed products that are reversed are recovered in the recovery container.

[0012] The invention [6] is a system for recovering valuable metals from lithium-ion secondary battery production process waste described in any one of [1] to [5], characterized in that an environmental dust collector is installed outside the building and dust collection ports connected to the environmental dust collector are arranged at multiple locations within the building where dust is expected to be generated, forming a local dust collection structure.

[0013] The invention [7] is a system for recovering valuable metals from lithium-ion secondary battery production process waste described in any one of [1] to [6], characterized in that any one or more of the components is equipped with a water mist spray structure. The invention of [8] is a system for recovering valuable metals from lithium-ion secondary battery production waste described in [7], characterized in that a mist formed by adding a surfactant to water is sprayed. The invention of [9] is a system for recovering valuable metals from lithium-ion secondary battery production process waste described in [7] or [8], characterized in that the mist is sprayed under the conditions of a weight ratio of 0.2 to 10.0% to the object to be sprayed, and the particle diameter of the mist is 1 to 10 μm.

[0014] The invention

[10] is a system for recovering valuable metals from lithium-ion secondary battery production process waste described in any one of [1] to [9], characterized in that the primary crushing section and / or recovery section are covered with an openable booth after receiving the production process waste.

[0015] The invention of

[11] is a system for recovering valuable metals from waste from the lithium-ion secondary battery production process described in any one of [1] to

[10] , characterized in that the treatment target is positive and negative electrode materials. The invention of

[12] is a system for recovering valuable metals from waste from the lithium-ion secondary battery production process described in

[11] , characterized in that the object of treatment is positive electrode material containing substances subject to regulation under the Specified Commercial Transactions Act. Effect of the Invention

[0016] According to the recovery system of the present invention, valuable metals can be safely and efficiently separated and recovered by a dry process from scraps generated during the production process of lithium ion secondary batteries. In particular, the recovery system of the present invention is highly useful for materials such as cathode materials that are subject to regulation under the Special Measures Act. [Brief description of the drawings]

[0017] [Figure 1] FIG. 1 is a flow diagram of a system for recovering valuable metals from lithium ion secondary battery production process scraps according to an embodiment of the present invention. [Diagram 2] FIG. 2 is a schematic diagram of the equipment constituting the recovery system of FIG. 1. [Diagram 3] FIG. 3 is a cross-sectional view of a main part of the equipment schematic diagram of FIG. 2. [Figure 4] FIG. 3 is a cross-sectional view of a main part of the equipment schematic diagram of FIG. 2. [Diagram 5] FIG. 3 is a structural image of the uniaxial crusher of FIG. 2. [Figure 6] FIG. 3 is a structural image diagram of the constant volume feeder of FIG. 2. [Figure 7] FIG. 3 is a structural image of the hammer mill in FIG. 2. [Figure 8] This is a photo of the recovered items. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0018] (Material to be processed) The material to be treated is waste generated during the production process of lithium ion secondary batteries, or simply production process waste. A lithium ion secondary battery is mainly composed of a positive electrode material, a negative electrode material, and a separator, which are laminated with an electrolyte interposed therebetween, and sealed in a bag- or case-shaped exterior body. The cathode material mainly consists of a sheet-shaped cathode current collector and an active cathode material fixed to it. The cathode current collector currently in use is made of aluminum foil, and the active cathode material is a lithium-containing composite metal oxide such as lithium cobalt oxide, which contains cobalt, nickel, and manganese, which are subject to regulation under the Specified Commercial Transactions Act. The negative electrode material mainly consists of a sheet-shaped negative electrode current collector and a negative electrode active material fixed to it. The currently mainstream negative electrode current collector is made of copper or copper alloy foil, and the negative electrode active material is made of carbon materials such as graphite that can absorb and release lithium.

[0019] In the recovery system of the present invention, the materials to be treated are crushed into fine particles for ease of handling after recovery. During this process, the active material is automatically peeled off from the current collector. Furthermore, the system is designed to deal with dust generation, dust explosions, and fires. Therefore, its true value is most apparent when used for positive and negative electrode materials, especially positive electrode materials.

[0020] <Collection system configuration> FIG. 1 is a flow diagram of the recovery system 1, FIG. 2 is a schematic diagram of the equipment constituting the recovery system 1 of FIG. 1, and FIGS. 3 and 4 are cross-sectional views of the main parts of the schematic diagram of the equipment of FIG. From the receiving side of the production process waste, the following sections are arranged in order along the conveying path 3: primary crushing section 5, buffer section 9, secondary crushing section 11, outdoor exhaust section 13, conveying gate section 15, classification section 17, and recovery section 19, forming a series of processing lines. In this processing line, the transport path 3 is sealed to prevent dust generation, and each section is also sealed except for the open parts required for processing. In addition, with the exception of the outdoor exhaust section 13, the equipment of each section is installed inside a building where it cannot be penetrated by rain or wind. The equipment that makes up each section and how the equipment is connected to each other are described in detail below.

[0021] [Primary crushing section] The primary crushing section 5 is composed of a single-shaft crusher 5X. As shown in the image diagram of FIG. 5, this single-shaft crusher 5X is equipped with a rotary blade 5c attached to a rotor 5b rotating inside a main body 5a and a fixed blade 5d attached to the main body 5a, and the production process waste pushed between them is cut and crushed to become a primary crushed product. The primary crushed product passes through a screen 5e attached to the main body 5a and is discharged from the bottom of the main body 5a. Since a pusher 5f that can move forward and backward is installed at an angle, the production process waste can be crushed by its own weight, and the processing capacity is high. Since it continues to be crushed until it becomes a size that can pass through the screen 5e, the primary crushed product that has passed through this primary crushing section 5 is divided into a certain size.

[0022] The primary crushing section 5 is equipped with a mist spray section 7. A number of spray nozzles 7a, 7a, ... are arranged at regular intervals above the axis of the rotor 5b. The nozzle hole of the spray nozzle 7a faces downward. A water supply line that supplies compressed water contained in a pipe 7b and an air supply line that supplies compressed air are connected to the spray nozzle 7a, forming a mist spray structure in which the water is sprayed as a mist. It is recommended to add a surfactant, preferably a neutral surfactant, to water to make a mist. This is because adding a surfactant increases the adsorption effect on dust that easily repels water, improving the dust prevention effect. It is preferable to add 0.1 to 1.0% of the surfactant to the water by weight. A significant addition effect is achieved by adding 0.1% or more, but if the addition amount exceeds 1.0%, the addition effect reaches a plateau and the cost-effectiveness is no longer comparable. In addition, it is recommended that the mist be sprayed under conditions where the weight ratio of the mist is 0.2 to 10.0% of the total amount of the primary crushed product, including the dust produced by crushing in the primary crushing section 5, and the particle size of the mist particles is 1 to 10 μm. This is because, within this range, the ultrafine mist particles are evenly, necessary, and sufficiently adsorbed to the dust. If the upper limit is exceeded, the dust becomes sticky, which may cause problems in subsequent transportation, sieving, etc. Note that, even if a surfactant is added, the weight of the surfactant is not included. However, since the mist particles are composed of water and surfactant, the particle size is that of the mist particles that are actually sprayed, including the surfactant.

[0023] The mist spraying effect in the primary crushing section 5 was tested, and the results of measurements made with a measuring device installed at the location indicated by the black star in Figure 1 are shown in the table below. A neutral surfactant was added to water at a weight ratio of 0.2%, and the mixture was sprayed at a weight ratio of 0.2 to 10.0% of the total amount of the primary crushed product, with the mist particles having a diameter of 1 to 10 μm. [Table 1] As shown in FIG. 3, the side of the single-shaft crusher 5X is covered with a vinyl curtain to form a booth 5g, which is opened only when waste from the production process is received. The mist spray section 7 and the booth 5g are employed as a measure against dust generation.

[0024] [Buffer section] The buffer section 9 is composed of a constant volume feeder 9X. This constant volume feeder 9X is composed of a storage section 9a and a feed screw 9b, as shown in the image diagram of Figure 6. The constant volume feeder 9X also has a stirring function, and the material in the storage section 9a is constantly stirred by the forward and reverse rotation of a stirring shaft (not shown) at regular intervals. After falling from the primary crushing section 5 through the conveying path 3, the primary crushed product is placed on the conveying conveyor 3a and conveyed therethrough, falls again through the conveying path 3, and is then introduced into the storage section 9a where it is temporarily stored. After that, the material is extruded in fixed increments by the constant speed rotation of the extrusion screw 9b. The extrusion screw 9b is installed so that the feed direction is horizontal, and the amount of material extruded can be adjusted by variable speed. Furthermore, by rotating forward and reverse, the extrusion can be stopped or the material can be reversed. A bucket 9c serving as a recovery container is disposed below the end in the reverse transport direction, and the primary crushed product transported backward falls into this bucket 9c and is recovered.

[0025] The temperature inside the storage portion 9a is monitored by a radiation thermometer (TG), and when a predetermined temperature is reached, the extrusion screw 9b is automatically stopped or reversed by automatic control. Therefore, if a fire occurs inside the constant volume feeder 9X, not only can the feed to the downstream be stopped, but the material can also be reversed and collected in bucket 9c, and removed at an intermediate stage in the recovery system 1, providing a countermeasure against fire. In addition, since the extrusion screw 9b can be reversed regardless of the temperature, it is also possible to take out the primary crushed product at this stage. Therefore, this recovery system 1 can be used to check the primary crushed product, and also to take out the packaging materials and other materials that are to be finally recovered after only the primary crushing at this stage. This has the same configuration as the transport gate section 15 described later, but differs in that it is integrated with the raw material feed section.

[0026] [Secondary crushing section] The secondary crushing section 11 is composed of a hammer mill 11X. As shown in detail in Fig. 7, this hammer mill 11X has a hopper 11a and a casing 11b connected together. The forward and reverse rotation of the rotor 11c allows the hammer 11d to be used on two sides, increasing the processing capacity. The primary crushed product cut out from the buffer section 9 falls through the conveying path 3 and is then fed into this hopper 11a. Inside the casing 11b, the primary crushed product is subjected to the impact action of the hammers 11d attached to the rotating rotor 11c rotating at high speed, and is further crushed into secondary crushed products, and the active material fixed to the current collector of the positive and negative electrode materials is peeled off and separated. The secondary crushed product passes through a screen 11e attached to the casing 11b and is discharged from the bottom of the casing 11b.

[0027] [Outdoor exhaust section] The outdoor exhaust section 13 is composed of a product recovery device 13X of a bag filter type. This product recovery device 13X is connected to a product recovery exhaust fan 13Y via an exhaust pipe 13a, and an air flow is formed with the upstream conveying path 3 serving as a suction path and the downstream exhaust pipe 13a serving as an exhaust path across the product recovery device 13X. This air flow is used not only for exhaust but also as a power source for conveying secondary crushed products. The secondary crushed products discharged from the casing 11b of the secondary crushing section 11 are transported inside the transport path 3 and, as shown in FIG. 1, are carried into the product recovery device 13X from the lower side.

[0028] The product recovery device 13X is installed outside the building together with the product recovery fan 13Y, and the secondary crushed products are exhausted through this product recovery device 13X to remove the explosive atmosphere. In addition, a release port 13b with a release valve specification is provided, and the release port 13b opens when the pressure exceeds a predetermined value. In this manner, the outdoor exhaust section 13 is provided as a measure against dust explosions. The lower part of the product recovery device 13X is a hopper, and the secondary crushed products fall along the inner surface thereof and are discharged.

[0029] [Transportation Gate] As shown in Fig. 2, the transport gate section 15 is composed of a product transport conveyor 15X. The product transport conveyor 15X is installed so that the inclination gradient is steeper on the forward side in the transport direction. The transport speed can be adjusted with a variable speed, and it is also possible to stop transport or reverse the transport by rotating forward and backward. A bucket 15a is disposed below the end in the reverse direction, and the secondary crushed product conveyed in the reverse direction falls into this bucket 15a and is collected. The secondary crushed products discharged from the product recovery device 13X are transported through the transport path 3 penetrating the wall of the building and placed on the product transport conveyor 15X.

[0030] The temperature inside the product recovery device 13X is monitored by a thermocouple (TC), and when a predetermined temperature is reached, the product transport conveyor 15X is automatically stopped or reversed by automatic control. Therefore, if a fire occurs inside the product recovery device 13X, it acts as a barrier to not only stop the downstream feed but also reverse the feed and recover the product in the bucket 15a, making it possible to remove the product at an intermediate stage of the recovery system 1, thus preventing fire. In addition, since the product transport conveyor 15X can be reversed regardless of the temperature, it is also possible to remove the secondary crushed product at this stage. This structure is similar to that of the constant volume feeder 9X.

[0031] [Classification Department] The classification section 17 is composed of a circular vibrating sieve 17X. This circular vibrating sieve 17X is of a three-dimensional vibration type, and classifies the products into undersieve products and oversieve products, which drop from the corresponding drop chutes 17a, 17b. The secondary crushed product conveyed from the product conveyor 15X falls through the conveying path 3 and is introduced into the circular vibrating sieve 17X for classification.

[0032] [Recovery Department] The recovery section 19 has a pair of hoppers 19a penetrating the top surface of the body, with the upper large opening of the hopper 19a being the receiving port and the lower small opening being the input port. The input port can be closed by a shutoff valve 19b. The drop chutes 17a, 17b enter the receiving openings of the hoppers 19a, 19a, respectively. FIBC keepers 19c, 19c are arranged corresponding to the hoppers 19a, 19a, respectively, and FIBC bags B, B are held in an independent state. The bag opening of this independently held FIBC bag B is closed so as to enclose the insertion opening of the hopper 19a, forming a recovery path.

[0033] The side of the structure is covered with a vinyl curtain to form a booth 19d. When the amount of the flexi-con bag B stored therein reaches a certain amount, the stop valve 19b is closed, the booth 19d is opened, and the flexi-con bag B is replaced. The shutoff valve 19b and the booth 19d are used as measures against dust generation. The undersize and oversize products are collected separately in FIBC bags B and B, respectively.

[0034] The curtain effect in the recovery section 19 was tested, and the results of measurements taken with measuring instruments installed at the locations indicated by black stars in Figure 1 are shown in the table below. [Table 2]

[0035] Each section is constructed as described above and has specifications to meet the requirements for measures against dust generation, dust explosions, and fires, and in addition, a local dust collecting section 21 is also provided. This local dust collector 21 is composed of a bag filter type environmental dust collector 21X. One side of this environmental dust collector 21X is connected to the environmental exhaust fan 21Y via an exhaust pipe 21a, and the other side is connected to a suction pipe 21b that branches into multiple parts. Therefore, the suction pipe 21b on the upstream side of the environmental dust collector 21X serves as a suction path, and the exhaust pipe 21a on the downstream side serves as an exhaust path, forming an air flow.

[0036] The environmental dust collector 21X and the environmental exhaust fan 21Y are installed outside the building, and the suction pipe 21b penetrates the wall of the building. The dust collection port 21c of the suction pipe 21b is arranged at a location where dust is expected to be generated in the building. Specifically, as shown in Fig. 1, it is arranged near the inlet and outlet of the uniaxial crusher 5X into which the production process waste is input, near the inlet of the constant quantity feeder 9X, near the inlet of the hammer mill 11X, near the front and rear ends in the feed direction of the product transport conveyor 15X, and further in the booth 19d of the recovery section 19. In Fig. 4, for easy visual recognition, the vicinity of the inlet and outlet of the uniaxial crusher 5X into which the production process waste is input and the vicinity of the inlet of the constant quantity feeder 9X are circled.

[0037] In order to prevent the spread of fire, slide gates 3b are provided on the transport path 3 connecting the transfer conveyor 3a and the constant volume feeder 9X, and on the transport path 3 connecting the constant volume feeder 9X and the hammer mill 11X.

[0038] A baby compressor (compressor) 23 is also installed and is used to sift collected dust particles from the filter cloth of the product recovery device 13X and the environmental dust collector 21X.

[0039] Figure 8 shows photographs of the aluminum positive electrode body and active material of the positive electrode material, and the copper negative electrode body and carbon (active material) of the negative electrode material recovered using this recovery system 1. The active material of the positive electrode material contains cobalt and nickel. According to this collection system 1, these items are safely and efficiently collected separately.

[0040] Although the embodiments of the present invention have been described in detail above, the specific configuration is not limited to these embodiments, and the invention also includes design changes within the scope of the present invention without departing from the gist of the present invention. For example, it is recommended that the mist spray unit 7 be installed not only in the primary crushing unit 5 but also in the secondary crushing unit 11 if possible due to the structure of the equipment, and there are no particular restrictions on the installation location or number of units. Furthermore, the specific structure and capacity of the equipment constituting each part, as well as the operating conditions thereof, are not particularly limited as long as they can exert the functions envisaged in the present invention. [Explanation of symbols]

[0041] 1. Valuable metal recovery system from lithium-ion secondary battery production waste 3...Transport path 3a...Transport conveyor 3b...Slide gate 5...Primary crushing section 5X: Single-shaft crusher 5a: Main body 5b: Rotor 5c: Rotary blade 5d…Fixed blade 5e…Screen 5f…Pusher 5g…Booth 7...Mist spray section 7a...Spray nozzle 7b...Pipe 9...Buffer section 9X: Fixed quantity feeder 9a: Storage section 9b: Cutting screw 9c...Bucket TG...Radiation thermometer 11...Secondary crushing section 11X...hammer mill 11a...hopper 11b...casing 11c...rotor 11d...Hammer 11e...Screen 13...Outdoor exhaust section 13X...Product recovery device TC...Thermocouple 13a...Exhaust pipe 13b...Dissipation port 13Y: Product recovery fan 15: Transport gate 15X: Product transport conveyor 15a: Bucket 17: Classifier 17X: Circular vibrating screen 17a, 17b: Drop chute 19: Collection section 19a...Hopper 19b...Shut-off valve 19c...Flexible container keeper 19d…Booth B…Flexible container bag 21…Local dust collection section 21X…Environmental dust collector 21Y…Environmental exhaust fan 21a…Exhaust pipe 21b...suction pipe 21c...dust collection port 23...babycon

Claims

1. In a system for recovering valuable metals from lithium-ion secondary battery production waste, This recovery system is characterized in that, from the production process waste receiving side, the following sections are arranged on the transport path, in that order: primary crushing section, buffer section, secondary crushing section, outdoor exhaust section, transport gate section, classification section, and recovery section, and each section and the transport path are constructed with an enclosed structure, except for open sections necessary for processing.

2. In the system for recovering valuable metals from lithium ion secondary battery production process waste according to claim 1, A recovery system comprising a product recovery device having an outdoor exhaust section with a diffusion port and installed outside a building.

3. In the system for recovering valuable metals from lithium ion secondary battery production process waste according to claim 2, The conveying gate section is a recovery system characterized by a temperature monitoring function that monitors the temperature inside the main body of the product recovery device, and a function to stop and / or reverse the conveying path connecting the product recovery device and the classification section, thereby stopping the conveying of secondary crushed products to the classification section due to an increase in temperature.

4. In the system for recovering valuable metals from lithium ion secondary battery production process waste according to any one of claims 1 to 3, The buffer section is composed of a constant volume feeder, and the recovery system is characterized by a temperature monitoring function that monitors the temperature inside the constant volume feeder, and a function for stopping and / or reversing the conveying path provided in the constant volume feeder, which stops the conveying of the primary crushed product to the secondary crushing section due to a rise in temperature.

5. In the system for recovering valuable metals from lithium ion secondary battery production process scraps according to claim 3 or 4, A recovery system characterized in that a recovery container is disposed at the reverse destination of the conveying path, and the primary crushed product or secondary crushed product that has been reversed is recovered in the recovery container.

6. In the system for recovering valuable metals from lithium ion secondary battery production process scraps according to any one of claims 1 to 5, A recovery system characterized in that an environmental dust collector is installed outside a building and dust collection ports connected to the environmental dust collector are arranged at multiple locations within the building where dust is expected to be generated, resulting in a local dust collection structure.

7. In the system for recovering valuable metals from lithium ion secondary battery production process scraps according to any one of claims 1 to 6, A recovery system characterized in that any one or more of the sections is equipped with a water mist spray structure.

8. In the system for recovering valuable metals from lithium ion secondary battery production process scraps according to claim 7, A recovery system that sprays mist made by adding a surfactant to water.

9. In the system for recovering valuable metals from lithium ion secondary battery production process scraps according to claim 7 or 8, A recovery system characterized in that the mist is sprayed at a weight ratio of 0.2 to 10.0% relative to the object to be sprayed, and the mist particles have a diameter of 1 to 10 μm.

10. In the system for recovering valuable metals from lithium ion secondary battery production process scraps according to any one of claims 1 to 9, A recovery system characterized in that the primary crushing section and / or the recovery section are covered with an openable and closable booth after receiving production process waste.

11. In the system for recovering valuable metals from lithium ion secondary battery production process waste according to any one of claims 1 to 10, A recovery system characterized in that positive and negative electrode materials are treated.

12. In the system for recovering valuable metals from lithium ion secondary battery production process scraps according to claim 11, A recovery system characterized in that the object of treatment is a positive electrode material containing a substance that is subject to regulation under the Special Measures Act.

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