Processing method for electronic and electrical equipment component scraps

Abstract

Provided is a processing method for electronic and electrical equipment component scraps, which can increase the processing amount of electronic and electrical equipment component scraps processed in a smelting step and can efficiently recover valuable metals. The processing method of the electronic and electrical equipment part scraps comprises a step of processing the electronic and electrical equipment part scraps in a smelting step, and the processing method of the electronic and electrical equipment part scraps comprises a step of reducing smelting hindering substances contained in the electronic and electrical equipment part scraps before the smelting step.

Description

[0001] This application is a divisional application of the invention patent application with an international filing date of January 30, 2019, international application number PCT / JP2019 / 003242, priority date of January 31, 2018, application number 201980011068.0, and invention title "Method for processing debris of electronic and electrical equipment components". Technical Field

[0002] This invention relates to a method for processing electronic and electrical equipment component debris, and more particularly to a method for processing electronic and electrical equipment component debris suitable for the reuse of used electronic and electrical equipment. Background Technology

[0003] In recent years, from the perspective of resource conservation, the recovery of valuable metals from waste household appliances, PCs, or mobile phone electronic and electrical equipment components has become increasingly popular, and efficient recycling methods have been researched and proposed.

[0004] For example, Japanese Patent Application Publication No. 9-78151 (Patent Document 1) discloses a method for recycling valuable metals, which includes a process of loading waste containing valuable metals into a copper ore smelting furnace and recovering the valuable metals from impurities remaining in the furnace. According to this recycling method, waste treatment can be combined with copper smelting in a copper smelting furnace, thus enabling the low-cost recovery of valuable metals even from waste with low valuable metal content.

[0005] However, in the copper smelting furnace process described in Patent Document 1, if the amount of electronic and electrical equipment component scraps processed increases, the carbon content in the organic materials such as synthetic resins that constitute the electronic and electrical equipment component scraps increases, sometimes causing malfunctions in the smelting furnace due to over-reduction. On the other hand, since the amount of electronic and electrical equipment component scraps processed has tended to increase in recent years, efficient processing of copper smelting furnaces is desired.

[0006] As one method to prevent malfunctions caused by over-reduction in copper smelting furnaces, a method has been proposed to reduce the volume of electronic and electrical equipment component scraps before processing them in a copper smelting furnace. For example, Japanese Patent Application Publication No. 2015-123418 (Patent Document 2) describes a method in which copper-containing electronic and electrical component scraps are burned, then crushed to a specified size or smaller, and processed in a copper smelting furnace.

[0007] However, due to the increased volume of electronic and electrical equipment component scraps, more substances that are undesirable in subsequent copper smelting processes (smelting hindrance substances) are being added compared to the past, depending on the types of substances contained in these scraps. If the amount of smelting hindrance substances introduced into such copper smelting processes increases, it becomes necessary to limit the amount of electronic and electrical equipment component scraps that are added.

[0008] Various studies have been conducted on thermodynamic methods in the copper smelting process and refining methods for the electrolyte in the electrolysis process, including smelting slag containing smelting slag from natural ores. However, there are still many issues to be addressed in the treatment of electronic and electrical equipment component scraps, which contain a significantly higher proportion of smelting slag slag compared to natural ores.

[0009] Existing technical documents

[0010] Patent documents

[0011] Patent Document 1: Japanese Patent Application Publication No. 9-78151

[0012] Patent Document 2: Japanese Patent Application Publication No. 2015-123418 Summary of the Invention

[0013] The problem that the invention aims to solve

[0014] In view of the above-mentioned problems, the present invention provides a method for processing electronic and electrical equipment component scraps that can increase the processing capacity of electronic and electrical equipment component scraps in the smelting process and can efficiently recover valuable metals.

[0015] Methods for solving problems

[0016] In order to solve the above-mentioned problems, the inventors conducted in-depth research and obtained the following insights: it is effective to carry out treatment to prevent the introduction of smelting-impeding substances contained in electronic and electrical equipment component scraps into the smelting process.

[0017] Based on the above insights, the present invention provides a method for processing electronic and electrical equipment component scraps. The method includes a step of processing the electronic and electrical equipment component scraps in a smelting process, and the method includes a step for reducing smelting-impeding substances contained in the electronic and electrical equipment component scraps before the smelting process.

[0018] In the processing method of the embodiments of the present invention, smelting hindrance substances refer to a general term for substances that affect the quality of products and by-products in copper smelting and / or affect the copper smelting process.

[0019] Specific examples of substances that hinder smelting include: substances containing elements such as antimony (Sb) and nickel (Ni) that affect the quality and specifications of electrolytic copper products; elements that limit the melting and precipitation standards of slag, a byproduct; sources of fine hydrocarbon particles that affect the coloring of sulfuric acid; resins that, in addition to intense combustion and smoke leakage in the furnace, affect equipment deterioration caused by localized heating; elements such as aluminum (Al) and iron (Fe) that alter the slag composition in the copper smelting process and affect the loss of valuable metals to the slag, i.e., slag loss; and halogen elements such as chlorine (Cl), bromine (Br), and fluorine (F) that corrode waste gas treatment equipment and affect the deterioration of sulfuric acid catalysts.

[0020] In one embodiment of the method for processing electronic and electrical equipment component scraps of the present invention, the amount of smelting-impeding substances contained in the electronic and electrical equipment component scraps is reduced, and correspondingly, the amount of electronic and electrical equipment component scraps processed in the smelting process is increased.

[0021] In another embodiment of the method for treating electronic and electrical equipment component scraps of the present invention, a step for reducing smelting-impeding substances contained in the electronic and electrical equipment component scraps is performed before incineration.

[0022] In other embodiments of the method for processing electronic and electrical equipment component debris of the present invention, the step for reducing smelting obstacles includes: removing component debris containing smelting obstacles from electronic and electrical equipment component debris on a component-by-component basis.

[0023] In other embodiments of the method for treating electronic and electrical equipment component debris of the present invention, the process for reducing smelting obstacles includes: sorting and removing component debris containing smelting obstacles by component unit through a physical sorting process.

[0024] In other embodiments of the method for treating electronic and electrical equipment component debris of the present invention, the smelting hindrance substance includes a substance containing Sb.

[0025] In other embodiments of the method for treating electronic and electrical equipment component debris of the present invention, the smelting hindrance substance includes a substance selected from the group consisting of Sb, Al, Fe, and Ni.

[0026] In other embodiments of the method for treating electronic and electrical equipment component debris of the present invention, the process for reducing smelting hindrance substances includes removing synthetic resins containing Sb.

[0027] In other embodiments of the method for processing electronic and electrical equipment component debris of the present invention, the steps for reducing smelting hindrance substances include: performing at least two stages of air separation on the electronic and electrical equipment component debris to remove at least powdery and film-like component debris from the electronic and electrical equipment component debris; and using a metal sorting machine to remove synthetic resins from the electronic and electrical equipment component debris that has been sorted into weights during air separation.

[0028] In other embodiments of the method for processing electronic and electrical equipment component debris of the present invention, the smelting process includes a copper smelting process using a smelting furnace.

[0029] In other embodiments of the method for processing electronic and electrical equipment component scraps of the present invention, the process of processing electronic and electrical equipment component scraps in the smelting process includes: a process of incinerating the electronic and electrical equipment component scraps, a process of crushing and screening the incinerated material, and a process of smelting copper on the processed material after crushing and screening.

[0030] Invention Effects

[0031] According to the present invention, a method for processing electronic and electrical equipment component scraps can be provided, which can increase the processing capacity of electronic and electrical equipment component scraps processed in the smelting process and can efficiently recover valuable metals. Detailed Implementation

[0032] The embodiments of the present invention will be described below.

[0033] -Smelting Process-

[0034] The method for processing electronic and electrical equipment component scraps according to embodiments of the present invention includes a step of processing electronic and electrical equipment component scraps in a smelting process for recycling valuable metals.

[0035] In cases where copper is recycled as a valuable metal, a smelting process using a smelting furnace is performed. This smelting process includes: incinerating electronic and electrical equipment component scraps, crushing and screening the incinerated material, and smelting copper from the crushed and screened material. Preferably, the process of treating the electronic and electrical equipment component scraps is performed before the incineration process.

[0036] While not limited to the following, the smelting process of this embodiment can, for example, be a copper smelting process using a self-smelting furnace method. In this copper smelting process using a self-smelting furnace method, for example, copper concentrate, solvent, and electronic / electrical equipment component scraps are charged from the top of the furnace body. The charged concentrate and electronic / electrical equipment component scraps are melted in the furnace body and separated in the furnace's setter into, for example, impure metals containing 50-68% copper and slag floating above these impure metals. Valuable metals such as copper, gold, and silver in the electronic / electrical equipment components are absorbed by the impure metals retained in the furnace, thereby enabling the recovery of valuable metals from the electronic / electrical equipment component scraps.

[0037] In copper smelting, in order to recover more precious metals such as gold and silver as raw materials while producing copper, it is important to process electronic and electrical equipment parts with a high content of valuable metals such as copper, gold, and silver.

[0038] On the other hand, electronic and electrical equipment component scraps contain substances that affect the quality of products and by-products in copper smelting and / or substances that hinder the copper smelting process. For example, if the amount of substances containing elements such as antimony (Sb) and nickel (Ni) added to the smelting furnace increases, the quality of electrolytic copper obtained through copper smelting may sometimes decrease.

[0039] Furthermore, in non-ferrous metal smelting processes such as copper smelting, sulfuric acid is produced from sulfur dioxide generated by the oxidation of concentrates. However, if hydrocarbons are mixed into the sulfur dioxide, the resulting sulfuric acid can sometimes be discolored. Examples of sources of hydrocarbon contamination include synthetic resins such as plastics; however, depending on the structure of electronic and electrical equipment component debris introduced into copper smelting, it can sometimes contain significant amounts of such synthetic resins. Besides the rapid combustion and fume leakage within the smelting furnace, synthetic resins also pose a risk of equipment degradation due to localized heating.

[0040] Furthermore, when Al, Fe, and other elements exist at concentrations exceeding a certain level in the smelting furnace, for example, in copper smelting processes, they can alter the slag composition and affect the loss of valuable metals to the slag, a phenomenon known as slag loss. Additionally, when the electronic and electrical equipment component scraps fed into the smelting furnace contain significant amounts of halogen elements such as Cl, Br, and F, they can sometimes cause corrosion of the copper smelting waste gas treatment equipment and deterioration of the sulfuric acid catalyst. This problem of smelting hindrance due to the contamination of electronic and electrical equipment component scraps becomes more pronounced with increasing volumes, thus placing a burden on the smelting process.

[0041] According to an embodiment of the present invention, a method for processing electronic and electrical equipment component scrap includes a step before the smelting process to reduce smelting-impeding substances contained in the electronic and electrical equipment component scrap. This effectively suppresses the proportion of smelting-impeding substances introduced into the smelting process and reduces the amount of smelting-impeding substances contained in the electronic and electrical equipment component scrap, thereby increasing the amount of electronic and electrical equipment component scrap processed in the smelting process. That is, conventionally, when the content of smelting-impeding substances in electronic and electrical equipment component scrap is high, only a certain amount of electronic and electrical equipment component scrap can be added to ensure stable operation of the smelting process. However, according to the processing method of the present invention, the step before the smelting process includes a step to reduce the smelting-impeding substances contained in the electronic and electrical equipment component scrap, thereby increasing the amount of electronic and electrical equipment component scrap processed compared to the past, and increasing the proportion of electronic and electrical equipment component scrap containing copper and valuable metals, thereby efficiently recovering copper and valuable metals.

[0042] While it is desirable to remove as much smelting-impeding material as possible from electronic and electrical equipment component scrap, some scrap may contain both smelting-impeding material and valuable metals. Although not limited to the following, by removing 1 / 2, more preferably 2 / 3 or more, of the smelting-impeding material from the raw material of electronic and electrical equipment component scrap by weight, it is possible to stably process electronic and electrical equipment component scrap in the copper smelting process. Furthermore, if the maximum amount of smelting-impeding material that can be processed in the smelting process remains the same, by reducing the overall smelting-impeding material content of the raw material of electronic and electrical equipment component scrap, it is possible to process more electronic and electrical equipment component scrap with less smelting-impeding material in the copper smelting process.

[0043] In embodiments of the present invention, electronic and electrical equipment component shavings contain a mixture of various types of component shavings, and the proportions of metals, plastics, etc., vary depending on the type of electronic and electrical equipment component shavings supplied. When such electronic and electrical equipment component shavings are processed in a smelting process, an effective method for reducing smelting impediments introduced into the smelting process was studied. The results showed that separating electronic and electrical equipment components by component and selectively removing component shavings containing smelting impediments by component is effective.

[0044] One method for removing component debris containing smelting obstacles on a component-by-component basis is, for example, a physical sorting process using a prescribed physical sorting device. By employing a physical sorting process using a physical sorting device, compared to the conventional method of incinerating or pulverizing all raw materials of electronic and electrical equipment component debris before smelting, the amount of raw material accepted into the smelting process can be increased by approximately two times or more, and the burden on the smelting process can also be reduced. Furthermore, for example, compared to selectively extracting smelting obstacles from the incinerator or powder obtained after incinerating or pulverizing all electronic and electrical equipment component debris, sorting efficiency is improved.

[0045] -Physical sorting process-

[0046] In this invention, "electronic and electrical equipment component scraps" refers to scraps obtained by crushing waste household appliances, PCs, or mobile phones, and specifically refers to scraps that have been crushed to an appropriate size after recycling. In this invention, the crushing process for generating electronic and electrical equipment component scraps can be carried out by the processor itself, or it can be obtained by purchasing locally sourced crushed materials.

[0047] The crushing method is not limited to a specific device; it can be either shearing or impact crushing, but the aim is to crush the parts without damaging their shape as much as possible. Therefore, devices belonging to the category of pulverizers intended for fine crushing are not included.

[0048] The electronic and electrical equipment component debris of this embodiment can be classified into synthetic resin (plastic) used in substrates, components, housings, etc., wire debris, metal, film-like component debris, powder generated by crushing or pulverizing, and component debris composed of other materials, and can be classified more finely according to the processing purpose. Although not limited to the following, this embodiment can appropriately process electronic and electrical equipment component debris that has been crushed to a particle size of 50 mm or less and whose individual component debris separation ratio is 70% or more.

[0049] In the physical sorting process, in one embodiment, it is preferable to remove component debris containing Sb, or substances containing one or more of the group consisting of Sb, Al, Fe, and Ni, which act as smelting obstacles. To remove Sb-containing substances, the effects of the present invention can be achieved by removing Sb-containing synthetic resins. Examples of component debris including Sb-containing synthetic resins include debris from printed circuit boards without wiring, and cover layers of conductive lines.

[0050] This method aims to remove metals such as iron, aluminum, and SUS that contain one or more substances selected from Al, Fe, and Ni, which are considered smelting obstacles. Through the following physical sorting process, these component debris are selectively removed on a per-component basis, thereby minimizing the introduction of smelting obstacles contained in electronic and electrical equipment component debris.

[0051] In addition, substances containing a relatively high amount of halogen elements such as Cl, Br, and F can be listed as vinyl chloride resin, or synthetic resins such as Teflon (registered trademark) and heat-resistant ABS. By selectively removing the above substances, smelting obstacles in electronic and electrical equipment component scraps can be effectively removed.

[0052] As a physical sorting method, the preferred methods are a wind sorting process that performs at least two stages of wind sorting on raw materials, i.e., electronic and electrical equipment component scraps, and a sorting process based on a metal sorting machine.

[0053] (1) First wind sorting process

[0054] Wind sorting is one of many physical sorting methods suitable for processing multiple quantities of materials, and it is preferably used in the initial stage of physical sorting methods. In the physical sorting method of this embodiment, it is preferable to perform at least two stages of wind sorting in the initial stage.

[0055] In the first air separation process, powdery and film-like component debris (film resin, aluminum foil, etc.) that could adversely affect subsequent separation processes are separated from the raw material, namely electronic and electrical equipment component debris. The first air separation process is a pretreatment process that serves as a pretreatment for subsequent processes and is positioned as coarse separation.

[0056] The air separation process is divided into light materials and heavy materials. Light materials, namely powders and film-like component scraps (resin, aluminum foil, etc.), are sent to the copper smelting process after passing through the incineration pretreatment process, while heavy materials are sent to the next process, namely the second air separation process.

[0057] While not limited to the following conditions, the airflow of the first air separator can be set to 5 to 20 m / s, more preferably 5 to 12 m / s, then to about 5 to 10 m / s, and further to 6 to 8 m / s.

[0058] (2) Second wind sorting process

[0059] In the second air-powered sorting process, bulk metals and individual components are separated as heavy items, while substrates, plastics, and other synthetic resins are concentrated on the lighter side. The substrates and synthetic resins concentrated on the lighter side are then sent to the next process, where they are sorted using a metal sorting machine.

[0060] While not limited to the following conditions, for example, the airflow of the second wind separator can be set to 5 to 20 m / s, more preferably to 10 to 18 m / s, then to 15 to 18 m / s, and further to around 16 to 17 m / s.

[0061] (3) Sorting process using a metal sorting machine

[0062] The metal sorting machine is equipped with a metal sensor for detecting metal objects in the processing objects and a sensor for detecting the position of the processing objects. The metal sorting machine is a device used to knock down designated items (metal or non-metal) using airflow from an air valve. In this embodiment, the metal sorting machine sorts substrates that substantially contain metal (metal objects), substrates that substantially do not contain metal, and synthetic resins (non-metal objects). When non-metal objects are knocked down as designated items, substrates containing valuable metals such as copper and precious metals are concentrated on the side of the sorted material that is not knocked down by the metal sorting machine. Therefore, these substrates are used as processing objects in the aforementioned smelting process, thereby improving the recovery efficiency of valuable metals with less component waste input.

[0063] For metal sorting machines, if powdery substances are mixed in with the items being processed, the powder can sometimes become airborne during sorting, reducing the camera's field of view and making it difficult to remove specific items using the camera. According to the method of the present invention, powdery substances and film-like component debris contained in electronic and electrical equipment component debris, which are the cause of reduced sorting efficiency in metal sorting processes, are removed in the first air-powered sorting step. Therefore, it is possible to suppress malfunctions of the metal sorting machine and the reduction in sorting efficiency caused by powdery substances flying during processing.

[0064] Furthermore, according to an embodiment of the present invention, by means of a second wind-powered sorting process and a metal sorting machine, a substrate containing a large amount of valuable metals can be concentrated, thereby improving the recovery efficiency of valuable metals with less component scrap in the subsequent copper smelting process.

[0065] In conventional physical sorting methods for concentrating metals, metal recovery is initially achieved through magnetic separation or similar processes. However, components with high valuable content are often magnetic, resulting in extremely low separation efficiency from smelting obstacles. Furthermore, the throughput of magnetic separation devices is limited per unit time, making it difficult to sort large quantities of component debris. According to the processing method of this invention, in the initial stage of physical sorting, air separation is performed in two stages, enabling the sorting of a large quantity of component debris at once. Therefore, compared to performing magnetic separation or similar processes in the initial stage of sorting, more electronic and electrical equipment component debris (raw materials) can be sorted. Moreover, after the two stages of air separation, a time-consuming metal sorting machine is combined, thereby increasing the throughput of electronic and electrical equipment component debris while removing smelting obstacles, thus efficiently recovering valuable metals.

[0066] (Other sorting processes)

[0067] In addition to the sorting processes described above, the following sorting processes can also be appropriately combined. For example, depending on the type of electronic or electrical equipment component debris, it is sometimes easy to identify a large amount of wire debris even by visual inspection. In this case, larger wire debris can be mechanically sorted by manual sorting or robots before the first air-based sorting process.

[0068] If the powder cannot be adequately separated by the first air separation process, a screening process is preferably added between the first and second air separation processes, or after the second separation process, to further separate and remove the powder. The screen used in the screening process is preferably a slit-shaped mesh with elongated holes in the direction of travel; in this case, wire shavings can also be removed. The screened powder and wire shavings are then sent to the copper smelting process via a pre-incineration treatment process, thereby enabling more efficient recovery of valuable metals from the component shavings.

[0069] Sometimes, the weights obtained through the second air separation process contain some substrate scraps that should be processed in the copper smelting process. Therefore, the weights obtained through the second air separation can be further classified using magnetic separation, eddy current separation, color sorting machines, etc.

[0070] A high metal content ratio indicates the presence of a significant amount of metal-containing component debris. When non-metallic materials such as synthetic resins are present between the metal and the detected component debris, this gap may sometimes be misdetected as metal by the metal sensor if it falls within the sensor's detection range. Conversely, non-metallic materials like plastics or synthetic resins located between metal objects may not be released by the air valve and are treated as metal. Therefore, performing separation using methods such as magnetic separation, eddy current separation, or color sorting before using a metal sorting machine reduces the metal content ratio, thereby suppressing false detections by the metal sorting machine.

[0071] For the substrates sorted in the second air-powered sorting process, even after components have been removed, the leads connecting the components to the substrate often remain. These leads are mostly made of iron, nickel, or iron-nickel alloys, which are strongly magnetic materials. Following the second air-powered sorting process, a high-magnetic-force sorting process is combined to remove substrates with residual leads, thereby reducing the metal content in the materials sent to the metal sorting machine beforehand. Color sorters are sorting machines that distinguish objects by color; they can identify metallic colors, the green of substrates, and the black and white of synthetic resins. Therefore, by using color sorters, the metal content in the materials sent to the metal sorting machine can be reduced beforehand.

[0072] It should be noted that, in the embodiments of the present invention, "removal" or "separation" not only refers to a method of removing or separating 100%, but also includes a method of removing 30% or more by weight of the object, more preferably 50% or more by quality.

[0073] According to an embodiment of the present invention, a method for processing electronic and electrical equipment component scraps is provided, which includes a step of sorting and removing component scraps containing smelting-impeding substances in the component scrap state by component before pulverizing the electronic and electrical equipment component scraps into powder through a smelting process. This increases the amount of electronic and electrical equipment component scraps processed in the smelting process and efficiently recovers valuable metals.

Claims

1. A method of processing electronic and electric equipment component scraps, characterized by comprising processing electronic and electric equipment component scraps in a smelting process, the method of processing electronic and electric equipment component scraps includes processing electronic and electric equipment component scraps in a smelting process, the smelting process includes a process of crushing and sieving the electronic and electric equipment component scraps, and a process of smelting copper from the processed product subjected to the crushing and sieving process, a process for reducing smelting hindering substances contained in the electronic and electric equipment component scraps is included before the process of crushing and sieving the electronic and electric equipment component scraps and the process of smelting copper from the processed product subjected to the crushing and sieving process, the process for reducing smelting hindering substances includes: first air separation of the electronic and electric equipment component scraps containing metals, powdery materials, film-like component scraps, substrates, and synthetic resins, thereby removing at least the powdery materials and the film-like component scraps from the electronic and electric equipment component scraps; second air separation of the electronic and electric equipment component scraps from which the powdery materials and the film-like component scraps are removed in the first air separation, to separate heavy materials containing the metals and light materials containing the substrates and the synthetic resins; and removal of the synthetic resins as non-metallic materials from the electronic and electric equipment component scraps using a metal classifier provided with a first sensor for detecting metallic materials in the light materials and a second sensor for detecting positions of the light materials, and separating the metallic materials containing the substrates or the non-metallic materials containing the synthetic resins in the light materials by air flow from an air valve, for the electronic and electric equipment component scraps separated as the light materials in the second air separation.

2. The method of processing electronic and electric equipment component scraps according to claim 1, characterized in that, sieve separation is performed between the first air separation and the second air separation, and the powdery materials are subjected to a separation process using a slit-like net having long holes in a traveling direction.

3. The method of processing electronic and electric equipment component scraps according to claim 1 or 2, characterized in that, the smelting process includes a process of incinerating the electronic and electric equipment component scraps before the process of crushing and sieving the electronic and electric equipment component scraps.

4. The method of processing electronic and electric equipment component scraps according to claim 1 or 2, characterized in that, the smelting hindering substances contained in the electronic and electric equipment component scraps are reduced, and accordingly, the amount of the electronic and electric equipment component scraps subjected to the processing in the smelting process is increased.

5. The method of processing electronic and electric equipment component scraps according to claim 1 or 2, characterized in that, the process for reducing smelting hindering substances includes removal of component scraps containing the smelting hindering substances from the electronic and electric equipment component scraps.

6. The method of processing electronic and electric equipment component scraps according to claim 1 or 2, characterized in that, The process for reducing the smelting hindering substance includes sorting and removing the component chips containing the smelting hindering substance through a physical sorting process.

7. The electronic and electrical equipment component chip treatment method according to claim 1 or 2, characterized in that, The smelting hindering substance includes a substance containing Sb.

8. The electronic and electrical equipment component chip treatment method according to claim 1 or 2, characterized in that, The smelting hindering substance includes a substance containing one or more selected from the group consisting of Sb, Al, Fe, and Ni.

9. The electronic and electrical equipment component chip treatment method according to claim 1 or 2, characterized in that, The process for reducing the smelting hindering substance includes removing synthetic resins containing Sb.

10. The electronic and electrical equipment component chip treatment method according to claim 1 or 2, characterized in that, The smelting process includes a copper smelting process using a self-smelting furnace.

11. The electronic and electrical equipment component chip treatment method according to claim 1 or 2, characterized in that, The air volume of the first air sorting is 5 to 10 m / s, and the air volume of the second air sorting is 15 to 18 m / s.