KR20020057939A - Precious metals abstraction means from electronic scrap - Google Patents

Precious metals abstraction means from electronic scrap Download PDF

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Publication number
KR20020057939A
KR20020057939A KR1020020035952A KR20020035952A KR20020057939A KR 20020057939 A KR20020057939 A KR 20020057939A KR 1020020035952 A KR1020020035952 A KR 1020020035952A KR 20020035952 A KR20020035952 A KR 20020035952A KR 20020057939 A KR20020057939 A KR 20020057939A
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scrap
metals
gold
precious metals
waste
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KR1020020035952A
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Korean (ko)
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박종진
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박종진
주식회사 세이퍼컴퓨터
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Priority to KR1020020035952A priority Critical patent/KR20020057939A/en
Publication of KR20020057939A publication Critical patent/KR20020057939A/en

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    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22BPRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/20Recycling

Abstract

PURPOSE: A method for extracting precious metals from scrap of electronic products is provided to recover pure gold by dissolving other metals mixed with gold into ions using a minimum quantity of nitric acid, and treat the resulting solution into a nontoxic solution by removing other metals and neutralizing the remaining solution. CONSTITUTION: In a method for recovering precious metals including Au and Ag and valuable metals such as Cu, Ni and Sn from scrap of defective semiconductors generated during fabrication of IC chips and scrap collected from waste computers, the method for extracting the precious metals from the scrap of electronic products comprises the processes of separating precious metals only from the pulverized materials after pulverizing the waste scrap by putting waste scrap into a pulverizer; and water washing the gold parts remained after dissolving metallic constituents except gold using a nitric acid.

Description

전자 스크랩으로부터의 새로운 귀금속 추출 방법{Precious metals abstraction means from electronic scrap}Precious metals abstraction means from electronic scrap

본 발명은 전자(반도체)스크랩으로 부터의 새로은 귀금속 추출 방법에 관한 것으로서, 보다 상세하게는 국내의 전자 회사에서 배출되는 IC 칩 제조 공정에서 발생하는 불량반도체 스크랩 그리고 폐 컴퓨터에서 수집되는 스크랩으로부터 종전에 사용되어 오던 방법과는 달리 폐스크랩을 파쇄기에 넣어 파쇄한 후 귀금속만을 따로 분리한 후, 이 귀금속류에서 습식방법에 의하여 금을 분리해내는 방법에 관한 것이다.The present invention relates to a new method of extracting precious metals from electronic (semiconductor) scrap, and more particularly, from the defects of defective semiconductor scrap generated in the IC chip manufacturing process discharged from domestic electronic companies and scrap collected from waste computers. Unlike the method that has been used, the waste scrap is put in a crusher and then separated, and only the precious metals are separated separately, and the method of separating gold from the precious metals by a wet method.

국내의 전자산업이 발달함에 따라 전자스크랩의 (electronic scrap) 발생량이 급격히 증가하고 있다. 전자스크랩이란 전자제품의 제조시에 발생하는 불량품 또는 컴퓨터, printed circuit board와 connector, cabling, 플라스틱 또는 금속 케이스 등과 같은 사용 전자제품의 폐기시에 발생하는 폐기물을 가르킨다.As the domestic electronics industry develops, the amount of electronic scrap generation is increasing rapidly. Electronic scrap refers to waste products generated during the manufacture of electronic products, or wastes generated from the disposal of electronic products used such as computers, printed circuit boards and connectors, cabling, plastic or metal cases.

전자스크랩은 일반적으로 플라스틱이 30%, 난용성 산화물이 40%, 금속이 30% 정도로 구성되어 있다. 금속 성분은 Cu, Fe, Ni, Sn, Pb, Al, Zn 등의 일반금속과 Au, Ag, Pd 등과 같은 귀금속으로 나누어 지는데 함유량은 Cu(10%),Fe(8%),Ni(2%), Sn(4%), Pb(2%), Al(2%), Zn(1%)이고, Au(~0.1%), Ag(~0.2%), Pd(~0.005%) 정도 함유되어 있다.Electronic scrap is generally composed of 30% of plastic, 40% of poorly soluble oxide, and 30% of metal. Metal components are divided into general metals such as Cu, Fe, Ni, Sn, Pb, Al, and Zn, and precious metals such as Au, Ag, Pd, and the content is Cu (10%), Fe (8%), Ni (2% ), Sn (4%), Pb (2%), Al (2%), Zn (1%), and Au (~ 0.1%), Ag (~ 0.2%), Pd (~ 0.005%) have.

전자스크랩이 도시 광석이라 불리우며 오래 전부터 재활용의 대상이 된 것은 귀금속을 함유하고 있는 경제적인 가치 때문이다. 또한 Cu, Fe, Ni, Al, Sn 등도 함유하고 있어 재활용의 대상이 되고 있으며 제련소의 원료로 사용되고 있다. 이와 같이 여러 유가금속들을 함유하고 있는 전자스크랩은 자원이 절대적으로 부족하여 거의 모든 종류의 금속을 수입에 의존하고 있는 실정인 우리나라로서는 훌륭한 자원이라 할 수 있겠다. 이 중에서 특별히 Au, Ag, Pd 등과 같은 귀금속은 그 자원이 한정되어 있으며 고가이기 때문에 귀금속 원으로서 매우 중요한 자원으로 고려된다.Electronic scrap is called urban ore and has long been the subject of recycling because of its economic value containing precious metals. It also contains Cu, Fe, Ni, Al, Sn, etc., and is being recycled and used as a raw material for smelters. As such, the electronic scrap containing various valuable metals is an excellent resource for Korea, which is a situation in which almost all kinds of metals are dependent on imports due to the absolute shortage of resources. Among them, especially precious metals such as Au, Ag, Pd, etc. are considered to be a very important resource as a precious metal source because their resources are limited and expensive.

또한 국내 전자산업의 발달에 따라서 앞으로 급격히 증가될 것으로 전망되는 전자스크랩의 양은 국내 환경오염에도 적지 않은 영향을 미칠 것으로 예상되므로 이로부터 유가금속의 회수 뿐만 아니라 유해금속의 회수, 처리도 매우 중요한 문제로 대두되는 실정이다.In addition, the amount of electronic scrap, which is expected to increase rapidly in the future according to the development of the domestic electronics industry, is expected to have a significant effect on domestic environmental pollution. Therefore, not only the recovery of valuable metals, but also the recovery and treatment of harmful metals are very important issues. This situation is emerging.

따라서, 본 발명의 목적은 IC 칩 제조 공정에서 발생하는 불량반도체 스크랩 그리고 폐 컴퓨터에서 수집되는 스크랩으로부터 종전에 사용되어 오던 방법과는 달리 폐스크랩을 파쇄기에 넣어 파쇄한 후 귀금속만을 따로 분리한 후, 이 귀금속류에서 습식방법에 의하여 금을 분리해내는 전자 스크랩으로 부터의 새로은 귀금속 추출 방법을 제공하는데 있다.Accordingly, the object of the present invention is to separate the precious metals from the broken semiconductor scrap and scrap collected from the waste computer, and then scrap the waste scrap into the shredder and separate the precious metals separately. It is to provide a new method of extracting precious metals from electronic scrap that separates gold by wet method from these precious metals.

상기의 목적을 달성하기 위하여 본 발명에 의한 방법은, IC 칩 제조 정에서 발생하는 불량 반도체 스크랩 그리고 폐 컴퓨터에서 수집되는 스크랩으로부터 Au, Ag과 같은 귀금속 및 Cu, Ni, Sn 등의 유가금속을 회수하는 과정에서 폐스크랩을 파쇄기에 넣어 파쇄한 후 귀금속만을 분리하고, 질산을 사용하여 금이외의 금속 성분을 녹여 낸 후 남아 있는 금 부분을 물로 세척하는 공정으로 이루어진 것을 특징으로 한다.In order to achieve the above object, the method according to the present invention recovers precious metals such as Au and Ag and valuable metals such as Cu, Ni and Sn from scraps of defective semiconductors generated in IC chip manufacturing and scrap collected from waste computers. After crushing the waste scrap into the shredder in the process to separate only the precious metal, using a nitric acid to dissolve the metal components other than gold characterized in that consisting of the process of washing the remaining gold portion with water.

본 발명에서는 본 연구에서는 국내의 전자 회사에서 배출되는 IC 제조 공정에서 발생하는 반도체 스크랩 그리고 컴퓨터 폐기물로부터 발생되는 폐 스크랩으로부터 Au, Ag과 같은 귀금속 및 Cu, Ni, Sn 등의 유가금속을 회수하는 새로운 기술을 확립한 후 실제 공정에 응용하므로서 자원이 절대적으로 부족하여 몇몇 금속을 제외하고는 거의 모든 종류의 금속을 수입에 의존하고 있는 실정인 우리나라에 전자스크랩이 훌륭한 자원이 될 수 있도록 하고, 또한 국내 전자산업의 발달에 따라서 앞으로 급격히 증가될 것으로 전망되는 전자스크랩의 양은 국내 환경오염에도 적지 않은 영향을 미칠 것으로 예상되므로 이로부터 유가금속의 회수뿐만 아니라 유해금속의 회수, 처리를 동시에 실시하므로서 환경 오염방지에도 상당한 일조를 할 것으로 사료된다. 따라서 본 연구개발에서는 국내의 전자 회사에서 배출되는 IC 칩 제조 공정에서 발생하는 불량반도체 스크랩 그리고 폐 컴퓨터에서 수집되는 스크랩으로부터 종전에 사용되어 오던 방법과는 달리 폐스크랩을 파쇄기에 넣어 파쇄한 후 귀금속만을 따로 분리한 후, 이 귀금속류에서 습식방법에 의하여 금을 분리해내는 방법이다.In the present invention, the present invention is a new method for recovering precious metals such as Au and Ag and valuable metals such as Cu, Ni, and Sn from semiconductor scrap generated from IC manufacturing process discharged from domestic electronic companies and waste scrap generated from computer waste. After establishing the technology and applying it to the actual process, there is an absolute shortage of resources so that electronic scrap can be an excellent resource in Korea, where almost all kinds of metals except for some metals are dependent on imports. The amount of electronic scrap, which is expected to increase rapidly in the future according to the development of the electronic industry, is expected to have a significant effect on domestic environmental pollution. Therefore, it is possible to prevent environmental pollution by simultaneously recovering and treating not only valuable metals but also harmful metals. It is expected to contribute a great deal to Edo. Therefore, in this research and development, unlike conventional methods from scraps of defective semiconductors generated from IC chip manufacturing processes discharged from domestic electronic companies and scraps collected from waste computers, the waste scrap is put into the shredder and shredded. After separation, gold is separated from the precious metals by a wet method.

귀금속에서 금을 추출하는 방법으로는 크게 시안과 왕수를 사용하는 방법이 있는데 이들은 맹독성 물질이므로 반응 후에 환경 친화적인 처리를 하는데 상당히 많은 어려움이 따른다. 따라서 이와같은 어려움을 극복하기 위하여 파쇄 공정으로부터 분리된 귀금속을 주로 함유하고 있는 고품위 제품에서 금을 추출하는데, 시안이나 왕수를 사용하지 않고 질산을 사용하여 금 이외의 금속 성분을 녹여 낸 후 남아있는 금 부분을 물로 세척한 후 바로 금을 얻을 수 있을 것으로 사료된다. 왕수나 시안법의 경우 추출된 금 이온을 환원제로 사용하여 환원시킨 후 금을 얻기 때문에 후처리 과정이 필요하고, 또한 환원제도 부수적으로 사용하여야 하기 때문에 경제성이 떨어지는 상황에 비하여, 이러한 방법은 최소량의 질산을 금과 같이 섞여 있는 타 금속류들을 이온으로 녹여내므로서 순수한 금을 회수할 수 있고 반응 후 분리된 질산용액으로부터 다양한 습식 방법을 사용하여 나머지 금속을 제거한다.Gold is extracted from precious metals by using cyan and aqua remnants. These are highly toxic substances, and therefore, there are considerable difficulties in environmentally friendly treatment after the reaction. Therefore, in order to overcome such difficulties, gold is extracted from high-quality products mainly containing precious metals separated from the crushing process. The remaining gold after melting metal components other than gold using nitric acid without cyanide or aqua regia is used. It is believed that gold can be obtained immediately after washing the parts with water. In the case of the aqua regia or cyan method, the post-treatment process is necessary because the extracted gold ions are reduced by using the reducing agent to obtain the gold, and the reducing agent must be used as an accessory. Pure gold can be recovered by dissolving other metals mixed with nitric acid, such as gold, with ions. After the reaction, the remaining metal is removed from the separated nitric acid solution using various wet methods.

상술한 본 발명에 의하면 최소량의 질산을 금과 같이 섞여 있는 타 금속류들을 이온으로 녹여내므로서 순수한 금을 회수할 수 있고 반응 후 분리된 질산용액으로부터 다양한 습식 방법을 사용하여 나머지 금속을 제거한 후 질산은 염기로 중화하여 독성이 없는 용액으로 처리할 수 있는 효과가 있다.According to the present invention described above, pure gold can be recovered by dissolving other metals mixed with a minimum amount of nitric acid, such as gold, by ions. It can be neutralized and treated with non-toxic solutions.

Claims (1)

IC 칩 제조 정에서 발생하는 불량 반도체 스크랩 그리고 폐 컴퓨터에서 수집되는 스크랩으로부터 Au, Ag과 같은 귀금속 및 Cu, Ni, Sn 등의 유가금속을 회수하는 과정에서 폐스크랩을 파쇄기에 넣어 파쇄한 후 귀금속만을 분리하고, 질산을 사용하여 금이외의 금속 성분을 녹여 낸 후 남아 있는 금 부분을 물로 세척하는 공정으로 이루어 진 것을 특징으로 하는 전자 스크랩으로 부터의 새로은 귀금속 추출 방법.In the process of recovering precious metals such as Au and Ag and valuable metals such as Cu, Ni, and Sn from scraps of defective semiconductor scrap generated from the IC chip manufacturing process and scrap computers, waste metals are shredded into shredders and then shredded. A method of extracting a new precious metal from an electronic scrap, comprising separating and dissolving a metal component other than gold using nitric acid and then washing the remaining gold portion with water.
KR1020020035952A 2002-06-26 2002-06-26 Precious metals abstraction means from electronic scrap KR20020057939A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110274598A1 (en) * 2008-04-14 2011-11-10 Akridge James R Sustainable recovery of metal compounds
CN103397189A (en) * 2013-07-25 2013-11-20 广东邦普循环科技股份有限公司 Method for recovering silver or other metals from silver-containing wastes
KR101363817B1 (en) * 2011-11-29 2014-02-17 유관석 The device for exracting gold from either circuit board waste or gold manufacturing watste and the mehthod thereof

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KR20010067641A (en) * 2001-02-27 2001-07-13 황이춘 Separation and preconcentration method for precious metals from printed circuit boards using chelating resin

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Publication number Priority date Publication date Assignee Title
JPS5363214A (en) * 1976-11-19 1978-06-06 Seiko Instr & Electronics Ltd Recovering method for noble metals
US4426225A (en) * 1982-09-29 1984-01-17 Storage Technology Corporation Gold recovery method
JPS63203728A (en) * 1987-02-17 1988-08-23 Tanaka Kikinzoku Kogyo Kk Method for recovering platinum group metal from waste catalyst
JPH08260065A (en) * 1995-03-24 1996-10-08 Sumitomo Metal Mining Co Ltd Method for fractionating and recovering noble metal from noble metal-containing material
JPH09324222A (en) * 1996-06-03 1997-12-16 Clean Japan Center Method for recovering metal from plastic adhered with nonferrous metals
KR19980068762A (en) * 1997-02-24 1998-10-26 강필종 Valuable metal recovery method of waste PCBs (Printed Circuit Boards)
JPH1136020A (en) * 1997-07-15 1999-02-09 Justy:Kk Treatment of waste printed circuit board
KR20010067641A (en) * 2001-02-27 2001-07-13 황이춘 Separation and preconcentration method for precious metals from printed circuit boards using chelating resin

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110274598A1 (en) * 2008-04-14 2011-11-10 Akridge James R Sustainable recovery of metal compounds
KR101363817B1 (en) * 2011-11-29 2014-02-17 유관석 The device for exracting gold from either circuit board waste or gold manufacturing watste and the mehthod thereof
CN103397189A (en) * 2013-07-25 2013-11-20 广东邦普循环科技股份有限公司 Method for recovering silver or other metals from silver-containing wastes

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