KR19990070807A - Extraction method of precious metal elements in closed printed circuit board using converter and electric furnace slag - Google Patents
Extraction method of precious metal elements in closed printed circuit board using converter and electric furnace slag Download PDFInfo
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- KR19990070807A KR19990070807A KR1019980005854A KR19980005854A KR19990070807A KR 19990070807 A KR19990070807 A KR 19990070807A KR 1019980005854 A KR1019980005854 A KR 1019980005854A KR 19980005854 A KR19980005854 A KR 19980005854A KR 19990070807 A KR19990070807 A KR 19990070807A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B7/00—Working 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
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B11/00—Obtaining noble metals
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
폐기되는 전자제품의 폐 인쇄회로기판(PCB)에는 상당량의 귀금속원소가 포함되어 있음에도 불구하고 현재 국내에서는 이를 효과적으로 추출할 기술이 마땅치 않아 거의 전량 폐기되거나, 외국에 수출되는 것에 불과한 것이었다.Although waste printed circuit boards (PCBs) of discarded electronic products contain a considerable amount of precious metal elements, they are currently deemed to be effectively extracted in Korea, but almost entirely discarded or exported to foreign countries.
따라서 본 발명은 철강제련시에 발생하는 전로 및 전기로슬래그의 조성이 귀금속 건식용해법을 이용하여 폐PCB를 용융시켜 귀금속원소를 얻고자 할 때 첨가하는 용재성분으로 매우 바람직하다는 것에 착안하여 종래 고가의 용재성분인 생석회나 이산화규소를 대체하여 사용하기 위한 것이다.Therefore, in view of the present invention, it is noted that the composition of converter and electric furnace slag generated during steel smelting is very desirable as a constituent to be added when melting waste PCB by using a noble metal dry melting method to obtain a noble metal element. It is intended to replace the component quicklime or silicon dioxide.
Description
본 발명은 철강제련시에 발생하는 전로및 전기로슬래그를 이용하여 폐기되는 전자제품의 인쇄회로기판(이하 폐PCB라 한다)로 부터 금, 은, 백금속원소 등과 같은 귀금속원소를 추출하는 방법에 관한 것이다. The present invention relates to a method for extracting precious metal elements such as gold, silver, and white metal elements from printed circuit boards (hereinafter referred to as waste PCBs) of electronic products that are discarded by using converter and electric furnace slag generated during steel refining. will be.
최근 가전제품, 컴퓨터, 핸드폰등과 같은 전자제품에는 그 기능을 향상시키기 위하여 금, 은, 백금족원소들과 같은 귀금속원소의 함량을 대폭 증가시키고 있는 실정임에도 불구하고, 국내에는 상기와 같은 전자제품들이 폐기될 경우 발생하는 폐PCB의 이용방안에 대한 연구는 그다지 진전되어있지 못한 상황이다. 특히 폐PCB에 함유된 귀금속원소를 추출, 정련하는 기술은 아직 미비하므로 폐PCB를 그대로 폐기처분하거나, 조정련상태에서 외국에 수출할 수밖에 없어 국가적으로 많은 경제적 손실을 보고 있는 실정이다.In recent years, electronic products such as home appliances, computers, mobile phones, and the like have significantly increased the content of precious metal elements such as gold, silver, and platinum group elements to improve their functions. Research on the use of the waste PCB when it is discarded is not progressed much. In particular, the technology of extracting and refining precious metal elements contained in the waste PCB is still incomplete. Therefore, the waste PCB has to be disposed of as it is, or exported to foreign countries in the state of refining.
현재 폐PCB로부터 귀금속원소를 추출하기위해 여러 가지 방법이 사용되고 있으나, 산이나 알카리용액으로 귀금속원소를 직접 침출시키는 습식법은 수질오염 등의 우려가 있어 세계적으로 점차 사양화되고 있으며, 대신 포집재가 기저에 형성된 플라즈마로나 아크로에 폐PCB를 용융시켜 슬래그를 조성하고 귀금속원소들을 조금속상태로 포집재에 의해 포집한 후, 이를 소규모의 습식법으로 정련하는 귀금속 건식용해법을 대부분의 국가에서 채택하고 있다.Currently, various methods are used to extract precious metal elements from waste PCB, but the wet method of directly leaching precious metal elements with acid or alkaline solution is increasingly being specified worldwide because of water pollution. Most countries have adopted the noble metal dry melting method in which waste PCB is melted in a plasma furnace or an arc furnace to form slag, and precious metal elements are collected by a trapping material in a crude metal state and then refined by a small wet method.
상기 귀금속 건식용해법은 용융된 폐PCB에서 추출될 귀금속원소의 손실을 줄이는 것이 무엇보다 중요하며, 이를 위해서는 적절한 슬래그조성을 유지하는 것이 매우 중요하다. 또한 상기 슬래그 조성과 염기도 조정은 폐PCB 내의 귀금속원소의 회수측면과 내화물유지, 유동도, 소재화측면에서 대단히 중요한 요소로써, 현재는 폐PCB를 용융시켜 슬래그를 만들기 위해 탄산나트륨(Na2CO3), 산화칼슘(CaO), 탄산칼슘(CaCO3), 이산화규소(SiO2)과 같은 천연적 용재의 염기성 성분을 사용하여 슬래그의 유동성 및 귀금속의 슬래그 내의 용해도를 저감시키는 방법을 사용하고 있으나, 폐PCB는 로에서 직접 용융시 슬래그 점성도가 크고, 전기 전도도는 적어 전기로에서 이를 적절하게 처리하기가 지극히 어려운 폐단을 갖는다. 또한 슬래그 조성을 조절하기 위한 슬래그 조정제로 상기 원료들을 사용하기에는 이들 원료들이 너무나 고가이고 귀금속원소의 추출율이 낮아 비경제적이며, 귀금속원소의 추출에 많은 시간을 필요로 하는 폐단을 갖는 것이다.In the precious metal dry melting method, it is important to reduce the loss of precious metal elements to be extracted from the molten waste PCB, and for this purpose, it is very important to maintain proper slag composition. In addition, the slag composition and basicity adjustment are very important factors in terms of recovery, refractory maintenance, fluidity, and materialization of precious metal elements in the waste PCB. Currently, sodium carbonate (Na 2 CO 3 ) Using basic components of natural solvents such as calcium oxide (CaO), calcium carbonate (CaCO 3 ) and silicon dioxide (SiO 2 ) to reduce slag fluidity and solubility in slag of precious metals. The PCB has a high slag viscosity when directly melted in the furnace and a low electrical conductivity, making it extremely difficult to properly process it in an electric furnace. In addition, these raw materials are too expensive to use the raw materials as a slag adjusting agent for controlling the slag composition, and the extraction rate of the precious metal elements is uneconomical, and has a closed end that requires a lot of time to extract the precious metal elements.
본 발명은 철강제련시 제강공정에서 발생하는 전로 및 전기로슬래그에 산화철(FeO), 산화칼슘(CaO) 등의 유용성분이 들어있어 귀금속원소의 슬래그내 용해도가 최적임을 감안하여 귀금속건식용해법중 상기 폐PCB의 용융시 귀금속원소를 추출하기 위한 용재로 사용하므로써 폐PCB로부터 귀금속원소를 추출하고자 하는 것이다.The present invention contains the useful components such as iron oxide (FeO), calcium oxide (CaO) in the converter and electric furnace slag generated during steelmaking during steel smelting in consideration of the optimum solubility in the slag of the precious metal element in the waste metal dry process It is to extract the precious metal element from the waste PCB by using it as a solvent to extract the precious metal element during melting.
제강슬래그는 일반적으로 전로, 평로, 전기로 등에 의하여 생산되는데 그 성분이 다른 제강슬래그가 배출된다. 이들 중 제강슬래그중 전로슬래그는 철강의 생산과정에 생산되는 부산물로서 일반적으로 염기도가 높고 비중이 큰 철, 망간등의 유가금속을 함유하고 있기 때문에 여러 슬래그들 중에서 그 자체의 경도가 상당히 높은편이다.Steelmaking slag is generally produced by converters, furnaces, electric furnaces, etc., and steelmaking slag having different components is discharged. Among them, converter slag among steelmaking slag is a by-product produced in the production process of steel, and since it contains valuable metals such as iron and manganese, which are generally basic and have a high specific gravity, their hardness is quite high among various slags. .
또한 전기로 슬래그는 산화슬래그와 환원슬래그가 있는데 전기로 모두 팽창율이 10%이하로 팽창붕괴성은 아주 낮은 천연 쇄석과 비슷하다.Furnace slag is composed of oxidized slag and reducing slag, both of which are similar to natural crushed stone, which has very low expansion decay rate.
표 1과 같이 슬래그속에 포함된 각종 산화물은 자연 암석이나 광물에서 볼 수 있는 성분들이고 전로슬래그는 철(Fe)성분을 상당량 포함하고 있는 특징을 가진다.As shown in Table 1, the various oxides contained in the slag are the components found in natural rocks and minerals, and the converter slag has a significant amount of iron (Fe).
표 1. 전로 및 전기로슬래그의 조성Table 1. Composition of converter and furnace slag
(단위 :%)(unit :%)
전로슬래그의 화학적 조성은 중량 퍼센트로 산화칼슘(CaO)44.8∼52.3%, 이산화규소(SiO2)13.2∼18.6%, 산화알루미늄(Al2O3)0.9∼2.8%, 유황(S)0.02∼0.1%, 전철분(T.Fe)14.8∼19.2%, 산화마그네슘(MgO)2.8∼9.6%, 산화망간(MnO)3.2∼6.0%, 산화티타늄(TiO2)1.0∼2.4% 이다. 전기로슬래그의 화학적 조성은 중량 퍼센트로 이산화규소(SiO2)12.8∼23.2%, 산화칼슘(CaO)14.5∼42.7%, 산화알루미늄(Al2O3)3.9∼11.9%, 전철분(T.Fe)11.2∼44.1%, 산화마그네슘(MgO)4.0∼13.6%, 산화망간(MnO)0.1∼1.6%, 산화티타늄(TiO2)0.04∼0.6% 이다.The chemical composition of converter slag is 44.8 to 52.3% of calcium oxide (CaO), 13.2 to 18.6% of silicon dioxide (SiO 2 ), 0.9 to 2.8% of aluminum oxide (Al 2 O 3 ), and sulfur (S) of 0.02 to 0.1 %, Iron powder (T.Fe) 14.8 to 19.2%, magnesium oxide (MgO) 2.8 to 9.6%, manganese oxide (MnO) 3.2 to 6.0%, titanium oxide (TiO 2 ) 1.0 to 2.4%. The chemical composition of the electric furnace slag is 12.8 to 23.2% of silicon dioxide (SiO 2 ), 14.5 to 42.7% of calcium oxide (CaO), 3.9 to 11.9% of aluminum oxide (Al 2 O 3 ), and iron powder (T.Fe). 11.2 to 44.1%, magnesium oxide (MgO) 4.0 to 13.6%, manganese oxide (MnO) 0.1 to 1.6%, and titanium oxide (TiO 2 ) 0.04 to 0.6%.
특히, 귀금속원소의 고온용융에서는 귀금속원소의 손실을 줄이기위해 적절한 슬래그조성을 유지하는 것이 대단히 중요하므로 이들 용해시 이산화규소(SiO2)나 산화칼슘(CaO)과 같은 고가의 용재성분을 첨가하여 슬래그의 유동성 및 귀금속의 슬래그내의 용해도를 저감시키는 방법을 쓰고있다. 특히 철 등을 포집 금속으로 사용하는 귀금속 건식용해법에서는 이를 슬래그 성분으로 부터의 철공급과 용융시 전도성 확보를 목적으로 철분말을 투입하거나 철성분의 함유 슬래그가 필요하다.In particular, it is very important to maintain proper slag composition in order to reduce the loss of precious metal elements at high temperature melting of precious metal elements. Therefore, expensive melt components such as silicon dioxide (SiO 2 ) or calcium oxide (CaO) are added to the slag to reduce the loss of precious metal elements. A method of reducing fluidity and solubility in slag of precious metals is used. In particular, in the dry metal melting method of noble metals using iron as a collecting metal, iron powder or slag containing iron is required to supply iron from slag and secure conductivity during melting.
이처럼 폐PCB의 직접 용해시나 하소후의 용해시 사용하는 용재 성분으로 종래의 고가인 용재를 사용하는 것보다 제강공정에서 발생하는 전로와 전기로의 폐 슬래그를 대체재료로 사용하는 것이 에너지 측면, 유가금속 회수율 향상, 용해시간 단축, 자원 재활용 측면에서 바람직하였다.As such, the use of waste slag from converter and electric furnace in the steelmaking process as an alternative material for the direct melting of waste PCB or melting after calcination is more energy-efficient and valuable metal recovery rate. It was desirable in terms of improvement, shortening of dissolution time, and resource recycling.
도 1 - 본 발명의 공정도.1-process diagram of the present invention.
이하 본 발명의 제조방법을 상세히 설명하면 다음과 같다.Hereinafter, the manufacturing method of the present invention will be described in detail.
먼저 폐PCB는 슈레더로 분쇄하는 공정과 상기 공정을 거쳐 분쇄된 폐PCB를 그대로 용융로에 투입하거나 또는 분쇄된 폐PCB를 하소작업을 통해 수지(樹脂) 등을 분해시키고, 납(Pb) 등의 휘발성 금속성분은 제거하여 용융로에 투입하고, 또한 전로 및 전기로슬래그 역시 직경 대략 0,1 ∼ 10mm이하로 수쇄 또는 크라셔에 의해 분쇄한 뒤, 수분을 건조시켜 역시 용융로에 투입하는 공정을 거친다. 상기 전로 및 전기로슬래그의 직경을 0,1에서 10mm로 한정하는 이유는 전로 및 전기로슬래그가 0,1mm이하일 경우에는 비산의 우려가 있고, 10mm이상일 경우에는 용융작업이 곤란하기 때문이다.First, waste PCB is crushed with a shredder and waste PCB that is crushed through the above process is put into the melting furnace or calcined waste PCB is calcined to decompose resins, and lead (Pb) The metal components are removed and introduced into the melting furnace, and the converter and the electric furnace slag are also pulverized by crushing or crushing to a diameter of about 0,1 to 10 mm or less, and then dried to add moisture to the melting furnace. The reason for limiting the diameter of the converter and the furnace slag from 0,1 to 10mm is that there is a fear of scattering when the converter and the furnace slag is 0,1mm or less, and when it is 10 mm or more, the melting operation is difficult.
이와같이 용융로에 투입된 폐PCB와 전로 및 전기로슬래그를 용융시킴에 있어서 염기도를 0,7 ∼ 1,3에 맞춰 용융시키는 공정과 상기 용융공정을 거쳐 폐PCB에 함유되어있던 귀금속원소를 포집한 조금속(粗金屬)을 회수하는 공정과, 상기 조금속을 습식분리공정을 거쳐 귀금속원소를 추출하는 공정으로 이루어진다.Thus, in melting the waste PCB, the converter and the electric furnace slag put into the melting furnace, the basic metal is melted according to 0,7-1,3 and the crude metal which collects the precious metal element contained in the waste PCB through the melting process. (Iii) recovering the crude metal and extracting the precious metal element through a wet separation process.
상기 용융로의 온도는 1100∼1300℃정도가 바람직하고, 상기 용융로 내의 염기도를 0,7 ∼ 1,3로 조절하는 이유는 상기 염기도에서 슬래그의 유동성이 가장 좋고, 귀금속원소의 추출을 용이하게 하기 때문이다. 또한 폐PCB의 용융작업에 있어서 열보존 및 조업의 편의성을 위해서 용융로에 투입되는 전로 및 전기로슬래그의 중량은 원료전체중량의 1/5∼1/3정도로 하는 것이 바람직하다. 이는 전로 및 전기로슬래그의 투입량이 1/5이하일 경우에는 용해작업이 곤란하고, 1/3이상인 경우에는 슬래그의 귀금속함량이 증가하기 때문이다.The temperature of the melting furnace is preferably about 1100 ~ 1300 ℃, the reason for adjusting the basicity in the melting furnace to 0,7 to 1,3 because the slag fluidity is the best in the basicity, and it is easy to extract precious metal elements to be. In addition, in the melting of waste PCB, for the sake of heat preservation and convenience of operation, the weight of converter and electric furnace slag introduced into the melting furnace is preferably about 1/5 to 1/3 of the total weight of the raw material. This is because when the input of the converter and the electric furnace slag is less than 1/5, it is difficult to dissolve the work, and when more than 1/3, the slag precious metal content increases.
본 발명에서 상기한 것처럼 폐기되던 전로 및 전기로슬래그를 이용하여 폐PCB로 부터 귀금속원소를 추출하므로써 폐기물을 자원화할 수 있을 뿐만 아니라 공해방지의 효과와 저렴한 가격으로 귀금속원소를 회수할 수 있는 방법을 제공하기 위한 것으로, 바람직한 실시예들을 상기한 제조공정에 따라 시행하였다.By using the converter and the electric furnace slag discarded as described above in the present invention, by extracting precious metal elements from the waste PCB, it is possible not only to recycle the waste, but also to provide a method of recovering the precious metal elements at the low cost and preventing pollution. To this end, preferred embodiments were carried out according to the above-described manufacturing process.
제 1실시예First embodiment
폐PCB으로 부터 귀금속원소를 추출하는 실험을 직류아크 로와 플라즈마 로에서 시행하였다. 이때 용재로는 화학적 조성은 중량 퍼센트로 산화칼슘(CaO)44.8∼52.3%, 이산화규소(SiO2)13.2∼18.6%, 산화알루미늄(Al2O3)0.9∼2.8%, 유황(S)0.02∼0.1%, 전철분(T.Fe)14.8∼19.2%, 산화마그네슘(MgO)2.8∼9.6%, 산화망간(MnO)3.2∼6.0%, 산화티타늄(TiO2)1.0∼2.4%인 전로슬래그와 화학적 조성이 중량 퍼센트로 이산화규소(SiO2)12.8∼23.2%, 산화칼슘(CaO)14.5∼42.7%, 산화알루미늄(Al2O3)3.9∼11.9%, 전철분(T.Fe)11.2∼44.1%, 산화마그네슘(MgO)4.0∼13.6%, 산화망간(MnO)0.1∼1.6%, 산화티타늄(TiO2)0.04∼0.6%인 전기로슬래그를 이용하였고, 슬래그의 염기도는 0.8로 맞추어 기저양극 접속을 하여 실시하였으며, 이때 슬래그를 용해하기 전에 로의 가열과 양전극간의 전기적 접촉이 양호하도록 코크스입자를 사용하였으며 이때의 온도는 1200℃이다. 상부와 노저전극의 사이에 스크랩을 장입후 아크발생후 폐PCB를 장입하여 약 180분간의 용융후 완전히 용융이 이루어진 후 출탕하였고, 조금속으로부터 습식분리공정을 통해 귀금속원소를 추출하였다.Experiments for the extraction of precious metals from the waste PCB were carried out in direct current and plasma furnaces. In this case, the chemical composition is 44.8 to 52.3% of calcium oxide (CaO), 13.2 to 18.6% of silicon dioxide (SiO 2 ), 0.9 to 2.8% of aluminum oxide (Al 2 O 3 ), and sulfur (S) of 0.02 to 0.1%, iron powder (T.Fe) 14.8 to 19.2%, magnesium oxide (MgO) 2.8 to 9.6%, manganese oxide (MnO) 3.2 to 6.0%, titanium oxide (TiO 2 ) 1.0 to 2.4% Composition by weight percent silicon dioxide (SiO 2 ) 12.8 to 23.2%, calcium oxide (CaO) 14.5 to 42.7%, aluminum oxide (Al 2 O 3 ) 3.9 to 11.9%, iron content (T.Fe) 11.2 to 44.1% Electric furnace slag with magnesium oxide (MgO) 4.0-13.6%, manganese oxide (MnO) 0.1-1.6%, titanium oxide (TiO 2 ) 0.04-0.6% was used. At this time, before melting the slag, coke particles were used so that electrical contact between the heating of the furnace and the positive electrode was good, and the temperature was 1200 ° C. After charging the scrap between the top and the bottom electrode, after the arc generation, the waste PCB was charged and melted for about 180 minutes and then completely melted. The precious metal element was extracted from the crude metal through a wet separation process.
제 2실시예Second embodiment
실시예1과 동일한 성분의 전로 및 전기로슬래그를 용재로 가스-산소버너 도가니로에서 동일한 방법으로 조금속을 제조하였고, 역시 습식분리공정을 통해 귀금속원소를 추출하였다.Crude metals were prepared in the same manner in the gas-oxygen burner crucible furnace using the converter and the electric furnace slag of the same component as in Example 1, and the precious metal elements were also extracted through a wet separation process.
비교예Comparative example
종래의 용재, 즉 산화칼슘(CaO)를 이용하여 폐PCB를 용융하는 용융시험을 단전극 아크로에서 시행하였는데 슬래그의 염기도는 영향 요소를 줄이기 위해 다른 첨가물없이 산화칼슘(CaO)를 이용하여 전기아크로 내에서 제 1실시예와 동일한 방법으로 시행하였다.The melting test for melting waste PCB using conventional materials, namely calcium oxide (CaO), was carried out in a single-electrode arc furnace, and the basicity of slag was changed into electric arc furnace using calcium oxide (CaO) without other additives to reduce the influence factor. In the same manner as in the first embodiment.
실시예1, 실시예2, 비교예에서 제조된 슬래그의 용출 특성을 평가하기위해 환경오염 공정시험법인 TCLP법에 따라 시료를 건조후 분쇄한 후 용출액과 혼합(1:20)하여 온도 22±3℃, 진폭4∼5cm분당 30±2회, 18±2시간 진탕기에서 진탕하여 여과한 후 항목별로 분석을 시행하였으며 귀금속원소의 잔여 함량을 조사하였다.In order to evaluate the elution characteristics of the slag prepared in Examples 1, 2, and Comparative Example, the sample was dried and pulverized according to TCLP method, which is an environmental pollution test method, mixed with the eluent (1:20), and the temperature was 22 ± 3. After filtering by shaking at 30 ± 2 times, amplitude of 4 ~ 5cm, and shaking at 18 ± 2 hours for 4 ~ 5cm, each item was analyzed and the residual content of precious metals was investigated.
표에서는 제조된 슬래그의 침출특성을 나타낸다.The table shows leaching characteristics of the produced slag.
표 2. 슬래그의 침출특성 (단위:ppm)Table 2. Leaching Characteristics of Slag (Unit: ppm)
또한 표3에 나타난 바와같이 귀금속원소의 추출율을 비교하여 보더라도 종래의 용재와 비교하여 전로 및 전기로슬래그를 사용할 때 오히려 귀금속원소의 추출율이 높았으며, 실시예 1, 2의 경우가 비교예보다 용융시 침출농도도 매우 낮았고, 용융중의 슬래그는 유동성이 좋았으며, 출탕이 원활하였다. 실제 조업측면에서 고려하더라도 실시예 1과 2의 경우가 대단히 용융하기가 용이하였으며, 아크발생이 대단히 양호하였다.In addition, as shown in Table 3, even when comparing the extraction rate of the precious metal element, the extraction rate of the precious metal element was higher when using the converter and the electric furnace slag compared to the conventional solvent, and in the case of Examples 1 and 2 when melting than the comparative example The leaching concentration was also very low, the slag in the melt had good fluidity and smooth tapping. Even in consideration of the actual operation, the examples 1 and 2 were very easy to melt, and the arc generation was very good.
표 3. 귀금속원소의 추출율 (단위 : %)Table 3. Extraction rate of precious metal elements (unit:%)
이상 살펴 본 바와 같이 본 발명은 철강제련시 제강공정에서 발생되는 전로 및 전기로슬래그를 폐 전자스크랩의 인쇄회로기판으로 부터 귀금속원소 추출시 종래 고가의 용재 대체재로 사용하므로써 폐PCB 내의 귀금속원소를 저렴한 비용으로 생산할 수 있으며, 종래 폐 가전제품 등의 폐PCB의 폐기로인한 공해방지에 일조할 수 있으며, 종래의 용재와 비교하더라도 귀금속원소의 추출율이 오히려 나은 효과를 갖는 발명인 것이다.As described above, the present invention uses the converter and the electric furnace slag generated in the steelmaking process during steel smelting as a substitute for the conventional expensive materials when extracting the precious metal element from the printed circuit board of the waste electronic scrap. It can be produced, and can help to prevent pollution due to the disposal of waste PCB, such as conventional waste electrical appliances, it is an invention that the extraction rate of the precious metal element has a rather good effect even when compared to the conventional solvent.
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| KR1019980005854A KR100250061B1 (en) | 1998-02-18 | 1998-02-18 | Method for extracting the noble metal noble metal of the waste pcb using a converter and electric furnace slag |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100528506B1 (en) * | 2002-11-06 | 2005-11-15 | 한국지질자원연구원 | A Method for Concentrating and Recovering Precious Metals from Spent PCBs and Spent Auto-Catalysts Simultaneously |
| US7867317B2 (en) | 2007-11-16 | 2011-01-11 | Korea Institute of Geoscience and Minderal Resources | Pre-treatment process for liberation of metals from waste printed circuit boards using organic solution |
| KR101311797B1 (en) * | 2006-09-07 | 2013-09-25 | 인하대학교 산학협력단 | Method for recovering valuable metals from printed circuit board |
| KR20190037529A (en) | 2017-09-29 | 2019-04-08 | (주)하람코퍼레이션 | Separating device for part of substrate |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104383658B (en) * | 2014-10-13 | 2018-03-06 | 林素玉 | It is used in the modification agent of cupric discarded object |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS62280331A (en) * | 1986-05-28 | 1987-12-05 | Tanaka Kikinzoku Kogyo Kk | Method for recovering au |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100528506B1 (en) * | 2002-11-06 | 2005-11-15 | 한국지질자원연구원 | A Method for Concentrating and Recovering Precious Metals from Spent PCBs and Spent Auto-Catalysts Simultaneously |
| KR101311797B1 (en) * | 2006-09-07 | 2013-09-25 | 인하대학교 산학협력단 | Method for recovering valuable metals from printed circuit board |
| US7867317B2 (en) | 2007-11-16 | 2011-01-11 | Korea Institute of Geoscience and Minderal Resources | Pre-treatment process for liberation of metals from waste printed circuit boards using organic solution |
| KR20190037529A (en) | 2017-09-29 | 2019-04-08 | (주)하람코퍼레이션 | Separating device for part of substrate |
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