• Resources Recycling
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• v.28 no.1
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• pp.3-14
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• 2019

Copper is used in many electronic components and construction parts due to its excellent electrical conductivity and heat transfer characteristics, and also used for pre-plating for double layer coating such as nickel, so that copper is an essential material in modern industry. Despite the expected increase of usage and importance on wiring, sensors and data equipment in the next generation industries, it is hard for securing stable copper supply and resource management resulting from the copper prices are fluctuating owing to the economic crisis in Europe, the low economic growth trend in China, and President Trump's commitment to public industrial facilities investment in U.S.. Since most of the domestic copper consumption is used by electrolytic copper cathode, we studied not only copper recycling technology which is being commercialized but also current research trend under the research stage. This study aims to examine the characteristics of each process and the areas where future recycling technology development is required.

• Proceedings of the Korea Multimedia Society Conference
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• 2000.04a
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• pp.332-335
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• 2000

산업의 급속한 발전으로 자원의 사용은 증가되고 있다. 연안역은 그 지리적 특성상 다양한 산업이 자리잡고 있어 배출되는 폐자원의 종류도 다양하다. 본 논문은 연안 폐자원 활용을 위한 데이터베이스설계를 제안한다. 본 설계는 웹 환경에서 구현되고 웹과 브라우저의 연동은 플랫폼에 독립적인 Servlet을 사용한다. 또한, 인터넷 환경에서의 효율적인 데이터 교환을 위한 XML 표현 스킴을 설계한다. 페자원 및 폐자원활용 데이터는 폐자원을 배출하는 회사 및 재활용하는 회사, 또는 이에 관심을 가진 개인이나 단체에 의해 수집된다.

• Hwankyungkyoyuk
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• v.11 no.1
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• pp.21-30
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• 1998

• Hwankyungkyoyuk
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• v.11 no.1
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• pp.39-52
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• 1998

• Hwankyungkyoyuk
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• v.11 no.1
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• pp.53-64
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• 1998

• Hwankyungkyoyuk
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• v.11 no.1
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• pp.65-76
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• 1998

• Hwankyungkyoyuk
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• v.11 no.1
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• pp.77-90
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• 1998

• Resources Recycling
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• v.28 no.4
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• pp.51-58
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• 2019

Dismantlement of lithium primary batteries without explosion is required to recycle the lithium primary batteries which could be exploded by heating too much or crushing. In the present study, the optimum discharging condition was investigated to dismantle the batteries without explosion. When the batteries were discharged with $0.5kmol{\cdot}m^{-3}$ sulfuric acid, the reactivity of the batteries decreased after 4 days at $35^{\circ}C$ and after 1 day at $50^{\circ}C$, respectively. This result shows that higher temperature removed the high reactivity of the batteries. Because loss of metals recycled increases when the batteries are discharged only with the sulfuric acid, discharging process using acid solution and water was newly proposed. When the batteries were discharged with water during 24 hours after discharging with $0.5kmol{\cdot}m^{-3}$ sulfuric acid during 6 hours, the batteries discharged were dismantled without explosion. Because decrease in loss of metals was accomplished by new process, the recycling process of the batteries could become economic by the 2-step discharging process.

• Feed Journal
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• v.3 no.12 s.28
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• pp.114-119
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• 2005

건국대학교 정승헌 교수, 「폐자원재활용 방안과 이용기술」심포지엄서 제안

• Resources Recycling
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• v.12 no.6
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• pp.71-85
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• 2003