MOCVD 더스트로부터 Ga과 In의 침출 거동
Leaching behavior of Ga and In from MOCVD dust
2
조회
0
다운로드
4
인용
0
참고문헌
키워드
초록
Leaching of MOCVD dust in the LED industry is an essential stage for hydro-metallurgical recovery ofpure Ga and In. To recover Ga and In, the leaching behavior of MOCVD scrap of an LED, which contains significantamounts of Ga, In, Al and Fe in various phases, has been investigated. The leaching process must be performed effectivelyto maximize recovery of Ga and In metals using the most efficient lixiviant. Crystalline structure and metalliccomposition of the raw MOCVD dust were analyzed prior to digestion. Subsequently, various mineral acids were testedto comprehensively study and optimize the leaching parameters such as acidity, pulp density, temperature and time. Themost effective leaching of Ga and In was observed for a boiling 4 M HCl solution vigorously stirred at 400 rpm. Phasetransformation of GaN into gallium oxide by heat treatment also improved the leaching efficiency of Ga. Subsequentlyhigh purity Ga and In can be recovered by series of hydro processes.
Abstract
Leaching of MOCVD dust in the LED industry is an essential stage for hydro-metallurgical recovery ofpure Ga and In. To recover Ga and In, the leaching behavior of MOCVD scrap of an LED, which contains significantamounts of Ga, In, Al and Fe in various phases, has been investigated. The leaching process must be performed effectivelyto maximize recovery of Ga and In metals using the most efficient lixiviant. Crystalline structure and metalliccomposition of the raw MOCVD dust were analyzed prior to digestion. Subsequently, various mineral acids were testedto comprehensively study and optimize the leaching parameters such as acidity, pulp density, temperature and time. Themost effective leaching of Ga and In was observed for a boiling 4 M HCl solution vigorously stirred at 400 rpm. Phasetransformation of GaN into gallium oxide by heat treatment also improved the leaching efficiency of Ga. Subsequentlyhigh purity Ga and In can be recovered by series of hydro processes.
참고문헌 (9)
- LED Material Report - LED MOCVD용Precursor 시장 및 산업 분석, "D. Kim", IHS Electronics & Media, ~ (2013)
- C. Gibson, "Sector research – Indium and gallium overview" (2011), Edison investment research
- T. E. Graedel, "What do we know about metal recycling rates", J. Ind. Ecol., 15, pp.355~ (2011)
- Recycling rates of metals, "T. E. Graedel", UNEP, ~ (2011)
- K. Salazar, "Mineral Commodity Summaries", Geological survey, 58~ (2013)
- H. S. Hong, , Res. Chem. Intermed., 36, pp.761~ (2010)
- 김경일, "디스플레이 투명전극용 인듐-주석-산화물의 전기화학적 재활용 공정에 관한 전과정 평가", 청정기술, 19(4), pp.388~392 (2013), 한국청정기술학회
- H. D. Xiao, , Mater. Chem. Phys., 94, pp.261~ (2005)
- J. S. Lee, , J. Cryst. Growth, 244, pp.287~ (2002)