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NTIS 바로가기資源리싸이클링 = Journal of the Korean Institute of Resources Recycling, v.26 no.5, 2017년, pp.12 - 21
홍현선 (성신여자대학교) , 김예린 (성신여자대학교) , 조현정 (성신여자대학교) , 김대원 (고등기술연구원) , 김대웅 ((주) KC) , 김형준 (세라믹기술원) , 김용 (피스코) , 김성표 (고려대학교)
Red mud generated in the alumina manufacturing process contains various valuable resources, but it is not comprehensively recycled yet causing severe environmental problems. In Korea, red mud is producing about 200,000 tons annually and most of them are landfilled or disposed. Red mud's recycling te...
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핵심어 | 질문 | 논문에서 추출한 답변 |
---|---|---|
레드머드는 무엇인가? | 레드머드(Red mud)는 보크사이트(Bauxite)를 원료로 알루미나를 제조하는 공정에서 발생하는 적색의 공정산출물이다. 현재 산업의 발달로 인해 알루미나 수요량이 증가함에 따라 레드머드의 발생량도 비례하여 증가하고 있는 상황이다. | |
레드머드에서 스칸듐을 회수하는 기술 중 가장 많이 사용되는 방법은 무엇인가? | 이에 따라 레드머드에서 스칸듐을 회수하는 기술이 전 세계적으로 연구되고 있는 실정이다. 여러 가지 추출, 회수 기술이 있으며 가장 많이 사용되는 방법들은 산 침출을 통한 용매추출 방법 및 이온 교환 수지를 이용한 회수 방법 등이다. 지금까지 레드머드에서 스칸듐을 용매추출 하여 회수하는 연구는 전 세계적으로 광범위하게 연구되고 있다27,31-39). | |
레드머드에는 어떤 물질이 포함되어 있는가? | 레드머드에는 Hematite (35 ~ 40% Fe2O3), Hydrate Alumina (15 ~ 20% Al2O3·xH2), Sodalite (5 ~ 10% Na2O2·SiO2·Al2O3), Calcium minerals (5 ~ 10% CaO,CaCo3), Quartz (5 ~ 10% SiO2), Zeolite (5 ~ 10% Cancrinite) 등의 주요 성분과 기타 소량의 희소금속 광물질이 포함되어 있다11-14). 이처럼 유가성의 희소금속 성분이 포함되어 있음에도 효율적인 금속 회수 방법을 찾지 못해 기존에는 대부분 육상 매립 및 해양 투기로 처리되어 왔다. |
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