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자원환경지질 = Economic and environmental geology, v.47 no.6, 2014년, pp.645 - 655
김봉주 (조선대학교 에너지자원공학과) , 조강희 (조선대학교 에너지자원공학과) , 조지유 (조선대학교 에너지자원공학과) , 최낙철 (서울대학교 지역시스템공학과) , 박천영 (조선대학교 에너지자원공학과)
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In order to obtain pure metallic Te from gold concentrate, roasting treatment, hypochlorite leaching, Fe removal and electrolysis experiments were carried out. The contents of Au, Ag and Te from the concentrate sample and roasted sample were much more soluble in the hypochlorite solution than in aqu...
| 핵심어 | 질문 | 논문에서 추출한 답변 |
|---|---|---|
| 용액 속에 이온 상태로 존재하는 귀금속과 유용금속을 금속형태로 회수하는 방법 중, 가장 효과적인 방법은 무엇인가? | 용액 속에 이온 상태로 존재하는 귀금속과 유용금속을 금속형태로 회수하는 방법으로 전기분해가 가장 효과적이다. 양이온으로 존재하는 귀금속 및 유용금속 이온들이 음극판(cathode plate) 혹은 양극 슬라임으로 회수된다. | |
| Au와 Ag를 회수하기 위해서 주로 무엇을 활용하는가? | 이들 귀금속과 유용금속들을 회수하기 위해서는 환원 상태로 존재하는 금 정광을 용해시켜야 한다. Au와 Ag를 회수하기 위해서 주로 비-시안 용매인 차아염소산을 활용한다 (Hasab et al., 2013; Lee et al. | |
| 전기분해를 수행하기 전에 용매추출(solvent extraction)을 이용하여 전기분해 효율을 감소시키는 불순물들을 먼저 제거해야 하는 이유는 무엇인가? | 즉, 음극표면에서 Fe3+가 Fe2+로 먼저 환원되기 때문에 구리가 회수되지 않는다. 그러므로 Au 전해질 용액에 Ag, Cu, Ni, Co 및 Fe 이온과 같은 유용금속들이 용해되어 있으면 물질이동율의 감소, 전기분해 효율감소, 전력소비 증가, 그리고 음극회수물질의 품위 저하가 일어난다(Das and Krishna, 1996; Steyn and Sandenbergh, 2004). 따라서 전기분해를 수행하기 전에 용매추출(solvent extraction)을 이용하여 전기분해 효율을 감소시키는 불순물들을 먼저 제거해야한다(Yokoyama et al. |
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