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韓國鑛物學會誌 = Journal of the Mineralogical Society of Korea, v.29 no.2, 2016년, pp.47 - 58
조강희 (조선대학교 에너지.자원공학과) , 김봉주 (조선대학교 에너지.자원공학과) , 최낙철 (서울대학교 지역시스템공학과) , 박천영 (조선대학교 에너지.자원공학과)
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The Fe-component of pyrophyllite is an impurity that reduces its grade in the final product. In order to identify the amount of impurity in pyrophyllite and to remove the Fe from the ore using a dry method, microwave heating and magnetic separation were carried out. Pyrite and hematite were identifi...
| 핵심어 | 질문 | 논문에서 추출한 답변 |
|---|---|---|
| 엽납석의 물리/화학적 특성은 무엇인가? | 엽납석(pyrophyllite)은 수화규산염광물로 Al2O3가 28.35% 이상 함유되어 있고 모스경도가 겨우 1-2 정도이고 비중은 2.8-2.9 g/cm3 정도인 지방감촉을 느낄 수 있는 비금속광물을 말한다(Mukhopadhyay et al., 2010). 엽납석은 경도가 낮기 때문에 미분쇄가 용이하지만 1450-1480℃로 가열하면 mullite와 cristobalite가 생성되어 경도가 7-8 정도에 도달되고 파괴강도가 25-50 MPa에 이르게 된다(Abdrakhimova, 2010). 하지만 수축률은 겨우 3-4%에 지나지 않는다. 이러한 엽납석의 물리/화학적 특성 때문에 점토광물과 함께 산업광물로 활용되고 있다. | |
| 엽납석의 최종 산업제품의 품위를 저하시키고 있는 성분은? | 엽납석광석에 Fe-성분이 불순물로 작용하여 엽납석의 최종 산업제품의 품위를 저하시키고 있다. 엽납석광석에 존재하는 불순물을 광물-화학적으로 확인하고 마이크로웨이브와 자력선별을 이용하여 Fe 함량을 건식방법으로 감소시키고자 하였다. | |
| Fe 함량을 건식방법으로 감소시키는 방법은? | 엽납석광석에 Fe-성분이 불순물로 작용하여 엽납석의 최종 산업제품의 품위를 저하시키고 있다. 엽납석광석에 존재하는 불순물을 광물-화학적으로 확인하고 마이크로웨이브와 자력선별을 이용하여 Fe 함량을 건식방법으로 감소시키고자 하였다. 광학현미경, XRD, XRF, SEM/EDS 및 EPMA 분석을 통하여 엽납석에 황철석과 적철석이 포함되어 있는 것을 확인하였다. |
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