자원리싸이클링 (Resources Recycling)

  • 제32권2호
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  • Pages.3-11
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  • 2023
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  • 2765-3439(pISSN)
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  • 2765-3447(eISSN)
한국자원리싸이클링학회 (The Korean Institute of Resources Recycling)
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Waelz Kiln 슬래그로부터 고품위 철 농축산물의 생산을 위한 최적 물리적 처리공정

The Optimal Physical Treatment Process for Production of High-grade Iron Concentrate from Waelz Kiln Slag

  • 한요셉 (한국지질자원연구원 자원활용연구본부 자원회수연구센터) ;
  • 김성민 (한국지질자원연구원 자원활용연구본부 자원회수연구센터) ;
  • 한성수 (한국지질자원연구원 자원활용연구본부 자원회수연구센터) ;
  • 김영재 (인하대학교 신소재공학과)
  • Yosep Han (Mineral Processing & Metallurgy Research Center, Resources Utilization Division, Korea Institute of Geoscience and Mineral Resources (KIGAM)) ;
  • Seongmin Kim (Mineral Processing & Metallurgy Research Center, Resources Utilization Division, Korea Institute of Geoscience and Mineral Resources (KIGAM)) ;
  • Seongsoo Han (Mineral Processing & Metallurgy Research Center, Resources Utilization Division, Korea Institute of Geoscience and Mineral Resources (KIGAM)) ;
  • Youngjae Kim (Department of Materials Science and Engineering, Inha University)
  • 투고 : 2023.01.21
  • 심사 : 2023.04.13
  • 발행 : 2023.04.30
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초록

본 연구에서는 Waelz Kiln(WK) 공정에 의해 발생되는 슬래그로부터 물리적 처리에 의해 60% 이상의 품위를 가지는 철 농축산물을 얻고자 하였다. 대상 WK 슬래그는 수 mm 크기의 조립자로서 슬래그의 T-Fe 함량은 40.24%, ZnO 함량은 1.03%으로 확인되었다. WK 슬래그는 실험실 로드밀을 이용하여 다양한 분쇄시간 동안 분쇄하였으며, 분쇄된 시료는 우선 저자력(0.05 T) 세기에서 선별되었다. 그 결과, 10분 분쇄된 시료에서 가장 높은 철 품위를 나타내었으며, 20분 분쇄시료를 대상으로 자력세기에 따라 실험한 결과, 보다 고자력인 0.8 T에서 가장 높은 품위 및 최고 수준의 회수율이 관측되었다. 앞선 결과들을 바탕으로 본 연구에서는 최적의 관련 물리적 처리공정을 제안하였으며, 최적 공정에 의해 얻어진 철 농축산물의 품위 그리고 농축율은 각각 61.34% 그리고 1.52으로 평가되었다.

The aim of this study was to develop a physical treatment method for obtaining iron concentrate with a grade higher than 60% from slag generated in the Waelz Kiln (WK) process. The size of the WK slag used in this work was several millimeters, with T-Fe and ZnO contents of 40.24% and 1.03%, respectively. The slag samples were pulverized in a laboratory rod mill for various grinding times, followed by a magnetic separation test under a low magnetic intensity of 0.05 T initially. The results showed that the highest iron grade was obtained from samples with a grinding time of 10 min. Additionally, for a grinding time of 20 min, the highest grade and recovery ratios were achieved at a magnetic intensity of 0.8 T. Based on these findings, the optimal physical treatment process proposed in this study resulted in iron concentrates with a grade of 61.34% and an enrichment ratio of 1.52.

키워드

과제정보

본 연구는 한국지질자원연구원 자체사업인 '저탄소 실현을 위한 제철부산물로부터 Zn 및 Fe 물리적 공정 기술 개발 연구(JP2020-002, 22-7507)' 그리고 '국내 부존 바나듐(V) 광물자원 선광/제련/활용기술 개발(GP2020-013, 23-3212)' 과제의 일환으로 수행되었다.

참고문헌

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