Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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An Experimental Study on Iron Recovery from Steelmaking Slag by Microwave Heating

마이크로웨이브 가열(加熱)을 이용(利用)한 제철(製鐵) 슬래그 중 철(鐵) 회수(回收)에 관한 실험적(實驗的) 연구(硏究)

  • Kim, Tae-Young (Department of Materials Science and Engineering, Korea University) ;
  • Kim, Eun-Ju (Department of Materials Science and Engineering, Korea University) ;
  • Shin, Min-Soo (Department of Materials Science and Engineering, Korea University) ;
  • Lee, Joon-Ho (Department of Materials Science and Engineering, Korea University)
  • 김태영 (고려대학교 신소재공학과) ;
  • 김은주 (고려대학교 신소재공학과) ;
  • 신민수 (고려대학교 신소재공학과) ;
  • 이준호 (고려대학교 신소재공학과)
  • Published : 2010.02.26
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Abstract

In order to understand the microwave carbothermic reduction of steelmaking slag to recover Fe, the effects of gas atmosphere and carbon addition on the carbothermic reduction behavior of CaO-$SiO_2$-FeO slag were investigated. It was found that the maximum temperature and the reduction rate were higher in air than in nitrogen atmosphere. In addition, under air atmosphere, the maximum temperature and the reduction rate were increased by increasing the amount of additive carbon. When the carbon equivalent is 5, the maximum temperature reached as high as 1800K and the reduction rate was approximately 90%. As the Carbon equivalent increased further, the maximum temperature and the reduction rate did not change.

본 연구에서는 마이크로웨이브 열탄소환원에 의한 제철 슬래그의 Fe 회수를 위한 기초연구로서, CaO-$SiO_2$-FeO계 슬래그의 열탄소환원 반응에 미치는 가스 분위기(질소 및 대기분위기) 및 탄소 첨가량의 영향을 살펴보았다. 실험결과, 질소 분위기에 비하여 대기 분위기에서 반응 시 최고 도달 온도 및 환원률이 증가하고, 대기 분위기에서는 탄소 당량 증가에 따라 최고 도달 온도 및 환원률이 증가하는 경향을 나타내었다. 대기 중 탄소 당량($C_{eq}$)이 5인 조건에서 최고 온도는 1800K에 도달하였으며 약 90%의 철회수율을 얻을 수 있었고, 탄소 당량이 5 이상 증가할 경우 최고 온도 및 환원율의 변화는 크지 않음을 알 수 있었다.

Keywords

References

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