Journal of the Korean Society for Heat Treatment (열처리공학회지)

The Korean Society for Heat Treatment (한국열처리공학회)
권호 표지
DOI QR코드

DOI QR Code

A Study on the Resource Development by Heat Dissolution in Electric Arc Furnace of Clinker generated in the Recycling Process of Electric Arc Furnace Dust

전기로 제강분진의 재활용과정에서 발생된 Clinker의 전기로에서의 가열용해에 의한 자원화에 관한 연구

  • Jae-hong Yoon (School of Materials Science & Engineering, Changwon National University) ;
  • Chi-hyun Yoon (School of Materials Science & Engineering, Changwon National University) ;
  • Akio Honjo (1-29-1-1013 Sodegaura, Chibaken, Narasinoshi, Japan )
  • 윤재홍 (창원대학교 공과대학 재료공학부) ;
  • 윤치현 (창원대학교 공과대학 재료공학부) ;
  • 本庄昭郎 (日本國 千葉県 習志野市 袖ヶ浦1-29-1-1013)
  • Received : 2023.01.12
  • Accepted : 2023.01.18
  • Published : 2023.01.30
Download PDF
⟨ Previous Next ⟩

Abstract

In general, when scrap is dissolved in an electric arc furnace, the amount of electric furnace steel dust (EAFD) generated is about 1.5% of the scrap charge amount, and the electric furnace steel dust collected by the bag filter is charged into the Rotary Kiln or Rotary Hearth Furnace (RHF), and the zinc component is recovered as crude zinc oxide, at which time a clinker of Fe-Base is generated. In this research, first, for the efficient resource conversion of electric furnace steel dust, a reduction and roasting experiment was conducted and the reaction kinetics was examined. As a result of the experiment, it was observed that the reduction and roasting reaction was actively conducted in the range of 1100~1150℃, and melting occurred in the range of 1250℃. In the past, this clinker was widely used as a roadbed material for road construction and an Fe-Source for cement production, but in recent years, it has been mainly reclaimed due to strengthening environmental standards. However, landfill treatment is by no means a desirable treatment method due to environmental pollution caused by leachate, expensive landfill costs, and waste of Fe resources. Therefore, in order to more actively recycle the Fe component in the clinker, first of all the clinker was pulverized into an optimal particle size, and anthracite and binder (starch) were added to the magnetic material obtained by specific gravity and magnetic separation for briquet. As a experimental results, it was possible to efficiently separate clinker as Fe component and other slag component by specific gravity and magnetic force. As a results of loading and dissolving the manufactured briquet clinker in an electric arc furnace, it was observed that the unit of power and production yield were clearly improved and the carbon addition effect in molten metal was also somewhat.

Keywords

Acknowledgement

이 논문은 2021-2022년도 창원대학교 자율연구과제 연구비지원으로 수행되었으므로, 이에 감사드립니다.

References

  1. B. S. Kim, J. M. Yoo, J. T. Park and J. C. Lee : Material Transactions, 47(9) (2006) 2421. 
  2. H. Oda, T. Ibaraki, and Y. Abe : Nippon-steel Technical Report, 94 (2006). 
  3. S. Nakazawa, T. Azakami and A. Yazawa : J. of MMIJ, (115), (1999) 781. 
  4. J. Ruetten : 10th Inst. Sympo. on East Asian Resource Recycling Technology (Earth 2009). 
  5. J. Yoon, C. Yoon, and M. Lee : J. of Korean Inst. of Resources Recycling, 26(3) (2017) 3. 
  6. J. Yoon, C. H. Yoon, and M. Lee : J of Korean Inst. of Resources Recycling, 23(1) (2014) 58. 
  7. J. Yoon and C. -H. Yoon : J of Korean Inst. of Resources Recycling, 30(1) (2021) 66. 
  8. B. J. Jung and S. M. Bae : J. of Korean Soild Wastes Engineering Society, 198(2) (2001) 121. 
  9. Mishara, N. Lamaro, I. Gaballah, and B. Dupre : TMS, Warrendal, PA (2002) 349. 
  10. B. K. Park, K. H. Lee, Y. H. Kim, and H. K. Shin : J. of the Korean Inst. of Met. & Mater. 36(3) (1998) 430. 
  11. N. I. Moon, M. Hino, Y. Lee, and K. Itagaki : J. of MMIJ, (113) (1997) 635. 
  12. Thomas Hilber et al. : REWAS'04 Global symposium on Recycling, Waste Treatment and Clean Technology, (3) (2004) 2159. 
  13. Y. -P. Lan, Q. -C. Liu, F. Meng, D. -L. Niu, and H. Zhao : Journal of Iron and Steel Research, International, 24(2) (2017) 165.