Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Hydrochloric Acid Leaching Behavior of Mechanically Activated Black Dross

기계적 활성화처리한 블랙드로스의 염산 침출

  • Nguyen, Thi Hong (Department of Advanced Materials Science & Engineering, Institute of Rare Metal, Mokpo National University) ;
  • Nguyen, Thi Thuy Nhi (Department of Advanced Materials Science & Engineering, Institute of Rare Metal, Mokpo National University) ;
  • Lee, Man Seung (Department of Advanced Materials Science & Engineering, Institute of Rare Metal, Mokpo National University)
  • ;
  • ;
  • 이만승 (목포대학교 신소재공학과)
  • Received : 2018.04.17
  • Accepted : 2018.05.16
  • Published : 2018.06.30
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Abstract

Effect of ball milling treatment on the hydrochloric acid leaching performance of black dross was investigated to recover alumina. Ball milling time and speed showed limited effect on the leaching behavior of the alumina in the mechanically dross. Under the optimum mechanical activation condition (for 1h at 700 rpm), the leaching of alumina in hydrochloric acid solution was significantly affected by leaching time and reaction temperature. MgO was completely dissolved in most of the leaching conditions, while a small amount of Ca, Fe, Si and Ti oxides was dissolved. Although 80% of alumina was dissolved, the dissolved minor components such as Ca, Fe, Mg, Si and Ti oxides should be separated to recover pure alumina solution.

블랙드로스에 함유된 알루미나를 회수하기 위해 볼밀처리가 염산침출에 미치는 영향을 조사하였다. 볼밀처리 시간과 회전속도는 알루미나 침출에 큰 영향을 미치지 않았다. 최적의 볼밀처리(1시간, 700 rpm)에서 알루미나 침출은 침출시간과 온도에 영향을 받았다. 본 논문의 실험조건에서 산화마그네슘은 모두 용해되었으며, 칼륨, 철, 실리콘과 타이타늄 산화물은 일부만 용해되었다. 알루미나는 80% 정도 침출되었지만 상기 산화물이 미량 용해되므로 순수한 알루미나용액을 회수하기 위해서는 분리공정의 도입이 필요하다.

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References

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