Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Deoxidation of Titanium Scrap by Calciothermic Reduction

칼슘열환원법(熱還元法)에 의한 타이타늄 스크랩의 탈산(脫酸)

  • Yoon, Moo-Won (Department of Materials Science and Metallurgical Engineering, Kyungpook National University) ;
  • Sohn, Ho-Sang (Department of Materials Science and Metallurgical Engineering, Kyungpook National University)
  • 윤무원 (경북대학교 금속신소재공학과) ;
  • 손호상 (경북대학교 금속신소재공학과)
  • Received : 2013.09.16
  • Accepted : 2013.10.31
  • Published : 2013.12.31
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Abstract

In this study, deoxidation of Ti scrap using liquid calcium was investigated. Experiments were conducted in a closed stainless steel chamber under Ar atmosphere during 30 to 90 minutes. Oxygen content of Ti scrap was reduced from 0.54 to 0.19 wt% by calciothermic reduction in 30 minutes at $1000^{\circ}C$ and 2.5 Ti/Ca mass ratio. By the calciothermic reduction of Ti scrap for 30 minutes under the reaction temperature of $1100^{\circ}C$ and 2.5 Ti/Ca mass, a minimum oxygen content of about 0.126 wt% in Ti scrap was obtained.

본 연구에서는 칼슘에 의한 타이타늄 스크랩의 탈산에 대하여 조사하였다. 타이타늄 스크랩의 탈산에 미치는 스크랩과 칼슘의 질량비, 반응시간, 반응온도, 입자크기, 그리고 산세조건의 영향에 대하여 검토하였다. 실험은 Ar 분위기의 밀폐된 스테인리스강제 반응기 내에서 30분에서 90분까지 실시하였다. 반응온도 $1000^{\circ}C$, Ti/Ca의 질량비 2.5인 조건에서 30분 동안의 칼슘 열환원반응에 의해 타이타늄 스크랩의 산소농도는 0.54에서 0.19 wt%로 감소하였다. Ti/Ca의 질량비 2.5에서 30분 동안 $1100^{\circ}C$에서 탈산한 타이타늄 스크랩의 산소농도는 최저 0.126 wt%를 나타내었다.

Keywords

References

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