Resources Recycling (자원리싸이클링)

The Korean Institute of Resources Recycling (한국자원리싸이클링학회)
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Removal of Iron from Ilmenite through Selective Chlorination Using PVC

PVC에 의한 일메나이트 광석 중 선택염화에 의한 Fe의 제거

  • Son, Yongik (School of Materials Science and Engineering, Kyungpook National University) ;
  • Ring, Rie (School of Materials Science and Engineering, Kyungpook National University) ;
  • Sohn, Ho-Sang (School of Materials Science and Engineering, Kyungpook National University)
  • 손용익 (경북대학교 신소재공학부) ;
  • 링리에 (경북대학교 신소재공학부) ;
  • 손호상 (경북대학교 신소재공학부)
  • Received : 2016.05.02
  • Accepted : 2016.06.10
  • Published : 2016.06.30
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Abstract

Study on chlorination of ilmenite ore were carried out by using PVC(polyvinyl chloride) as the chlorinating agent in a static bed reactor for selective removal of iron. The effect of amount of PVC and reaction temperature were investigated. It was found that the removal ratio of iron increased with amount of PVC and temperature. After reaction with HCl gas generated from PVC, porous surface of the specimens were observed. As a result, HCl gas could react with iron in the central portion of ilmenite particle through these pores. Examination of data using kinetic model suggest that the selective chlorination rate is controlled by chemical reaction at the interface of particles. The activation energy for the selective chlorination of ilmenite using PVC was calculated as 20.47 kJ/mol.

고정층 반응기에서 PVC를 염화제로 사용하여 일메나이트 광석 중 철을 선택적으로 제거하기 위한 염화반응에 대하여 조사하였다. 철의 제거율에 미치는 PVC첨가량과 반응온도의 영향에 대하여 조사하였다. 철의 제거율은 PVC 첨가량과 온도가 증가할수록 상승하였다. PVC에서 생성된 HCl가스와 반응한 후의 시편 표면에는 많은 기공이 관찰되었다. 이러한 기공에 의해서 일메나이트 입자의 중앙부분에 있는 철과 반응할 수 있었던 것으로 생각된다. 선택적 염화반응을 속도론적 모델에 의해 조사한 결과 입자 계면에서의 화학반응에 의해서 율속되는 것으로 생각된다. PVC를 사용한 일메나이트의 선택적 염화반응에서 활성화 에너지는 20.47 kJ/mol로 계산되었다.

Keywords

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