Global fitting functions for Fe-selective chlorination in ilmenite(FeTiO2) and successive chlorination of beneficiated TiO2 are proposed and validated based on a comparison with experimental data collected from the literature. The Fe-selective chlorination reaction is expressed by the unreacted shrinking core model, which covers the diffusion-controlling step of chlorinated Fe gas that escapes through porous materials of beneficiated TiO2 formed by Fe-selective chlorination, and the chemical reaction-controlling step of the surface reaction of unreacted solid ilmenite. The fitting function is applied for both chemical controlling steps of the unreacted shrinking core model. The validation shows that our fitting function is quite effective to fit with experimental data by minimum and maximum values of determination coefficients of R2 as low as 0.9698 and 0.9988, respectively, for operating parameters such as temperature, Cl2 pressure, carbon ratio and particle size that change comprehensively. The global fitting functions proposed in this study are expressed simply as exponential functions of chlorination rate(X) vs. time(t), and each of them are validated by a single equation for various reaction conditions. There is therefore a certain practical merit for the optimal process design and performance analysis for field engineers of chlorination reactions of ilmenite and TiO2.

Abstracts
 1. 서 론
 2. 이 론
  2.1 일메나이트 중 Fe의 선택염화반응
  2.2 미반응수축핵모델(Unreacted Shrinking CoreModel)
 3. 모델링방법
 4. 결과 및 고찰
  4.1 티탄 자철광의 선택적 탄소염화반응
  4.2 일메나이트광의 선택적 철염화
  4.3 산화배소된 일메나이트광의 Fe선택염화
  4.4 환원된 일메나이트(92 % TiO2)의 Ti염화
  4.5 티탄 슬래그의 Ti 탄소염화
  4.6 모델링 요약
 5. 결 론
 References

• 정동규(부경대학교 청정생산기술연구소) | Dong-Kyu Chung (Clean Manufacturing Technology Research Center, Pukyong National University)
• 원용선(부경대학교 화학공학과) | Yong Sun Won (Department of Chemical Engineering, Pukyong National University)
• 김용하(부경대학교 화학공학과) | Yong-Ha Kim (Department of Chemical Engineering, Pukyong National University) Corresponding author
• 정은진(포항산업과학연구원 금속재료연구그룹) | Eun-Jin Jung (Metallic Materials Research Group, Research Institute of Industrial Science & Technology)
• 송덕용(한국금속재료연구조합) | Duk-Yong Song (Korea Metal Material Research Association)