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ISSN : 1225-0562(Print)
ISSN : 2287-7258(Online)
Korean Journal of Materials Research Vol.29 No.7 pp.412-424
DOI : https://doi.org/10.3740/MRSK.2019.29.7.412

Global Fitting Functions for Kinetics of Fe-Selective Chlorination in Ilmenite and Successive Chlorination of Beneficiated TiO2

Dong-Kyu Chung1,Yong Sun Won2,Yong-Ha Kim2†,Eun-Jin Jung3,Duk-Yong Song4
1Clean Manufacturing Technology Research Center, Pukyong National University, 365, Sinseon-ro, Nam-gu, Busan 48547, Republic of Korea
2Department of Chemical Engineering, Pukyong National University, 45, Yongso-ro, Nam-gu, Busan 48513, Republic of Korea
3Metallic Materials Research Group, Research Institute of Industrial Science & Technology, 67, Cheongam-ro, Nam-gu, Pohang, Gyeongsangbuk-Do 37673, Republic of Korea
4Korea Metal Material Research Association, 135, Jungdae-ro, Songpa-gu, Seoul 05717, Republic of Korea
Corresponding author
E-Mail : yhkim@pknu.ac.kr (Y.-H. Kim, PKNU)

Abstract

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.

일메나이트 중 철의 선택적 염화와 선광된 TiO2의 추가 염화반응에 대한 글로벌 피팅함수

정동규1,원용선2,김용하2†,정은진3,송덕용4
1부경대학교 청정생산기술연구소, 2부경대학교 화학공학과, 3포항산업과학연구원 금속재료연구그룹, 4한국금속재료연구조합

초록

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