Kinetics of Calcium Ferrite Formation at Initial Stage of Reaction in CaO-Fe<sub>2</sub>O<sub>3</sub> Mixed Bed

Guo Xingmin; Du Hegui

doi:10.13374/j.issn1001-053x.1998.03.031

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Guo Xingmin, Du Hegui. Kinetics of Calcium Ferrite Formation at Initial Stage of Reaction in CaO-Fe2O3 Mixed Bed[J]. Chinese Journal of Engineering, 1998, 20(3): 247-252. doi: 10.13374/j.issn1001-053x.1998.03.031

Citation:

Guo Xingmin, Du Hegui. Kinetics of Calcium Ferrite Formation at Initial Stage of Reaction in CaO-Fe₂O₃ Mixed Bed[J]. Chinese Journal of Engineering, 1998, 20(3): 247-252. doi: 10.13374/j.issn1001-053x.1998.03.031

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Kinetics of Calcium Ferrite Formation at Initial Stage of Reaction in CaO-Fe₂O₃ Mixed Bed

doi: 10.13374/j.issn1001-053x.1998.03.031

Guo Xingmin¹,
Du Hegui²

1. Applied Science School, UST Beijing, Beijing 100083, China;
2. School of Materials and Metallurgy, Northeastem University, Shenyang 110006, China

Received Date: 1997-09-26
Available Online: 2021-08-27

Abstract

Abstract

Kinetical model of calcium ferrite formation at initial stage of reaction in CaO-Fe₂O₃ mixed bed was obtained by using terms of theory as follows:
1-k₁(1-k₂BR_v)^2/3-k₂(1+k₁BR_v)^2/3=(2k₁M_f/ρ_fr_f²)·D_cΔCt.br/>其中k₁=(ρ_f-ρ_cf)/(ρ_f-ρ_c),k₂=(ρ_cf-ρ_c)/(ρ_f-ρ_c),B=1+M_cρ_fm/M_fρ_c. The results calculated by this model is identical very well with the experimental data, and the interdif-fusion coefficients of CaO in monocalcium ferrite were determined as 4.34×10^-9cm²/s and 2.32×10^-8cm²/s respectively at 1160 and 1190℃.
- mixed bed,
- formation,
- kinetics/calcium ferrite