Effects of Adding Iron Ores-based Calcium Ferrites to the Sinter Mix on Sinter Quality and Reduction of CO&lt;sub&gt;2&lt;/sub&gt;, NO and SO&lt;sub&gt;2&lt;/sub&gt;

Rocha, Leonardo Tomas da; Cho, Seongkyu; Kim, Sung‐Wan; Jung, Seung Boo

doi:10.2355/isijinternational.isijint-2022-127

ISIJ Int.

2022

DOI: 10.2355/isijinternational.isijint-2022-127

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Effects of Adding Iron Ores-based Calcium Ferrites to the Sinter Mix on Sinter Quality and Reduction of CO<sub>2</sub>, NO and SO<sub>2</sub>

Leonardo Tomas da Rocha

Seongkyu Cho

Sung‐Wan Kim

et al.

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2024

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Cited by 6 publications

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Competitive Formation Behavior of Calcium Silicate and Calcium Ferrite in Sintering of Iron Ore Fines

Du,

Wei,

Guo

2024

steel research int.

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Calcium silicate is the undesirable bonding phase in sinter with relatively high melting point and poor reducibility, while the formation mechanism in sinter is ambiguous. Herein, the phase transformation, phase quantification, and morphology evolution of calcium silicate and calcium ferrite in CaO‐SiO2‐Fe2O3‐Al2O3 systems under different n(Fe2O3)/n(CaO) and Al2O3 content are investigated. It is found that with the increase of n(Fe2O3)/n(CaO), the calcium ferrite phases transform from Ca2Fe2O5 (C2F) to complex calcium ferrite, and calcium silicate phases including β‐Ca2SiO4 (β‐C2S) and γ‐Ca2SiO4 (γ‐C2S) are promoted. Moreover, small amount (2%) of Al2O3 can effectively promote the content of silico‐ferrite of calcium and aluminum (SFCA) increasing from 20.95% to 46.69%, whereas inhibiting the β‐C2S from 51.79% to 42.34%. When the content of Al2O3 is over 4%, the Ca2Al(AlSiO7) phase is formed, where both the SFCA and calcium silicate are inhibited. On this base, the competitive mechanism for the formation of calcium silicate and calcium ferrite is revealed, where the Ca2+ and Si4+ are preferred to react with Fe3+ and Al3+ to form liquid phase SFCA, while the amount for β‐C2S or γ‐C2S can be decreased due to the deprivation of Ca2+ and Si4+.

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Competitive Formation Behavior of Calcium Silicate and Calcium Ferrite in Sintering of Iron Ore Fines

Du,

Wei,

Guo

2024

steel research int.

View full text Add to dashboard Cite

show abstract

Displacement and Migration Behavior of Al3+ in Ca2Fe2−xAlxO5 Solid Solution During Reduction Process

Du,

Guo

2024

Metall Mater Trans B

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A New Approach of Pelletizing: Use of Low-Grade Ore as a Potential Raw Material

Kim,

Yoo,

Tomas da Rocha

et al. 2024

J. Sustain. Metall.

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Effects of Adding Iron Ores-based Calcium Ferrites to the Sinter Mix on Sinter Quality and Reduction of CO<sub>2</sub>, NO and SO<sub>2</sub>

Cited by 6 publications

References 47 publications

Competitive Formation Behavior of Calcium Silicate and Calcium Ferrite in Sintering of Iron Ore Fines

Competitive Formation Behavior of Calcium Silicate and Calcium Ferrite in Sintering of Iron Ore Fines

Displacement and Migration Behavior of Al3+ in Ca2Fe2−xAlxO5 Solid Solution During Reduction Process

A New Approach of Pelletizing: Use of Low-Grade Ore as a Potential Raw Material

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