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Kinetic Study on Desulfurization of Hot Metal Using CaO and CaC2
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Micro-Modelling.
KTH, School of Industrial Engineering and Management (ITM), Materials Science and Engineering, Micro-Modelling.ORCID iD: 0000-0002-3548-8638
2015 (English)In: Metallurgical and materials transactions. B, process metallurgy and materials processing science, ISSN 1073-5615, E-ISSN 1543-1916, Vol. 46, no 1, 83-92 p.Article in journal (Refereed) Published
Abstract [en]

The kinetics and reaction mechanisms of hot metal desulfurization using CaO and CaC2 were studied in a well-controlled atmosphere with a lab scale high temperature furnace. The growths of CaS around CaO and CaC2 were measured and compared at 1773 K (1500 degrees C). The parabolic rate constant was evaluated to be 5 x 10(-7) (cm s(-1)) on CaO particles, and 2.4 x 10(-7) (cm s(-1)) on CaC2. The bigger parabolic constant of CaO resulted in more efficient desulfurization. Agglomerates and big CaO particles led to 2CaO center dot SiO2 formation which hindered further utilization of CaO for desulfurization. The 2CaO center dot SiO2 formation was favoured by a high oxygen potential. Since the desulfurization reaction of CaO not only produced CaS but also oxygen, the local oxygen concentration around big CaO particles was higher than around small particles.

Place, publisher, year, edition, pages
2015. Vol. 46, no 1, 83-92 p.
National Category
Metallurgy and Metallic Materials
Identifiers
URN: urn:nbn:se:kth:diva-160380DOI: 10.1007/s11663-014-0195-8ISI: 000348199900012Scopus ID: 2-s2.0-84925541351OAI: oai:DiVA.org:kth-160380DiVA: diva2:791011
Note

QC 20150226

Available from: 2015-02-26 Created: 2015-02-19 Last updated: 2017-12-04Bibliographically approved

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