Effect of CaF2 and MnO on Mold Powder Viscosity and Solidification During High-Speed Continuous Casting

Effect of CaF2 and MnO on Mold Powder Viscosity and Solidification During High-Speed Continuous... Mold powders (MP) are used as raw materials in steel smelting production. In this work TiO2, Na2CO3, MnO, and ZnO are used in a MP composition in order to reduce the CaF2 content or to replace it; CaF2 is used in order to prepare powder, similar to the commercial powder used in steel pouring. Agroove viscometer is used to study MP specimen viscosity, and x-ray diffraction XRD and scanning electron microscopy SEM are used for analyzing specimen behavior during crystallization. Results of studies show that there is cuspidine in XRD diffraction patterns of some specimens. It is established that glassy phase white crystals of cuspidine formed make it possible the regulate MP viscosity required for forming a lubricating layer between mold walls and a steel ingot shell. With use of MnO in MP in an amount of about 4 wt.% (apart from MnO within a specimen chemical composition) alongside F− in an amount of 2 wt.% low-fluorine MP specimens are prepared that may serve as a substitute for MP normally used in steel continuous casting. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Refractories and Industrial Ceramics Springer Journals

Effect of CaF2 and MnO on Mold Powder Viscosity and Solidification During High-Speed Continuous Casting

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Publisher
Springer US
Copyright
Copyright © 2013 by Springer Science+Business Media New York
Subject
Material Science; Characterization and Evaluation of Materials; Materials Science, general; Ceramics, Glass, Composites, Natural Methods
ISSN
1083-4877
eISSN
1573-9139
D.O.I.
10.1007/s11148-013-9575-x
Publisher site
See Article on Publisher Site

Abstract

Mold powders (MP) are used as raw materials in steel smelting production. In this work TiO2, Na2CO3, MnO, and ZnO are used in a MP composition in order to reduce the CaF2 content or to replace it; CaF2 is used in order to prepare powder, similar to the commercial powder used in steel pouring. Agroove viscometer is used to study MP specimen viscosity, and x-ray diffraction XRD and scanning electron microscopy SEM are used for analyzing specimen behavior during crystallization. Results of studies show that there is cuspidine in XRD diffraction patterns of some specimens. It is established that glassy phase white crystals of cuspidine formed make it possible the regulate MP viscosity required for forming a lubricating layer between mold walls and a steel ingot shell. With use of MnO in MP in an amount of about 4 wt.% (apart from MnO within a specimen chemical composition) alongside F− in an amount of 2 wt.% low-fluorine MP specimens are prepared that may serve as a substitute for MP normally used in steel continuous casting.

Journal

Refractories and Industrial CeramicsSpringer Journals

Published: Nov 20, 2013

References

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