Interaction of magnesia-ferriferous slag with sodium hydroxide solutions: Experimental and physicochemical modeling

Interaction of magnesia-ferriferous slag with sodium hydroxide solutions: Experimental and... The effect of carbon dioxide as milling medium on the ability of magnesia-ferriferous slag to dissolve in alkali solutions was examined. The degree of extraction of silicon and aluminum from the slag into a sodium hydroxide solution was studied in relation to the milling time in a ball mill, milling atmosphere, and NaOH concentration. The surface of slag particles mechanochemically carbonated upon grinding in a carbon dioxide atmosphere exhibits enhanced reactivity, which is consistent with an increase in the compression strength of geopolymer samples prepared on the basis of this slag. The experimental results are in good agreement with the results of thermodynamic modeling of the interaction of slags with alkali using Selektor program complex. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Russian Journal of Applied Chemistry Springer Journals

Interaction of magnesia-ferriferous slag with sodium hydroxide solutions: Experimental and physicochemical modeling

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Publisher
Springer Journals
Copyright
Copyright © 2015 by Pleiades Publishing, Ltd.
Subject
Chemistry; Chemistry/Food Science, general; Industrial Chemistry/Chemical Engineering
ISSN
1070-4272
eISSN
1608-3296
D.O.I.
10.1134/S1070427215070046
Publisher site
See Article on Publisher Site

Abstract

The effect of carbon dioxide as milling medium on the ability of magnesia-ferriferous slag to dissolve in alkali solutions was examined. The degree of extraction of silicon and aluminum from the slag into a sodium hydroxide solution was studied in relation to the milling time in a ball mill, milling atmosphere, and NaOH concentration. The surface of slag particles mechanochemically carbonated upon grinding in a carbon dioxide atmosphere exhibits enhanced reactivity, which is consistent with an increase in the compression strength of geopolymer samples prepared on the basis of this slag. The experimental results are in good agreement with the results of thermodynamic modeling of the interaction of slags with alkali using Selektor program complex.

Journal

Russian Journal of Applied ChemistrySpringer Journals

Published: Oct 25, 2015

References

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