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Steel converter slag as a raw material for precipitation of pure calcium carbonate / Sanni Eloneva in Industrial & engineering chemistry research, Vol. 47 N°18 (Septembre 2008) 

Public ISBD [article]  in Industrial & engineering chemistry research > Vol. 47 N°18 (Septembre 2008) . - p. 7104–7111 Titre : Steel converter slag as a raw material for precipitation of pure calcium carbonate Type de document : texte imprimé Auteurs : Sanni Eloneva, Auteur ; Sebastian Teir, Auteur ; Justin Salminen, Auteur Année de publication : 2008 Article en page(s) : p. 7104–7111 Note générale : Chemical engineering Langues : Anglais (eng) Mots-clés : Steel  converter  slag  Calcium  carbonate  Acetic  acid Résumé : In this work we study the possibility of utilizing steel converter slag, a byproduct of steel manufacturing, for production of pure calcium carbonate. The dissolution of calcium from steel converter slag by using acetic acid as a solvent and the precipitation of pure calcium carbonate from the resulting solution were experimentally investigated. It was found that, while strong solutions of acetic acid dissolve most of the calcium from the slag, weak acetic acid solutions dissolve calcium selectively. Precipitation of any substantial amount of calcium carbonate was found to require the addition of sodium hydroxide. Calcium conversion from the solution into the precipitate was as high as 86%, and the purity of the precipitate was over 99%. The calcium carbonate particles produced at low temperatures were found to have rhombohedral particle shapes, a very high brightness (98.7%), and a small particle size (mean value of 0.6 μm). En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8004034 [article] Steel converter slag as a raw material for precipitation of pure calcium carbonate [texte imprimé] / Sanni Eloneva, Auteur ; Sebastian Teir, Auteur ; Justin Salminen, Auteur . - 2008 . - p. 7104–7111. Chemical engineering Langues : Anglais (eng) in Industrial & engineering chemistry research > Vol. 47 N°18 (Septembre 2008) . - p. 7104–7111 Mots-clés : Steel  converter  slag  Calcium  carbonate  Acetic  acid Résumé : In this work we study the possibility of utilizing steel converter slag, a byproduct of steel manufacturing, for production of pure calcium carbonate. The dissolution of calcium from steel converter slag by using acetic acid as a solvent and the precipitation of pure calcium carbonate from the resulting solution were experimentally investigated. It was found that, while strong solutions of acetic acid dissolve most of the calcium from the slag, weak acetic acid solutions dissolve calcium selectively. Precipitation of any substantial amount of calcium carbonate was found to require the addition of sodium hydroxide. Calcium conversion from the solution into the precipitate was as high as 86%, and the purity of the precipitate was over 99%. The calcium carbonate particles produced at low temperatures were found to have rhombohedral particle shapes, a very high brightness (98.7%), and a small particle size (mean value of 0.6 μm). En ligne : http://pubs.acs.org/doi/abs/10.1021/ie8004034