Steel converter slag as a raw material for precipitation of pure calcium carbonate

Sanni Eloneva; Sebastian Teir; Justin Salminen; Carl-Johan Fogelholm; Ron Zevenhoven

doi:10.1021/ie8004034

Steel converter slag as a raw material for precipitation of pure calcium carbonate

Sanni Eloneva (Corresponding Author), Sebastian Teir, Justin Salminen, Carl-Johan Fogelholm, Ron Zevenhoven

Research output: Contribution to journal › Article › Scientific › peer-review

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Abstract

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).

Original language	English
Pages (from-to)	7104-7111
Number of pages	8
Journal	Industrial & Engineering Chemistry Research
Volume	47
Issue number	18
DOIs	https://doi.org/10.1021/ie8004034
Publication status	Published - 2008
MoE publication type	A1 Journal article-refereed

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Eloneva, S., Teir, S., Salminen, J., Fogelholm, C-J., & Zevenhoven, R. (2008). Steel converter slag as a raw material for precipitation of pure calcium carbonate. Industrial & Engineering Chemistry Research, 47(18), 7104-7111. https://doi.org/10.1021/ie8004034

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abstract = "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).",

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AU - Zevenhoven, Ron

PY - 2008

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AB - 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).

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