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Recovery of iron as a form of ferrous acetate precipitates from low-grade magnetite ore
This paper describes the recovery process of iron as a form of ferrous acetate from low-grade magnetite ore (Shinyemi Mine, Gangwon province, Korea). The magnetically separated magnetite powder was dissolved in aqueous oxalic acid solution. The dissolution fraction of magnetite concentrates was meas...
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Published in: | Chemical engineering research & design 2010-11, Vol.88 (11), p.1467-1473 |
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Main Authors: | , , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | This paper describes the recovery process of iron as a form of ferrous acetate from low-grade magnetite ore (Shinyemi Mine, Gangwon province, Korea). The magnetically separated magnetite powder was dissolved in aqueous oxalic acid solution. The dissolution fraction of magnetite concentrates was measured as a function of initial pH, reaction temperature and oxalic acid concentration. Optimum conditions for dissolution of magnetite ore were the temperature higher than 90
°C, pH 1 and oxalic acid concentration 0.5
M. Addition of aqueous H
2O
2 solution oxidized ferrous ion of iron-containing solution. And then, at pH 4, ferric hydroxide was precipitated from iron-containing solution by the addition of NaOH aqueous solution. Ferrous acetate was prepared from the reaction between ferric hydroxide and acetic acid/acetic anhydride mixture and quantitatively characterized by ICP-AES, XRD, SEM, FT-IR and XPS. Purity of ferrous acetate was found to be 91.88% with other impure elements such as Na, Ca, K, Mg and Al by ICP-AES and XPS analysis. XRD and SEM analysis showed that as-prepared ferrous acetate in the present experiments was in low crystalline state. FT-IR spectra confirmed the presence of free acetate ions and monoacetato bidentate structure in as-prepared ferrous acetate. |
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ISSN: | 0263-8762 |
DOI: | 10.1016/j.cherd.2009.08.011 |