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http://dx.doi.org/10.4191/KCERS.2010.47.6.613

Extraction of Mg ion and Fabrication of Mg Compound from Ferro-Nickel Slag  

Chu, Yong-Sik (Green Ceramic Division, Korea Institute of Ceramic Engineering & Technology)
Lim, Yoo-Ree (Test & Standard Center, Korea Institute of Ceramic Engineering & Technology)
Park, Hong-Bum (Green Ceramic Division, Korea Institute of Ceramic Engineering & Technology)
Song, Hun (Green Ceramic Division, Korea Institute of Ceramic Engineering & Technology)
Lee, Jong-Kyu (Green Ceramic Division, Korea Institute of Ceramic Engineering & Technology)
Lee, Seung-Ho (Green Ceramic Division, Korea Institute of Ceramic Engineering & Technology)
Publication Information
Journal of the Korean Ceramic Society / v.47, no.6, 2010 , pp. 613-617 More about this Journal
Abstract
Ferro-Nickel slag is one of the by-products in Ferro-Nickel manufacturing process. The slag is composed of $SiO_2$, MgO, $Fe_2O_3$ and others. But the slag has been buried at landfill despite having valuable elements. This study tried to extract Mg ion and fabricate Mg compound from ferro-nickel slag using hydrochloric acid solution. Mg ion was extracted with Si, Fe and other ions in HCl solution. So reprocess was needed for gaining high purity Mg ion. It was thought that Si ion or $SiO_2$ precipitated in HCl solution and removed from solution in filtering process. Fe ion converted into $Fe(OH)_3$ after reacted with $NH_4OH$ and precipitated in HCl solution. After these process, the filtrate was composed of high purity Mg ion. $MgCl_2{\cdot}NH_4Cl{\cdot}6H_2O$ was obtained through drying of filtrate and this product was changed into MgO by burning process ($600^{\circ}C$-30 min). That is, 1st material or solution for manufacturing 2nd product was fabricated using acid dissolution method and other treatments.
Keywords
Ferro-nickel slag; HCl solution; Mg ion; Mg compound; Filtering process;
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