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http://dx.doi.org/10.12925/jkocs.2010.27.4.12

The Elution effects by Sulfuric acid in the EAF dust  

Jeong, Rae-Youn (Dept. of Chemical Engineering, Seoul National University of Science and Technology)
Lee, Hyun-Pyo (Dept. of Chemical Engineering, Seoul National University of Science and Technology)
Lee, Jin-Hui (Dept. of Chemical Engineering, Seoul National University of Science and Technology)
Publication Information
Journal of the Korean Applied Science and Technology / v.27, no.4, 2010 , pp. 475-481 More about this Journal
Abstract
Elution effect was studied by the reactions between Electric arc furnace(EAF)dust and conc. or dil. sulfuric acid for the purpose of recoverying of the useful metals afterwards. The methods of mixing with acids and EAF dust for the elutions were depend on the ratios of acid/EAF dust. Experimental results showed that increased the ratios of sulfuric acids, decreased the elution effects are on the Zn, Fe and Mn, and conc. sulfuric acid showed higher elution effects than dil. sulfuric acids for the all metals. But in case of Pb, dil. sulfuric acid showed higher elution effects than conc. sulfuric acids conversely. Furthermore, the reason of the extreamly low quantities of eluted Pb is caused by the low solubilities by sulfuric acids compared to the other metals, as the results of the insoluble Pb is removed by the process of filtering.
Keywords
EAF dust; sulfuric acids; Zn; Fe; Mn; Pb; elution; filtering;
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