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http://dx.doi.org/10.7844/kirr.2021.30.1.66

A Study on the Separation and Recovery of Useful Metallic Elements(Zn, Pb) from the 2nd Dust in Refining of Crude-Zinc Oxide  

Yoon, Jae-hong (Department of Nano & Advanced Materials Science & Engineering, Changwon National University)
Yoon, Chi-hyun (Department of Nano & Advanced Materials Science & Engineering, Changwon National University)
Publication Information
Resources Recycling / v.30, no.1, 2021 , pp. 66-76 More about this Journal
Abstract
Electric arc furnace dust (EAFD) contains compounds, such as oxides and chlorides, including large quantities of Zn, Pb and Fe. An efficient and stable method for the extraction of metal elements from EAFD is the Rotary Kiln Process. This method is used to recover Zn in the form of crude ZnO (approximately 60%) via the addition of a reducing agent (coke, anthracite) and limestone (for basicity control) to EAFD. This process is commonly used in industry as well as in research and development. Currently, this method is used in many Korean commercial plants, producing approximately 150,000 tons of Crude ZnO per year. The majority of Zn is found in crude ZnO (approximately 76%). In addition components such as Pb, Cd, Sn, In, Fe, Cl, and F are present as oxides, chlorides, and alkaline compounds. This elements have an adverse effect on the zinc smelting process. Therefore, a refining process that eliminates these impurities is essential. In this study, we developed a process technology that efficiently separates Zn and Pb from byproducts (mainly chlorides). A bag filter was used to collect Zn and Pb generated during the dry purification process of crude ZnO. Pure components were recovered as metals or metal carbonate.
Keywords
EAFD (Electric Arc Furnace Dust); Recycling; Crude Zinc Oxide Roasting; Oxidation Roasting Products Recycling; $ZnCO_3(S)$; $PbCO_3(S)$;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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