Carbothermic Reduction of Zinc and Iron Oxides in Electric Arc Furnace Dust

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• 作者：Hui-ning ZHANG^aAuthor Vitae ; Jian-li LI^b ; An-jun XU^c ; ^{anjunxu@126.com" class="auth_mail} ; Qi-xing YANG^d ; Dong-feng HE^c ; Nai-yuan TIAN^c
• 关键词：electric arc furnace ; dust ; reduction ; ZnO ; ZnFe2O4
• 刊名：Journal of Iron and Steel Research, International
• 出版年：April, 2014
• 年：2014
• 卷：21
• 期：4
• 页码：427-432
• 全文大小：494 K

文摘

The reduction of zinc and iron oxides from electric arc furnace dust (EAFD) by carbon was investigated at temperatures between 800 and 1300 掳C. The analytic technique employed includes chemical analysis, X-ray fluorescence spectroscopy (XRF), X-ray powder diffraction (XRD), scanning electron microscopy (SEM) equipped with X-ray energy dispersive spectrometry (EDS), and thermodynamic database FactSage 6. 2. It was found that the reduction of zinc and iron oxides depends largely on Boudouad reaction. At 900 掳C, zinc exists in tested samples as ZnO, which is reduced in the temperature range of 1000 鈥?1100 掳C. At 1100 掳C, 99. 11% of the zinc is evaporated. The metallization ratio of Fe is 79. 19% at 1300 掳C, as the content of Fe²⁺ is still 9. 40%. A higher temperature is thus required for a higher reduction degree of Fe oxides by solid or gaseous carbon.