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Vol.42, No.4, 369 ~ 376, 2004
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| Title |
| Kinetics of the Volatilization Reaction of Lead in EAF Dust |
| 김병수 Kim Byeong Su , 유재민 Yu Jae Min , 이재천 Lee Jae Cheon , 남철우 Nam Cheol U , 윤정모 Yun Jeong Mo |
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| Abstract |
| "he removal of lead from electric arc furnace (EAF) dust is important in the process for recovering zinc by a reduction-volatilization method. In this study, experiments on kinetics of the volatilization reaction of lead by chlorine components as NaCl and KCl contained in the EAF dust were carried out in the temperature range of 973 to 1223 K under an air atmosphere using a weight-loss technique. As a result, the volatilization ratio of lead was about 99.0% at the temperature of 1223 K and the reaction time of 180 min. Jander equation was found to fit well the volatilization reaction rate over the entire temperature range. The volatilization reaction of lead is rate controlled by solid-solid diffusion. An activation energy of 175 kJ/mol(41.8 kcal/mol) was obtained. (Received January 8, 2004) |
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| Key Words |
| EAF dust, Reduction-volatilization, Lead, Zinc |
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