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2011-Sustainable Industrial Processing Summit
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| Editors: | Florian K |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2012 |
| Pages: | 708 pages |
| ISBN: | 978-0-9879917-1-3 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
Reduction Kinetics Of Stainless Steel Plant Dust By Graphite In A Microwave Field
Guojun Ma1; Weihou Su1; Yibiao Jin1;1WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY, Wuhan, China;
Type of Paper: Regular
Id Paper: 126
Topic: 5
Abstract:
Reaction kinetics of electric arc furnace dust (EAFD) from stainless steel plant with different ratios of graphite addition by microwave (MW) irradiation was studied. The reduction experiments were conducted in a microwave muffler furnace at 2.45GHz and microwave power of 1200W. At normal pressure, the specimen was reacted in the furnace chamber with no protective atmosphere and normal pressure. The results showed that the reduction fraction of dust was enhanced at the higher temperature and using more content of graphite. Compared with the conventional heating methods, it can reduce the temperature and the amount of reducing agent by microwave heating. The results also showed that the solid/solid interface or local chemical reaction is the limitation step of carbothermic reduction of stainless steel plant dust in a microwave field. According to the calculation results with Arrhenius equation, the apparent activation energy of the solid/solid interface or local chemical reaction is between 20.87 ~ 30.73 kJ/mol. Moreover, the pre-exponential factors of reduction reaction decrease with the carbon content and activation energy.