2014-Sustainable Industrial Processing Summit
SIPS 2014 Volume 4: Recycling & Secondary Battery
| Editors: | Kongoli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2014 |
| Pages: | 498 pages |
| ISBN: | 978-1-987820-06-5 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Recycling of metallurgical wastes by a sustainable Ironbath Process
Gernot Roesler1; Juergen Antrekowitsch1; Christoph Pichler1;1CHRISTIAN DOPPLER LABORATORY FOR OPTIMIZATION AND BIOMASS UTILIZATION IN HEAVY METAL RECYCLING, Leoben, Austria;
Type of Paper: Regular
Id Paper: 33
Topic: 5
Abstract:
The strict changes in the legal regulations concerning the utilization of slags and dusts from the metallurgical sector lead to the invention of new recycling processes to recycle these heavy metals containing residues. The aim is, in one hand, to regain the valuable metals and, on the other hand, to produce a harmless slag, which can be used, for example, in road construction. Therefore, the Chair of Nonferrous Metallurgy at the University of Leoben, Austria, invented a new recycling process which fulfills the initially mentioned requirements.
Here, the recycling of slags and dusts takes place in a Top Blown Rotary Converter (TBRC), where the waste is charged on a carbon saturated iron bath. Depending on the waste material, a clinkering step has to be performed in advance to evolve disturbing halides. Typically, fossil petroleum coke is used as carburization agent to adjust the carbon content in the iron bath. To prevent the use of fossil carbons, the utilization of charcoal as carburization agent is considered.
For this purpose, a new continuous carbonization process was investigated, which should deliver high quality charcoal as alternative reducing agent for this new recycling process. Nevertheless, first trials are carried out using petroleum coke to elaborate the process regarding carburization time of the bath, reducing time of the residue, as well as slag handling to calculate an overall batch time for this process.
The goal of this project is to develop and optimize the described process in order to have an environmental friendly recycling process, which should be a future solution for atypical wastes from metallurgy. Especially the utilization of the obtained products without producing any waste material is a very important issue in this research.