2018-Sustainable Industrial Processing Summit
SIPS2018 Volume 1. Afonso Intl. Symp. / Iron and Steel Making
| Editors: | F. Kongoli, M.-C. Gomez-Marroquin, M. Contrucci, N. Lacerda, F. V. Cancado, M. de Souza, R. Valladares |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2018 |
| Pages: | 184 pages |
| ISBN: | 978-1-987820-82-9 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
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Reduced Environmental Impact and Increased Energy and Material Recovery in the Ferro-alloy Industry Through Staged Combustion of Flue Gas
Torbjørn Pettersen1; Bernd Wittgens2; Olaf Trygve Berglihn2; Balram Panjwani2; Benjamin Ravary3; Edin Myrhaug4;1SINTEF INDUSTRY, 7034 Trondheim, Norway; 2SINTEF, Trondheim, Norway; 3ERAMET NORWAY, Trondheim, Norway; 4ELKEM AS, Trondheim, Norway;
Type of Paper: Plenary
Id Paper: 54
Topic: 2
Abstract:
The Norwegian ferro-alloy industry is a world leader in sustainable production of ferro-silicon, silicon, and manganese alloys. Even if the industry is currently operating with very low specific energy consumption, there is a considerable amount of energy available in the off-gas from the submerged arc furnaces, both in terms latent heat and unconverted chemical energy. For FeMn production, the off-gas also contains mineral rich particles which are contaminated by tar and polycyclic aromatic hydrocarbon (PAH) components. The dust particles are currently removed from the off-gas and deposited as a wet sludge waste stream.
Results from recent experimental validation are presented for a new concept for off-gas processing, which enables an increased energy recovery and can facilitate future material recovery through production of tar and PAH free mineral dust. New results from a techno-economic evaluation of the concept will be presented, including ideas for material recovery from the currently unutilized waste stream. The overall objective is a maximized energy recovery and simultaneously prepare for a comprehensive reduction of waste streams.
Keywords:
Ferro-Alloys; Industry; Sustainability; Technology;References:
[1] Y. Ladam, M. Tangstad, and B. Ravary, "Energy mapping of industrial ferroalloy plants", presented at the The thirteenth International Ferroalloys Congress, Almaty, Kazakhstan, 2013, pp. 919-925.[2] S. Gaal, M. Tangstad, and B. Ravary, "RECYCLING OF WASTE MATERIALS FROM THE PRODUCTION OF FeMn AND SiMn", presented at the The Twelfth International Ferroalloys Congress Sustainable Future, Helsinki, Finland, 2010.
[3] B. Wittgens, B. Panjwani, T. Pettersen, R. Jensen, B. Ravary, and D.-O. Hjertenes,"SCORE: Staged Combustion for Energy Recovery in Ferro-alloy Industries - Experimental Validation", Infacon XV Int. Ferro-Alloys Congr., 2018.