2014-Sustainable Industrial Processing Summit
SIPS 2014 Volume 3: Non-ferrous & Iron_Steel
| Editors: | Kongoli F |
| Publisher: | Flogen Star OUTREACH |
| Publication Year: | 2014 |
| Pages: | 522 pages |
| ISBN: | 978-1-987820-05-8 |
| ISSN: | 2291-1227 (Metals and Materials Processing in a Clean Environment Series) |
CD shopping page
Burnt to a crisp? - Why oxygen enhanced combustion does not have to influence steel oxidation
Christina Sobotka1; Helmut Antrekowitsch2;1MONTANUNIVERSITY LEOBEN- NICHTEISENMETALLURGIE, Leoben, Austria; 2MONTANUNIVERSITAET LEOBEN, Leoben, Austria;
Type of Paper: Regular
Id Paper: 55
Topic: 4
Abstract:
The steel industry has to face diverse challenges such as higher cost effectiveness, increased throughput capacities, pressure to cut fuel and reduce emissions (especially of CO2). Implementing oxygen enrichment to the burner systems of industrial reheating and forging furnaces is a perfect possibility to solve some of these challenges in an effective way. The most important issue of the usage of oxygen burners is the substantially increasing melting rate by lowering the specific production costs because of the higher combustion efficiency. Nevertheless, the change from air combusted burners to oxygen enriched heating systems is always a big step. A lot of forging and steel plants are uncertain to take. The major aim of the production is the quality of the product which should not be effected in any negative way. The implementation of oxygen in the burner system increases the heat transfer process beneficially, but also leads to a higher amount of CO2, H2O in the exhaust gas.
In this work, the influence of oxygen enhanced combustion on the scale formation of steel alloys in burner fired furnaces is investigated. Therefore, experiments with various steel grades are carried out using thermogravimetric analyses and compared with investigations in real forging and reheating furnaces using oxygen enriched burners.
The results imply that using oxygen enriched burners alters the kinetic model of the oxidation reaction. Under certain conditions, these changes lead to process parameters where oxy-fuel burner systems do not affect the scaling process negatively and can lead to a sustainable, energy efficient steel production. The process parameters e.g. the amount of oxygen enrichment, working temperature, furnace type and steel grades are described in this paper in details.