ENERGY BALANCE OF THE REDUCTION PROCESS OF IRON-BEARING WASTE MATERIALS

1 LIS Teresa
Co-authors:
2 NOWACKI Krzysztof 3 GIL Stanisław
Institutions:
1 Silesian University of Technology, Faculty of Materials Engineering and Metallurgy, Katowice, Poland, EU, teresa.lis@polsl.pl
2 Silesian University of Technology, Faculty of Materials Engineering and Metallurgy, Katowice, Poland, EU, krzysztof.nowacki@polsl.pl
3 Silesian University of Technology, Faculty of Materials Engineering and Metallurgy, Katowice, Poland, EU, stanislaw.gil@polsl.pl
Conference:
27th International Conference on Metallurgy and Materials, Hotel Voronez I, Brno, Czech Republic, EU, May 23rd - 25th 2018
Proceedings:
Proceedings 27th International Conference on Metallurgy and Materials
Pages:
149-156
ISBN:
978-80-87294-84-0
ISSN:
2694-9296
Published:
24th October 2018
Proceedings of the conference were published in Web of Science and Scopus.
Metrics:
46 views / 26 downloads
Abstract

The metallurgical industry is a trade where large amounts of waste are generated, including mill scale and iron-bearing sludge, which in the reduction process can be a valuable raw material for the production of sponge iron. In this publication the energy balance for such a process has been prepared and it has been shown that the electrical energy flow necessary to carry out reduction of mill scale with a CO + H2 gas solution is 17.48% of the total energy stream supplied to the process. The highest value of the supplied energy stream is chemical energy brought with a reducing gas of approx. 71.65%. The largest energy losses occur in gaseous products of reduction and constitute 57.15% of the total energy flux of products. Raising the temperature of the reaction gas from 25°C to 300°C reduces the electricity consumption about 14%. The determined energy losses to the environment are strongly dependent on the final design of the reactor for the reduction of iron-bearing materials.

Keywords: Reduction, iron-bearing waste materials, energy balance
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