STUDY OF ZINC AND LEAD THERMAL REDUCTION FROM A STEELMAKING SLUDGE

1 KURKA Vladislav
Co-authors:
1 JONŠTA Petr 1 KANDER Ladislav 1 NOGA Roman 1 KOTÁSEK Ondřej
Institution:
1 MATERIAL AND METALLURGICAL RESEARCH Ltd., Ostrava, Czech Republic, EU, petr.jonsta@mmvyzkum.cz
Conference:
32nd International Conference on Metallurgy and Materials, Orea Congress Hotel Brno, Czech Republic, EU, May 17 - 19, 2023
Proceedings:
Proceedings 32nd International Conference on Metallurgy and Materials
Pages:
95-100
ISBN:
978-80-88365-12-9
ISSN:
2694-9296
Published:
13th June 2023
Metrics:
78 views / 40 downloads
Abstract

The influence of varying thermal treatment conditions on reducing zinc and lead content from a steelmaking sludge was studied. The Waelz process in a laboratory rotary kiln was used for the experiments. It was found that the level of zinc and lead reduction strongly depends on used atmosphere and the reducing element used. A significant reduction of the zinc and lead content (well below 1 wt. %) was achieved at temperatures of 1,000 °C, respectively. A neutral atmosphere and high graphite content reduced the zinc and lead very efficiently. A nitrogen atmosphere caused the reduction of zinc and lead even without the use of an additional reducing agent; the carbon contained in the sludge was used for the reduction.

Keywords: Steelmaking sludge, laboratory rotary kiln, carbothermic reduction, zinc, lead

© This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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