Lixiviación de metales pesados a partir de escorias de acero

J. F. P Gomes; C. G. Pinto

doi:10.3989/revmetalm.2006.v42.i6.39

Leaching of heavy metals from steelmaking slags

Authors

J. F. P Gomes Centro de Tecnologias Ambientais, Instituto de Soldadura e Qualidade, Tagus Park. Universidade Lusófona de Humanidades e Tecnologias
C. G. Pinto Centro de Tecnologias Ambientais, Instituto de Soldadura e Qualidade, Tagus Park

DOI:

https://doi.org/10.3989/revmetalm.2006.v42.i6.39

Keywords:

Steelmaking slags, Leaching tests, Environmental impact

Abstract

Leaching tests with EAF and Ladle slags were performed, using a flow through test and the standard batch test DIN 38414-S4. The previous method was used to simulate the leaching behaviour of steel slags under landfill. The chemical analysis of the leachates during this period shows, in general, for both types of slag, an increase of heavy metal releases with ageing. Standard test method DIN 38414-S4 was used to evaluate leachability of heavy metals by water in unprocessed slags. After more than one year of trials, slag samples submitted to these trials presented very low total leaching levels. The most extracted elements are calcium and magnesium. Nevertheless, in flow-through test, calcium and magnesium leached from solid slags are below 0.5% and all other metals below 0.1%. Leachates obtained with DIN 38414-S4 present, as expected, higher leaching values; however, these are inferior to 5 % (Ca) and 1% (other elements).

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References

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Published

2006-12-30

How to Cite

Gomes, J. F. P., & Pinto, C. G. (2006). Leaching of heavy metals from steelmaking slags. Revista De Metalurgia, 42(6), 409–416. https://doi.org/10.3989/revmetalm.2006.v42.i6.39

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Issue

Vol. 42 No. 6 (2006)

Section

Articles

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