Study of the instability of black slags from electric arc furnace steel industry

Authors

  • M. Frías Instituto Eduardo Torroja (CSIC)
  • M. I. Sánchez de Rojas Instituto Eduardo Torroja (CSIC)
  • A. Uría Altuna y Uría, S. A

DOI:

https://doi.org/10.3989/mc.2002.v52.i267.328

Keywords:

electric arc furnace slag, chemical and mineralogical composition, expansive compounds

Abstract


In Spain, the steel manufacture produces important quantities of by-products, representing between 15 and 20 % of total steel production. Most by-products are deposited on open air spaces causing serious economical and environmental problems, internationally, different recycling wais are studied, being the main alternative for these by-products as recycled aggregate. The possibility of recycling these by-products in construction sector depends on its possible volume instability because of the presence of some undesirable compounds. In current paper, two different black slags from electric arc furnace steel industry were chemically characterized, paying attention to some well-known compounds by theirs expansion effects, such as: free CaO, free MgO, chlorides and sulphates. The analytical results carried out in the current research detected the presence of insignificant or null amounts of harmful compounds. Therefore, they should not have any negative incidence on phenomena of volume instability.

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Published

2002-09-30

How to Cite

Frías, M., Sánchez de Rojas, M. I., & Uría, A. (2002). Study of the instability of black slags from electric arc furnace steel industry. Materiales De Construcción, 52(267), 79–83. https://doi.org/10.3989/mc.2002.v52.i267.328

Issue

Section

Technical Note

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