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Structural ceramics containing electric arc furnace dust.
V N Stathopoulos1, A Papandreou, D Kanellopoulou
1Ceramics and Refractories Technological Development Company, CERECO S.A., 72nd km Athens Lamia National Road, P.O. Box 18646, GR 34100 Chalkida, Greece; General Department of Applied Sciences, School of Technological Applications, Technological Educational Institute of Sterea Ellada, GR 34400 Psahna, Greece.
Journal of Hazardous Materials
|September 10, 2013
Summary
Electric arc furnace dust (EAFD) can be stabilized in structural clay ceramics. Incorporating EAFD into ceramic blocks enhances mechanical strength and immobilizes heavy metals, making them environmentally safe.
Area of Science:
- Materials Science
- Environmental Engineering
- Waste Management
Background:
- Electric Arc Furnace Dust (EAFD) is a significant industrial waste containing heavy metals.
- EAFD poses environmental risks due to heavy metal leaching.
- Recycling EAFD in construction materials offers a sustainable solution.
Purpose of the Study:
- To investigate the stabilization of EAFD in structural clay ceramics.
- To evaluate the potential of utilizing EAFD in the production of building blocks.
- To assess the environmental impact and mechanical properties of EAFD-containing ceramics.
Main Methods:
- Characterization of EAFD using Flame Atomic Absorption Spectroscopy, Powder XRD, and laser particle size analysis.
- Environmental testing of EAFD according to EN12457 standard to determine heavy metal leaching.
- Production and testing of ceramic blocks with varying EAFD content (2.5% and 5%) fired at different temperatures (850-950 °C).
- Pilot-scale production and quality control testing (dimensions, water absorption, compressive strength) of EAFD blocks.
Main Results:
- EAFD incorporation increased the mechanical strength of ceramic blocks.
- Leaching tests on EAFD-containing blocks showed heavy metal concentrations within regulatory limits.
- The study confirmed the stabilization of heavy metals within the ceramic matrix.
Conclusions:
- EAFD can be effectively stabilized in structural clay ceramics.
- EAFD-containing ceramic blocks are a viable and environmentally sound building material.
- This research demonstrates a promising route for EAFD valorization and waste reduction.
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