Recycling of Electric Arc Furnace Dust by Adding to Hot Metal

Abstract:

This research aims to study the process of incorporation of the metal iron contained in electric arc furnace dust (EAFD), by addition in hot metal at a temperature of 1,400 degrees Celsius altering experimental conditions such as how to add the EAFD (“as received” and in the form of briquettes), the percentage of EAFD to be added (10, 20 and 30% of initial weight of sample pig iron). The time of withdrawal of the sample of pig iron and slag (30 minutes after the addition of EAFD). Previously, the EAFD will be characterized using the following techniques: chemical analysis, particle size analysis, X-ray diffraction, scanning electron microscopy (SEM) and Energy Dispersive Spectroscopy (EDS) microanalysis. After characterization, the electric arc furnace dust to be added to the bath of liquid iron, will be divided into 2 types: the first order of addition will be in the form "as received" from the plant and the second is through the agglomeration of EAFD in the form of briquettes. The achievement of fusion experiments in laboratory scale will take place in a vertical tubular furnace with temperature control. The fusion experiments to assess the incorporation of the metal iron will use graphite crucibles. A flow of inert gas (argon) will be maintained inside the furnace during the experiments. It is expected that the results obtained at the end of the research allow the evaluation of the iron metal incorporation of electric arc furnace dust in pig iron bath.

• Periodical: Materials Science Forum (Volumes 727-728)
• Pages: 1740-1745
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.727-728.1740
• Online since: August 2012
• Authors: Vicente de Paulo Ferreira Marques Sobrinho, José Roberto de Oliveira, Victor Bridi Telles, Felipe Fardin Grillo, Jorge Alberto Soares Tenório, Denise Crocce Romano Espinosa
• Keywords: Briquettes, Dust, Recycling, Siderurgical Residue

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