Study on Recycling of Electric Arc Furnace Dust

Anh Hoa Bui; Thanh Lam Vu; Van Thanh Nguyen

doi:10.4028/www.scientific.net/MSF.804.127

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HomeMaterials Science ForumMaterials Science Forum Vol. 804Study on Recycling of Electric Arc Furnace Dust

Study on Recycling of Electric Arc Furnace Dust

Abstract:

Electric arc furnace steelmakers are finding that dealing with the dust is increasingly difficult. Stockpiling this dust on site, recycling or sending offsite for disposal all entail considerable difficulties and costs. Succesful recycle of the valuable metals (iron, zinc) present in electric arc furnace dust will result in resource conservation while simultanuously reducing the disposal problem. In this research, carbothermic reduction of electric arc furnace dust using coke has been performed to observe the reduction ability and volatilization rate of zinc. Several properties of the dust were determined using chemical analysis, differential scanning calorimetry (DSC), X-ray diffraction (XRD), etc. It was found that the dust contained 24 %mass of iron, 14 %mass of zinc which stayed in oxide form. Experimental results shown that rates of the volatilization zinc in the dust were high, e.g. 96.45% at 1100°C. The activation energy of the reduction was calculated to be 210.63 kJ/mol in temperature range of 900 to 1100°C. Futher study on effective collection of iron and volatile zinc oxide must be carried out to obtain a suitble procedure of recycle of the electric arc furnace dust.

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Periodical:

Materials Science Forum (Volume 804)

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127-130

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https://doi.org/10.4028/www.scientific.net/MSF.804.127

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October 2014

Authors:

Anh Hoa Bui, Thanh Lam Vu, Van Thanh Nguyen

Keywords:

Carbothermic Reduction, Coke, Dust, Electric Arc Furnace, Volatilization

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