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Electrolytic iron production from alkaline bauxite residue slurries at low temperatures

Koutsoupa Sevasti; Koutalidi Stavroula; Bourbos Evangelos; Balomenos Efthymios; Panias Dimitrios


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    <dct:description>&lt;p&gt;The primary iron metallurgy is characterized by significant direct CO2 emissions, due to the&lt;br&gt; carbothermic reduction of the iron ore. This paper deals with the electrification of primary&lt;br&gt; iron production by developing a new and innovative process for the carbon-free production&lt;br&gt; of metallic iron from Bauxite Residue (BR) which is a by-product of the alumina industry. It&lt;br&gt; is based on the electroreduction of iron oxides from BR suspensions in concentrated sodium&lt;br&gt; hydroxide solutions, at low temperature and normal pressure. The iron oxide source, used&lt;br&gt; in the present study is bauxite residue provided by Mytilineos S.A., Metallurgy Business&lt;br&gt; Unit-Aluminium of Greece. The research study is a preliminary screening of BR as a&lt;br&gt; potential raw material for iron production by performing experiments in a small-scale&lt;br&gt; electrolysis cell. The first results presented here, show that iron can be produced by the&lt;br&gt; reduction of iron oxides in the bauxite residue with high Faradaic efficiency (&amp;gt;70%).&lt;br&gt; Although significant optimization is needed, the novel process shows great promise.&lt;/p&gt;</dct:description>
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