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PLENARY LECTURES AND VIP GUESTS
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Tomas Havlik
Technical University of Kosice, Faculty of Metallurgy,
Leaching Of Eaf Steelmaking Dust In Sulfuric Acid Dilute Solution: Case Of Calcium
3rd Intl. Symp. on Sustainable Materials Recycling Processes and Products[]
Back to Plenary Lectures »
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Abstract:
In this study, the hydrometallurgical processing of EAF steelmaking dust (Ironworks Podbrezova) was investigated in laboratory scale. The behavior of calcium under the influence of sulphuric acid as the leaching agent is discussed. The main aim is the transfer of zinc into the solution while iron ought to remain as a solid residue. Calcium, too, is transferred to the solution, but due to its low solubility, it is precipitated from solution into solid residue. Acid is continuously consumed, spending gradually calcium phase from EAF dust and also other zinc and iron containing phases. In such a way, it is possible to set up the conditions for the leaching of EAF dust, namely sufficient sulphuric acid concentration in order to achieve an optimum zinc yield to the solution without iron dissolution. However, the problem is that the calcium content of each steelmaking dust is individual. Therefore, it is necessary to study the processing conditions for each one of them.
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