Vlad Papangelakis

Vlad Papangelakis PowerPoint PPT Presentation


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Vlad Papangelakis

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3. Simulation of Laterite Acid Pressure Leaching

4. High Temperature Hydrometallurgy Processes between 150 - 270°C Mineral-water systems Mineral dissolution + salt precipitation Heterogeneous + multicomponent systems Saturated + supersaturated solutions High ionic strength (I = 2 - 3 M) Acid/base and redox reactions

5. Solution Chemistry Challenges Insufficient speciation information Very corrosive environments (pH<1) Chemical modelling Highly non ideal behaviour Multicomponent systems (SO4 and Cl mainly) Lack of physical data (densities, viscosities) Lack of thermodynamic data Heterogeneous + multicomponent systems

6. Research needs – opportunities? Species ID in very concentrated solutions Instrumentation for very corrosive environments (pH<1) Chemical modelling New thermodynamic data New speciation information - characterization Better solution models Better sampling techniques for saturated systems Sensor development for acid and redox

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