Research projects

Pure Metals


Year Publication
Year Publication
2021article in scientific journal
Alternative fractional crystallization-based methods to produce high-purity Aluminum
Journal of Materials Research and Technology; DOI: 10.1016/j.jmrt.2021.03.025; https://www.sciencedirect.com/science/article/pii/S2238785421002519
Semiramis Friedrich geb. Akbari, Danilo Curtolo, Martin Rodriguez, Bernd Friedrich,
2021article in scientific journal
The Influence of Initial Purity on the Refining Efficiency of Aluminium via Zone Refining
Metals 2021, 11(2), 201, https://doi.org/10.3390/met11020201
Xiaoxin (Jason) Zhang, Semiramis Friedrich geb. Akbari, Bernd Friedrich,
2020article in scientific journal
Numerical and experimental investigation of Germanium refining via fractional crystallization based innovative rotary cooling device
Metals 2020 DOI: 10.3390/met10070973
Semiramis Friedrich geb. Akbari, Danilo Curtolo, Bernd Friedrich, Michael Nowack
2019article in scientific journal
Refining Principles and Technical Methodologies to Produce Ultra-Pure Magnesium for High-Tech Applications
Metals 9 (2019), Online-Artikel DOI: 10.3390/met9010085
Semiramis Friedrich geb. Akbari, Seifeldin Raslan Mohamed, Bernd Friedrich,
2019congress or congress paper
Investigation of Process Parameters in a Vacuum Distillation Setup to produce High Purity Magnesium
Proceedings of the 10th European Metallurgical Conference (EMC) 2019, June 24-26, Düsseldorf, Germany
Semiramis Friedrich geb. Akbari, Seifeldin Raslan Mohamed, Bernd Friedrich,
2018article in scientific journal
Production of High Purity Metals: A Review on Zone Refining Process
Journal of Crystallization Process and Technology 8 (2018), pp. 33-55 DOI: 10.4236/jcpt.2018.81003
Semiramis Friedrich geb. Akbari, Xiaoxin (Jason) Zhang, Bernd Friedrich,
2017article in scientific journal
Definition of a First Process Window for Purification of Aluminum via “Cooled Finger” Crystallization Technique
Metals, Volume 7 (2017), Issue 341, DOI: doi:10.3390/met7090341
Semiramis Friedrich geb. Akbari, Danilo Curtolo, Bernd Friedrich, Dominic Bellin; Gargi S. Nayak
2017article in scientific journal
High Purity Germanium, a Review on Principle Theories and Technical Production Methodologies
Journal of Crystallization Process and Technology,7 (2017), pp. 65-84
Semiramis Friedrich geb. Akbari, Danilo Curtolo, Bernd Friedrich,
2017congress or congress paper
Investigation of Influencing Parameters on Zone Melting Refining of Aluminum, Part One Impurities: Iron and Silicon
Proceedings of the 9th European Metallurgical Conference (EMC) 2017, June 25-28, Leipzig, Germany
Semiramis Friedrich geb. Akbari, Xiaoxin (Jason) Zhang, Bernd Friedrich,
2017congress or congress paper
Investigation of Temperature Effect on Impurities’ Distribution Coefficient in Molten Aluminum through Theoretical Calculation and Experimental Fractional Crystallization
Proceedings of the 9th European Metallurgical Conference (EMC) 2017, June 25-28, Leipzig, Germany
Semiramis Friedrich geb. Akbari, Danilo Curtolo, Bernd Friedrich,
2017article in scientific journal
Effect of process parameter variation on purity during rotary fractional crystallization of Aluminum
Open Journal of Metal, Vol. 7 (2017), pp. 25-38
Semiramis Friedrich geb. Akbari, Danilo Curtolo, Bernd Friedrich,
2013article in scientific journal
Improving Coalescence in Al-Recycling by Salt Optimization
Erzmetall, Vol. 66 (2013), No. 1, pp. 28-36
Bernd Friedrich, Sandra Besson; Anne Pichat; Elodie Xolin; Patrice Chartrand
2011congress or congress paper
Improving coalescence in Al-Recycling by salt optimization
EMC 2011, European Metallurgical Conference, Düsseldorf, Germany, June 26-29, 2011
Bernd Friedrich, S. Besson; A. Pichat; E. Xolin; P. Chartrand
2011article in scientific journal
Höchste Reinheit für Funktionswerkstoffe - Neue Prozesse ermöglichen Superpurity
RWTH Themen, 1/2011, S. 36-38
Johannes Morscheiser, Bernd Friedrich, W. Bleck; A. Bührig-Polacek
2001article in scientific journal
Behaviour of copper in refining of lead by fractional crystallization
Transaction of the Institut of Mining and Metallurgy, Section C, Mineral Processing and Extraactive Metallurgy 110 (2001), C1-C61, S. C60-C62
Joachim Krüger, K. Qiu; Q. Chen; P. Winkler
2008poster
Applications for the Immersed Filter Centrifuge in Molten Metal and Slag Purification
14th International Metallurgy & Materials Congress IMMC, 16. – 18. Oktober, Istanbul
Charlotte Merkel, Bernd Friedrich,
2008congress or congress paper
Recovery of Magnesium and Salt from Black Dross through Vacuum Destillation
14th International Metallurgy & Materials Congress IMMC, 16. – 18. Oktober, Istanbul, S. 51
Semiramis Friedrich geb. Akbari, Bernd Friedrich, Akbari, S.
2004congress or congress paper
Aluminium Purification.
In: Proceedings of ASEM workshop on EU/ASIA S&T cooperation on clean technologies, 2004, Hanoi, S. 121 - 130.
Georg Rombach, Bernd Friedrich, R. Kieft;T. Bergstrom; P. Le Brun;A. Oygard; A. Pisch; M. Ryckeboer; F. De Schutter; W. Sillekens
2001congress or congress paper
Alternative solution purification in the hydrometallurgical zinc production
In: Proceedings of European Metallurgical Conference, 18. - 21. September 2001, Friedrichshafen, Vol. 1, S. 179 - 197
Joachim Krüger, Graciela Mendez, Bernd Friedrich,

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