Reduction conditions of metallic calcium from magnesium production residues

Kerem Can Taşyürek*, Mehmet Buğdaycı, Onuralp Yücel

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


In this paper, the theoretical and industrial definitions of metallic calcium production by the metallothermic process in a vacuum atmosphere were investigated. In the experiments, Al is the only reductant used for metallothermic calcium production. The effects of Al stoichiometry, time variances, and temperature changes were investigated. The experiments were carried out at 1200 °C, 1250 °C, and 1300 °C, and with 100% Al, 125% Al, and 150% Al stoichiometry to produce metallic calcium from the residue of metallic magnesium production. Both the raw materials and the residue phases were characterized by atomic absorption spectrometry (AAS), X-ray diffraction (XRD) spectrometry, and chemical analysis techniques. Experimental results were investigated to determine the highest efficiency of reduction conditions. From the results of the experiments, reaction kinetics and activation energy were calculated. According to the experimental results, the highest recovery rate parameters for the reduction of calcium are 150% stoichiometric Al for 480 min at 1300 °C, with 72% recovery.

Original languageEnglish
Article number383
Issue number6
Publication statusPublished - 25 May 2018

Bibliographical note

Publisher Copyright:
© 2018 by the authors. Licensee MDPI, Basel, Switzerland.


Acknowledgments: The authors gratefully acknowledge the Istanbul Technical University BAP department, which made this research possible (ITU BAP Project ID: 40654).

FundersFunder number
ITU BAP40654
Istanbul Technical University BAP Department


    • Aluminothermic process
    • Aluminum
    • Calcium
    • Magnesium
    • Pidgeon process


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