Synthesis of high purity magnesia MgO from Algerian dolomite ore

  • Bouchekrit Chafia Ferhat Abbas Setif 1 University, Emergent Materials Research Unit, Setif, Algeria
  • KOLLI Mostafa Emergent Materials Research Unit, Ferhat Abbas Setif 1 University, Setif, Algeria
  • Altiner Mahmut Çukurova University, Mining Engineering Department, Adana, Turkey
  • Doufnoune Rachida Ferhat Abbas Setif 1 University, Emergent Materials Research Unit, Setif, Algeria
Keywords: Dolomite, Acid leaching, Precipitation, Mg(OH)2, MgO, Calcination

Abstract


A nanometric Mg(OH)2 and MgO particles with high purity were successfully synthesized from Algerian dolomite via a leaching-precipitation-calcination process. The effect of leaching parameters such as H2SO4 acid concentration (C), temperature (T), time (t), solid/liquid ratio (S/L), and precipitation parameters: type of precipitating base (KOH, NaOH, NH4OH), OH-/Mg2+ ratio, and temperature on the obtained product properties were investigated using Taguchi approach. The optimal leaching conditions were selected as: C=5M, T=65 °C, t=15 min, and S/L ratio=1:5. Whereas, the potassium hydroxide (KOH) was selected as the optimal precipitating base with OH-/Mg2+ = 10.5. The calcination of the precipitates at 800 °C during 2 h made it possible to produce a high purity MgO (~99.45 %) with a crystallite size of approximately 16.5 nm and particles in the form of agglomerated porous plates with a high SAA (70.42 m2/g) which may be of interest for some applications such as catalysts or supports.

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Published
2023/08/15
How to Cite
Chafia, B., Mostafa, K., Mahmut, A., & Rachida, D. (2023). Synthesis of high purity magnesia MgO from Algerian dolomite ore. Journal of Mining and Metallurgy, Section B: Metallurgy, 59(1), 53-64. Retrieved from https://aseestant.ceon.rs/index.php/jmm/article/view/37304
Issue
Vol. 59 No. 1 (2023)
Section
Original Scientific Paper

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