Synthesis of high purity magnesia MgO from Algerian dolomite ore-Reference-Cited by-同舟云学术

Synthesis of high purity magnesia MgO from Algerian dolomite ore

Published:2023 Issue:1 Volume:59 Page:53-64
ISSN:1450-5339
Container-title:Journal of Mining and Metallurgy, Section B: Metallurgy
language:en
Short-container-title:J min metall B Metall

Author:

Bouchekrit C.¹,Kolli M.¹,Altiner M.²,Doufnoune R.³

Affiliation:

1. Ferhat Abbas Setif 1 University, Emergent Materials Research Unit, Setif, Algeria + Ferhat Abbas Setif 1 University, Optics and Precision Mechanics Institute, Setif, Algeria

2. Çukurova University, Mining Engineering Department, Adana, Turkey

3. Ferhat Abbas Setif 1 University, Emergent Materials Research Unit, Setif, Algeria + Ferhat Abbas Setif 1 University, Faculty of Technology, Setif, Algeria

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. Furthermore, 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 SSA (70.42 m2/g) which may be of interest for some applications, such as catalysts or supports.

Publisher

National Library of Serbia

Subject

Materials Chemistry,Metals and Alloys,Mechanics of Materials,Geotechnical Engineering and Engineering Geology

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