Volume 71 Issue 11
Effect of base types on the properties of MgO particles obtained from dolomite ore
Magnesium is listed as a key critical raw material in a report by the European Commission that evaluated raw materials based on supply risk versus economic importance . It has extraordinary properties, such as nontoxicity, inertness, high melting point, stability, low weight, chemical resistance, electrical insulation, optical transparency, corrosion-resistant behavior and refractory nature. It is widely used in the areas of agriculture; the environment, for antibacterial and water-purification purposes; electronics; automotive; drug delivery; ceramics; construction, as filler in brick; and concrete production, in the forms of magnesium oxychloride and magnesium oxysulfate. Magnesium oxide (MgO) particles can be produced through the calcination of magnesite ore at different calcination conditions depending on the desired quality of the product, classified as fused (2,800 °C), dead-burned (>1,400 °C), hard-burned (1,000–1,400 °C), or light-burned MgO (700–1,000 °C) . However, the global availability of magnesite ore is limited.
Previous studies investigated new alternative sources, including seawater, natural brine, desalination reject water, dolomite and serpentine, for the production of magnesium hydroxide (Mg(OH)2) or MgO particles with desired properties. The aim of the present study was to produce MgO particles from dolomite ore (CaMg(CO3)2). In addition, the effect of base types on the properties of each product was investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) and atomic force microscopy (AFM) analyses.
Mining, Metallurgy & Exploration, https://doi.org/10.1007/s42461-019-00122-7
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