Effect of Base Types on the Properties of MgO Particles Obtained from Dolomite Ore
| Autor: | Mahmut Altiner |
|---|---|
| Přispěvatelé: | Çukurova Üniversitesi |
| Rok vydání: | 2019 |
| Předmět: |
Materials science
Scanning electron microscope Characterization 0211 other engineering and technologies MgO chemistry.chemical_element Precipitation 02 engineering and technology engineering.material Different bases law.invention law Specific surface area Materials Chemistry Surface roughness Calcination 021102 mining & metallurgy Precipitation (chemistry) Magnesium Mechanical Engineering Metals and Alloys General Chemistry Dolomite Geotechnical Engineering and Engineering Geology chemistry Chemical engineering Control and Systems Engineering engineering Leaching (metallurgy) Periclase |
| Zdroj: | Mining, Metallurgy & Exploration. 36:1013-1020 |
| ISSN: | 2524-3470 2524-3462 |
| DOI: | 10.1007/s42461-019-00122-7 |
| Popis: | This study aimed to produce magnesium oxide (MgO) particles with different properties from dolomite ore using an experimental procedure comprising four stages: sample preparation (S1), HCl leaching (S2), precipitation (S3), and calcination (S4). Three different base sources (NaOH, KOH, and NH4OH) were used as precipitant in the third stage to obtain magnesium hydroxide [Mg(OH)2] from a leachate solution, which was obtained in the second stage. Next, Mg(OH)2 particles generated by different alkali sources were calcined at various temperatures from 600–1000 °C for different durations (1–5 h). The effect of these base types on the properties of each product was investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET), atomic force microscopy (AFM), and wet chemical analyses. The experimental results indicated that each product was identified as periclase (MgO) mineral, which was produced with a specific surface area (SSA) of 4.49–44.54 m2/g depending on the production conditions. The surface roughness of the MgO particles increased with increasing calcination temperature. SEM analyses showed that MgO particles produced at a temperature of 600 or 800 °C were amorphous, indicating that the process was not influenced by the base type, but MgO crystals were smooth when the calcination temperature was 1000 °C. Finally, it was determined from all experimental findings that MgO particles produced via the addition of NaOH have superior properties (such as higher SSA and lower surface roughness) compared with MgO particles produced with KOH or NH4OH as the alkali source. These properties led to great improvement of its usability in industry. © 2019, Society for Mining, Metallurgy & Exploration Inc. FBA-2019-10123 This study was supported by Cukurova University (project no: FBA-2019-10123). The author would like to thank the anonymous reviewers for their valuable comments. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full text from SpringerLink