Hematite Nanoparticles Addition to Serpentine/Pyroxenes By-Products of Magnesite Mining Enrichment Process for the Production of Refractories
The present study focuses on the refractory upgrade and reuse of the mining wastes/by-products of the magnesite mine “Grecian Magnesite SA” (Chalkidiki, N. Greece), by the addition of hematite (α-Fe<sub>2</sub>O<sub>3</sub>) nanomaterial. These by-products were also examined...
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MDPI AG
2022-02-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/12/4/2094 |
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| author | Kyriaki Kalaitzidou Evangelia Pagona Paraskevas Stratigousis Xanthi Ntampou Vasileios Zaspalis Anastasios Zouboulis Manassis Mitrakas |
| author_facet | Kyriaki Kalaitzidou Evangelia Pagona Paraskevas Stratigousis Xanthi Ntampou Vasileios Zaspalis Anastasios Zouboulis Manassis Mitrakas |
| author_sort | Kyriaki Kalaitzidou |
| collection | DOAJ |
| description | The present study focuses on the refractory upgrade and reuse of the mining wastes/by-products of the magnesite mine “Grecian Magnesite SA” (Chalkidiki, N. Greece), by the addition of hematite (α-Fe<sub>2</sub>O<sub>3</sub>) nanomaterial. These by-products were also examined after the application of thermal pre-treatment, i.e., treated at 850 °C for 30 min, prior to sintering. Different thermal treatments and times were applied, aiming to induce the formation of forsterite and attempting to examine the respective effects on the refractory properties of up-cycled products. The results indicate that hematite addition of 5 wt.% can improve the major refractory parameters of products, whereas the applied thermal pre-treatment was not found to be particularly beneficial. Nevertheless, the optimum results were realized after thermal treatment at 1300 °C for 120 min heating time, also revealing that the initial mineralogical content of the examined mineral wastes is a key factor for the subsequent upgrade ranking of the final product. |
| first_indexed | 2024-03-09T22:41:02Z |
| format | Article |
| id | doaj.art-d56763d2d0524186a0a726a6f5c7a875 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-09T22:41:02Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-d56763d2d0524186a0a726a6f5c7a8752023-11-23T18:39:08ZengMDPI AGApplied Sciences2076-34172022-02-01124209410.3390/app12042094Hematite Nanoparticles Addition to Serpentine/Pyroxenes By-Products of Magnesite Mining Enrichment Process for the Production of RefractoriesKyriaki Kalaitzidou0Evangelia Pagona1Paraskevas Stratigousis2Xanthi Ntampou3Vasileios Zaspalis4Anastasios Zouboulis5Manassis Mitrakas6Department of Chemical Engineering, School of Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, GreeceDepartment of Chemical Engineering, School of Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, GreeceDepartment of Chemical Engineering, School of Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, GreeceDepartment of Chemical Engineering, School of Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, GreeceDepartment of Chemical Engineering, School of Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, GreeceDepartment of Chemistry, School of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, GreeceDepartment of Chemical Engineering, School of Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, GreeceThe present study focuses on the refractory upgrade and reuse of the mining wastes/by-products of the magnesite mine “Grecian Magnesite SA” (Chalkidiki, N. Greece), by the addition of hematite (α-Fe<sub>2</sub>O<sub>3</sub>) nanomaterial. These by-products were also examined after the application of thermal pre-treatment, i.e., treated at 850 °C for 30 min, prior to sintering. Different thermal treatments and times were applied, aiming to induce the formation of forsterite and attempting to examine the respective effects on the refractory properties of up-cycled products. The results indicate that hematite addition of 5 wt.% can improve the major refractory parameters of products, whereas the applied thermal pre-treatment was not found to be particularly beneficial. Nevertheless, the optimum results were realized after thermal treatment at 1300 °C for 120 min heating time, also revealing that the initial mineralogical content of the examined mineral wastes is a key factor for the subsequent upgrade ranking of the final product.https://www.mdpi.com/2076-3417/12/4/2094serpentinized mining wastemagnesite beneficiation by-productsFe<sub>2</sub>O<sub>3</sub> nanoparticles additionthermal pre-treatmentrefractory properties upgrade |
| spellingShingle | Kyriaki Kalaitzidou Evangelia Pagona Paraskevas Stratigousis Xanthi Ntampou Vasileios Zaspalis Anastasios Zouboulis Manassis Mitrakas Hematite Nanoparticles Addition to Serpentine/Pyroxenes By-Products of Magnesite Mining Enrichment Process for the Production of Refractories Applied Sciences serpentinized mining waste magnesite beneficiation by-products Fe<sub>2</sub>O<sub>3</sub> nanoparticles addition thermal pre-treatment refractory properties upgrade |
| title | Hematite Nanoparticles Addition to Serpentine/Pyroxenes By-Products of Magnesite Mining Enrichment Process for the Production of Refractories |
| title_full | Hematite Nanoparticles Addition to Serpentine/Pyroxenes By-Products of Magnesite Mining Enrichment Process for the Production of Refractories |
| title_fullStr | Hematite Nanoparticles Addition to Serpentine/Pyroxenes By-Products of Magnesite Mining Enrichment Process for the Production of Refractories |
| title_full_unstemmed | Hematite Nanoparticles Addition to Serpentine/Pyroxenes By-Products of Magnesite Mining Enrichment Process for the Production of Refractories |
| title_short | Hematite Nanoparticles Addition to Serpentine/Pyroxenes By-Products of Magnesite Mining Enrichment Process for the Production of Refractories |
| title_sort | hematite nanoparticles addition to serpentine pyroxenes by products of magnesite mining enrichment process for the production of refractories |
| topic | serpentinized mining waste magnesite beneficiation by-products Fe<sub>2</sub>O<sub>3</sub> nanoparticles addition thermal pre-treatment refractory properties upgrade |
| url | https://www.mdpi.com/2076-3417/12/4/2094 |
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