Hematite Nanoparticles Addition to Serpentine/Pyroxenes By-Products of Magnesite Mining Enrichment Process for the Production of Refractories

Applied Sciences

Kyriaki Kalaitzidou¹  Vasileios Zaspalis¹  Paraskevas Stratigousis¹  Xanthi Ntampou¹  Manassis Mitrakas¹  Evangelia Pagona¹  Anastasios Zouboulis² 

[1] Department of Chemical Engineering, School of Engineering, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;Department of Chemistry, School of Sciences, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece;

关键词: serpentinized mining waste;    magnesite beneficiation by-products;    Fe₂O₃ nanoparticles addition;    thermal pre-treatment;    refractory properties upgrade;   

DOI  :  10.3390/app12042094

来源: DOAJ

【 摘 要 】

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-Fe₂O₃) 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.

【 授权许可】

Unknown