Research and Development of Novel Refractory of MgO Doped with ZrO2 Nanoparticles for Copper Slag Resistance

Gómez-Rodríguez, Cristian; Antonio-Zárate, Yanet; Revuelta-Acosta, Josept David; González, Luis Felipe Verdeja; González, Daniel Fernández; López-Perales, J.F.; Rodríguez-Castellanos, Edén Amaral; García-Quiñonez, Linda Viviana; Castillo-Rodríguez, Guadalupe Alan

doi:10.3390/ma14092277

Cited by 15 publications

(5 citation statements)

References 37 publications

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“…It can be assumed that the submicron dimensions of the grains seen in Figure 9 and Figure 11 contributed to the improvement of the composite characteristics. As indicated by other studies, nanometric particles of materials, including Cr 2 O 3 , usually provide physical and mechanical properties superior to those of conventional particles [ 41 ].…”

Section: Resultsmentioning

confidence: 99%

Activated Sintering of Cr2O3-Based Composites by Hot Pressing

et al. 2022

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The paper presents and discusses questions on structure formation during the sintering process of Cr2O3-based composites using the hot pressing method, when a chemical reaction between the components takes place. The task was difficult because Cr2O3 decomposes when sintered at temperatures above 1300 °C. The proposed novel method allowed for interaction between aluminum and chromia, thus avoiding the decomposition of the latter. Here, ultrafine aluminum powder played the role of the active agent forming a liquid phase and reacting with Cr2O3. The appearance of the solid solutions of (Cr,Al)2O3 with different stoichiometry of Cr and Al depended on the aluminum content in the initial mixture. The solid solution significantly strengthened boundaries between composite phases, resulting in the composite material of high fracture toughness between 5 and 7 MPa m½ and bending strength of ca. 500 MPa. The best mechanical properties exhibited the cermet with 22 wt.% of the restored chromium.

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Section: Resultsmentioning

confidence: 99%

Activated Sintering of Cr2O3-Based Composites by Hot Pressing

et al. 2022

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“…Consistently, magnesia-chromite refractories exhibited the best performance. Cr-free solutions for the Cu industry are continuously under investigation, e.g., refractories from the system MgO-Al 2 O 3 -SnO 2 [33,34], Si 3 N 4 -SiC [35], or MgO doped with ZrO 2 nanoparticles [36]. The resistance of MgO to liquid CuO x was examined in [37].…”

Section: Oxidementioning

confidence: 99%

Corrosion Resistance of MgO and Cr2O3-Based Refractory Raw Materials to PbO-Rich Cu Slag Determined by Hot-Stage Microscopy and Pellet Corrosion Test

et al. 2022

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Chemical resistance of commercial refractory raw materials against Cu slag is critical to consider them as candidates for the production of refractories used in Cu metallurgy. In this study, we show the comparative results for the corrosion resistance of four commercial refractory raw materials—magnesia chromite co-clinkers FMC 45 and FMC 57, PAK, and fused spinel SP AM 70—against aggressive, low-melting PbO-rich Cu slag (Z1) determined by hot-stage microscopy (up to 1450 °C) and pellet test (1100 and 1400 °C). Samples were characterized after the pellet test by XRD, SEM/EDS, and examination of their physicochemical properties to explore the corrosion reactions and then assess comparatively their chemical resistance. Since many works have focused on corrosion resistance of refractory products, the individual refractory raw materials have not been investigated so far. In this work, we show that magnesia chromite co-clinker FMC 45 exhibits the most beneficial properties considering its application in the production of refractories for the Cu industry. Forsterite (Mg2SiO4) and güggenite (Cu2MgO3) solid solutions constitute corrosion products in FMC 45, and its mixture with slag shows moderate dimensional stability at high temperatures. On the other hand, the fused spinel SP AM 70 is the least resistant to PbO-rich Cu slag (Z1); it starts to sinter at 970 °C, followed by a fast 8%-shrinkage caused by the formation of güggenite solid solution in significant amounts.

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“…[15][16][17][18][19] In addition, the viscosity of sulfide-containing matte slag is significantly lower compared to other slags, causing serious infiltration into the refractories. Although studies have shown that the addition of spinel, 20 aggregates, 21 rare earth oxides (Y 2 O 3 ), 22 Si 3 N 4 , 23 and ZrO 2 nanoparticles 24 can significantly improve the oxidation resistance and slag corrosion resistance, the high cost of these additives deters metallurgical enterprises to procure those lining materials on a long term.…”

Section: Introductionmentioning

confidence: 99%

Improved oxidation resistance while maintaining slag corrosion resistance of MgO–SiC–C refractories with moderate amounts of liquid phase

Guo,

Zhao,

Zhu

et al. 2024

Int J Applied Ceramic Tech

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MgO–SiC–C refractories with superior hot strength, oxidation resistance and slag resistance have potential to become substitute refractories for matte smelting furnace. In the present work, the influence of glass powder addition on phase compositions, hot strength, oxidation resistance, and slag resistance of MgO–SiC–C refractories was investigated. The liquid phase introduced by glass powder filled the pores, blocking the channel for the ingress of the oxygen and thus improving the oxidation resistance. Although the oxidation resistance of such refractories was improved with 1–3 wt% glass powder addition, their hot strength and slag corrosion resistance decreased when the glass powder content was 2–3 wt%. To balance the mechanical properties, oxidation resistance and slag resistance, low amount glass powder addition (1 wt%) was considered better choice.

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Research and Development of Novel Refractory of MgO Doped with ZrO2 Nanoparticles for Copper Slag Resistance

Cited by 15 publications

References 37 publications

Activated Sintering of Cr2O3-Based Composites by Hot Pressing

Activated Sintering of Cr2O3-Based Composites by Hot Pressing

Corrosion Resistance of MgO and Cr2O3-Based Refractory Raw Materials to PbO-Rich Cu Slag Determined by Hot-Stage Microscopy and Pellet Corrosion Test

Improved oxidation resistance while maintaining slag corrosion resistance of MgO–SiC–C refractories with moderate amounts of liquid phase

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