Identification of magnesia–chromite refractory degradation mechanisms of secondary copper smelter linings

Chen, Liugang; Li, Shuangliang; Jones, Peter Tom; Guo, Muxing; Blanpain, Bart; Malfliet, Annelies

doi:10.1016/j.jeurceramsoc.2016.02.036

Cited by 46 publications

(16 citation statements)

References 11 publications

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“…Once the thickness and strength of the remaining refractory sagger have become critical for a safe operation during calcination, a costly replacement of the refractory sagger is deemed necessary. The results also indicate that likewise other applications of refractories, a combination of mechanical, thermal, and chemical stresses leads to the degradation of refractory saggers in the LNCM materials calcination, and the chemical corrosion of the refractory material is typically the most severe. To enhance the performance and thus to improve the life time of refractory saggers, the most clear‐cut way is through the use of new refractory types that better withstand the combination of mechanical, thermal, and chemical stresses, especially the chemical corrosion.…”

Section: Introductionmentioning

confidence: 73%

Comparison of interactions of MgO‐based refractories with Li‐ion battery cathode materials during calcination

Zhai

Chen

et al. 2018

Int J Applied Ceramic Tech

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To select refractory major ingredients of saggers for the calcination of Li‐ion battery cathode Li(NixCoyMnz)O2 (LNCM) materials, interactions between MgO‐based refractories, ie, magnesium aluminate (MgAl2O4) spinel, forsterite (2MgO·SiO2), and cordierite (2MgO·2Al2O3·5SiO2), and LNCM materials were compared respectively via refractory‐LNCM precursor cylinder testing in lab‐scale. The phase composition and microstructure evolution of the calcined cylinders were characterized and resulted in comprehensive understanding and comparing of degradation of the MgO‐based refractories. The results reveal that cordierite is severely corroded, whereas magnesium‐aluminate spinel reacts little with LNCM materials. Refractories contain both SiO2 and Al2O3 with a higher SiO2 level will suffer a more serious corrosion contacting with LNCM materials.

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Section: Introductionmentioning

confidence: 73%

Comparison of interactions of MgO‐based refractories with Li‐ion battery cathode materials during calcination

Zhai

Chen

et al. 2018

Int J Applied Ceramic Tech

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“…1 shows the experimental apparatus for the static refractory finger corrosion tests. The details for the experimental set-up have been previously reported [15]. Molybdenum wires were used due to the high testing temperature.…”

Section: Experimental Set-up and Proceduresmentioning

confidence: 99%

Influence of Al2O3 Level in CaO-SiO2-MgO-Al2O3 Refining Slags on Slag/Magnesia-Doloma Refractory Interactions

Chen

Malfliet

Jones

et al. 2019

Metall Mater Trans B

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The influence of the Al2O3 level in CaO-SiO2-MgO-Al2O3 (CSMA) stainless steel refining slags on the degradation of magnesia-doloma refractories was investigated through static refractory finger corrosion tests. The tests were performed at 1620 °C under Ar atmosphere, using slags with Al2O3 contents of 5 wt%, 10 wt% and 20 wt%, respectively. The results indicate that the formation of 2CaO•SiO2 at the slag/refractory interface was suppressed by increasing the Al2O3 content to 20 wt%, thereby changing the corrosion mechanism from an indirect dissolution to a direct dissolution of CaO and MgO from the refractories. The increased solubility limit of MgO by the Al2O3-rich CSMA slags results in an overall higher corrosion rate of the MgO-doloma refractory.

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“…Melted Cu does not wet the ceramics; thus, it slightly affects the lifetime of the refractory. However, Cu slag is one of the most aggressive corrosive mediums towards refractories [2]. All factorsmechanical, thermal, and chemical stresses-exist simultaneously during pyrometallurgical Cu production [3][4][5], which intensifies the degradation of the refractory.…”

Section: Introductionmentioning

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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Identification of magnesia–chromite refractory degradation mechanisms of secondary copper smelter linings

Cited by 46 publications

References 11 publications

Comparison of interactions of MgO‐based refractories with Li‐ion battery cathode materials during calcination

Comparison of interactions of MgO‐based refractories with Li‐ion battery cathode materials during calcination

Influence of Al2O3 Level in CaO-SiO2-MgO-Al2O3 Refining Slags on Slag/Magnesia-Doloma Refractory Interactions

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

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