Effect of ZnO level in secondary copper smelting slags on slag/magnesia-chromite refractory interactions

Chen, Liugang; Guo, Muxing; Shi, Huayue; Huang, Shuigen; Jones, Peter Tom; Blanpain, Bart; Malfliet, Annelies

doi:10.1016/j.jeurceramsoc.2016.02.004

Cited by 33 publications

(17 citation statements)

References 11 publications

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“…It was demonstrated that compared with that prepared without addition of chromium oxide, the refractory material obtained by sintering at 1350°C for 3 hours in the presence of 6 wt% chromium oxide possessed a much higher refractoriness (difference of 180°C). All the chromium components in the system were stabilized as trivalent chromium in the chromate spinel phases, contributing to great refractory materials having strong corrosion resistance and thermal shock resistance, and thus wide potential applications in smelting furnaces . In the preparation, the phase transition and microstructural evolution were believed to affect the properties of the refractory materials significantly .…”

Section: Introductionmentioning

confidence: 99%

Promoting spinel formation and growth for preparation of refractory materials from ferronickel slag

Peng

Zhang

et al. 2020

Int J Applied Ceramic Tech

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The study provides a method for improving the quality of the refractory material prepared from ferronickel slag by promoting the spinel formation and growth in the slag which was sintered with sintered magnesia and chromium oxide in a broad sintering temperature range from 1200°C to 1500°C. According to the thermodynamic analysis, except for forsterite due to the addition of sintered magnesia, a number of high‐melting point spinel phases can also be formed in the presence of chromium oxide and this trend becomes more apparent with increasing sintering temperature, along with declined presence of low‐melting point clinopyroxene, mainly enstatite. This expectation was verified by conversion of a part of the original phase of ferronickel slag, olivine, to two main spinel phases, including magnesium aluminate spinel and donathite which was produced by the replacement of nontoxic Cr3+ ions with Fe3+ ions in the octahedral vacancies of magnesium chromate spinel. The formation and growth of these spinel phases were promoted by elevating temperature from 1200°C to 1500°C, which accelerated the transition of initially generated enstatite to a glassy phase, in favor of densification. The formation and growth of spinel during sintering contributed to high refractoriness and compressive strength of the resulting refractory materials

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Section: Introductionmentioning

confidence: 99%

Promoting spinel formation and growth for preparation of refractory materials from ferronickel slag

Peng

Zhang

et al. 2020

Int J Applied Ceramic Tech

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“…1,2 Because the presence of ZnO can change the physical and chemical properties of the copper smelting slag, the corrosion behavior of the furnace lining, which typically consists of magnesia-chromite refractories, can be influenced. 3 ZnO along with FeO and SiO 2 react with periclase forming a (Fe,Mg, Zn) 2 SiO 4 olivine and a (Fe,Mg,Zn)O solid solution. 2,3 It was found that periclase in magnesia-chromite refractories is dominantly corroded by ZFS slags because of the MgO dissolution into the slags.…”

Section: Introductionmentioning

confidence: 99%

“…The authors already showed the effect of ZnO in fayalite slags on the degradation of magnesia-chromite refractories. 2,3 It was found that periclase in magnesia-chromite refractories is dominantly corroded by ZFS slags because of the MgO dissolution into the slags. The MgO solubility in the slags continuously decreases with the ZnO content for a constant FeO/SiO 2 ratio of 1.4.…”

Section: Introductionmentioning

confidence: 99%

“…The MgO solubility in the slags continuously decreases with the ZnO content for a constant FeO/SiO 2 ratio of 1.4. 3 ZnO along with FeO and SiO 2 react with periclase forming a (Fe,Mg, Zn) 2 SiO 4 olivine and a (Fe,Mg,Zn)O solid solution. In comparison, chromite grains in the refractories react little with the slags.…”

Section: Introductionmentioning

confidence: 99%

“…In comparison, chromite grains in the refractories react little with the slags. 2,3 Besides ZnO, the level of FeO and CaO also influences the properties of such fayalite-based slags. For example, in order to meet the operation requirements during copper smelting, e.g., minimizing the Cu loss and extracting minor elements from copper, 4,5 the Fe x O/SiO 2 or CaO/SiO 2 ratio of fayalite-based slags need to be adjusted.…”

Section: Introductionmentioning

confidence: 99%

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Influence of FeO/SiO₂ and CaO/SiO₂ Ratios in Iron‐Saturated ZnO‐Rich Fayalite Slags on the Corrosion of MgO

et al. 2016

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The corrosion behavior of MgO in iron‐saturated ZnO‐rich fayalite (ZFS) slags having various FeO/SiO2 ratio and CaO/SiO2 ratio was investigated using MgO crucible tests for 12 h at 1200°C. The FeO/SiO2 and CaO/SiO2 ratios in the ZFS slags were varied from 1.0 to 2.2, and from 0.04 to 0.32, respectively. In all of the tests, it was observed that MgO dissolves into ZFS slags and that (Zn,Fe,Mg)2SiO4 olivine and (Zn,Fe,Mg)O solid solution are formed at the crucible/slag interface. The MgO dissolution decreased with the FeO/SiO2 ratio up to a value of 1.7 and then slightly increased, whereas it continuously increased with the CaO/SiO2 ratio. There is no obvious relationship between the amount of olivine and the FeO/SiO2 ratio or CaO/SiO2 ratio. In comparison, the formation of (Zn,Fe,Mg)O solid solution is enhanced by increasing the FeO/SiO2 ratio or CaO/SiO2 ratio in ZFS slags. The results suggest that MgO corrosion is the lowest for FeO/SiO2 and CaO/SiO2 ratios around 1.7 and 0, respectively.

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Melting and Solidification Behaviors of the Copper Slags with Different CaO Content at Various Oxygen Partial Pressures

Wang

Huang

Blanpain

et al. 2023

The Minerals, Metals &Amp; Materials Series

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Effect of ZnO level in secondary copper smelting slags on slag/magnesia-chromite refractory interactions

Cited by 33 publications

References 11 publications

Promoting spinel formation and growth for preparation of refractory materials from ferronickel slag

Promoting spinel formation and growth for preparation of refractory materials from ferronickel slag

Influence of FeO/SiO₂ and CaO/SiO₂ Ratios in Iron‐Saturated ZnO‐Rich Fayalite Slags on the Corrosion of MgO

Melting and Solidification Behaviors of the Copper Slags with Different CaO Content at Various Oxygen Partial Pressures

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Effect of ZnO level in secondary copper smelting slags on slag/magnesia-chromite refractory interactions

Cited by 33 publications

References 11 publications

Promoting spinel formation and growth for preparation of refractory materials from ferronickel slag

Promoting spinel formation and growth for preparation of refractory materials from ferronickel slag

Influence of FeO/SiO2 and CaO/SiO2 Ratios in Iron‐Saturated ZnO‐Rich Fayalite Slags on the Corrosion of MgO

Melting and Solidification Behaviors of the Copper Slags with Different CaO Content at Various Oxygen Partial Pressures

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Influence of FeO/SiO₂ and CaO/SiO₂ Ratios in Iron‐Saturated ZnO‐Rich Fayalite Slags on the Corrosion of MgO