Variation of viscosity and crystallization properties of synthetic ferronickel waste slag with Al2O3 content

Zhang, Tongsheng; Zhang, Hualong; Dai, Shifan; Huang, Daoyuan; Wang, Wanlin

doi:10.1016/j.ceramint.2021.05.005

Cited by 13 publications

(2 citation statements)

References 10 publications

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“…Accordingly, it can be seen that the above papers have only studied the crystallization process of molten slag, but the effect of crystallization on viscosity has not been studied. Zhang et al [22] studied the effect of Al 2 O 3 on viscosity and the crystallization properties of Fe-Ni alloy slag by CLSM and characterized the morphology and composition of the crystallization phase. Wang et al [15] focused on the effect of CaO on crystallization properties and viscosity of silicomanganese slag during fiber formation.…”

Section: Introductionmentioning

confidence: 99%

The Effect of Acidity Coefficient on the Crystallization Properties and Viscosity of Modified Blast Furnace Slag for Mineral Wool Production

et al. 2022

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The crystallization and viscosity of modified blast furnace slag are key factors in fiber forming conditions. In this paper, the crystallization behavior of modified blast furnace slag under continuous cooling conditions was studied by differential scanning calorimetry, and its crystallization kinetics with different acidity coefficients were established. On this basis, the evolution law of the crystallization phase and the influence of crystallization on the viscosity of modified blast furnace slag with different acidity coefficients were analyzed. The results indicated that the crystallization phases of slag with acidity coefficients of 1.05 and 1.20 were, respectively, Melilite and Anorthite. During the cooling process at the acidity coefficient of 1.05, the critical rates of precipitation of Melilite and Anorthite were 50 °C/s and 20 °C/s, respectively, while they were 20 °C/s and 15 °C/s, respectively, at the acidity coefficient of 1.20. With the increase of the acidity coefficient, the crystal growth mode of slag changed from two-dimensional and three-dimensional mixed crystallization to surface nucleation and one-dimensional crystallization. The crystallization activation energy of slag with acidity coefficients of 1.05 and 1.20 were 698.14 kJ/mol and 1292.50 kJ/mol, respectively. In addition, the change trend of viscosity was related to crystal size and content.

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Section: Introductionmentioning

confidence: 99%

The Effect of Acidity Coefficient on the Crystallization Properties and Viscosity of Modified Blast Furnace Slag for Mineral Wool Production

et al. 2022

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“…Furthermore, the high-alumina slag is used to recover platinum group metals (PGMs) from alumina-based spent catalysts with metals collection methods [16][17][18]. Moreover, a tremendous amount of slag with high Al 2 O 3 is produced during the ferronickel alloy and ferrochromium alloy production process [19][20][21]. As we know, the fluidity property of slag has a considerable influence on the smelting process and separation of metals from slag [22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Effects of Basicity and Al2O3 Content on Viscosity and Crystallization Behavior of Super-High-Alumina Slag

et al. 2022

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The CaO-SiO2-MgO-Al2O3 slags with high alumina content are widely applied in various pyrometallurgical processes. However, for super-high-alumina slags, especially for those with alumina content of more than 25 wt%, there is a lack of relevant studies about the properties of slag. The melting behavior, viscosity, structural property, and crystallization behavior of high-alumina slag with the fixed MgO content of 11.13 wt% and Al2O3 content from 27.61 wt% to 40 wt% were investigated. The results revealed that the liquidus temperatures and complete solidification temperatures of slag increased with the increasing binary basicity and Al2O3 content. The melting temperature and viscosity of the CaO-SiO2-11.13wt%MgO-Al2O3 slag system increased with the increasing basicity from 0.8 to 1 and Al2O3 content from 27.61 wt% to 40 wt%. The increase in Al2O3 caused the formation of high-crystallinity and high melting point materials in the slag, such as spinel and Åkermanite. A large number of non-uniform phases could quickly crystallize out of the solids present in the slag melt, thereby increasing the slag viscosity and deteriorating the fluidity of the slag.

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Effect mechanism of steel slag on CO2 capture in hydraulic lime

Luo

Peng

et al. 2023

Environ Sci Pollut Res

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Variation of viscosity and crystallization properties of synthetic ferronickel waste slag with Al2O3 content

Cited by 13 publications

References 10 publications

The Effect of Acidity Coefficient on the Crystallization Properties and Viscosity of Modified Blast Furnace Slag for Mineral Wool Production

The Effect of Acidity Coefficient on the Crystallization Properties and Viscosity of Modified Blast Furnace Slag for Mineral Wool Production

Effects of Basicity and Al2O3 Content on Viscosity and Crystallization Behavior of Super-High-Alumina Slag

Effect mechanism of steel slag on CO2 capture in hydraulic lime

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