Effect of Ionic Structure on Dissolution Behavior of Nickel in Aluminosilicate Slags

Joon Sung Choi; Tae Jun Park; Dong Joon Min

doi:10.1007/s11663-021-02096-8

Effect of Ionic Structure on Dissolution Behavior of Nickel in Aluminosilicate Slags

Joon Sung Choi, Tae Jun Park, Dong Joon Min

Department of Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

The effects of basicity and anionic species on the solubility of Ni in CaO-MgO-Al₂O₃-SiO₂ slags were investigated based on the thermodynamic evaluation and structural analysis of the coordination number of Al ions via ²⁷Al 500-MHz solid-state nuclear magnetic resonance spectroscopy. Depending on slag basicity, Ni dissolution followed two mechanisms, involving Ni²⁺ and NiO₂²⁻ as ionic species. The solubility–basicity plot was found to be a concave upward curve with a minimum value. Structural investigation indicated that Ni solubility decreased with increasing Al₂O₃ content owing to the concomitant increase in the repulsion between AlO₄⁵⁻ and NiO₂²⁻ ions. The effects of Al₂O₃- and SiO₂-derived anionic species on Ni solubility were also discussed based on the results of the structural analysis of slag and thermodynamic evaluation.

Original language	English
Pages (from-to)	1333-1343
Number of pages	11
Journal	Metallurgical and Materials Transactions B: Process Metallurgy and Materials Processing Science
Volume	52
Issue number	3
DOIs	https://doi.org/10.1007/s11663-021-02096-8
Publication status	Published - 2021 Jun

Bibliographical note

Publisher Copyright:
© 2021, The Minerals, Metals & Materials Society and ASM International.

All Science Journal Classification (ASJC) codes

Condensed Matter Physics
Mechanics of Materials
Metals and Alloys
Materials Chemistry

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Cite this

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title = "Effect of Ionic Structure on Dissolution Behavior of Nickel in Aluminosilicate Slags",

abstract = "The effects of basicity and anionic species on the solubility of Ni in CaO-MgO-Al2O3-SiO2 slags were investigated based on the thermodynamic evaluation and structural analysis of the coordination number of Al ions via 27Al 500-MHz solid-state nuclear magnetic resonance spectroscopy. Depending on slag basicity, Ni dissolution followed two mechanisms, involving Ni2+ and NiO22− as ionic species. The solubility–basicity plot was found to be a concave upward curve with a minimum value. Structural investigation indicated that Ni solubility decreased with increasing Al2O3 content owing to the concomitant increase in the repulsion between AlO45− and NiO22− ions. The effects of Al2O3- and SiO2-derived anionic species on Ni solubility were also discussed based on the results of the structural analysis of slag and thermodynamic evaluation.",

author = "Choi, {Joon Sung} and Park, {Tae Jun} and Min, {Dong Joon}",

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AU - Choi, Joon Sung

AU - Park, Tae Jun

AU - Min, Dong Joon

PY - 2021/6

Y1 - 2021/6

N2 - The effects of basicity and anionic species on the solubility of Ni in CaO-MgO-Al2O3-SiO2 slags were investigated based on the thermodynamic evaluation and structural analysis of the coordination number of Al ions via 27Al 500-MHz solid-state nuclear magnetic resonance spectroscopy. Depending on slag basicity, Ni dissolution followed two mechanisms, involving Ni2+ and NiO22− as ionic species. The solubility–basicity plot was found to be a concave upward curve with a minimum value. Structural investigation indicated that Ni solubility decreased with increasing Al2O3 content owing to the concomitant increase in the repulsion between AlO45− and NiO22− ions. The effects of Al2O3- and SiO2-derived anionic species on Ni solubility were also discussed based on the results of the structural analysis of slag and thermodynamic evaluation.

AB - The effects of basicity and anionic species on the solubility of Ni in CaO-MgO-Al2O3-SiO2 slags were investigated based on the thermodynamic evaluation and structural analysis of the coordination number of Al ions via 27Al 500-MHz solid-state nuclear magnetic resonance spectroscopy. Depending on slag basicity, Ni dissolution followed two mechanisms, involving Ni2+ and NiO22− as ionic species. The solubility–basicity plot was found to be a concave upward curve with a minimum value. Structural investigation indicated that Ni solubility decreased with increasing Al2O3 content owing to the concomitant increase in the repulsion between AlO45− and NiO22− ions. The effects of Al2O3- and SiO2-derived anionic species on Ni solubility were also discussed based on the results of the structural analysis of slag and thermodynamic evaluation.

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Effect of Ionic Structure on Dissolution Behavior of Nickel in Aluminosilicate Slags

Abstract

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