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

Joon Sung Choi, Tae Jun Park, Dong Joon Min

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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.

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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