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.

基于热力学评估和通过²⁷ Al 500-MHz固相铝对Al离子配位数的结构分析，研究了碱度和阴离子种类对Ni在CaO-MgO-Al ₂ O ₃ -SiO ₂炉渣中的溶解度的影响。状态核磁共振波谱。根据炉渣的碱度，Ni的溶出遵循两种机理，其中包括Ni ²⁺和NiO ₂ ^2-作为离子种类。发现溶解度-碱度图是最小的凹向上曲线。结构研究表明，Ni的溶解度随Al ₂ O _3的增加而降低AlO ₄ ⁵⁻和NiO ₂ ^2-离子之间的排斥力随之增加而导致含量降低。根据炉渣的结构分析结果和热力学评价结果，讨论了Al ₂ O ₃和SiO ₂衍生的阴离子种类对Ni溶解度的影响。