1623 K时SiO2饱和的MnO–SiO2渣和Al2O3饱和的MnO–SiO2–Al2O3渣中NiO的活度系数

任国兴; 肖松文; 廖财斌; 刘志宏

doi:10.1007/s12613-020-2205-y

Volume 29 Issue 2

Feb. 2022

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文章导航 > 矿物冶金与材料学报（英文） > 2022 > 29(2): 248-255

Guoxing Ren, Songwen Xiao, Caibin Liao, and Zhihong Liu, Activity coefficient of NiO in SiO₂-saturated MnO–SiO₂ slag and Al₂O₃-saturated MnO–SiO₂–Al₂O₃ slag at 1623 K, Int. J. Miner. Metall. Mater., 29(2022), No. 2, pp. 248-255. https://doi.org/10.1007/s12613-020-2205-y

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Guoxing Ren, Songwen Xiao, Caibin Liao, and Zhihong Liu, Activity coefficient of NiO in SiO2-saturated MnO–SiO2 slag and Al2O3-saturated MnO–SiO2–Al2O3 slag at 1623 K, Int. J. Miner. Metall. Mater., 29(2022), No. 2, pp. 248-255. https://doi.org/10.1007/s12613-020-2205-y

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研究论文

1623 K时SiO₂饱和的MnO–SiO₂渣和Al₂O₃饱和的MnO–SiO₂–Al₂O₃渣中NiO的活度系数

1)
中南大学冶金与环境学院，长沙 410083，中国
2)
长沙矿冶研究院有限责任公司，长沙 410012，中国

通讯作者:
肖松文 E-mail: zhliu@csu.edu.cn

刘志宏 E-mail: zhliu@csu.edu.cn

文章亮点

(1) 测定了SiO₂饱和的MnO–SiO₂渣和Al₂O₃饱和的MnO–SiO₂渣和Al₂O₃渣中NiO的溶解度及活度系数。
(2) 考察了Ni在Cu–Ni合金与SiO₂饱和的MnO–SiO₂渣或Al₂O₃饱和的MnO–SiO₂渣和Al₂O₃渣间的平衡分配行为。
(3) 建立了渣中NiO活度系数与其含量之间的关系模型。

中文摘要

MnO–SiO₂二元系作为废旧锂离子电池、海洋锰结核还原熔炼过程中的基础渣型，测定有价金属（如镍）在渣中的溶解度、活度及活度系数热力学数据十分必要。为此，本文测定了温度1623 K、氧分压10⁻⁷，10⁻⁶，和10⁻⁵ Pa时SiO₂饱和的MnO–SiO₂渣和Al₂O₃饱和的MnO–SiO₂–Al₂O₃渣中NiO的溶解度和活度系数。结果表明：在试验条件下，镍在MnO–SiO₂渣和MnO–SiO₂–Al₂O₃渣中主要以NiO形式存在，且渣中NiO的溶解度随着氧分压增加而增加；向MnO–SiO₂渣中加入Al₂O₃可以降低渣中镍的溶解度，增加NiO的活度系数。此外，SiO₂饱和的MnO–SiO₂渣和Al₂O₃饱和的MnO–SiO₂–Al₂O₃渣中NiO的活度系数（γ_NiO，以纯固体NiO为参考态）可分别按如下公式计算：γ_NiO = 8.58w(NiO) + 3.18; γ_NiO=11.06w(NiO) + 4.07, 其中，w(NiO)为渣中NiO的质量分数。

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Research Article

Activity coefficient of NiO in SiO₂-saturated MnO–SiO₂ slag and Al₂O₃-saturated MnO–SiO₂–Al₂O₃ slag at 1623 K

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Abstract

Abstract

As a part of the fundamental study related to the reduction smelting of spent lithium-ion batteries and ocean polymetallic nodules based on MnO–SiO₂ slags, this work investigated the activity coefficient of NiO in SiO₂-saturated MnO–SiO₂ slag and Al₂O₃-saturated MnO–SiO₂–Al₂O₃ slag at 1623 K with controlled oxygen partial pressure levels of 10⁻⁷, 10⁻⁶, and 10⁻⁵ Pa. Results showed that the solubility of nickel oxide in the slags increased with increasing oxygen partial pressure. The nickel in the MnO–SiO₂ slag and MnO–SiO₂–Al₂O₃ slag existed as NiO under experimental conditions. The addition of Al₂O₃ in the MnO–SiO₂ slag decreased the dissolution of nickel in the slag and increased the activity coefficient of NiO. Furthermore, the activity coefficient of NiO (γ_NiO), which is solid NiO, in the SiO₂ saturated MnO–SiO₂ slag and Al₂O₃ saturated MnO–SiO₂–Al₂O₃ slag at 1623 K can be respectively calculated as γ_NiO = 8.58w(NiO) + 3.18 and γ_NiO = 11.06w(NiO) + 4.07, respectively, where w(NiO) is the NiO mass fraction in the slag.
- nickel;
- equilibrium;
- MnO–SiO₂ slag;
- MnO–SiO₂–Al₂O₃ slag;
- activity coefficient;
- spent lithium-ion batteries recovery;
- polymetallic nodules

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