Spodumene frequently coexists with albite, presenting significant challenges in their separation due to their closely similar physical and chemical characteristics. In the present study, a noval reagent scheme has been proposed for the selective activation of spodumene by Zn2+ ions within the sodium oleate (NaOL) system. This innovative approach aims to enhance the efficiency of spodumene activation, thereby improving overall process performance. Micro-flotation experiments were conducted to investigate the recovery of spodumene and albite. The results show a high spodumene recovery of 90.33 % at pH 10.0, with the addition of 2 × 10−4 mol/L Zn2+ ions and NaOL. In contrast, the recovery of albite remains low at 17.93 %. Artificial mixed mineral experiments have demonstrated a remarkable separation efficiency of spodumene and albite. The activation mechanisms were explored by contact angle, solution chemistry analysis, zeta potential, Fourier Transform Infrared (FTIR) Spectroscopy, and X-ray Photoelectron Spectroscopy (XPS). The findings reveal that spodumene exhibits enhanced hydrophobicity compared to albite after treatment with Zn2+ ions and NaOL. It is also observed that Zn2+ ions activate spodumene by bonding with oxygen atoms on the spodumene surface and forming precipitates on the surface of spodumene within the optimal pH range. Unlike the spodumene surface, Zn2+ ions form weak bonds with the albite surface. Following the activation of Zn2+ ions, NaOL demonstrates a remarkable capacity to absorb on the surface of spodumene. This phenomenon leads to a substantial disparity in the floatability of spodumene and albite, consequently facilitating their effective flotation separation.

中文翻译：

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使用油酸钠作为捕收剂，通过 Zn（II.） 离子活化增强锂辉石浮选

锂辉石经常与钠长石共存，由于它们的物理和化学特性非常相似，因此在分离方面带来了重大挑战。在本研究中，提出了一种新型试剂方案，用于油酸钠 （NaOL） 系统内的 Zn2+ 离子选择性活化锂辉石。这种创新方法旨在提高锂辉石活化的效率，从而提高整体工艺性能。进行了微浮选实验，以研究锂辉石和钠长石的回收率。结果表明，在 pH 值为 10.0 时，添加 2 × 10-4 mol/L Zn2+ 离子和 NaOL 后，锂辉石回收率高达 90.33%。相比之下，钠长石的回收率仍然很低，为 17.93 %。人工混合矿物实验表明，锂辉石和钠长石具有显著的分离效率。通过接触角、溶液化学分析、zeta 电位、傅里叶变换红外 （FTIR） 光谱和 X 射线光电子能谱 （XPS） 探索激活机制。研究结果表明，与钠长石相比，锂辉石在用 Zn2+ 离子和 NaOL 处理后表现出更强的疏水性。还观察到 Zn2+ 离子通过与锂辉石表面的氧原子键合并在最佳 pH 范围内在锂辉石表面形成沉淀物来激活锂辉石。与锂辉石表面不同，锌 2+ 离子与钠长石表面形成弱键。在 Zn2+ 离子活化后，NaOL 在锂辉石表面表现出显着的吸收能力。这种现象导致锂辉石和钠长石的可浮性存在巨大差异，从而促进了它们的有效浮选分离。