The ions activation of quartz is a thorny problem that deteriorates the flotation of metal ore. Polymer inhibitors have exhibited excellent depression performance in the selective flotation of metal-ion activated minerals. In this study, the inhibitory role of sodium alginate (NaAl) in the flotation of Ca²⁺-activated quartz was thoroughly explored by zeta potential, dynamic light scattering (DLS), Fourier transform infrared (FTIR) analysis, X-ray photoelectron spectroscopy (XPS) analysis and adsorption test. The flotation results suggested that NaAl could inhibit the flotation of Ca²⁺-activated quartz in sodium oleate (NaOl) system to different degrees, depending on the addition sequence of NaOl and NaAl. More significant depression of Ca²⁺-activated quartz could be achieved when NaAl was added prior to NaOl. It was found that prominent mutual interaction existed among Ca²⁺, NaOl and NaAl in the bulk solution, probably forming calcium alginate–calcium oleate crosslink product, which was not affected by the addition sequence of these two reagents. However, the interfacial behaviors of these two reagents on Ca²⁺-activated quartz surfaces differed under different reagent conditions. The addition of NaAl after NaOl could not only partially desorb the pre-adsorbed NaOl from mineral surfaces, but also decrease the mineral surface hydrophobicity by polymer coating, which therefore deteriorated the flotation of Ca²⁺-activated quartz. In contrast, when NaAl was added prior to NaOl, the pre-adsorption of NaAl made the further adsorption of NaOl rather difficult, which was likely attributed to the reticulated structure of NaAl and the associated steric hindrance effect. As a result, the flotation of Ca²⁺-activated quartz was tightly depressed.

石英的离子活化是一个棘手的问题，它恶化了金属矿石的浮选。聚合物抑制剂在金属离子活化矿物的选择性浮选中表现出优异的抑制性能。本研究通过 zeta 电位、动态光散射 (DLS)、傅里叶变换红外 (FTIR) 分析、X 射线光电子能谱，深入探讨了海藻酸钠 (NaAl) 在 Ca ²⁺活化石英浮选中的抑制作用。(XPS) 分析和吸附试验。浮选结果表明，NaAl对油酸钠(NaOl)体系中Ca ²⁺活化石英的浮选有不同程度的抑制作用，具体取决于NaOl和NaAl的加入顺序。更显着的 Ca ²⁺抑制在 NaOl 之前添加 NaAl 可以实现活化石英。发现本体溶液中Ca ²⁺、NaOl和NaAl之间存在显着的相互作用，可能形成海藻酸钙-油酸钙交联产物，不受这两种试剂添加顺序的影响。然而，这两种试剂在Ca ²⁺活化的石英表面上的界面行为在不同试剂条件下不同。在 NaOl 后加入 NaAl 不仅可以部分解吸矿物表面预先吸附的 NaOl，而且通过聚合物包覆降低了矿物表面的疏水性，从而降低了 Ca ²⁺的浮选能力。-活化石英。相反，当在 NaOl 之前添加 NaAl 时，NaAl 的预吸附使得 NaOl 的进一步吸附相当困难，这可能归因于 NaAl 的网状结构和相关的空间位阻效应。结果，Ca ²⁺活化石英的浮选受到严重抑制。