Sodium citrate was introduced as a depressant for ilmenite flotation, and its effect on the activation of ilmenite and depressing titanaugite was investigated. The flotation results showed that ilmenite was effectively separated from titanaugite as a concentrate with a TiO₂ grade of 43.62% and recovery of 87.42%. The contact angle analysis revealed that sodium citrate further increased the hydrophobicity of ilmenite and decreased it in the case of titanaugite. The zeta potential results indicated that the adsorbed sodium citrate accelerated the adsorption of sodium oleate on the ilmenite surface, but weakened the adsorption on titanaugite. Inductively coupled plasma mass spectrometry (ICP) and solution chemistry analyses illustrated that sodium citrate improved the flotation of ilmenite and depressed the flotation of titanaugite. Furthermore, X-ray photoelectron spectroscopy (XPS) analysis demonstrated that sodium citrate adsorbed onto ilmenite through Fe³⁺ and onto titanaugite through the active sites of Ca and Mg.

引入柠檬酸钠作为钛铁矿浮选的抑制剂，研究了其对钛铁矿活化和钛辉石的抑制作用。浮选结果表明钛铁矿与钛辉石作为精矿与 TiO ₂有效分离品位为 43.62%，回收率为 87.42%。接触角分析表明，柠檬酸钠进一步增加了钛铁矿的疏水性，并在钛辉石的情况下降低了疏水性。zeta电位结果表明吸附的柠檬酸钠加速了油酸钠在钛铁矿表面的吸附，但减弱了对钛辉石的吸附。电感耦合等离子体质谱 (ICP) 和溶液化学分析表明，柠檬酸钠改善了钛铁矿的浮选并抑制了钛辉石的浮选。此外，X 射线光电子能谱 (XPS) 分析表明，柠檬酸钠通过 Fe ³⁺吸附到钛铁矿上，并通过 Ca 和 Mg 的活性位点吸附到钛辉石上。