ABSTRACT Styryl phosphoric acid (SPA) is considered to be one of the best selective collectors for rutile flotation. Yet high consumption and considerable environmental pressure have limited its wide applications. In this study, n-nonyl alcohol (NNA) was used as the auxiliary collector to reduce SPA dosage. The experimental results indicated that when SPA was used as the single collector, the rutile flotation presented an optimum index of recovery being 52.26% and the grade being about 45% with a SPA concentration of 0.4 × 10−4 mol L−1. But when 0.4 × 10−4 mol L−1 SPA and 0.4 × 10−4 mol L−1 NNA were used as the mixture collectors, the resulting recovery increases to 82%, and the grade reached 47%. The synergistic adsorption mechanism was investigated by foam properties measurements, zeta potential measurements and FT-IR analysis. NNA increased the foam amount and improved its stability, and quickly reduced the surface tension of the solutions. On the other hand, SPA was first adsorbed on the rutile surface, and then NNA chemically reacted with SPA in the form of hydrogen bond.

中文翻译：

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苯乙烯基磷酸与壬醇在金红石表面的协同吸附机理及对浮选的影响

摘要 苯乙烯基磷酸（SPA）被认为是金红石浮选的最佳选择性捕收剂之一。然而，高消耗和相当大的环境压力限制了它​​的广泛应用。在本研究中，正壬醇 (NNA) 用作辅助捕收剂以减少 SPA 用量。实验结果表明，当SPA作为单一捕收剂时，金红石浮选的最佳回收率为52.26%，品位约为45%，SPA浓度为0.4×10-4 mol L-1。但当0.4×10-4 mol L-1 SPA和0.4×10-4 mol L-1 NNA作为混合物捕收剂时，回收率提高到82%，品位达到47%。通过泡沫特性测量、zeta 电位测量和 FT-IR 分析研究了协同吸附机制。NNA增加了泡沫量，提高了稳定性，迅速降低了溶液的表面张力。另一方面，SPA首先吸附在金红石表面，然后NNA以氢键的形式与SPA发生化学反应。