In this paper, a lfotation route was adopted to separate feldspar from quartz in neutral medium, using sodium oleate (anionic collector) and lauryl amine (cationic collector) as the lfotation collectors. The effect of the lfotation conditions on the separating efifciency and the adsorbing behaviors of the collectors on quartz and albite powders was also investigated, The experimental results showed that the optimum lfotation conditions were as follows:lfoating temperature of 40℃, pH value of 8, 3×10-3 mol/L of the anionic collector concentration, and 6.25×10-4 mol/L of the cationic collector concentration. The maximum recovery rates of feldspar and quartz under the optimum lfotation conditions are 70.99%and 1.09%, respectively. The recovery difference between feldspar and quartz was as high as 69.9%, showing a high separating efifciency. The results of infrared spectra and Zeta potential analyses revealed that the interaction between sodium oleate and feldspar resulted from the physical and chemical adsorption, while that between sodium oleate and quartz was due to the physical adsorption, suggesting that sodium oleate was more efifcient in collecting feldspar.%用阴离子捕收剂油酸钠和阳离子捕收剂十二胺作为浮选捕收剂，在近中性条件下浮选分离长石和石英，研究了浮选条件对分离效果的影响以及捕收剂在矿物表面的吸附行为。实验结果表明，最佳浮选条件为：浮选温度为40℃、pH值为8、阴离子捕收剂浓度为3×10-3 mol/L、阳离子捕收剂浓度为6.25×10-4 mol/L。在最佳浮选条件下，长石回收率为70.99%，石英回收率为1.09%，差值达69.9%，分离效果显著。Zeta电位和红外光谱分析表明，油酸钠对长石不仅有物理吸附还存在化学吸附作用，对石英仅有物理吸附，因而对长石有更强的捕收能力。
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