The mixed anionic/cationic collector sodium oleate/ N-lauryl-1, 3-propylene diamine (NaOL/ND13) was firstly used to separate spodumene from feldspar and exhibited high selectivity. The flotation experiments of single and artificial-mixed mineral showed that the mixed NaOL/ND13 (NaOL: ND13 = 5:1) exhibited excellent flotation separation performance for spodumene from feldspar at pH 8.0. The zeta potential measurement results showed that both NaOL and ND13 adsorbed on the mineral surface through chemical and electrostatic adsorption, respectively. The FTIR measurement results showed that the dominant species of NaOL/ND13 adsorbed strongly on mineral surface than each of its components and the interaction between collector and spodumene surface was stronger than that of feldspar surface. Contact angle measurements showed the mixed NaOL/ND13 amplified the difference in surface hydrophobicity between spodumene and feldspar. Ultra-microcalorimetric measurements showed the greater the absolute values of the net reaction heat for spodumene and feldspar reacted with collectors, the better their flotation separability. XPS further showed that NaOL/ND13 had strong chemical reaction with Al sites on mineral surface, but the interaction of NaOL/ND13 with spodumene was stronger than that with feldspar. Therefore, the results of this study are expected to provide more reference value and a meaningful guide for the development of selective flotation collectors for spodumene and feldspar.

混合阴离子/阳离子捕收剂油酸钠/N-月桂基-1, 3-丙二胺(NaOL/ND13)首次用于从长石中分离锂辉石并表现出高选择性。单一矿物和人工混合矿物的浮选实验表明，混合NaOL/ND13（NaOL:ND13=5:1）在pH 8.0条件下对长石中的锂辉石表现出优异的浮选分离性能。Zeta 电位测量结果表明，NaOL 和 ND13 分别通过化学吸附和静电吸附吸附在矿物表面。FTIR 测量结果表明，NaOL/ND13 的优势物质在矿物表面的吸附能力强于其各组分，捕收剂与锂辉石表面的相互作用强于长石表面。接触角测量显示混合的 NaOL/ND13 放大了锂辉石和长石之间表面疏水性的差异。超微量热测量表明，锂辉石和长石与捕收剂反应的净反应热的绝对值越大，其浮选分离性越好。XPS进一步表明NaOL/ND13与矿物表面的Al位点发生强烈的化学反应，但NaOL/ND13与锂辉石的相互作用强于与长石的相互作用。因此，该研究结果有望为锂辉石和长石选择性浮选捕收剂的开发提供更多的参考价值和有意义的指导。超微量热测量表明，锂辉石和长石与捕收剂反应的净反应热的绝对值越大，其浮选分离性越好。XPS进一步表明NaOL/ND13与矿物表面的Al位点发生强烈的化学反应，但NaOL/ND13与锂辉石的相互作用强于与长石的相互作用。因此，该研究结果有望为锂辉石和长石选择性浮选捕收剂的开发提供更多的参考价值和有意义的指导。超微量热测量表明，锂辉石和长石与捕收剂反应的净反应热的绝对值越大，其浮选分离性越好。XPS进一步表明NaOL/ND13与矿物表面的Al位点发生强烈的化学反应，但NaOL/ND13与锂辉石的相互作用强于与长石的相互作用。因此，该研究结果有望为锂辉石和长石选择性浮选捕收剂的开发提供更多的参考价值和有意义的指导。