通过单矿物浮选试验对异极矿和菱锌矿在十二胺体系中的浮游性进行了研究.浮选试验结果表明,异极矿的可浮性高于菱锌矿,当pH值在10~11范围内,十二胺对两种矿物的捕收性最好.溶液化学计算和zeta电位测试结果表明,十二胺主要通过静电作用吸附在异极矿和菱锌矿表面,十二胺分子和十二胺阳离子之间的缔合作用能够增强十二胺对两种矿物的捕收能力.zeta电位测试、XPS测试和溶液化学计算的结果表明,异极矿的零电点低于菱锌矿的零电点.第一性原理计算和接触角测试的结果表明,异极矿的疏水性大于菱锌矿.%Monomineral flotation tests have been carried out for investigating the flotability of hemimorphite and smithsonite in dodecylamine ( DDA) system. Flotation test results show that flotability of hemimorphite is higher than smithsonite, both of them have the best flotability in the range of pH 10~11 . Solution chemistry calculation and zeta potential measurement results show that DDA adsorbs on hemimorphite and smithsonite surface mainly through the electrostatic interaction, and the association reactions between DDA molecular and DDA cationic can enhance the collecting capacity. Zeta potential measurement, X-ray photoelectron spectroscopy ( XPS ) detection and solution chemistry calculation results show that the point of zero charge ( PZC) of hemimorphite is less than that of smithsonite. The first-principles calculations and contact angle measurement results show that hemimorphite is more hydrophobic than smithsonite.
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