The study explored a new combination amine collector (XK-28) that can obtain better flotation index and defoaming rate for magnetic iron ore. A pure quartz mineral test indicates that dodecylamine, XK-I, or XK-II has good collection effect on quartz and their best flotation pH is in the range of 6–7. The experimental results of a combination collector (XK-I:XK-II = 2:8.) show that the separation effect for quartz and magnetite is better than that of a single collector. The single factor for actual mineral test shows that when the combined reagent is used as the collector, the best conditions are pH = 7, 90 g/t dosage, and XK-I:XK-II = 2:8, which is consistant with the pure mineral test. The difference for dodecylamine as a collector is that the optimal dodecylamine dosage is 60 g/t. Under the best conditions of actual ore test, dodecylamine and XK-28 are respectively used as the collector to compare the flotation indexes. Study results indicate the magnetite grade using XK-28 as the collector is higher by 3.02% than that of using dodecylamine, recovery is increased by 1.92% over that of using dodecylamine. Based on the measurement results of zeta potential, uses of XK-28 can slightly increase the zeta potential difference of quartz and magnetite to enhance the flotation effect. The mechanism of action between the XK-28 collector and the actual ore from the Gongchangling plant is physical adsorption, and this adsorption also has hydrogen bond formation. Contact angle results shows that XK-28 improves the hydrophobicity of quartz better than dodecylamine. Compared with dodecylamine, XK-28 is more sparsely arranged on the surface of the foam. The foam produced by the XK-28 collector has better air permeability and it is more likely to merge and disappear with bubbles.

研究探索了一种新型组合胺类捕收剂（XK-28），可以获得更好的磁性铁矿石浮选指数和消泡率。纯石英矿物试验表明，十二胺、XK-I或XK-II对石英具有良好的捕收效果，其最佳浮选pH值在6-7之间。组合捕收器（XK-I:XK-II = 2:8.）的实验结果表明，石英和磁铁矿的分离效果优于单一捕收器。实际矿物试验单因素表明，复合试剂作为捕收剂时，最佳条件为pH=7，用量90g/t，XK-I:XK-II=2:8，与纯矿物测试。十二胺作为捕收剂的不同之处在于十二胺的最佳用量为 60 g/t。在实际矿石试验的最佳条件下，分别以十二胺和XK-28为捕收剂，比较浮选指标。研究结果表明，使用XK-28作为捕收剂的磁铁矿品位比使用十二胺提高了3.02%，回收率比使用十二胺提高了1.92%。根据zeta电位的测量结果，使用XK-28可以略微增加石英和磁铁矿的zeta电位差，从而增强浮选效果。XK-28捕收剂与弓长岭厂实际矿石的作用机理是物理吸附，这种吸附也有氢键形成。接触角结果表明XK-28比十二胺更好地提高石英的疏水性。与十二胺相比，XK-28在泡沫表面的排列更为稀疏。