L_(339)抑制剂对沉积变质磷灰岩矿石中的白云石有强烈的选择抑制能力。该药剂用于锦屏、新浦、黄麦岭等磷矿的浮选,可获得高品位、高质量的磷精矿,具有很高的回收率,指标优于迄今试验和使用过的其他任何抑制剂。对其他含镁脉石矿种的浮选,也有可能推广使用这种新型的抑制剂。 L 339 inhibitors have a strong selective inhibitory effect on dolomite deposited in metamorphic apatite ores. The agent is used for the flotation of phosphate rock such as Jinping, Xinpu and Huangmeiling and can obtain high-grade and high-quality phosphate concentrate with a high recovery rate, which is superior to any other inhibitors tested and used so far. Flotation of other Mg-bearing gangue minerals is also likely to promote the use of this new class of inhibitors.