Due to the prevalent weathering, spodumene flotation is often susceptible to feldspar slime. In this study, the effect of feldspar slime on spodumene flotation in the NaOL and NaOL/DDA systems was studied. The micro-flotation tests showed that the negative effect of feldspar slime on spodumene flotation could be reduced by using the mixed NaOL/DDA collector with mole ratio of 9/1. The scanning electron microscopic images and the adsorption test results indicated that the decrease of spodumene recovery was attributed to collector consumption by feldspar slime. The mechanism was analyzed by ways of surface tension measurement, atomic force microscopic (AFM) observation and bubble attachment measurements, and the results showed that compared with NaOL alone, the mixed NaOL/DDA collector exhibited a better surface activity owing to a lower value of critical micelle concentration (CMC). The ‘spots’ formed on spodumene surface were thicker, and the formation of TPC was more likely. In addition, the bubble size was smaller and the bubble–particle adhesion was more possibly to occur in the NaOL/DDA system.

由于普遍的风化作用，锂辉石浮选通常易受长石泥的影响。在这项研究中，研究了长石泥对NaOL和NaOL / DDA系统中锂辉石浮选的影响。微浮选试验表明，通过使用摩尔比为9/1的NaOL / DDA混合捕收剂，可以减少长石泥对锂辉石浮选的负面影响。扫描电子显微镜图像和吸附测试结果表明，锂辉石回收率的下降归因于长石煤泥的捕集剂消耗。通过表面张力测量，原子力显微镜（AFM）观察和气泡附着测量等方法对机理进行了分析，结果表明，与单独使用NaOL相比，由于临界胶束浓度（CMC）值较低，因此混合的NaOL / DDA捕集剂表现出更好的表面活性。锂辉石表面上形成的“斑点”较厚，TPC形成的可能性更大。另外，在NaOL / DDA系统中，气泡尺寸较小，并且气泡与颗粒之间的粘附更可能发生。