长石的可浮性主要取决于它的表面状态,即表面的水解程度。按布鲁瑙厄—埃梅特—泰勒法(BET法)测定的比表面积可作为评价的依据。表面水解的长石,在矿浆经强烈机械搅拌时,细矿粒分散,可使捕收剂用量显著减少。长石表面粘附较多云母矿物的矿石,采用这种预处理法,同样能收到较好的效果。在水介质中放置短时间后,长石表面即发生变化,使可浮性下降。因此,药剂作用时间及矿石在浮选机中的停留时间应尽量减少。考虑到在有HF存在的矿浆中,矿物表面的铁离子大量溶解,并与F~-离子结合成键。所以,浮选前应尽量除去富含铁的矿物。 The flotability of feldspar depends mainly on its surface state, that is, the degree of surface hydrolysis. The specific surface area determined by the Brunauer-Emmet-Taylor method (BET method) can be used as a basis for evaluation. Surface hydrolysis of feldspar in the pulp by strong mechanical stirring, the fine mineral particles dispersed, can significantly reduce the amount of collector. Feldspar surface adhesion of mica mineral ore, using this pretreatment method, the same can receive better results. After a short period of time in the aqueous medium, the surface of the feldspar has changed so that floatability decreases. Therefore, the role of pharmaceutical agents and ore in the flotation machine residence time should be minimized. Considering that in the presence of HF, the iron ions on the mineral surface dissolve in large quantities and bond with F ~ - ions. Therefore, flotation should be removed before the iron-rich minerals.