(中南大學(xué)，資源加工與生物工程學(xué)院，長沙 410083)
摘 要: 通過單礦物浮選試驗考察了組合藥劑十六烷基三甲基氯化銨/辛醇(CTAC/OCT)作為捕收劑時云母的浮選行為，采用表面接觸角測定、吸附量測定、紅外光譜、藥劑吸附形貌分析等方法探討組合捕收劑(CTAC/OCT)與云母的作用機理。結(jié)果表明：適當(dāng)配比的組合藥劑(CTAC/OCT)對云母的捕收效果優(yōu)于單一CTAC的，且組合藥劑對礦漿酸堿性有更好的適應(yīng)性。單一CTAC主要以物理吸附的方式吸附于云母表面，單一OCT在云母表面幾乎不發(fā)生吸附。組合藥劑中，CTAC與OCT存在較強的協(xié)同吸附效應(yīng)。OCT分子通過與CTAC碳鏈締合的方式，穿插吸附于云母表面的CTAC分子之間，從而在云母表面形成更加均勻緊密的單分子吸附層，從而增強云母表面的疏水性，有利于云母礦物的上浮。
關(guān)鍵字: 云母；組合捕收劑；浮選；協(xié)同吸附
（School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:The effects of mixed collectors cetyltrimethylammonium chloride/octanol (CTAC/OCT) on the flotation behavior of muscovite were studied. The contact angle, adsorption amount and FTIR spectra were measured to understand the underlying synergistic mechanism of the flotation behavior. The results show that the mixed CTAC/OCT collectors have a significant role in promoting the recovery of mica compared with single CTAC or OCT, and have better adaptability to the pulp pH. CTAC is adsorbed on the surface of muscovite via physical adsorption, while few OCT molecules can be adsorbed on the surfaces of muscovite. Compared with that of individual CTAC or OCT, the amounts of CTAC and OCT adsorbed on the surfaces of muscovite increase considerably in the mixed systems because of co-adsorption. And these results are confirmed by atom force microscope measurements. Based on these results, the mixed CTAC/OCT exhibits a remarkable synergistic effect during the flotation and adsorption of muscovite.
Key words: muscovite; mixed collectors; flotation; synergistic adsorption
