(中南大學(xué) 資源加工與生物工程學(xué)院，長沙 410083)
摘 要: 采用單礦物浮選實(shí)驗(yàn)，接觸角實(shí)驗(yàn)，兩相、三相泡沫動態(tài)穩(wěn)定性實(shí)驗(yàn)，研究組合藥劑油酸鈉(NaOL)-辛醇(OCT)對一水硬鋁石浮選行為的影響規(guī)律及其作用機(jī)理。通過測定組合藥劑與一水硬鋁石作用前后溶液的TOC含量，分析組合藥劑作用下一水硬鋁石三相泡沫穩(wěn)定性的原因。結(jié)果表明：在礦漿pH=7.0條件下，組合藥劑與單一NaOL浮選一水硬鋁石結(jié)果相比，NaOL物質(zhì)的量在組合藥劑總物質(zhì)的量中所占的摩爾分?jǐn)?shù)x(NaOL)≥40%時有利于提高一水硬鋁石的浮選回收率。其中，x(NaOL)=40%和x(NaOL) =60%的組合藥劑因通過形成更穩(wěn)定的三相泡沫而提高一水硬鋁石的浮選回收率；x(NaOL) =80%的組合藥劑不僅能增強(qiáng)浮選泡沫穩(wěn)定性，還能增大礦物表面疏水性從而提高一水硬鋁石浮選回收率。
關(guān)鍵字: 一水硬鋁石；組合藥劑；浮選；泡沫
（School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:The synergistic effects of the mixed anionic sodium oleic acid and nonionic octanol reagents on the flotation of diaspore were investigated by flotation test, contact angle, foam and froth dynamic stability measurement. The reason for the froth dynamic stability was studied by TOC content of mixed reagents solution before and after diaspore adsorption. The results show that the mole fraction of NaOL greater than 40% is beneficial to improve the flotation recovery of diaspore at pH=7.0. Compared with single NaOL, the froth dynamic stability is higher than the froth stability of NaOL alone at x(NaOL)=40% and x(NaOL)=60%, thus, the recovery of flotation increases. Moreover, the surfactants at x(NaOL)=80% enhance the flotation of diaspore because of forming more stable froth and more hydrophobic surface on minerals.
Key words: diaspore; mixed reagents; flotation; froth
