(中南大學(xué) 礦物工程系， 長(zhǎng)沙 410083)
摘 要: 用油酸鈉為捕收劑，研究了一水硬鋁石和高嶺石的可浮性，并對(duì)捕收劑與礦物的作用機(jī)理進(jìn)行了探討，結(jié)果表明：油酸鈉對(duì)一水硬鋁石和高嶺石的捕收主要由兩方面因素控制，在pH 4～7范圍內(nèi)，為化學(xué)反應(yīng)起主要作用，在pH 7～10以形成離子分子締合物為主要因素；在以油酸鈉為捕收劑時(shí)，礦物表面活性Al3+數(shù)量的不同導(dǎo)致了高嶺石和一水硬鋁石的可浮性差異，這為鋁土礦正浮選脫硅提供了理論依據(jù)。
關(guān)鍵字: 捕收劑； 一水硬鋁石； 高嶺石； 油酸鈉； 離子分子締合物
collected by sodium oleate
（Department of Mineral Process, Central South University,
Changsha 410083, P.R.China）
Abstract:The floatability of diaspore and kaolinite using sodium oleate as collector was studied and the collection mechanism of sodium oleate on minerals was investigated. The collection is controlled by two factors. Chemical reaction plays an important role during pH4～7, and on the other side, forming ion-molecular association is dominant factor during pH 7～10. Using sodium oleate as collector, the different floatability of diaspore and kaolinite results from the different amount of active Al3+ on the surface of minerals, which offers theoretics foundation for desilicate of bauxite by floatation.
Key words: collector； diaspore； kaolinite； sodium oleate； ion-molecular association
