(中南大学 资源加工与生物工程学院，长沙 410083)
摘 要: 采用单矿物浮选实验，接触角实验，两相、三相泡沫动态稳定性实验，研究组合药剂油酸钠(NaOL)-辛醇(OCT)对一水硬铝石浮选行为的影响规律及其作用机理。通过测定组合药剂与一水硬铝石作用前后溶液的TOC含量，分析组合药剂作用下一水硬铝石三相泡沫稳定性的原因。结果表明：在矿浆pH=7.0条件下，组合药剂与单一NaOL浮选一水硬铝石结果相比，NaOL物质的量在组合药剂总物质的量中所占的摩尔分数x(NaOL)≥40%时有利于提高一水硬铝石的浮选回收率。其中，x(NaOL)=40%和x(NaOL) =60%的组合药剂因通过形成更稳定的三相泡沫而提高一水硬铝石的浮选回收率；x(NaOL) =80%的组合药剂不仅能增强浮选泡沫稳定性，还能增大矿物表面疏水性从而提高一水硬铝石浮选回收率。
关键字: 一水硬铝石；组合药剂；浮选；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
