(中南大学 资源加工与生物工程学院，长沙410083)
摘 要: 采用浮选实验和DLVO理论计算，研究钛辉石和钛铁矿各自的可浮性以及各粒级钛辉石对钛铁矿可浮性的影响规律及机理。浮选实验结果表明：钛铁矿具有很好的可浮性，钛辉石可浮性较差；粒径小于10 µm的钛辉石对钛铁矿回收率影响很大。DLVO理论计算结果表明：当pH=5.9时，两种矿物颗粒间的总相互作用能为负值，表现为相互吸引，微细粒级的钛辉石会在钛铁矿表面上粘附，使钛铁矿的回收率显著降低；当pH=8.5时，由于静电排斥能大，总相互作用能仍表现为较强的排斥力，微细粒钛辉石不能粘附在钛铁矿表面。
关键字: 钛铁矿；钛辉石；浮选；DLVO理论
（School of Resources Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:The flotabilty of titanaugite and ilmenite and the effects of different size fractions of titanaugite on the flotability of ilmenite were studied by flotation tests and DLVO theoretical calculations. The flotation results show that ilmenite has good flotability, however, titanaugite has poor flotabitity, and titanaugite with the grain size bellow 10 µm has serious effect on the recovery of ilmenite.The results of DLVO theoretical calculations indicate that the total acting energy between the titanaugite and ilmenite particles at pH 5.9 is negative, showing as attraction, which causes the superfine titanaugite particles attach on the surface of ilmenite. At pH 8.5, because of large electrostatic repulsion energy, the total acting energy shows as strong repulsion, thus the superfine titanaugite particles can not attach on the surface of ilmenite.
Key words: ilmenite; titanaugite; flotation; DLVO
