(中南大學(xué) 資源加工與生物工程學(xué)院，長沙410083)
摘 要: 采用浮選實驗和DLVO理論計算，研究鈦輝石和鈦鐵礦各自的可浮性以及各粒級鈦輝石對鈦鐵礦可浮性的影響規(guī)律及機(jī)理。浮選實驗結(jié)果表明：鈦鐵礦具有很好的可浮性，鈦輝石可浮性較差；粒徑小于10 µm的鈦輝石對鈦鐵礦回收率影響很大。DLVO理論計算結(jié)果表明：當(dāng)pH=5.9時，兩種礦物顆粒間的總相互作用能為負(fù)值，表現(xiàn)為相互吸引，微細(xì)粒級的鈦輝石會在鈦鐵礦表面上粘附，使鈦鐵礦的回收率顯著降低；當(dāng)pH=8.5時，由于靜電排斥能大，總相互作用能仍表現(xiàn)為較強(qiáng)的排斥力，微細(xì)粒鈦輝石不能粘附在鈦鐵礦表面。
關(guān)鍵字: 鈦鐵礦；鈦輝石；浮選；DLVO理論
（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
