(中南大學(xué) 資源加工與生物工程學(xué)院，長(zhǎng)沙 410083)
摘 要: 以油酸鈉為捕收劑，通過(guò)浮選實(shí)驗(yàn)、溶液化學(xué)計(jì)算、動(dòng)電位和紅外光譜檢測(cè)研究了微細(xì)粒鈦鐵礦的可浮性及藥劑與礦物的作用機(jī)理。結(jié)果表明：當(dāng)油酸鈉濃度為0.2 mmol/L時(shí)，微細(xì)粒鈦鐵礦可浮性較好的pH值為4~10。油酸鈉對(duì)鈦鐵礦的捕收作用主要由兩方面因素控制：當(dāng)pH值為4~6時(shí)，以油酸根離子與鈦鐵礦表面鐵質(zhì)點(diǎn)間發(fā)生化學(xué)作用為主，紅外光譜分析顯示作用產(chǎn)物為油酸鐵；當(dāng)pH值為6~10時(shí)，上述化學(xué)作用減弱，但油酸鈉溶液中高表面活性組分離子−分子締合物濃度增大，使鈦鐵礦保持了較好的可浮性。
關(guān)鍵字: 鈦鐵礦；油酸鈉；溶液化學(xué)；浮選
（School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract: The flotation of fine ilmenite using sodium oleate as collector and the collection mechanism were studied through flotation tests, solution chemistry calculations, zeta potential measurements and infrared spectroscopic analysis. The results show that fine ilmenite shows good floatability in pH range of 4−10, when the concentration of sodium oleate is 0.2 mmol/L. The collection of sodium oleate to ilmenite is controlled by two factors. In pH range of 4−6, chemical reactions between oleate and iron play important roles, and infrared spectroscopic analysis shows that the product of their reactions is ferrous oleate. While in pH range of 6−10, the above reactions become weaker, but the concentration of ion and molecular association of a high surface activity component in sodium oleate solution becomes higher and keeps the floatability good.
Key words: ilmenite; sodium oleate; solution chemistry; flotation
