(中南大學(xué) 資源加工與生物工程學(xué)院，長(zhǎng)沙 410083)
摘 要: 研究了在油酸鈉為捕收劑的浮選體系中，兩種含硅抑制劑氟硅酸鈉和水玻璃對(duì)微細(xì)粒鈦鐵礦與鈦輝石浮選行為的影響。在實(shí)際礦石試驗(yàn)中，以水玻璃作為抑制劑且在弱酸性條件下(pH=5~6)成功實(shí)現(xiàn)鈦鐵礦與鈦輝石的浮選分離，并通過吸附量測(cè)試、X射線光電子能譜(XPS)測(cè)試分析了水玻璃選擇性分離鈦鐵礦的作用機(jī)理。結(jié)果表明：水玻璃對(duì)油酸鈉在鈦鐵礦表面吸附影響小，卻能在較大程度上降低油酸鈉在鈦輝石表面的吸附量，這為兩種礦物的分離提供依據(jù)。其主要原因在于水玻璃能夠與鈦輝石表面的Mg、Fe和Al原子發(fā)生化學(xué)鍵合，增加鈦輝石的親水性，從而減少捕收劑在其表面的吸附。
關(guān)鍵字: 鈦鐵礦；鈦輝石；抑制劑；浮選；水玻璃
（School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China）
Abstract:Using sodium oleate as collector, the effects of sodium fluorosilicate and water glass on floatation behavior of fine ilmenite and titanaugite were investigated. The results show that, using the water glass as depressant in the weak acidic system with pH of 5−6, the ilmenite and titanaugite can be successfully separated by flotation in practical ore experiment. The results of adsorption measurements and X-ray photoelectron spectroscopy (XPS) show that the mechanism of selective separation of ilmenite by the water glass, namely, the water glass can effectively prevent the adsorption of sodium oleate onto the surface of titanaugite, while it shows little effect on the adsoption of sodium oleate onto ilmenite, which is the basis for flotation separation of both of minerals. Above-mentioned mechanism comes from the formed chemical bonds between the water glass and Fe，Mg and Al atoms on the surface of titanaugite, which effectively increases the hydrophilicity of titanaugite, as a result, reducing the adsorption of collector on titanaugite.
Key words: ilmenite; titanaugite; depressants; flotation; water glass
