(武漢工程大學(xué) 資源與安全工程學(xué)院，武漢 430073)
摘 要: 針對(duì)傳統(tǒng)黃銅礦抑制劑存在的污染環(huán)境、藥劑消耗量大等問(wèn)題，開(kāi)發(fā)新的抑制方式以實(shí)現(xiàn)銅鉬有效分離極為重要。本文通過(guò)單礦物與混合礦浮選試驗(yàn)研究了過(guò)硫酸銨(APS)氧化對(duì)黃銅礦和輝鉬礦可浮性及銅鉬分離性能的影響，并通過(guò)Zeta電位、拉曼光譜與X射線光電子能譜(XPS)探討了其抑制機(jī)理。浮選結(jié)果表明：APS可以顯著地降低黃銅礦的回收率，而不影響輝鉬礦上浮，進(jìn)而實(shí)現(xiàn)銅鉬的高效分離。Zeta電位、拉曼光譜與XPS結(jié)果表明：APS可以氧化黃銅礦表面生成親水的氧化物與氫氧化物，使黃銅礦受到抑制，而對(duì)輝鉬礦的疏水性和表面性質(zhì)幾乎沒(méi)有影響，從而實(shí)現(xiàn)銅鉬的有效浮選分離。
關(guān)鍵字: 過(guò)硫酸銨；黃銅礦；輝鉬礦；浮選分離；氧化
（School of Resources and Safety Engineering, Wuhan Institute of Technology, Wuhan 430073, China）
Abstract:In view of environmental pollution and large consumption of traditional chalcopyrite depressants, it is important to develop novel depression methods to achieve effective copper-molybdenum separation. In this work, the effect of ammonium persulfate (APS) oxidation on the floatability of chalcopyrite and molybdenite and copper-molybdenum separation performance was investigated by single mineral and mixed minerals flotation tests. The depression mechanism was explored through Zeta potential, Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). The flotation results show that the chalcopyrite recovery is significantly reduced by APS, where as the molybdenite recovery is not affected, thus achieving efficient separation of copper-molybdenum. Zeta potential, Raman spectroscopy and XPS results indicate that APS can oxidize chalcopyrite surface to generate hydrophilic oxides and hydroxides, which leads to chalcopyrite being depressed. But APS has almost no influence on the hydrophobic and surface properties of molybdenite, thereby accomplishing effective flotation separation of copper and molybdenum.
Key words: ammonium persulfate; chalcopyrite; molybdenite; flotation separation; oxidation
