本文選題：回水 + 黃鐵礦��； 參考：《稀有金屬》2017年07期

【摘要】：通過黃鐵礦純礦物浮選實(shí)驗(yàn)、紫外分光光度計(jì)(UV-Vis)分析、Zeta電位測(cè)定和傅里葉變換紅外光譜(FT-IR)分析研究了工業(yè)回水中超標(biāo)離子(NH+4,Mg~(2+),Ca~(2+),F-)對(duì)黃鐵礦浮選的作用機(jī)制。結(jié)果表明,回水中NH_4~+可以提高礦物表面的電位,擴(kuò)大黃鐵礦浮選的pH值范圍,紅外光譜表明其能促進(jìn)黃鐵礦與黃藥發(fā)生化學(xué)吸附,且礦物表面黃藥吸附量隨著NH+4的增加而增加,經(jīng)NH_4~+活化后,黃鐵礦浮選回收率提高15.5%。而回水中Ca~(2+),Mg~(2+),F-會(huì)抑制黃鐵礦對(duì)黃藥的吸附,浮選回收率平均下降10%。其中,Ca~(2+),Mg~(2+)在黃鐵礦表面易形成親水膜,阻礙黃鐵礦對(duì)黃藥的表面吸附;Zeta電位測(cè)試發(fā)現(xiàn)F-吸附在礦物表面導(dǎo)致礦物表面帶負(fù)電,與同為陰離子的黃原酸根離子形成競(jìng)爭(zhēng)吸附,減少了黃原酸鹽在黃鐵礦表面的吸附量,降低了其可浮性。
[Abstract]:Based on the flotation experiments of pure pyrite minerals, the determination of Zeta potential by UV spectrophotometer and the analysis of FT-IRs by Fourier transform infrared spectroscopy (FTIR), the mechanism of the action of the over-standard ion (NH _ 4H _ 4H _ 2O _ 2) on the flotation of pyrite has been studied. The results show that NH _ 4- can increase the potential of mineral surface and enlarge the pH range of pyrite flotation. The infrared spectrum shows that it can promote the chemical adsorption of pyrite and xanthate. The amount of xanthate adsorbed on mineral surface increased with the increase of NH _ 4. After NH _ 4 ~ activation, the flotation recovery rate of pyrite increased by 15.5g. However, the adsorption of pyrite to xanthate was inhibited by Ca~(2. The average recovery rate of flotation decreased by 10%. The hydrophilic membrane is easily formed on the surface of pyrite, which hinders the adsorption of xanthate on the surface of pyrite by Zeta potential test. It is found that the adsorption of F- on the mineral surface leads to negative charge on the surface of the mineral, which forms a competitive adsorption with the anion xanthate ion. The amount of xanthate adsorbed on the surface of pyrite was reduced, and the floatability of xanthate was decreased.
【作者單位】： 內(nèi)蒙古科技大學(xué)白云鄂博礦多金屬資源綜合利用重點(diǎn)實(shí)驗(yàn)室;內(nèi)蒙古科技大學(xué)礦業(yè)研究院;
【基金】：內(nèi)蒙古自然科學(xué)基金項(xiàng)目(2015MS0559,2014MS0521)資助
【分類號(hào)】：TD923;TD951

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