【摘要】 采用重选和反浮选相结合的方法对广东云浮天然黄铁矿进行提纯,经气流粉碎后获得平均粒径为13μm、T Fe和S含量分别为45.30wt%、50.95 wt%的黄铁矿超微细粉体,采用XRD、EDS、XPS以及TG对黄铁矿超微细粉体进行了表征。XRD与EDS分析结果表明黄铁矿超微细粉体的主要物相为黄铁矿FeS2,粉体颗粒呈不规则形状;TG结果表明黄铁矿超微细粉体在440℃前具有较好的热稳定性,XPS分析表明黄铁矿超微细粉体表面Fe以Fe3+形式存在,S主要以SO42-形式存在。更多还原

【Abstract】 In the work,natural pyrite samples from Yunfu were employed as the source materials,and ultrafine pyrite powder was prepared via deep processing including reelection,reverse floation and airflow grind,which the concentrations of T Fe and S were 45.30 wt%,50.95 wt% respectively and the average grain size was 13 μm.The ultrafine pyrite powder was characterized by X-ray diffraction(XRD),Energy dispersive spectroscopy(EDS),Thermo-gravimetric analysis(TG) and X-ray photoelectron spectroscopy(XPS).XRD and EDS demonstrate the phase of ultrafine pyrite powder is mostly pyrite FeS2.TG shows ultrafine pyrite powder has excellent thermo-stability under 440 ℃.XPS represents that Fe and S on the ultrafine pyrite powder surface exist in the form of Fe3+ and SO42-,respectively.更多还原