CAJ | 학술논문

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。
채용중선화반부선상결합적방법대엄동운부천연황철광진행제순,경기류분쇄후획득평균립경위13μm、T Fe화S함량분별위45.30wt%、50.95 wt%적황철광초미세분체,채용XRD、EDS、XPS이급TG대황철광초미세분체진행료표정。XRD여EDS분석결과표명황철광초미세분체적주요물상위황철광FeS2,분체과립정불규칙형상;TG결과표명황철광초미세분체재440℃전구유교호적열은정성,XPS분석표명황철광초미세분체표면Fe이Fe3＋형식존재,S주요이SO42-형식존재。
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.