【摘要】 考察了不同粒度下氧化皮的X射线衍射图谱,结果表明,270～400目粒度下氧化皮衍射峰强度最强。利用分析评估程序处理了氧化皮的X射线衍射图谱,并和PDF-2数据库(国际衍射数据中心)中数据进行比对,以找出其特征物相。结果表明,氧化皮的特征物相为三氧化二铁、四氧化三铁、氧化亚铁共存,而其它杂质物相含量极低。经过与天然铁矿石的特征物相进行比对,发现其中氧化亚铁物相是氧化皮区别于铁矿石的主要特征,因此氧化亚铁物相的存在可以作为鉴定铁矿石中是否掺杂氧化皮的重要指标,由此建立了铁矿石中氧化皮的X射线衍射鉴定方法,方法能够对含量高于10%的氧化皮进行鉴定。更多还原

【Abstract】 The X-ray diffraction spectrum of mill scale with different sizes was investigated.The results showed that,the diffraction peak intensity was the strongest for the mill scale with particle size of 270-400 mesh.The X-ray diffraction spectrum of mill scale was treated by analysis and evaluation program,and the results were compared with data in PDF-2 database(International Centre for Diffraction Data)to find out the characteristic phases.It was found that the characteristic phases of mill scale were coexisting ferric oxide,magnetic iron oxide and ferrous oxide while the content of other impurity phases was very low.Based on the comparison with characteristic phases of natural iron ore,it was found that,the ferrous oxide phase was the main characteristic to differentiate mill scale from iron ore.Therefore,the presence of ferrous oxide phase could be considered as an important index to identify whether mill scale was doped in iron ore.Based on this,an identification method of mill scale in iron ore was established by X-ray diffraction method.This method could be applied to the identification of mill scale with content higher than 10%.更多还原