X射线荧光光谱法测定铁矿石中全铁及18个次量成分

来源期刊：冶金分析2011年第5期

论文作者：廖海平 付冉冉 任春生 余清 张爱珍

文章页码：36 - 40

关键词：铁矿石； X射线荧光光谱法； 全铁； 次量成分

Key words：iron ore； X-ray fluorescence spectrometry； total iron； minor element

摘    要：采用X射线荧光光谱法测定铁矿石中主量成分(TFe)及18个次量成分(P、SiO₂、Al₂O₃、CaO、MgO、Mn、TiO₂、V₂O₅、K₂O、S、Cr₂O₃、Ni、Co、Zn、Pb、Cu、Na₂O、As)。以固定理论α影响系数法校正基体效应,使各成分的适用检测范围都得到较大拓宽;采用熔融方法制样,消除了试样的粒度效应和矿物效应。为了避免S的损失,样品经预氧化后灼烧,由软件计算或准确测定样品的烧失量。精密度试验表明,各成分的标准偏差(SD)为0.001%～0.268%。方法用于铁矿石实际样品分析,结果与其他方法结果相吻合。

Abstract: The contents of total iron(TFe) and eighteen minor components including P,SiO₂,Al₂O₃,CaO,MgO,Mn,TiO₂,V₂O₅,K₂O,S,Cr₂O₃,Ni,Co,Zn,Pb,Cu,Na₂O and As were determined by X-ray spectrometry.The matrix effect was corrected by fixed theoretica1 α influence coefficient method.Consequently,the measuring ranges of components were broadened obviously.The preparation of sample by fusion eliminated the granularity and mineral effects of sample.The loss of S was avoided by the ignition of sample after pre-oxidation.The loss on ignition of sample was calculated using software or determined accurately.The precision test showed that the standard deviations(SDs) were 0.001%-0.268%.The proposed method was applied to the analysis of actual iron ore sample,and the results were consistent with those obtained by other methods.