离心浇铸制样-X-射线荧光光谱法测定锰铁中锰硅磷  

Determination of manganese,silicon,phosphorus in ferromanganese by X-ray fluorescence spectrometry with centrifugal casting preparation of sample

作　　者：陆晓明[1] 金德龙[1] 

机构地区：[1]上海宝山钢铁股份有限公司研究院,上海201900

出　　处：《冶金分析》2008年第9期34-37,共4页Metallurgical Analysis

摘　　要：采用纯铁作为锰铁合金的稀释剂,经高频加热熔融,离心浇铸成块状样品,建立了离心浇铸制样-X-射线荧光光谱法分析锰铁中锰、硅、磷的方法。在陶瓷坩锅中插入石墨坩埚,避免了陶瓷坩锅材料污染测定组分,该制样方法能有效克服铁合金存在的矿物效应和颗粒效应。试验结果表明,块状样品表面不同部位及不同深度的化学成分分布均匀,相同熔融条件下的样品重复性良好,解决了用粉末压片制样对测定结果带来的误差。Mn,Si,P的线性范围分别为70.47%~84.28%,0.43%~1.51%,0.15%~0.34%。方法用于测定锰铁中Mn,Si,P时,相对标准偏差分别为0.17%,1.61%和3.64%,与化学法测定结果相比,具有较好的一致性,满足了常规分析要求。Through using pure iron as dilution agent, the sample of ferromanganese was prepared by high frequency-melting and centrifugal casting into massive sample, then the determination of Mn, Si, P in the sample by X ray fluorescence spectrometry were done. The graphite crucible was put into the ceramic crucible in order to prevent the sample from ceramic crucible polluting. The mineral and arti- cle-size effects could be eliminated with the preparing sample. The results showed that the determined components are homogenous on different position of sample surface and in different depth of the sam- ple, and the repeatahlity of determination resuts was also good under same preparation conditions. So this way could surmount the error from the sample preparation of powder press. The liner ranges of Mn, Si, P are 70. 47%-84. 28%, 0. 43%-1. 51%,0. 15%--0.34%, respectively. The method has been applied to the determination of Mn, Si, P with the relative standard deviations of 0.17% ,1.61% and 3.64 %, and the determined results are in a good agreement with the certified values. The method has been fulfiled the requirements of the routine analysis.

关 键 词：X-射线荧光光谱法 离心浇铸 锰铁 锰 硅 磷 

分 类 号：TG115.33[金属学及工艺—物理冶金]