Application of BPMA to the Analysis of Iron Samples
The automatic mineral analysis system based on scanning electron microscope(SEM)-X-ray energy spectrometry(EDS)has some difficulties in distinguishing adjacent minerals with similar atomic numbers,and often requires special sample preparation methods or measurement schemes,or supplemented by other measurement methods.In this paper,a sample containing iron was tested and analyzed in one time by the BPMA system,and the detailed analysis results of magnetite hematite were compared with the typical characteristics of the sample under the optical microscope.The results show that the distinction of magnetite hematite is basically the same as that under the optical microscope.Although the method lacks precision,it is easy to operate,and it is suitable for the detection and analysis of magnetite hematite with low requirement for accurately distinguishing magnetite.To meet the needs of higher precision analysis,an automatic analysis system of optical image,BSE(backscattered electron map)and EDS spectra can be introduced into the optical microscope to realize the fusion of three signals through heterosource configuration.
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