XRFS DETERMINATION OF MAIN COMPONENTS IN BAUXITE

X-ray fluorescence spectrometry was applied to the analysis of bauxite for its eight main components,i.e.Fe2O3,SiO2,Al2O3,Na2O,K2O,TiO2,CaO and MgO.The bauxite sample was fused with lithium tetraborate as fusing agent,lithium fluoride as assisting fusing agent and ammonium iodide as de-moulding agent,in a Pt-Au crucible into a glass melt.Calibration curve was prepared with standard samples and working standard samples,treated in the same way as the sample.Determinations were made with the XRF-2400 instruments under optimized conditions,and contents of the components were calculated by the help of the calibration curve.Results obtained by the XRFS method were in conformity with the results obtained by chemical method.The XRFS method was proved to be not only simple and rapid in operation but also good in accuracy and precision,and met with the requirements stated in National Standards.