1.Shenyang Institute of Geology and Mineral Resources, Shenyang 110032,China; 2. East Coal Geological Bureau of Shenyang Testing Center, Shenyang 110032,China
Abstract：The sample was prepared by fusion method. The analysis of MgO, Al2O3, SiO2, CaO, P2O5, TiO2, TFe2O3, Na2O, K2O and MnO in magnesia refractory materials(magnesium brick products) and raw materials (brucite and raw magnesite etc.) by X-ray fluorescence spectrometry was established. Compared with previous methods, the content test of Na2O and K2O was added. It provided basis for the final accurate test of MgO. The flux system for high magnesium sample (the content of MgO was higher than 90 %) as well as the dilution ratio between sample and flux were discussed. Meanwhile, the correction of loss on ignition for samples with high ignition loss (such as brucite and magnesite) was also investigated. The calibration curves of the method were established with series calibration samples prepared by national standard sample GBW07105 and high-purity magnesia. The absorption enhancement effect among coexisting elements was regressed and corrected by empirical coefficient method. The detection limit of method was between 0.031 % and 0.45 %. The precision test of sample was conducted. The relative standard deviation (RSD,n=10) of each components was 0.31 %-3.4 %. Synthetic samples and CRM were tested, and the results were consistent with those obtained by wet method.
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