Abstract：A determination method for the major components such as copper, molybdenum, iron, sulfur, silicon dioxide and calcium oxide was established by X-ray fluorescence spectrometry with fusion sample preparation. The experimental parameters were optimized through observing experimental phenomenon and analyzing the responses of each element with sample fusion preparation. It was determined that 0.400 0 g of sample amount, 2.000 0 g of oxidizer LiNO3, 6.000 0 g of mixed flux Li2B4O7/LiBO2 (m∶m=67∶33), 8 min pre-oxidation, 8 min fusion, 4+2 min two-way swing fusion and LiBr release agent was adopted. Copper ore and molybdenum ore national certified reference materials were mixed to prepare calibration sample series with content gradient to ensure the linear range of calibration curve cover the whole distribution range of target element in the beneficiation samples of sulfide copper-molybdenum ores. The detection limit was respectively 14 (Cu), 24 (Mo), 85 (Fe), 31(S), 56 (SiO2), 70 (CaO) μg/g. Two mixed standard samples were analyzed and the results were compared with the reference values. The relative standard deviation (n=10) was 0.09%-0.68%.
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