Abstract：At present, a common problem in the industry is that ferrotitanium alloys with low titanium content are easily oxidized, but those with high titanium content such as 70 ferrotitanium are difficult to be oxidized during the melting process. In addition, the corrosion of platinum-gold crucible is relatively serious. It is difficult for the oxidants to balance both the oxidation ability and the level of splash control. According to the experiment, potassium nitrate, boric acid and anhydrous sodium carbonate were mixed in a mass ratio of 1∶1∶4, which could completely oxidize the ferro-titanium alloy with high titanium content, and meanwhile, effectively avoid splash loss. 7 g of lithium tetraborate powder was used as the bottom layer. The sample and oxidant were covered with 2 g of mixed flux composed of lithium tetraborate-lithium metaborate-lithium fluoride (m∶m∶m=65∶25∶10). This protocol could avoid the corrosion of platinum-gold crucible. In this way, the determination of major elements (including titanium, silicon, manganese, aluminum, phosphorus and copper) in ferrotitanium alloy by X-ray fluorescence spectrometry (XRF) was realized. The limits of detection for low content manganese, phosphorus and copper were 31.2, 16.8 and 25.5 μg/g, respectively. The results of precision inspection showed that the relative standard deviations (RSD) of testing elements were all not more than 3.0%. The certified reference materials and samples of ferrotitanium alloy were determined according to the experimental method, and the found results were consistent with the certified values or those obtained by the chemical wet method.
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