Abstract：After the slag sample containing rare earth and fluorine was dissolved by HCl at low temperature, the solution was filtrated. Then the residue was melted with anhydrous sodium carbonate-boric acid mixed flux, and the fusion cake was leached with filtrate. Finally, the contents of calcium, magnesium, aluminum, silicon, iron, phosphorus, barium, vanadium, titanium and manganese in the leaching solution were determined by inductively coupled plasma atomic emission spectrometry (ICP-AES). The interference among main elements (calcium, aluminum, silicon and iron) and coexisting elements was investigated. The factors influencing determination were systemically studied. Finally, the optimal instrumental working parameters were obtained and the proper analytical spectral lines were selected. The ten components in slag such as calcium oxide and magnesium oxide showed good linearity in certain concentration range, and the correlation coefficients were higher than 0.999. The determination ranges of components were as follows: 1.00%～50.00% for CaO， 1.00%～25.00% for MgO， 0.10%～40.00% for Al2O3， 1.00%～40.00% for SiO2， 0.05%～30.00% for TFe， 0.001%～15.00% for MnO， 0.003%～5.00% for TiO2， 0.05%～5.00% for V2O5， 0.001%～10.00% for BaO， 0.01%～5.00% for P2O5。. The proposed method has been applied to metallurgical slag certified reference materials containing rare earth and fluorine such as blast furnace slag, converter slag, ping slag and electric furnace slag. The results were consistent with the certified values, and the relative standard deviations (RSD) were 0.38%-3.6%.
