Abstract：The rapid and accurate determination of zinc content in blast furnace dust has important guiding significance for the scientific reuse of blast furnace dust. The composition of blast furnace dust is complex which contains ore, refractory matters, tar oil and other materials. The pretreatment of sample is complicated with high detection difficulty. The sample was treated by microwave digestion with hydrochloric acid-nitric acid-hydrofluoric acid-hydrogen peroxide system, realizing the complete digestion of sample. The sample solution was determined by inductively coupled plasma atomic emission spectrometry (ICP-AES) with Zn 206.201 nm as the analytical line. Consequently, a method for determination of zinc in blast furnace dust was established. Under the optimal experimental conditions, the mass concentration of zinc in the range of 5.00-100.00 μg/mL had a linear relationship with its corresponding emission intensity. The linear correlation coefficient was 0.999 9. The limit of detection of this method was 0.000 92% (mass fraction). The matrix effect was discussed, and it was found that iron matrix in blast furnace dust had no significant influence on the determination of zinc. The contents of zinc in blast furnace dust samples were determined according to the proposed method. The relative standard deviations (RSD,n=11) of determination results were between 0.23% and 0.87%, and the recoveries were between 98% and 102%.
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