Abstract:Nearly 100 million tons of sintering dedusting ash are produced in the process of industrial production in China every year. The accurate determination of elemental contents in sintering dedusting ash can greatly improve its recovery and reuse rate. Since the content of iron and carbon in sintering dedusting ash was relatively high, the sample was dissolved in hydrochloric acid-nitric acid-hydrofluoric acid by microwave digestion. The efficient dissolution of sample could eliminate the interference of carbon. The standard series solution was prepared by matrix matching method. Fast Automated Curve-Fitting (FACT) and automatic matching method were combined to effectively correct the interference caused by matrix iron. K 766.491nm, Na 588.995nm, Ca 317.933nm, Mg 285.213nm, Al 308.215nm, Zn 206.200nm, Pb 283.305nm, Cu 324.754nm and P 177.434nm were selected as the analytical lines. The determination method of potassium, sodium, calcium, magnesium, aluminum, zinc, lead, copper and phosphorus in sintering dedusting ash by inductively coupled plasma atomic emission spectrometry (ICP-AES) was established. The results showed that the linear correlation coefficients of calibration curves were all greater than 0.9990 under the optimal working conditions of instrument. The limits of quantification for elements were between 0.0006% and 0.0032%. The proposed method was applied for the determination of nine elements in two sintering dedusting ash samples. The relative standard deviations (RSD, n=6) of determination results were all less than 5.0%. The contents of potassium, sodium, calcium, magnesium, aluminum, zinc, lead, copper and phosphorus in one sintering dedusting ash sample were determined according to the experimental method and by other chemical methods. The found results were basically consistent.
任玲玲, 谭胜楠, 李建朝. 微波消解-电感耦合等离子体原子发射光谱法测定烧结除尘灰中9种元素[J]. 冶金分析, 2020, 40(6): 75-80.
REN Ling-ling, TAN Sheng-nan, LI Jian-chao. Determination of nine elements in sintering dedusting ash by inductively coupled plasma atomic emission spectrometry after microwave digestion. , 2020, 40(6): 75-80.
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