Abstract：The composition of slag iron is complex and the content of iron is high. The elements including iron, calcium and magnesium in slag iron have recycling value. However, silicon, aluminum and phosphorus have a certain influence on the recycling, and the content of these elements is an important parameter for recycling and reuse of slag iron. The contents of total iron, silicon oxide, calcium oxide, magnesium oxide, aluminum oxide and phosphorus in slag iron were determined by X-ray fluorescence spectrometry (XRF) with fusion sample preparation. It solved the problems of traditional methods such as time-consuming, long procedures and the pollution of environment. Moreover, the detection efficiency was improved. The slag iron samples were pre-heated at 1000℃ for 1h to remove the moisture, carbon and other volatile components. Meanwhile, the reducing substances were oxidized. Then lithium tetraborate was used as the flux to mix with the burned sample at a dilution ratio of 1∶10. The mixture was pre-melted at 800℃ for 2min followed by melting at 1150℃ for 12min to prepare the uniform glass melt. The calibration curves were established with 13 standard samples with different composition and similar components to the slag iron. The instrument parameters were optimized. The rapid determination method of total iron, silicon oxide, calcium oxide, magnesium oxide, aluminum oxide and phosphorus in slag iron by X-ray fluorescence spectrometry was established. The accuracy tests were conducted using standard samples including open-hearth furnace slag YSBC13838-96, converter slag QD12-183 and vanadium slag YSBC19809-2000. The results showed that the relative standard deviations (RSD, n=7) of determination results of total iron, silicon oxide, calcium oxide, magnesium oxide, aluminum oxide and phosphorus were 0.22%-4.2%. The found results were consistent with the certified values. The determination results of actual slag iron sample were consistent with those obtained by national standard method, which could meet the daily quality control requirements of the laboratory.
牟英华, 胡维铸, 张鲁宁, 孟宪涛, 王伟. 熔融制样-X射线荧光光谱法测定渣铁中主次成分[J]. 冶金分析, 2020, 40(5): 15-19.
MU Ying-hua, HU Wei-zhu, ZHANG Lu-ning, MENG Xian-tao, WANG Wei. Determination of major and minor components in slag iron by X-ray fluorescence spectrometry with fusion sample preparation. , 2020, 40(5): 15-19.
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