Abstract:
BACKGROUNDThe high content of potassium, sodium, zinc, and chlorine in dust ash significantly affects the stable operation of converter. To recycle the dust ash, it is necessary to accurately determine the contents of the components. Dust ash contains a broad range of potassium, sodium, zinc, and chlorine; therefore, the traditional X-ray fluorescence spectrometry (XRF) exceeds the range of the work curve.
OBJECTIVESTo develop a method for the determination of 14 components in the dust ash with a broad concentration range of potassium, sodium, zinc, and chlorine.
METHODSStandard reagents of potassium chloride, sodium chloride, and zinc oxide were added to commercially available iron ore standards in a quantitative manner to provide a new series of calibration samples with wide ranges of potassium, sodium, zinc, and chlorine contents. The 14 components in the dust ash were determined by XRF spectrometry with a powder-pelleting-lined boric acid preparation.
RESULTSThe measurement ranges of potassium, sodium, zinc, and chlorine were 1.36%-12.00%, 0.43%-6.85%, 0.24%-35.00%, and 0.25%-10.00%, respectively. The results of the 14 components in the dust ash were consistent with those of the traditional method, yielding a relative standard deviation of < 5.2% (n=7).
CONCLUSIONSXRF spectrometry with the powder-pelleting-lined boric acid preparation showed good accuracy and precision during the determination of 14 components in the dust ash.
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