Abstract：Quantificational analysis method for the non-crystalline and crystalline contents in blast furnace slag was studied by means of X-ray diffraction. The process of quantificational analysis method includes standard samples preparation, samples preparation, X-ray diffraction measurement and data treatment. The data treatment includes integration areas of non-crystalline curve and crystalline peaks in certain diffraction angle range, linear fitting and quantificational coefficient determination. The preparation methods of standard samples for X-ray diffraction of blast furnace slag were proposed, including 100% crystalline sample and 100% non-crystalline sample. The 100% crystalline sample can be obtained by heating blast furnace slag for 12 h at 1 000-1 200 ℃, and the 100% non-crystalline sample can be obtained by quenching the molten slag with enough water. The X-ray diffraction method of quantificational analysis of non-crystalline content in blast furnace slag was proposed with the 100% non-crystalline and 100% crystalline standard samples, and the quantificational coefficient can be obtained by linear regression on the integration areas of non-crystalline curve and crystalline peaks of X-ray diffraction in the 2-theta range 20°-40°. This method is suitable for the blast furnace slag with the non-crystalline content over 80%. The non-crystalline and crystalline contents of original blast furnace slag are obtained by combining the X-ray diffraction results and mathematical treatment, and this method is suitable for the blast furnace slag with the non-crystalline content over 90%, whose process includes preparing the 100% crystalline standard sample by heating blast furnace slag for 12 h at 1 000-1 200 ℃, samples preparation with the 0.02 interval in the 0-0.1 mass ratio range of 100% crystalline to original slag, X-ray diffraction measurement of the samples prepared and data treatment using iterative linear regression. The quantificational analysis method for blast furnace slag can be applied to various kinds of blast furnace slag from different steel plants.
Key words：Blast furnace slag;Quantificational analysis;X-ray diffraction;Dry granulation of BF slag
严定鎏,郭培民*,齐渊洪,张春霞,王海风,戴晓天. 高炉渣非晶态含量的定量分析方法研究[J]. 光谱学与光谱分析, 2008, 28(02): 463-467.
YAN Ding-liu, GUO Pei-min*,QI Yuan-hong, ZHANG Chun-xia, WANG Hai-feng, DAI Xiao-tian. Study on Quantificational Analysis Method for the Non-Crystalline Content in Blast Furnace Slag. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2008, 28(02): 463-467.
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