Research on rapid identification of solid waste properties of imported iron ore based on X-ray diffraction fingerprint technology
Similarity,as a quantitative and qualitative parameter in digital signal science,has been identified as an important evaluation index in the standard of traditional Chinese medicine fingerprint by Chinese Pharmacopoeia Commission.In this article,similarity evaluation is introduced into the research on rapid i-dentification of solid waste properties of imported iron ore.First,X-ray diffraction(XRD)technology is used to establish XRD fingerprint for three groups of imported iron ores,each group consisting of 15 sam-ples,with appearances of yellow(Y),red(R),and dark brown(B).The XRD average reference spectra are calculated and plotted for each group.After extracting the common characteristic peaks,the similarity eval-uation is conducted using the correlation coefficient method and the cosine similarity method.The results show that the correlation coefficients between the XRD patterns of each group of 15 iron ore samples and their reference spectra are not less than 0.960 6,and the cosine of angle is not less than 0.980 0.The addi-tion of iron-containing solid waste(such as iron oxide scale,slag,and precipitator dust)can lead to a de-crease in similarity,with larger adulteration amounts resulting in greater differences between their XRD fingerprint patterns.This further helps to determine the threshold for solid waste identification,allowing for a direct discrimination of iron ores and iron-containing solid waste and their adulterants from quantita-tive data.The experimental results indicate that iron ore samples adulterated with 10％iron-containing sol-id waste can be effectively identified using this method,and it also demonstrates good rapid screening effects in the detection of actual samples.
X-ray diffraction(XRD)iron oresolid wasteidentificationsimilarity evaluationcorrelation co-efficientcosine of angle
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