Abstract：X-ray fluorescence spectrometry (XRF), X-ray diffraction (XRD), metallographic microscope and laser particle size analysis were used to characterize three imported iron-containing solid materials, including the main components and its mass fraction, phase composition and particle size distribution, the appearance features such as color and particle size, the proportion of materials with different particle sizes, etc. The possible source of imported iron-containing materials was analyzed by comparison with literatures or the quality standards of related products. It could be identified that the materials were products that were consciously produced and the quality satisfied the national or international standards, or by-products (waste products or residues), or residues produced by pollution control facilities. According to the judgment principles of Identification Guidance of Solid Wastes (tentative), the comprehensive characterization conclusions of solid wastes could be obtained. The three above iron-containing materials were iron ore pellet, pyrite cinder and high iron dust of electric steelmaking, respectively. The latter two materials were solid wastes that were prohibited to be imported in China. The study provided reference for the comprehensive characterization and supervision of imported iron-containing solid wastes. It had important significance to block the iron-containing solid wastes outside the gateway of our country.
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