1. Shandong Entry-exit Inspection and Quarantine Bureau, Qingdao 266001, China; 2. The Fourth Exploration Institute of Geology and Mineral Resources of Shandong Province, Weifang 261041, China; 3. Fangchenggang Entry-exit Inspection and Quarantine Bureau, Fangchenggang 538001, China
Abstract：The iron ore (pellet ore), oxidized scale and residue of direct reduction iron can be all used as iron-smelting raw materials. The correct identification of these materials is very important to ensure the normal trade. A batch of Libya iron ore powder imported from Shandong customs was taken as the example to elaborate the identification method of these solid wastes. The appearance of goods was greatly different from the conventional iron ore powder. It contained chippings and pellets. According to the difference of particle size, five analytical samples with different particle size were prepared by sorting and classifying. The content of components in five samples was determined by wet analysis methods such as inductively coupled plasmas atomic emission spectrometry (ICP-AES). The phases were identified using X-ray diffractometer (XRD). The typical composition range of imported iron ore and oxidized scale in recent years as well as the process of direct reduction iron were referenced. According to the comprehensive characteristic analyses of samples including appearance, physical and chemical properties, it could be concluded that this sample mainly contained iron ore and accompanied with the residue of direct reduction iron and without solid wastes of inclusions. This study provided scientific basis for the importation supervision.
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