Discussion on identification of solid waste property of one imported “iron ore sinter”
LÜ Xiaohua1, ZHANG Xulong 2, ZHANG Jinlong*1, ZHANG Qingjian3 HU Xiaoxia1, WANG Ting1
1. Urumqi Customs Technology Center,Urumqi 830063,China; 2. Science and Technology Research Center of China Customs,Beijing 100026,China; 3. School of Environment and Municipal Engineering, Qingdao University of Technology,Qingdao 266520,China
Abstract：A general method for identifying the properties of solid waste minerals was established for a specific imported “iron ore sinter”.X-ray fluorescence spectrometry (XRF),X-ray diffraction (XRD),mineral liberation analyzer(MLA) and scanning electron microscopy-X-ray energy dispersive analysis (SEM-EDS) were used to analyze the appearance,microscopic morphology,phase composition and chemical composition of the target sample.The discussion was focused on whether this sample belonged to solid waste or not.The results showed that the main phases of the sample were magnetite,hematite,pyroxene and bassanite.Moreover,it also contained a small amount of chalcopyrite,matte,covellite,sphalerite,franklinite and quartz,as well as a small amount of glassy potassium-sodium-aluminum silicate minerals(leucosphenite), calcium-iron-aluminum-silicates(melilite),fayalite and zincate/ferrate.Some silicates showed loose gel-like structure,while some hematite ores exhibited solid-melt texture.The sample contained the substances produced in pyrometallurgical process.The components and microstructure of the sample were significantly different from the iron ore sinter obtained from the sintering processes of natural iron ore.The sample had the characteristics of mixture containing the products from pyrometallurgical process.Through the comprehensive analysis,this sample should be from the by-products in the manufacturing process of iron-containing materials,and its characteristics did not meet quality standards required for iron sinter.Therefore, based on GB 34330-2017 General Rules for Identification Standards for Solid Waste Properties, the sample could be identified as the solid waste.
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