Glass-ceramics were prepared using steelmaking industry waste containing high iron content based on powder sintering and crystallization method. Anthracite was used in varying amounts as the reducing agent to recover iron in raw materials. X-ray diffraction analysis (XRD), Fourier Transform Infrared Spectroscopy (FTIR), and Scanning Electron Microscope (SEM) coupled with Energy Dispersive X-ray spectrometer (EDX) were used to study the microstructure of glass-ceramics formed. Bending strength and micro-harness of the samples were compared.;When 12g of anthracite was used, ionic iron (Fe2+/Fe 3+) content was reduced to 4.7% and total iron content was reduced to 8.0% in parent glass. The main crystalline phases formed were diopside and augite. Crystalline phases were well-distributed ranging between 0.2 to 0.4 microm after crystallization. A maximum bending strength of 91MPa and a maximum micro-hardness of 3466MPa were achieved.;Effect of Al2O3 content on glass-ceramics was studied. Both average bending strength and average micro-hardness of glass-ceramics with 15% Al2O3 content were higher than the glass-ceramics with 6% Al2O3 content.;Blast furnace dust was used as both a reducing agent to recover iron and a raw material to prepare glass-ceramics. Compared with glass-ceramics using anthracite as the reducing agent, average bending strength of glass-ceramics formed using BF dust was lower, while average micro-hardness was higher.
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机译:利用粉末烧结和结晶法,利用含铁量高的炼钢工业废料制备了微晶玻璃。无烟煤以不同的量用作还原剂,以回收原料中的铁。 X射线衍射分析(XRD),傅立叶变换红外光谱(FTIR)和扫描电子显微镜(SEM)结合能量色散X射线光谱仪(EDX)被用于研究所形成的玻璃陶瓷的微观结构。比较了样品的弯曲强度和微线束。当使用12g无烟煤时,母玻璃中的离子铁(Fe2 + / Fe 3+)含量降低到4.7%,总铁含量降低到8.0%。形成的主要结晶相是透辉石和辉石。结晶后结晶相分布良好,介于0.2至0.4微米之间。达到最大抗弯强度91MPa,最大显微硬度3466MPa。研究了Al2O3含量对微晶玻璃的影响。 Al2O3含量为15%的玻璃陶瓷的平均弯曲强度和平均显微硬度均高于Al2O3含量为6%的玻璃陶瓷。;高炉粉尘既用作还原剂,也用于回收铁和原料准备玻璃陶瓷。与使用无烟煤作为还原剂的玻璃陶瓷相比,使用高炉粉尘形成的玻璃陶瓷的平均弯曲强度较低,而平均显微硬度较高。
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