Synthesis of steel slag ceramics: chemical composition and crystalline phases of raw materials
来源期刊：International Journal of Minerals Metallurgy and Materials2015年第3期
论文作者：Li-hua Zhao Wei Wei Hao Bai Xu Zhang Da-qiang Cang
文章页码：325 - 333
摘 要：Two types of porcelain tiles with steel slag as the main raw material（steel slag ceramics） were synthesized based on the CaO–Al2O3–SiO2 and CaO –MgO –SiO2 systems, and their bending strengths up to 53.47 MPa and 99.84 MPa, respectively, were obtained. The presence of anorthite, α-quartz, magnetite, and pyroxene crystals（augite and diopside） in the steel slag ceramics were very different from the composition of traditional ceramics. X-ray diffraction（XRD） and electron probe X-ray microanalysis（EPMA） results illustrated that the addition of steel slag reduced the temperature of extensive liquid generation and further decreased the firing temperature. The considerable contents of glass-modifying oxide liquids with rather low viscosities at high temperature in the steel slag ceramic adobes promoted element diffusion and crystallization. The results of this study demonstrated a new approach for extensive and effective recycling of steel slag.
Li-hua Zhao1,2，Wei Wei1,2，Hao Bai1,2，Xu Zhang1,2，Da-qiang Cang1,2
1. School of Metallurgical and Ecological Engineering, University of Science and Technology Beijing2. State Key Laboratory of Advanced Metallurgy, University of Science and Technology Beijing
摘 要：Two types of porcelain tiles with steel slag as the main raw material（steel slag ceramics） were synthesized based on the CaO–Al2O3–SiO2 and CaO –MgO –SiO2 systems, and their bending strengths up to 53.47 MPa and 99.84 MPa, respectively, were obtained. The presence of anorthite, α-quartz, magnetite, and pyroxene crystals（augite and diopside） in the steel slag ceramics were very different from the composition of traditional ceramics. X-ray diffraction（XRD） and electron probe X-ray microanalysis（EPMA） results illustrated that the addition of steel slag reduced the temperature of extensive liquid generation and further decreased the firing temperature. The considerable contents of glass-modifying oxide liquids with rather low viscosities at high temperature in the steel slag ceramic adobes promoted element diffusion and crystallization. The results of this study demonstrated a new approach for extensive and effective recycling of steel slag.
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