磨细高炉矿渣
碱度
熔渣(焊接)
傅里叶变换红外光谱
化学
三元运算
冶金
材料科学
化学工程
水泥
有机化学
计算机科学
工程类
程序设计语言
作者
Lei Zhang,Jia Yang,Shu Hao,Xi Lu,Fengshan Bai,Qianyu Zhao,Tian De
标识
DOI:10.1016/j.jclepro.2021.126800
摘要
Blast furnace slag (BFS), a large amount of industrial solid waste, is currently used to make mainly concrete and building bricks. There is no doubt that it is a waste of rich elements and oxides in the slag. In order to increase the utilization and use value of BFS, this article prepared it as a denitration catalyst. The alkaline oxides CaO, MgO and the acidic oxides Al2O3, SiO2 were used to modify the ground granulated blast furnace slag (GGBS). And it investigated the effect of the modified GGBS and alkalinity on denitration performance. Combining X-Ray fluorescence (XRF), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and scanning electron microscope (SEM) characterization, the results showed that: Alkaline oxides modified GGBS had good denitration performance, which benefited from –OH generated during the modification process. While acidic oxides modified GGBS hardly improved the denitration performance, because the acidic oxides would absorb the f-CaO in the slag. According to the calculation formula of slag alkalinity, the quaternary, ternary and binary alkalinity of 9 wt% MgO modified GGBS were 0.901, 1.262 and 1.089 respectively, and the denitration performance of the modified GGBS improved with the increase of alkalinity.
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