微波改性高炉瓦斯泥吸附特性研究

以马鞍山钢铁公司高炉瓦斯泥为对象,采用微波改性方法对高炉瓦斯泥的粒度分布、微观形貌及化学变化进行表征分析,揭示了微波作用对瓦斯泥吸附特性的影响.结果表明,高炉瓦斯泥的主要组分为含铁烧结矿和焦炭颗粒,经微波改性的瓦斯泥颗粒,在形貌上显示出粗糙度增大,孔隙结构明显,比表面积增大和活性点增多的特征.通过对亚甲基蓝的吸附测试,...

Absorption capacity of microwave-modified blast furnace sludge

Effects of microwave process on the absorbability of blast furnace sludge and their adsorption mechanism were studied. Particle size distributions, micro-morphology and chemical changes were analyzed by using laser particle size analyzer and scanning electron microscope (SEM). The results show that the morphology features of iron bearing sinter and coke particles, which are the main constituents of the blast furnace sludge, are changed by microwave heating. So that the surface roughness and porosity, specific surface area and activated points on the modified particle surface all increase obviously. The adsorption capacity (mg•g-1) for methylene blue increased from 54.8 mg•g-1 to 76.7 mg•g-1 after microwave modification. The increase of the absorbability for blast furnace sludge is mainly derived from decomposition of the mineral phase of the particles to form some new materials due to their different absorbency to microwave. The work provides some theoretical reference for improving the absorbability of the blast furnace sludge. Furthermore, it is helpful for recovery of valuable constituent in blast furnace sludge.