过滤用镁渣多孔陶瓷的制备与渗透性能

Preparation and Permeation Properties of Magnesium Slag Based Porous Ceramics Used for Filtration

本文以镁渣,粉煤灰等为原料制备了镁渣基多孔陶瓷,评价了多孔陶瓷的孔隙参数,烧结性能,力学性能,渗透性能等,观察了多孔陶瓷的微观结构,研究了烧结温度、成型压力、原料配比和添加剂等因素等对多孔陶瓷理化性能的影响。结果表明,烧结温度1150℃,保温4 h可制得固废掺比为90%的镁渣基多孔陶瓷,成型压力对多孔陶瓷的气孔率、吸水率和体积密度具有较大影响。镁渣和粉煤灰的配比为7∶2时,多孔陶瓷产品的综合性能较好。添加电石渣和碳粉为造孔剂能够匀化气孔分布,细化孔径,提高多孔陶瓷的气孔率和气体过滤性能。

The porous ceramics were prepared using magnesium slag and flyash as raw materials.The porosity parameters,properties of sintering,mechanical and permeation were studied and the microstructure of the porous ceramics was observed.The influence of sintering temperature,molding pressure,ratio of the raw material,and additives on the properties of the porous ceramics were studied.The results show that the magnesium based porous ceramics with90%solid waste could be prepared after holding for4h at1150Tl.The molding pressure affect the porosity,water absorption,and density of the porous ceramics strongly.With the ratio of magnesium slag and flyash equaled to7?2,the combination property of the porous ceramics is the best.The adding of carbide slag and carbon powder is able to homogenize distribution of the pore,refine diameter of the pore,and increase the porosity and the properties of gas filtration of the porous ceramics.