过滤用镁渣多孔陶瓷的制备与渗透性能

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.

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

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 with 90%solid waste could be prepared after holding for 4 h at 1150℃.The molding pressure affect the porosity , water absorption , and density of the porous ceramics strongly .With the ratio of magnesium slag and flyash equaled to 7:2 , 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 .