硅酸铝纤维制备高温气体除尘材料的性能

The Performance of the High Temperature Dust Removal Material Prepared from Aluminum Silicate Fiber

采用真空抽滤并加热处理的方法制备硅酸铝纤维高温气体除尘材料,并通过扫描电子显微镜(SEM)、金相显微镜和压汞仪分别对材料的显微结构、纤维分散性、孔径大小和分布进行了分析。结果表明,在800℃并保温1h加热处理后,材料的抗折强度达到3.14MPa,过滤阻力为79.75Pa/m/min,孔直径在10～80μm的孔占总体积的70.23%,气孔率达到72.99%。硅酸铝纤维多孔陶瓷材料具有较高的抗折强度,孔隙率和较低的过滤阻力,可用于高温条件下粉尘颗粒的过滤。

High temperature dust removal material was prepared from aluminum silicate fibers by vacuum filtering and heat treatment. The microstructure, fiber dispersibility, pore size and pore size distribution of the as-prepared samples were analyzed by scanning electron microscope （SEM）, metallographic microscope and mercury intrusion porosimeter respectively. The results show that the flexural strength is 3.14 MPa, the filtration resistance is 79.75 Pa/m/min, the pore diameter is between 10 - 80 iJm, the total pore volume is 70.23%, and the porosity is 72.99%. The porous aluminum silicate ceramic fiber material with high flexural strength and porosity and low filtration resistance can be used to filter dust particles at high temperatures.