Preparation and sintering characteristics of coal gangue/loess-based ceramic membrane support
To address the issue of high cost of ceramic membranes,this study utilized gangue and loess as the primary raw materials.CaCO3 was used as the pore-making agent,and carboxymeth-yl cellulose(CMC)was used as the binder to prepare a gangue/loess-based ceramic membrane support.The physical and chemical properties,surface micro-morphology,and phase composi-tion were characterized by SEM,XRD and pressed mercury method.The experimental results in-dicated that an increase in sintering temperature resulted in the formation of new crystalline pha-ses within the carrier.This led to an increase in both the pure water flux and flexural strength of the support body.Meanwhile,with the extension of the holding time,the particle melting phe-nomenon is more significant,leading to a decrease in pure water flux but an increase in the flexur-al strength of the carrier.The gangue/loess-based ceramic membrane carrier showed excellent o-verall performance under the condition of sintering at a temperature of 1 125 ℃ for 2 hours.The carrier showed a pure water flux of 9 102.44 L/(m2·h·MPa),a flexural strength of 12.317 MPa,an acid/base mass loss rate of 6.64％/0.35％,respectively,an apparent porosity of 38.26％and a porosity of 49％.
coal gangueceramic membrane supportsintering temperatureholding time
国家科技期刊平台
NSTL
万方数据
维普
