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Effect of sintering system on fly ash and loess ceramic membrane support

Authors： LV Xiangyu，GUO Yani，TONG Zhi，YANG Xiaoyu，LI Dachuan，GONG Liang，WANG Han

Units： 1.School of Environmental and Chemical Engineering,Xi’an Polytechnic University,Xi’an 710048,China; 2.Shaanxi Science and Technology Indusrtial Research Institute Co.Ltd,Xi’an 710077,China

KeyWords： Fly ash and loess ceramic membrane;supports;sintering temperature;holding time

ClassificationCode：X781.5

year,volume(issue):pagination： 2022,42(3):60-67

Abstract：

Using fly ash and Luochuan loess as aggregates, nano-TiO2 as single-phase sintering additives, and carboxymethyl cellulose (CMC) as binder, fly ash-loess-based ceramic membrane support was prepared by rolling molding and solid particle sintering. The effects of sintering temperature and holding time on the support were explored and analyzed. The thermal gravimetric analysis (TG-DTG), mercury intrusion method, self-made pure water flux measurement equipment, three-point bending method, X-ray diffraction (XRD), mass loss method and scanning electron microscopy (SEM) were used to characterize the apparent porosity, pure water flux, flexural strength, crystal phase change, acid resistance and alkaline corrosion resistance of fly ash-loess-based ceramic membrane. The results show that the support has the best comprehensive performance under the conditions of 5 % nano-TiO2 addition, sintering temperature of 1100 °C and holding time of 10 h. The pure water flux is 2382.56 L/(m2·h·MPa), the bending strength is 13.27 MPa, the apparent porosity is 34.58 %, and the acid / alkali corrosion resistance is 1.62 % / 0.71 %.

Funds：

陕西省科技厅重点研发计划—重点项目（2020ZDLNY06-09、2020SF-410、2020GY-325）

AuthorIntro：

吕相玉（1996-），女，陕西西安人，硕士研究生，主要从事环保新材料的应用研究，

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