煤矸石/黄土基陶瓷膜支撑体的制备及烧结特性
Preparation and sintering characteristics of coal gangue/loess-based ceramic membrane support
吴魁 1同帜 2陈维星 2王琳涵 2李苗雨 2李大川3
作者信息
- 1. 陕西省现代建筑设计研究院,陕西西安 710000
- 2. 西安工程大学环境与化学工程学院,陕西西安 710048
- 3. 陕西科控技术产业研究院有限公司,陕西西安 710077
- 折叠
摘要
为了解决陶瓷膜成本过高的问题,以煤矸石和黄土为原料,CaCO3为造孔剂,羧甲基纤维素(CMC)为黏结剂制备煤矸石/黄土基陶瓷膜支撑体,利用扫描电镜(SEM)、X射线衍射(XRD)及压汞法等方法对陶瓷膜支撑体的物化性质、表面微观形貌、物相组成等进行表征.结果表明:随着烧结温度的升高,支撑体内部形成新的晶相,导致支撑体的纯水通量和抗折强度增加.同时,随着保温时间的延长,颗粒熔融现象更加显著,进而降低支撑体的纯水通量但增加其抗折强度.在烧结温度为1 125 ℃、保温时间为2 h条件下,制得的煤矸石/黄土基陶瓷膜支撑体综合性能较好.此时支撑体的纯水通量为9 102.44 L/(m2·h·MPa),抗折强度为12.317 MPa,酸/碱质量损失率分别为6.64％/0.35％,显气孔率为38.26％,孔隙率为49％.
Abstract
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％.
关键词
煤矸石/陶瓷膜支撑体/烧结温度/保温时间Key words
coal gangue/ceramic membrane support/sintering temperature/holding time引用本文复制引用
基金项目
陕西省科技厅重点研发一般项目(2020SF-410)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据