石棉尾渣和粉煤灰制备堇青石多孔陶瓷及其理化性能  

Preparation and Physicochemical Properties of Porous Cordierite Ceramics from Asbestos Tailings and Fly Ash

作　　者：王璨 彭同江[1,2,3] 孙红娟 陈涛[1,2] 李湘 WANG Can;PENG Tongjiang;SUN Hongjuan;CHEN Tao;LI Xiang(Key Laboratory of Solid Waste Treatment and Resource Recycle,Ministry of Education,Southwest University of Science and Technology,Mianyang 621010,China;Institute of Mineral Materials and Application,Southwest University of Science and Technology,Mianyang 621010,China;Analysis and Testing Center,Southwest University of Science and Technology,Mianyang 621010,China)

机构地区：[1]西南科技大学固体废物处理与资源化教育部重点实验室,绵阳621010 [2]西南科技大学矿物材料及应用研究所,绵阳621010 [3]西南科技大学分析测试中心,绵阳621010

出　　处：《硅酸盐通报》2023年第1期151-161,共11页Bulletin of the Chinese Ceramic Society

基　　金：四川省级知识产权专项资金项目(2022-ZS-00031)。

摘　　要：低成本制备堇青石多孔陶瓷一直是专家学者们研究的热点,本文以石棉尾渣、粉煤灰、高岭土为原料,在不添加发泡剂的情况下,采用直接烧结法成功制备了堇青石多孔陶瓷,系统研究了堇青石多孔陶瓷的物相演化、显微结构及理化性能。结果表明:烧结温度的升高和配方中高岭土含量的增加有助于样品中堇青石的合成,高岭土的添加可以有效降低样品发泡的温度和提高样品的孔隙率;当烧结温度为1240℃,焙烧后的石棉尾渣、焙烧后的粉煤灰和高岭土质量比为5∶5∶3时,制备的堇青石多孔陶瓷的体积密度仅为0.6 g/cm 3,孔隙率高达76.94%;当烧结温度为1220℃,焙烧后的石棉尾渣、焙烧后的粉煤灰和高岭土质量比为5∶5∶5时,制备的堇青石多孔陶瓷吸水率达到最大值34.57%;此外,制备的堇青石多孔陶瓷还表现出良好的耐碱性能。The low-cost preparation approach of porous cordierite ceramics has always been a research hotspot for experts and scholars.In this study,taking asbestos tailings,fly ash and kaolin as raw materials,porous cordierite ceramics were successfully prepared by direct sintering method without adding foaming agent.The phase evolution,microstructure and physicochemical properties of porous cordierite ceramics were systematically studied.The results show that the increase of sintering temperature and the amount of kaolin contribute to the synthesis of cordierite,and the addition of kaolin can effectively reduce the foaming temperature and increase the porosity of samples.When the calcination temperature is 1240℃and the mass ratio of roasted asbestos tailings,roasted fly ash and kaolin is 5∶5∶3,the bulk density of porous cordierite ceramics is only 0.6 g/cm 3,and the porosity reaches the maximum value of 76.94%.When the calcination temperature is 1220℃and the mass ratio of roasted asbestos tailings,roasted fly ash and kaolin is 5∶5∶5,the water absorption of porous cordierite ceramics reaches the maximum value of 34.57%.In addition,the porous cordierite ceramics show the good alkali resistance.

关 键 词：堇青石 多孔陶瓷 自发泡 石棉尾渣 粉煤灰 高岭土 

分 类 号：X754[环境科学与工程—环境工程]