城市水处理污泥陶粒的制备与性能表征  

Preparation and Characterization of Keramzite Using Sewage Sludge from Municipal Sewage Treatment Plant

作　　者：陈伟[1] 樊传刚[1] 王健[1,2] 裴立宅[1] 

机构地区：[1]安徽工业大学材料科学与工程学院,安徽马鞍山243002 [2]马鞍山市华骐环保科技发展有限公司,安徽马鞍山243000

出　　处：《安徽工业大学学报（自然科学版）》2011年第1期19-22,共4页Journal of Anhui University of Technology（Natural Science）

基　　金：安徽省科技计划项目(09020303103);安徽省教育厅自然科学基金重点项目(KJ2010A340)

摘　　要：以城市污水处理厂的湿态剩余污泥为主原料,辅以集料尾泥(主要成分为粘土)和粉煤灰配料,在模拟实际加工工况的条件下制备烧结污泥陶粒样品,对其性能进行表征。研究结果表明以湿态污泥为主原料,经1040℃的短时烧结可获得烧胀陶粒。还发现少量(质量分数为10%)污泥的加入虽不起烧胀作用,但有明显的助烧结作用。相对于无污泥样品,陶粒样品的筒压强度有显著提高。当陶粒坯体中污泥质量分数为50%、粉煤灰质量分数为25%、集料尾泥质量分数为25%时,在1040℃烧结后的污泥陶粒样品具有较为理想的轻集料性能:堆积密度为0.76g/cm3;盐酸可溶率为1.86%;筒压强度为5.2 MPa。The lightweight keramzite was prepared using sewage sludge from municipal sewage treatment plant with the gangue sludge and fly ash as aids.The fabrication process simulated the practical manufacturing in the factory,and the properties of the keramzite samples were characterized.The results indicated that bloating keramzite could be prepared at 1 040℃with short stay time.Although the addition of 10%sludge didn＇t benefit bloating but it improved the sintering behavior of the sample and therefore enhanced the cylindrical compress strength.When the green sample comprised of 50%sewage sludge,25%fly ash,and 25%gangue sludge,the prepared keramzite had a granule density of 0.76 g/cm^3,a weight loss in hydrochloric acid of 1.86%,and a cylindrical compress strength of 5.2 MPa,respectively.

关 键 词：水处理剩余污泥 集料尾泥 陶粒 

分 类 号：X705[环境科学与工程—环境工程]