电厂余热蒸汽粉碎Ⅲ级粉煤灰的研究  

Supersonic Grinding Class Ⅲ Fly Ash by Residual Steam of Power Plant

作　　者：舒朗[1] 卢忠远[1] 严云[1] 乔欢欢[1] 余博[2] 安金鹏[2] 

机构地区：[1]西南科技大学材料科学与工程学院,四川绵阳621002 [2]西南科技大学环境与资源学院,四川绵阳621002

出　　处：《中国粉体技术》2008年第3期32-35,共4页China Powder Science and Technology

基　　金：国家"十一五"支撑项目;编号:2006BAF02A24

摘　　要：介绍了以余热蒸汽为动力的超微粉碎技术。该技术利用超音速蒸汽加速粉煤灰颗粒,使其相互碰撞并粉碎。通过对设备工况的调节,能高效、廉价地制备各种微米尺度的粉煤灰超微粉体。粒度分析和SEM图像显示,粉碎后粉煤灰平均粒度细,粒度分布较窄,能有效地保护粉煤灰颗粒的球状结构。在砂浆中应用结果表明,细化后的Ⅲ级粉煤灰具有较高的火山灰活性,并具有一定的减水作用,d50为10μm左右磨细灰具有最佳的减水效果。The process of improveing pozzolanic activity of the class Ⅲ fly ash via superfine grinding powered by residual steam was introduced. This technology crushed the fly ash by accelerate particle with supersonic steam. Through adjusting the regime, the superfine fly ash in micron scale was prepocced high-efficiently and low-costly. The granularity distribution, SEM images showed that the fly ash powder was uniform distributed, and the spheroidal structure of fly ash was reserved. The application in mortar showed that the ground fly ash with high pozzolanic activity reduced water requirement. The particle size of optimal water reducing effect was about 10 μm.

关 键 词：粉煤灰 超音速蒸汽粉碎 火山灰活性 砂浆 

分 类 号：TU521.4[建筑科学—建筑技术科学]