干法脱硫粉煤灰物化性能及用于建材的安全性研究  

Research on physical and chemical properties and safety of dry desulphurized fly ash used as a construction material

作　　者：顾文飞[1] 唐欧靖[1] 康明[1] 周维[1] 

机构地区：[1]宝钢发展有限公司,上海201900

出　　处：《宝钢技术》2012年第2期31-35,共5页Baosteel Technology

摘　　要：对宝钢电厂干法脱硫粉煤灰的物化性能和安定性进行了系统的试验研究,并与国内相似电厂干法脱硫产物进行对比,分析其在建材中应用的可行性。研究结果表明,宝钢干法脱硫粉煤灰是一种高钙高硫型灰渣,具有火山灰活性特征,含有硫酸盐、亚硫酸盐成分,易形成硫酸盐激发,其强度活性高于普通粉煤灰。但过高的亚硫酸钙和游离氧化钙会存在一定的安定性隐患,因此在建材中应用时需进行质量检测和掺量控制。The physical and chemical properties and soundness of Baosteel Power Plant＇s dry desulphurized fly ash were systematically investigated and compared with those of the same byproduct produced by the other domestic power plants.The feasibility of the byproduct used as a construction material was also analyzed.The results show that Baosteel＇s dry desulphurized fly ash is a kind of ash with high calcium and high sulfur content,which features activity of volcanic ash.It contains sulfate and sulfite,and is easy to cause sulfate activation.It has higher activity compared with common fly ash.But higher calcium sulfite and free-CaO in ash would bring about soundness concerns to users,therefore,quality tests and quantity control would be necessary when fly ash is used as a construction material.

关 键 词：干法脱硫粉煤灰 亚硫酸钙 活性 安定性 自由膨胀率 

分 类 号：X701.3[环境科学与工程—环境工程]