粉煤灰提取二氧化硅技术及工业化发展现状  

Progress of research and industrialization of extraction technologies of SiO_2 from fly ash

作　　者：李晓光 丁书强[1] 卓锦德 曾宇平 王珂[2] 马宁 Li Xiaoguang;Ding Shuqiang;Jow Jinder;Zeng Yuping;Wang Ke;Ma Ning(Advanced Materials and Analysis Center,National Institute of Clean-and-Low-Carbon Energy(NICE),Beijing102211,China;State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences)

机构地区：[1]北京低碳清洁能源研究所,先进材料与分析测试中心,北京102211 [2]中国科学院上海硅酸盐研究所,高性能陶瓷和超微结构国家重点实验室

出　　处：《无机盐工业》2018年第12期1-4,共4页Inorganic Chemicals Industry

摘　　要：粉煤灰是燃煤电厂排放的工业固体废弃物。二氧化硅是粉煤灰中的主要氧化物,其含量可高达60%(质量分数)。以粉煤灰为硅源制备高附加值的硅产品是实现粉煤灰资源化、高值化利用的重要方向。基于粉煤灰提铝工艺,归纳总结了3种主要的粉煤灰提取二氧化硅方法(碱熔-酸浸法、碱溶-酸浸法、酸溶-碱浸法)的研究进展及优缺点,以期为后续开发制备粉煤灰基硅产品提供科学依据。在此基础上指出了粉煤灰提取二氧化硅的发展方向。Fly ash is a kind of industrial solid waste in coal fired power plants.Silicon is the main element in fly ash and its mass fraction of SiO2 can reach 60%.The extraction of SiO2 from fly ash is an important direction for its value added utilization.Based on the technology of Al2O3 extraction from fly ash,three main methods of extracting SiO2 from fly ash(alkali fusion acid leaching method,alkali dissolution acid leaching method and acid dissolution alkali leaching method)were reviewed and their advantages and disadvantages were summarized.It′s helpful for the utilization and preparation of SiO2 extraction from fly in future.Finally,the development of SiO2 extraction from fly ash was forecasted and some suggestions thereof were also put forward.

关 键 词：粉煤灰 二氧化硅提取技术 工业化现状 

分 类 号：TQ127.2[化学工程—无机化工]