A novel process to enrich alumina and prepare silica nanoparticles from high-alumina fly ash | |
Liu, Chun-li1,2; Zheng, Shi-li1; Ma, Shu-hua1; Luo, Yang1; Ding, Jian1; Wang, Xiao-hui1; Zhang, Yi1 | |
刊名 | FUEL PROCESSING TECHNOLOGY |
2018-05-01 | |
卷号 | 173页码:40-47 |
关键词 | High-alumina Fly Ash Alumina Enrichment Ammonium Fluoride Activation Silica Nanoparticle |
ISSN号 | 0378-3820 |
DOI | 10.1016/j.fuproc.2018.01.007 |
文献子类 | Article |
英文摘要 | Extraction of alumina from high-alumina fly ash (HAFA) enhances the value-added utilization of HAFA. However, this industrial application has been restricted by the high silica content of HAFA. Thus, alumina enrichment via the separation of silica is a key technique for HAFA utilization. In this study, a novel method of alumina enrichment by ammonium fluoride activation was proposed. The influence of the ammonium fluoride to silica in HAFA molar ratio (F/Si), the calcination temperature, and calcination time on the alumina to silica mass ratio (Al/Si) of the calcined product were investigated. The results showed that the Al/Si ratio reached 8.83 when HAFA with a F/Si ratio of 5.0 was calcined at 850 degrees C for 60 min. Silica in HAFA was transformed into gaseous ammonium fluosilicate, which was separated from the calcined product by condensation, thereby increasing the Al/Si ratio. However, impurities in HAFA inhibited further improvement of the Al/Si ratio. Subsequently, dissolution of ammonium fluosilicate with a surfactant produced silica nanoparticles with a surface area of 454.2 m(2)/g and a recyclable ammonium fluoride solution through an ammonification process. Thus, this work provides a novel strategy for the high-value utilization of HAFA. |
WOS关键词 | Jungar Power-plant ; Extracting Alumina ; High-temperature ; Inner-mongolia ; China ; Fluoride ; Pretreatment ; Mineralogy ; Behavior ; Ores |
WOS研究方向 | Chemistry ; Energy & Fuels ; Engineering |
语种 | 英语 |
WOS记录号 | WOS:000429398400005 |
资助机构 | Major State Basic Research Development Program of China(2013CB632601) |
内容类型 | 期刊论文 |
源URL | [http://ir.ipe.ac.cn/handle/122111/24161] |
专题 | 过程工程研究所_湿法冶金清洁生产技术国家工程实验室 |
作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
推荐引用方式 GB/T 7714 | Liu, Chun-li,Zheng, Shi-li,Ma, Shu-hua,et al. A novel process to enrich alumina and prepare silica nanoparticles from high-alumina fly ash[J]. FUEL PROCESSING TECHNOLOGY,2018,173:40-47. |
APA | Liu, Chun-li.,Zheng, Shi-li.,Ma, Shu-hua.,Luo, Yang.,Ding, Jian.,...&Zhang, Yi.(2018).A novel process to enrich alumina and prepare silica nanoparticles from high-alumina fly ash.FUEL PROCESSING TECHNOLOGY,173,40-47. |
MLA | Liu, Chun-li,et al."A novel process to enrich alumina and prepare silica nanoparticles from high-alumina fly ash".FUEL PROCESSING TECHNOLOGY 173(2018):40-47. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论