华东理工大学学报：自然科学版2011，Vol.37Issue(5)：577-581,5.
F型粉煤灰氧化铝提取潜力
Alumina Extraction Potential of Class-F Coal Fly Ash
摘要
Abstract
Four representative types of class-F coal fly ash（CFA） including low calcium contained ash（FCFA）,high calcium contained ash（CCFA）,high alumina contained ash（ACFA） and high loss on ignition ash（LCFA） were selected to investigate chemical compositions,phase components and chemical reactivity,causes of alumina extraction varieties and a novel method for elevating alumina extraction from CFA using the measurements such as XRF,XRD and hydrochloride acid extraction.The results showed that mullite and quartz were major minerals in FCFA,quartz and lime in CCFA,mullite in ACFA and amorphous phases in LCFA.The alumina content in CCFA and LCFA mainly presented in the amorphous phase and 47.62% and 79.13% of Al2O3 could be directly extracted using hydrochloride acid.The Al2O3 extraction from CCFA and LCFA sintered at 900 ℃ for 1 h increased largely due to the formation of anorthite.Anorthite was formed in FCFA and ACFA sintered at 900 ℃ for 1 h after the addition of calcium additive and the Al2O3 extraction increased to 85.31% and 70.22% correspondingly.关键词
粉煤灰/莫来石/钙长石/氧化铝Key words
coal fly ash/mullite/anorthite/alumina分类
天文与地球科学引用本文复制引用
周华梅,乔秀臣,于建国..F型粉煤灰氧化铝提取潜力[J].华东理工大学学报：自然科学版,2011,37(5):577-581,5.基金项目
国家高技术研究发展（863）计划 （）
上海浦江计划 （）
