粉煤灰硫酸化焙烧提取氧化铝的研究  

Study on Recovering Al from Flyash by Sulphatation Calcining

作　　者：范艳青[1] 蒋训雄[1] 汪胜东[1] 冯林永[1] 蒋伟[1] 

机构地区：[1]北京矿冶研究总院,北京100044

出　　处：《铜业工程》2010年第2期34-38,33,共6页Copper Engineering

基　　金：863计划(2007AA06Z128)

摘　　要：研究了粉煤灰硫酸化焙烧提取氧化铝的工艺。对焙烧温度、时间、酸矿比、粒度等影响因素进行了研究,确定最佳工艺条件:粉煤灰粒度为-400目占95%以上,焙烧温度320℃,时间2h,酸矿比1.6,在此条件下粉煤灰中氧化铝浸出率可达87%,且硫酸试剂通过再生实现循环利用。通过XRD和扫描电镜对酸焙烧过程中粉煤灰的物相变化进行了研究。The extraction alumina process is studied from fly-ash by sulphatation calcining.The factors are studied such as temperature,time,acid-to-mine ratio,and size etc,and the optimum conditions are obtained： particle size-400 mesh（more than 95%）,calcination temperature 320 ℃,time 2h,acid-to-mine ratio 1.6.Under the condition,the leached alumina in flyash is up to 87%,and sulfuric acid is reused by regeneration technology.Characterizing by XRD and scanning electron microscopy,the change of phase is studied in roasting process.

关 键 词：粉煤灰 硫酸 浸出 铝 

分 类 号：TF821[冶金工程—有色金属冶金]