碳酸钠活化粉煤灰提铝试验研究  

Experimental study on extracting aluminum from fly ash activated by sodium carbonate

作　　者：王允威[1] 陈康云 杨涛[1] 朱学军[1] WANG Yunwei;CHEN Kangyun;YANG Tao;ZHU Xuejun(School of Biological and Chemical Engineering,Panzhihua University,Panzhihua 617000,Sichuan,China)

机构地区：[1]攀枝花学院生物与化学工程学院,四川攀枝花617000

出　　处：《四川冶金》2024年第2期29-33,51,共6页Sichuan Metallurgy

基　　金：工业固态废弃物土木工程综合开发利用四川省高校重点实验项目(SC_FQWLY-2021-06);四川省钒钛材料工程技术研究中心(2021-FTGC-YB-07)。

摘　　要：以Na_(2)CO_(3)为活化助剂,与粉煤灰均匀混合后高温煅烧,使化学活性较低的莫来石转化为易溶于酸的霞石,经酸浸使活化粉煤灰中的Al_(2)O_(3)转移到酸溶液中,实现提取铝的目的。考察了粉煤灰与Na_(2)CO_(3)质量比、硫酸质量分数、酸浸液固比、酸浸温度、酸浸时间对Al_(2)O_(3)浸出率的影响。结果表明:当粉煤灰与Na_(2)CO_(3)质量比为1:0.3,硫酸质量分数为25%,酸浸温度为95℃,酸浸时间为2 h,酸浸液固比为6 mL/g时,Al_(2)O_(3)浸出率最高,其值可达95%。With sodium carbonate as activation agent,uniformly mixed with fly ash and calcined at high temperature,make the low chemical activity of mullite into nepheline of easily soluble in acid,after acid leaching,the Alz O,in activated fly ash is transferred to acid solution to achieve the purpose of extracting aluminum.The effects of mass ratio of fly ash and Na_(2)CO_(3),quality fraction of sulfuric acid,acid leaching liquid-solid ratio,acid leaching temperature and acid leaching time on Al,O:leaching rate were investigated.Results show that:When the mass ratio of fly ash and Naz CO is l:0.3,the mass fraction of sulfuric acid is 25%,the acid leaching temperature is 95℃,the acid leaching time is two hours,the acid leaching liquid-solid ratio of 6 mL/g,Al O,leaching rate is highest,its value can reach 95%.

关 键 词：粉煤灰 Na_(2)CO_(3) 硫酸 Al_(2)O_(3) 

分 类 号：TQ534[化学工程—煤化学工程]