正交试验优选循环流化床粉煤灰中氧化铝溶出工艺  

Optimization of alumina digestion process in CFB fly ash by orthogonal test

作　　者：李世春 池君洲 Li Shichun;Chi Junzhou(Research Center for Coal Associated Resources Comprehensive Utilization of China Energy Group,Erdos 010300,China)

机构地区：[1]国家能源集团煤炭伴生资源综合利用研究中心,内蒙古鄂尔多斯010300

出　　处：《轻金属》2022年第7期12-15,58,共5页Light Metals

基　　金：国家科技部“十二五”科技支撑计划项目(2011BAA04B05)。

摘　　要：粉煤灰中含有大量的硅、铝等元素,是一种综合利用价值较高的非铝土矿资源。本文以循环流化床粉煤灰为研究对象,用盐酸溶出氧化铝,采用正交试验方法,优选出了氧化铝溶出的最佳工艺条件。结果表明:当固液质量比为1∶4.5、溶出时间为150 min、溶出温度为160℃、搅拌速率为0.5转/分时,氧化铝溶出率M≥87.21%。The fly ash contains a large amount of silicon,aluminum and other elements,so it is a non-bauxite resource with high comprehensive utiliza-tion value.In this paper,the circulating fluidized bed(CFB)fly ash is taken as the research object,the alumina is digested with hydrochloric acid.The optimum process conditions of alumina digestion are optimized by orthogonal test.The results show that when the solid-liquid mass ratio is 1∶4.5,diges-tion time is 150 min,digestion temperature is 160℃and stirring speed is 0.5 r/min,the digestion rate of alumina M≥87.21%.

关 键 词：正交试验 粉煤灰 氧化铝 溶出率 

分 类 号：TF821[冶金工程—有色金属冶金] TQ133.1[化学工程—无机化工]