高铝粉煤灰预脱硅同步降低碱含量  

Synchronous Reduction of Alkali Content in High Alumina Fly Ash by Pre-desilication

作　　者：公彦兵 孙俊民 张生 张战军 杨会宾 王勇 王娜 

机构地区：[1]大唐国际高铝煤炭资源开发利用研发中心,呼和浩特010050

出　　处：《有色金属（冶炼部分）》2014年第5期21-25,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：国家"十一五"科技支撑计划项目(2009BAB49B00)

摘　　要：研究了高铝粉煤灰预脱硅同步降低碱含量的规律及控制机理。结果表明,在温度90℃、氧化钠浓度120g/L、反应时间2.5h、液固比3∶1的最佳条件下,脱硅灰中化学碱氧化钠含量为2.8%,铝硅比由1.30提高到2.12,氧化硅溶出率39.4%,氧化铝溶出率0.6%,实现了高铝粉煤灰预脱硅后碱含量最低且预脱硅效率最大化。：The regulation rules and controlling mechanism of synchronous reduction of alkali content in high alumina fly ash by pre-desilication were studied. The results show that sodium oxide content of high alumi- num fly ash after desilication is 2.8%, alumina-silica ratio rises from 1.3 to 2.12, silicon oxide leaching rate is 39.4%, and alumina leaching rate is 0.6% under the optimum conditions including temperature of 90 ℃, Na20 concentration of 120 g/L, reaction time of 2.5 h, and ratio of liquid to solid of 3 ： 1. After desilication pretreatment, the lowest alkali content in high alumina fly ash and maximum desilication effi- ciency are achieved.

关 键 词：高铝粉煤灰 预脱硅 化学碱 铝硅比 

分 类 号：TF821[冶金工程—有色金属冶金]