硫酸铵/硫酸体系对不同类型粉煤灰铝提取的影响  

Effects of ammonium sulfate/sulfuric acid system on Al2O3 extraction of different fly ashes

作　　者：辛海霞 徐玉君 崔富晖 吴艳 林捷 任杭 牟文宁 翟玉春 XIN Haixia;XU Yujun;CUI Fuhui;WU Yan;LIN Jie;REN Hang;MU Wenning;ZHAI Yuchun(School of Resources and Materials,Northeastern University at Qinhuangdao,Qinhuangdao 066004,China;Key Laboratory of Clean Conversion and Efficient Utilization to Resource in Qinhuangdao,Qinhuangdao 066004,China;School of Metallurgy and Environment,Central South University,Changsha 410083,China;College of Metallurgy,Northeastern University,Shenyang 110819,China;School of Materials Science and Engineering,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]东北大学秦皇岛分校资源与材料学院,河北秦皇岛,066004 [2]秦皇岛市资源清洁转化与高效利用重点实验室,河北秦皇岛066004 [3]中南大学冶金与环境学院,湖南长沙410083 [4]东北大学冶金学院,辽宁沈阳110819 [5]哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨150001

出　　处：《中南大学学报（自然科学版）》2020年第1期8-13,共6页Journal of Central South University:Science and Technology

基　　金：中央高校基本科研业务专项资金资助项目(N172304045,N182304020,N182304016);河北省自然科学基金资助项目(E2017501073)~~

摘　　要：以内蒙古某电厂2种不同类型粉煤灰为研究对象,采用硫酸铵/硫酸混合体系焙烧粉煤灰提取其中的铝,在分析粉煤灰成分和物相的基础上,研究焙烧温度、焙烧时间、物料配比对2种粉煤灰中铝提取率的影响。通过X线衍射和扫描电镜分析,对熟料溶出渣的物相和形貌进行表征。研究结果表明:硫酸铵/硫酸体系对不同类型粉煤灰中铝的提取影响差异较大,在焙烧温度为450℃、焙烧时间为2.0 h、硫酸铵和硫酸加入质量为理论质量2倍的条件下,疏松多孔型粉煤灰和光滑致密型粉煤灰的铝提取率分别为98%和67%。Two different types of fly ashes in Inner Mongolia were studied.Aluminum was extracted from fly ashes fired in ammonium sulfate/sulfuric acid mixture system.Based on the analysis of composition and phase of fly ash,the exaction of Al2O3 was studied.The mixture of fly ash and ammonium bisulfate/sulfuric acid was roasted at different temperatures,time and the ratios of the materials.The phase structure and microstructure of clinker and slag were characterized by X-ray diffraction(XRD)and scanning electron microscopy(SEM).The results show that the influence of ammonium sulfate/sulfuric acid system on the extraction of aluminum in different types of fly ashes is quite different.When the practics mass to theory mass of ammonium bisulfate/sulfuric acid is 2 times,the extraction ratio of aluminum of loose porous fly ash and compact fly ash is 98%and 67%respectively at 450℃for 2.0 h.

关 键 词：粉煤灰 焙烧 提取 物相组成 

分 类 号：TF111.12[冶金工程—冶金物理化学]