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中南大学学报(自然科学版)

Journal of Central South University

第51卷    第1期    总第305期    2020年1月

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文章编号:1672-7207(2020)01-0008-06
硫酸铵/硫酸体系对不同类型粉煤灰铝提取的影响
辛海霞1, 2,徐玉君1,崔富晖3,吴艳4,林捷1,任杭5,牟文宁1, 2,翟玉春2, 4

(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
)

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%。

 

关键词: 粉煤灰;焙烧;提取;物相组成

Effects of ammonium sulfate/sulfuric acid system on Al2O3 extraction of different fly ashes
XIN Haixia1, 2, XU Yujun1, CUI Fuhui3, WU Yan4, LIN Jie1, REN Hang5, MU Wenning1, 2, ZHAI Yuchun2, 4

1. School of Resources and Materials, Northeastern University at Qinhuangdao, Qinhuangdao 066004, China;
2. Key Laboratory of Clean Conversion and Efficient Utilization to Resource in Qinhuangdao,Qinhuangdao 066004, China;
3. School of Metallurgy and Environment, Central South University, Changsha 410083, China;
4. College of Metallurgy, Northeastern University, Shenyang 110819, China;
5. School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

Abstract: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.

 

Key words: fly ash; roasting; extraction; phase composition

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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