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煅烧气氛对煤系高岭岩热活化的影响
司鹏,乔秀臣,于建国
作者单位E-mail
司鹏 华东理工大学 syppeng@mail.ecust.edu.cn 
乔秀臣 华东理工大学  
于建国 华东理工大学 jgyu@ecust.edu.cn 
摘要:
通过热分析、X射线衍射、红外光谱和盐酸浸取等手段研究了煤系高岭岩分别在空气、氮气和二氧化碳气氛下的热分解过程,讨论了煅烧气氛对热分解产物活性的影响。结果表明,煤系高岭岩煅烧产物的活性随着高岭石脱羟基和分解程度的提高而增加,空气气氛下煤质的燃烧促进了高岭石的分解。当温度超过600℃时,高岭石的分解产物偏高岭石开始进一步转化,煅烧产物的活性随之下降,不同气氛下的下降程度不同。空气气氛促进了偏高岭石向惰性产物的转变,而二氧化碳气氛则有助于抑制这种转变。
关键词:    高岭石  气氛  热活化
DOI:
分类号:
基金项目:国家高技术研究发展计划(863计划)
The Influence of Calcination Atmospheres on Thermal Activation of Kaolinite-rich Rocks associated with Coal Measures
SI PENG,QIAO XIU CHEN,YU JIAN GUO
Abstract:
The thermal decomposition of kaolinite-rich rocks associated with coal measures (KRC) at air, nitrogen and carbon dioxide atmospheres was studied using thermal analysis, X-ray diffraction, infrared spectrum and hydrochloride acid leaching methods. The influence of calcination atmospheres on the activity of decomposed KRC was discussed. The results showed that the activity of calcined KRC increased with the dehydroxylation and decomposition degree of kaolinite, which was facilitated by the combustion of coal content at air atmosphere. When the calcination temperature exceeded 600 oC, further transformation occurred for metakaolinite, giving rise to a decline in the activity of calcined KRC, which differed at different atmospheres. The transformation from metakaolinite to inert phases was promoted by the combustion of coal content at air atmosphere, whereas was inhibited at carbon dioxide atmosphere.
Key words:  Coal  Kaolinite  Atmosphere  Thermal activation

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