煅烧气氛对煤系高岭岩热活化的影响  

Influence of Calcination Atmospheres on Thermal Activation of Kaolinite-Rich Rocks Associated with Coal Measures

作　　者：司鹏[1] 乔秀臣[1] 于建国[2] 

机构地区：[1]华东理工大学资源与环境工程学院,上海200237 [2]华东理工大学化学工程联合国家重点实验室,上海200237

出　　处：《华东理工大学学报（自然科学版）》2011年第5期571-576,共6页Journal of East China University of Science and Technology

基　　金：国家863计划(SQ2007AA06Z129028);上海浦江人才计划(PJ200700339);上海市科委重大专项(10dz1204901);上海市重点学科建设项目(B506)

摘　　要：分别在空气、N2和CO2气氛下进行煤系高岭岩的热活化实验,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的热分解过程,讨论了煅烧气氛对煤系高岭岩热分解产物结构和活性的影响。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CO2气氛则有助于抑制这种转变。The thermal activation experiments of kaolinite-rich rocks associated with coal measures（KRC） were conducted in air,nitrogen and carbon dioxide atmospheres,respectively.The thermal decomposition of KRC was studied using thermal analysis,X-ray diffraction,infrared spectroscopy and hydrochloride acid leaching methods.The influence of calcination atmospheres on the structure and activity of 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 in air atmosphere.When the calcination temperature exceeded 600 ℃,further transformation of metakaolinite occurred,giving rise to a decline in the activity of calcined KRC,which differed at diverse atmospheres.The transformation from metakaolinite to inert phases was promoted by the combustion of coal content in air atmosphere,whereas was inhibited in carbon dioxide atmosphere.

关 键 词：煤 高岭石 气氛 热活化 

分 类 号：TD985[矿业工程—选矿] TF821[冶金工程—有色金属冶金]