石墨鳞片大小对膨胀容积影响的机理探讨  

Discussion on the Mechanism of the Influence of Graphite Scale Size on Expansion Volume

作　　者：彭成龙 黄婧 沈毅[1,2] 李云国 张寄丹 刘学琴[1,2] 王洋[1,2] 李珍[1,2] PENG Chenglong;HUANG Jing;SHEN Yi;LI Yunguo;ZHANG Jidan;LIU Xueqin;WANG Yang;LI Zhen(Engineering Research Center of Nano-Geomaterials,Ministry of Education;Faculty of Materials Science and chemistry,China University of Geosciences,Wuhan 430074,China;The Institute of Geology Exploration of Heilongjiang Province,Jiamusi 15400,China)

机构地区：[1]纳米矿物材料及应用教育部工程研究中心,湖北武汉430074 [2]中国地质大学材料与化学学院,湖北武汉430074 [3]黑龙江省第六地质勘察院,黑龙江佳木斯154000

出　　处：《矿产保护与利用》2018年第5期62-66,共5页Conservation and Utilization of Mineral Resources

基　　金：黑国土科研(201604)

摘　　要：针对石墨鳞片大小对膨胀容积影响规律与机理研究较少的问题,论文选取不同大小鳞片石墨,在相同工艺条件进行膨胀实验。利用XRD和SEM对石墨精矿、层间化合物和膨胀石墨的结构与形貌进行了表征,建立反应动力学模型和膨胀石墨堆积模型。结果表明:随着石墨鳞片增大,膨胀石墨的膨胀容积越高。微观上,石墨层间化合物高温分解产生气体对大鳞片石墨作用时间长,致使层间距较大;宏观上,膨胀石墨的堆积方式不同致使膨胀容积差异。Few research has been carried out on the influence rules and mechanism of graphite scale size on expanded volume.In this paper,different scale graphite was selected and expanded under the same process conditions.The structure and morphology of graphite concentrate,interlayer compound and expanded graphite were characterized by XRD and SEM,and the reaction kinetics model and expanded graphite packing model were established.The results showed that the larger the graphite scale,the higher the expanded volume of expanded graphite.Microscopically,pyrolysis of graphite intercalation compounds produces a gas that acts on large scale flake graphite for a long time,resulting in a large interlayer spacing;Macroscopically,the expanded volume is different due to different packing methods of expanded graphite.

关 键 词：鳞片石墨 层间化合物 膨胀石墨 膨胀容积 反应动力学 

分 类 号：TD975.2[矿业工程—选矿] TQ050.421[化学工程]