酸洗天然石墨高温提纯析出产物结构及成分分析  

Study on the structure and composition of high-temperature purification precipitates of natural graphite after pickling

作　　者：段生治 吴小文[1] 陈跃峰 蒋加诚 黄朝晖[1] Duan Sheng-zhi;Wu Xiao-wen;Chen Yue-feng;Jiang Jia-cheng;Huang Zhao-hui(School of Materials Science and Engineering,China University of Geosciences(Beijing),Beijing 100083,China;Shaanxi Liuyuan Carbon Crystal Company Limited,Shaanxi Xianyang 713100,China)

机构地区：[1]中国地质大学(北京)材料科学与工程学院,北京100083 [2]陕西六元碳晶股份有限公司,陕西咸阳713100

出　　处：《炭素技术》2023年第2期56-60,共5页Carbon Techniques

摘　　要：高温提纯是获得超高纯石墨的重要手段,分析高温提纯过程中杂质成因与杂质析出机制具有重要意义。本文将浮选石墨经酸洗提纯后,采用高温纯化方式进行再提纯。通过对高温提纯前后的石墨和炉内外收集的杂质进行化学成分、显微形貌和物相组成分析,研究了高温提纯过程中的杂质析出机理和炉内杂质形成原因,为天然石墨的高温提纯工艺优化提供了重要参考。High-temperature purification is an important means to obtain ultra-high-purity graphite,and it is important to analyze the causes of impurities and impurity precipitation mechanism in the high-temperature purification process.In this paper,the graphite after flotation was purified by acid washing,and then purified by high temperature treatment.By analyzing the chemical composition,morphology and phase composition of the graphite before and after high temperature purification and the impurities collected the inside and outside of the furnace,the mechanism of impurity precipitation in the process of high temperature purification and the formation reason of impurities in the furnace were studied,which could be helpful to provide an important reference for optimizing the high temperature purification process of natural graphite.

关 键 词：鳞片石墨 连续高温纯化炉 提纯 

分 类 号：P619.252[天文地球—矿床学] TQ420.6[天文地球—地质学]