大田细鳞片石墨的提纯试验研究.pdf

第 卷第 期 32 1 Vol.32 No.1 非金属矿 年 月 2009 1 Non-Metallic Mines January, 2009 大田细鳞片石墨的提纯试验研究 刘 曦  雷新荣  吴红丹  万为敏 （中国地质大学 （武汉）材料科学与化学工程学院，湖北 武汉 430074） 摘  要  以福建大田县产细鳞片石墨（含碳量为90.94% ）为原料，采用碱酸法对其进行提纯实验研究，并分析了各工艺因素对提纯效果的影 响。最佳工艺条件为：碱熔过程中焙烧温度600℃，时间90min ，NaOH 溶液浓度38%，NaOH / 石墨质量比26.8%；酸浸过程中酸浸温度70℃，酸浸 时间120min ，盐酸浓度10%，HCl / 石墨质量比3.84 ，在此条件下所制得的石墨固定碳含量达到98.74%。 关键词  细鳞片石墨 化学提纯 碱熔法 酸浸法      TD97 A 1000-8098(2009)01-0053-04 中图分类号： 文献标识码： 文章编号： Study on Purification of the Finely Squamose Graphite from Datian County Liu Xi Lei Xinrong Wu Hongdan Wan Weimin (Material Science and Engineering,China University of Geosciences, Wuhan 430074) Abstract With the finely squamose graphite produced in Datian County(carbon content 90.94%) as raw materials, study on purification of finely squamose graphite through alkali fusion and acid leaching approach was carried out, and process factors on purifying effect were invertigated. The optimum process conditions were as follows: alkali fusion temperature 600 ℃, time 90min, NaOH concentration 38%, NaOH-to-graphite ratio 26.8%; acid leaching temperature 70 ℃, time 120min, HCl concentration 10%, HCl-to-graphite ratio 3.84. In this condition the content of C in the finely squamose graphite can reach 98.74 %. Key words finely squamose graphite chemical purification alkali fusion approach acid leaching approach 大田县石墨结晶良好，属于细鳞片状石墨。石 1.1 实验材料  石墨原