硫酸-氢氟酸分步法提纯石墨的工艺研究

发布时间：2018-06-04 10:24

  本文选题：高纯石墨 + 分步提纯法　； 参考：《非金属矿》2017年03期

【摘要】：用硫酸与氢氟酸分步对原料石墨进行酸浸提纯,分别研究了硫酸和氢氟酸的反应温度、用量、反应时间对提纯效果的影响。采用外加磁场的反应器,大大缩短反应时间,提高反应效率。制取高纯石墨的最佳条件为:硫酸反应温度为80℃,6 mol/L的硫酸用量90 m L,反应时间为2 h;氢氟酸反应温度为50℃,质量分数20%的氢氟酸用量为80 m L,反应时间为2 h。经过硫酸-氢氟酸提纯之后的石墨,固定碳质量分数从79.03%可提高到98.65%,此工艺能有效缓解我国高纯石墨依靠进口的局面,应用前景广阔。
[Abstract]:The acid leaching of raw graphite was carried out with sulfuric acid and hydrofluoric acid. The effects of reaction temperature, dosage and reaction time on the purification effect were studied. The reaction time was shortened and the reaction efficiency was improved by using the external magnetic field reactor. The optimum conditions for preparing high purity graphite are as follows: the sulfuric acid reaction temperature is 80 鈩，

本文编号：1977017