Ultrahigh Temperature Purification of Graphite for the Development of a Continuous Process.

ABSTRACT: This work presents a study of ultrahigh temperature purification of natural Canadian graphite flakes. The concentrated natural graphite flakes were purified using two test facilities, an ultrahigh temperature fixed bed furnace and an ultrahigh temperature fast-heating counterflow reactor. With the fixed bed furnace, the natural graphite flakes were purified at 2500 or 2800 °C for 15-120 min. With the counterflow reactor, the residence time was ∼20-25 min, with an average temperature of 2700 °C and higher local temperatures due to electric arcing. The heat-treated samples were characterized by using several different analysis techniques. The results showed that the samples treated with the fast-heating counterflow reactor reached a very high purity above 99.9 wt % carbon. The samples treate

SUBMITTER: Tan Y 

PROVIDER: S-EPMC12489646 | biostudies-literature | 2025 Sep

REPOSITORIES: biostudies-literature