Study on Detection of Impurity Composition in High-purity Graphite

The impurity content in high-purity graphite was extremely low,so it is very difficult to detect the existence of impurities,and the impurity content also can not be accurately detected.According to the properties of impurities in high-purity graphite,a method to enrich the impurities in high-purity graphite was put forward.After detection and analysis of enriched ash,it is found that the impurity in high-purity graphite was mostly composed of Si and Al,besides a trace of Fe,Ca and Mg,with the content of Si being the highest.How to increase Si removal efficiency is the key for improving purification effect.