Graphite crucibles are made of high-purity graphite raw materials, with an ash content of no more than 0.1%. They are mainly used in vacuum furnaces and high-frequency furnaces, or in melting furnaces. Graphite crucibles are used for melting ferrous metals, non-ferrous metals, semiconductors, precious metals, and other metals. It has good high temperature resistance and can be used in a furnace with a protective atmosphere or a vacuum at a temperature of about 2500 ℃.