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xinhua news agency, harbin, september 3 (reporter liang shubin) the reporter learned from the press conference on the high-quality utilization of natural graphite held in hegang city, heilongjiang province on the 3rd that wang jionghui's scientific research team of china minmetals corporation has overcome the key technology of high-temperature purification of graphite and successfully developed ultra-high purity graphite products with a purity of more than 99.99995%, marking that my country's ultra-high purity graphite products have reached the international leading level.

ultra-high purity graphite refers to graphite with a carbon content of more than 99.99%. it has the characteristics of good self-lubrication, good conductivity, corrosion resistance, high temperature resistance, and excellent chemical stability.

wang jionghui's research team broke through the traditional design of the industry and jointly developed a continuous graphite purification process and equipment with leading equipment manufacturing companies in the industry. through physical and chemical purification, low-temperature and high-temperature continuous purification, ultra-high vacuum purification, and multiple technical combinations, the purity of graphite was increased from 95% to more than 99.99995%, and the product quality was kept stable. what is commendable is that the reasonable joint process path gives the product a significant advantage in production cost.

china minmetals owns the world's largest hegang yunshan graphite mine, and has built a graphite concentrator with an annual output of 200,000 tons and a deep processing industry chain. in the application of ultra-high purity graphite products, wang jionghui's team is accelerating the research and development of high-end negative electrode materials, nuclear-grade graphite, and semiconductor graphite and other carbon-based material products.