On the 3rd, at the conference held in Hegang City, Heilongjiang Province, to announce the achievements in the high-quality utilization of natural graphite, it was revealed that a research team led by Wang Jiong-hui from China Minmetals Corporation has overcome key technologies for high-temperature purification of graphite. They successfully developed ultra-high-purity graphite products with a purity of over 99.99995%, marking a significant achievement that positions China's ultra-high-purity graphite products at an internationally leading level.
Ultra-high-purity graphite refers to graphite with a carbon content of over 99.99%, characterized by excellent self-lubricating properties, good electrical conductivity, high corrosion resistance, high-temperature resistance, and outstanding chemical stability.
Wang Jiong-hui's research team broke away from traditional industry designs and collaborated with leading equipment manufacturing companies to independently develop a continuous graphite purification process and equipment. By employing a combination of technologies such as physical and chemical purification, low-temperature and high-temperature continuous purification, and ultra-high vacuum purification, they significantly improved the graphite purity from 95% to over 99.99995%, while maintaining consistent product quality. Remarkably, the rational combination of processing pathways provides a considerable cost advantage in production.
China Minmetals owns the world's largest graphite mine in Hegang Yunshan and has established a graphite selection plant with an annual output of 200,000 tons, along with a deep processing industrial chain. In the application of ultra-high-purity graphite products, Wang Jiong-hui's team is accelerating the research and development of high-end anode materials, nuclear-grade graphite, and graphite for semiconductor applications, among other carbon-based materials.