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China Minmetals Corporation 2024-09-09
On September 3, 2024, the scientific research team of China Minmetals Graphite Industry Co., Ltd. (Heilongjiang) made a great breakthrough in the key technology of high-temperature purification of graphite and successfully developed ultra-high purity graphite products with a purity degree of over 99.99995%. This marks that China's ultra-high purity graphite products have reached the international leading level and will play an important role in the stable supply of high-end carbon-based materials for China's strategic emerging industries.
Ultra-high purity graphite refers to graphite with a carbon content of over 99.99%, which is characterized by good self-lubricating properties, good conductivity, corrosion and high-temperature resistance, and excellent chemical stability.
The scientific research team of China Minmetals Graphite Industry Co., Ltd. (Heilongjiang) has carried out technological research to tackle the key common problems in the field of natural graphite, and made breakthroughs in traditional designs in the industry. Besides, it has collaborated with leading equipment manufacturing enterprises to independently develop continuous graphite purification processes and equipment. Through cascade purification of multiple technology combinations, including physical and chemical purification, continuous purification at low-temperature and high-temperature and ultra-high vacuum purification, the purity degree of graphite is increased from 95% to over 99.99995%, while the product quality remains stable. The rational combined process flow also provides products with significant advantages in production costs.
China Minmetals, equipped with one of the largest graphite mines across the world - Yunshan Graphite Mine in Hegang, has built a graphite beneficiation plant and a deep processing industry chain with an annual output of 200,000 tons. With respect to the application of ultra-high purity graphite products, the scientific research team is accelerating the research and development of carbon-based materials such as high-end negative electrode materials, nuclear-grade graphite and graphite for semiconductor applications.