Causes and occurrence: graphite is formed at high temperatures. Is the most widely distributed metamorphic graphite deposit, rich in organic matter by the Department or carbonaceous sedimentary rocks formed by regional metamorphism China: Lacey City, Shandong Province, one important producer of quality graphite graphite, graphite proved reserves of 6,871,100 tons of graphite results, are reserves of 6,399,300 tons. Another one is the graphite origin Panshi, graphite reserves of 5 million tons. World: Famous Origin: New York Ticonderoga, Madagascar and Ceylon, our Heilongjiang Jixi Liu Mao was the largest producer. Chinese graphite flake graphite products are divided into two categories and microcrystalline graphite: refers to the natural crystalline graphite flake graphite, the shape of scaly, Department by crystalline (flake) graphite ore processing, mineral processing, and some derived purified products; microcrystalline graphite has said earthy graphite or amorphous graphite, from tiny finger-like aggregates of dense natural graphite crystals constituted by the Department Aphanitic (earthy) graphite ore processed, some through beneficiation, purification obtained products. The main role of carbon graphite felt after felt under vacuum or inert atmosphere by more than 2000 ℃ high temperature treatment of graphite felt graphite, the carbon ratio of carbon felt high, reaching more than 99%. The late 1960s the world has graphite felt the supply of goods. Graphite felt due to the choice of different raw mat into PAN-based graphite felt and glue-based graphite felt two. The PAN-based carbon fiber felt or rayon-based carbon felt cut to the desired size, rolled into a tubular graphite into the material of the container, the container placed in a high temperature furnace graphite (graphite tube furnace for high temperature furnace, IF, high frequency induction furnace or other heating forms of high-temperature furnace) graphite picture, with a vacuum or inert gas through high purity, to 100 ~ 300 ℃ / h heating rate of heating to 2200 ~ 2500 ℃, and then naturally cooled to 100 ℃ that too. Wholesale graphite, carbon industry in the North Sea Dragon (certified), graphite is provided by Carbon Co., Ltd. Weifang Sea Dragon. Carbon Co., Ltd. Weifang Sea Dragon (www.longmentanye.com) Shandong Weifang, graphite and carbon products leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. In the North Sea Dragon carbon industry leadership with the staff warmly welcome all inquiries negotiations to create the North Sea Dragon carbon industry a better future.