Nature there are no pure graphite, which often contain SiO2, Al2O3, FeO, CaO, P2O5, CuO and other impurities. These impurities often appear to quartz, pyrite, carbonate and other minerals form. In addition, water, bitumen, CO2, H2, CH4, N2 and other gases portions. Therefore, the analysis of graphite, in addition to measuring the effect of the fixed carbon content of the outer graphite, also must determine the content of volatile matter and ash at the same time. Dense crystalline graphite dense crystalline graphite, also known as bulk graphite. Such crystalline graphite crystal clear visible. Particle diameter greater than 0.1 mm graphite quality, focused on the specific surface area range 0.1-1m2 / g, crystal arrangement disorganized, dense block structure. This: Graphite is characterized by high grade, usually carbon content of 60 to 65% graphite, sometimes up to 80 to 98% graphite functions, but not as good as its plasticity and creamy good flake graphite. EDM graphite: EDM is a revolution in today's mold industry, which means not only simplifies the traditional process, but also the manufacture of shaped mold as possible. Isostatic graphite due to isotropic, is the best material for the manufacture of graphite EDM electrodes. Graphite pictures, graphite, carbon industry is provided by the North Sea Dragon Sea Dragon Carbon Co., Ltd. Weifang. Carbon Co., Ltd. Weifang Sea Dragon (www.longmentanye.com) strong, credible, Shandong Weifang graphite and carbon products industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead the industry in the North Sea Dragon carbon into the brilliant and you work for a better future!