Shamokin Carbons - Synthetic Graphite
From Carbon Materials
Is primarily the result of Electrode manufacturing. These electrodes carry the electricity that heats electric arc furnaces, the vast majority steel furnaces. They are made from petroleum coke after it is mixed with petroleum pitch, extruded and shaped, then baked to sinter it, and then graphitized by heating it above the temperature (3000 °C) that converts carbon to graphite. They can vary in size up to 11 ft. long and 30 in. in diameter.
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Powder and scrap The powder is made by heating powdered petroleum coke above the temperature of graphitization. The graphite scrap comes from pieces of unusable electrode material (in the manufacturing stage or after use) and lathe turnings, usually after crushing and sizing. Most synthetic graphite powder goes for carbon raisers in foundries and steel plants. Synthetic graphite is processed at ultra high temperatures, and impurities contained in the precursor carbons are significantly reduced in concentration during processing. This occurs as a result of the high temperature vaporization of volatile impurities, which at the process temperatures utilized includes most metal oxides, sulfur, nitrogen, hydrogen, and all organic components that were part of the original petroleum or coal tar pitch. Synthetic graphite is essentially the most chemically pure form of carbon available.
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