The use of graphite electrodes in steel making accounts for 50 percent of the steel manufactured in the United States, the department said.
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Bucking the today's market trend were shares of carbon graphite electrode maker Tokai Carbon rising 26 yen, or 6.9 percent, to 401 yen.
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On a much smaller scale, synthetic graphite electrodes are used in electrical discharge machining ( EDM ), commonly to make injection molds for plastics.
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Synthetic graphite, is made in large quantities ( graphite electrodes, graphite fiber ) from carbon precursors such as petroleum coke or a textile fiber.
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In 1996 SGL Carbon's sales of graphite electrodes were 986 million deutsche marks ( $ 570 million ), more than half of total sales.
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Bucking the today's market trend were shares of carbon graphite electrode maker Tokai Carbon rising 26 yen, or 6 . 9 percent, to 401 yen.
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Graphite electrodes are large carbon columns used in electric arc furnaces in steelmaking mini-mills to generate the heat necessary to melt and further refine steel.
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UCAR International Inc ., of Danbury, Connecticut, and SGL Carbon AG, of Wiesbaden, Germany, are the two largest producers of graphite electrodes in the world.
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A spokeswoman for the Justice Department's antitrust division confirmed that investigators are examining " the possibility of anticompetitive practices in the graphite electrodes industry ."
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The department said Mitsubishi owned 50 percent of UCAR International, the world's largest producer of graphite electrodes, which are large heat-generating columns used in steel-making.
