PROCESS OF MAKING CARBON ELECTRODES
A new process for preparing a graphite article such as a graphite electrode or cathode is described. The process comprises (a) mixing (i) a particulate fraction comprising at least about 35 weight percent coke, coal or mixtures thereof having a diameter such that a major fraction passes through a 25...
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Main Authors | , , , , |
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Format | Patent |
Language | English French German |
Published |
12.11.2008
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Subjects | |
Online Access | Get full text |
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Summary: | A new process for preparing a graphite article such as a graphite electrode or cathode is described. The process comprises (a) mixing (i) a particulate fraction comprising at least about 35 weight percent coke, coal or mixtures thereof having a diameter such that a major fraction passes through a 25 mm mesh screen but not a 0.25 mm mesh screen, and (ii) a pitch binder, to form a stock blend; (b) extruding the stock blend to form a green stock; (c) baking the green stock to form a carbonized stock; and (d) graphitizing the carbonized stock by maintaining the carbonized stock at a temperature of at least about 2500 degree C. A graphite electrode column made using the new process has sufficient strength to maintain the integrity of the graphite electrode column without use of a pin, has increased resistance to cracking and has reduced brittleness, when plural such graphite electrode columns are used to form a graphite electrode. |
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Bibliography: | Application Number: EP20030716506 |