Method of melting and/or refining metals and cooling device for the graphite electrode used for the same
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United States of America Patent
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Jul 10, 1990
Grant Date -
N/A
app pub date -
Aug 15, 1988
filing date -
Mar 17, 1987
priority date (Note) -
Expired
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Abstract
A method for melting and/or refining metals and a cooling device for the graphite electrode used for the same are disclosed. Melting and/or refining of metal such as steel-making are performed in an electric arc furnace by energizing three graphite electrode sets each corresponding to each phase of a three-phase AC power source and consisting of a vertical succession of graphite electrodes as typically shown at 10 in FIGS. 2, 3 and 4, connected to one another via nipples. During the melting and/or refining of metal, a cooling liquid 11, substantially consisting of water for instance, is continuously blown against the outer periphery 10a of at least one of each set of graphite electrodes, specifically a graphite electrode 10 extending between an electrode holder and a furnace top cover. The liquid coolant 11 is jet not in the horizontal direction but in a downwardly or upwardly inclined direction at an angle of 10.degree. to 35.degree. C. with respect to the horizontal.
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