Method of preheating steelmaking ladles
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United States of America Patent
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Mar 27, 2012
Grant Date -
Dec 11, 2008
app pub date -
Jun 11, 2008
filing date -
Jun 11, 2007
priority date (Note) -
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Abstract
A method for when preheating a ladle for use in steelmaking where less fuel is consumed in heating the ladle efficiently accurately to a controlled temperature. A temperature of a preheating process is varied by controlling a burner of the heating unit based on measurements of refractories of the ladle taken by a pyrometer. The heating unit includes an emissive coating for reducing heat loss and efficient heating during the preheating process. The heating unit also includes valve mechanisms for accurately varying a flame size of the burner of the heating unit during an idle stage of the preheating process.
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