Top-blowing lance and method for refining molten iron using the same
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United States of America Patent
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Feb 28, 2017
Grant Date -
Oct 9, 2014
app pub date -
Oct 16, 2012
filing date -
Oct 17, 2011
priority date (Note) -
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Abstract
A top-blowing lance includes a refining oxygen gas blowing nozzle having a plurality of ejection openings through which oxygen gas is blown into an iron bath in a reaction vessel, the ejection openings being disposed along a circular orbit at intervals, and a burner nozzle having an axis coaxial with the central axis of the circular orbit, forming a flame inside the refining oxygen gas blowing nozzle, and having ejection openings for blowing a powder heated by the flame into the iron bath, wherein an indicator A that indicates the positional relationship between the ejection openings of the refining oxygen gas blowing nozzle and the ejection openings of the burner nozzle satisfies the specified conditions.
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