Blast furnace operating method and tube bundle-type lance
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United States of America Patent
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Apr 12, 2016
Grant Date -
Jul 2, 2015
app pub date -
Jul 11, 2013
filing date -
Jul 13, 2012
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Abstract
A blast furnace operating method by blowing at least a solid reducing material into an inside of the furnace from a tuyere thereof with a lance, wherein a tube bundle-type lance formed by bundling a plurality of blowing tubes side-by-side and housing them in a main tube of the lance is used when only a solid reducing material or two kinds of a solid reducing material and a combustible gas or three kinds of a solid reducing material, a combustible gas and a gaseous reducing material are blown in the inside of the blast furnace, whereby the solid reducing material, combustible gas and gaseous reducing material are blown through the respective blowing tubes, and a tube bundle-type lance.
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