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US 2021/0080102 A1Published application
Method for Reducing Nitrogen Oxides In Strip Heat Treatment Furnaces
AssigneeAndritz Technology and Asset Management GmbH
InventorsPierre-Jerome Borrel, Eric Blake, Martin Hamman
Life of this patent
Estimating the term…
Abstract
A method for treating a metal strip, where the metal strip undergoes heat treatment in a directly fired furnace and is subsequently heat-treated further in a radiant tube furnace. At least part of the exhaust gases from the radiant tubes is fed to the directly fired furnace.
Claims20
1-10. (canceled)
A method for treating a metal strip (5), comprising:
- providing a metal strip (5);
- heat treating the metal strip (5) in a directly fired furnace (1) to yield a directly heated metal strip;
- heat treating the directly heated metal strip in a radiant tube furnace (10), thereby forming exhaust gases (16);
- and
- feeding at least a portion of the exhaust gases (16) from the radiant tubes to a burner in the directly fired furnace (1).
2 more elements
A method for treating a metal strip (5), comprising:
- providing a directly fired furnace (1) having a directly fired zone (2), a non-fired zone (7) adjacent the directly fired zone (2), and an afterburner chamber (9) adjacent the non-fired zone;
- providing a metal strip (5);
- heat treating the metal strip (5) in the directly fired furnace (1) by running the metal strip (5) through the non-fired zone (7) and then the directly fired zone (2) to yield a directly heated metal strip;
- heat treating the directly heated metal strip in a radiant tube furnace (10), thereby forming exhaust gases (16);
- and
- feeding at least a portion of the exhaust gases (16) from the radiant tubes to one or both of burners in the directly fired zone (2) and the afterburner chamber (9) of the directly fired furnace (1).
3 more elements
Dependencies are inferred from the claim text.