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US 9,751,792 B2Granted
Post-manufacturing processes for submerged combustion burner
AssigneeJohns Manville
InventorsJuan Carlos Madeni, John Wayne Baker
Life of this patent
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Abstract
A portion of a submerged combustion burner is disposed into a pressure vessel. The portion of the submerged combustion burner has a welded area that has a first microstructure defined by a first number of voids. The vessel is filled with an inert gas, pressurized, and heated. Pressurizing and heating operations are performed for a time and at a temperature and a pressure sufficient to produce a second microstructure in the welded area of the burner. The second microstructure is defined by a second number of voids less than the first number of voids.
Claims12
A method comprising:
- disposing at least a portion of a submerged combustion burner into a pressure vessel, wherein the portion of the submerged combustion burner has a first microstructure defined by a first number of voids;
- filling the pressure vessel containing the portion of the submerged combustion burner with an inert gas;
- pressurizing the pressure vessel containing the portion of the submerged combustion burner;
- heating the pressure vessel containing the portion of the submerged combustion burner, wherein the pressurizing and heating operations are performed for a time and at a temperature and a pressure sufficient to produce a second microstructure in the burner, wherein the second microstructure is defined by a second number of voids less than the first number of voids;
- and
- weld-repairing a defect in the portion of the submerged burner before disposing the portion of the submerged combustion burner in the pressure vessel.
3 more elements
Dependencies are inferred from the claim text.