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US 6,692,549 B2Granted
Methods for integration of a blast furnace and an air separation unit
AssigneeAir Liquide Process & Construction, Inc.
InventorsBao Ha, Jean-Renaud Brugerolle
Life of this patent
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Abstract
The present invention generally relates to processes and apparatuses for the integration of a blast furnace and an air separation plant to increase blast furnace production. The present invention recovers energy from the air separation through the expansion of a product stream.
Claims12
A process for integrating a blast furnace and an air separation unit comprising the steps of:
- feeding feed air to the blast furnace;
- removing a first portion of feed air to the blast furnace;
- separating at least one oxygen rich stream and at least a second stream containing nitrogen from the first portion in the air separation unit;
- heating the second stream containing nitrogen;
- expanding the second stream containing nitrogen to recover energy;
- and,
- feed all of the oxygen rich stream to the blast furnace.
4 more elements
Dependencies are inferred from the claim text.