Apparatus for blast furnace fuel injection
A blast furnace blow pipe is described for injection of increased amounts of fuel, said blow pipe characterized by a plurality of fuel injection lances at spaced locations around the periphery of the blow pipe, said lances extending through a wall of the blow pipe and making an acute angle therewith, each said lances terminating at an inner end at a location within a passage in the blow pipe spaced a sufficient distance from the blow pipe wall so that combustion of the fuel will not overheat the blow pipe, the axis of each lance being directed toward a point adjacent an interior end of the blow pipe adapted to be connected to a blast furnace tuyere, said point being located on a centerline of the passage in the blow pipe and being spaced from the interior end of the blow pipe a distance within the range of from about 1 inch (25.4 mm) to about 5 inches (127.0 mm), the inner end of each lance being spaced from said point a distance within the range of from about 2 inches (50.8 mm) to about 6 inches (152.4 mm) so as to permit ignition of the stream of fuel from each lance separately before substantial mixing of the fuel occurs with that from another lance.
- Assignee:
- USX Corp., Pittsburgh, PA (United States)
- Patent Number(s):
- A; US 5227117
- Application Number:
- PPN: US 7-889897
- OSTI ID:
- 6301943
- Country of Publication:
- United States
- Language:
- English
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