Lance for fuel and oxygen injection into smelting or refining furnace
A furnace for smelting iron ore and/or refining molten iron is equipped with an overhead pneumatic lance, through which a center stream of particulate coal is ejected at high velocity into a slag layer. An annular stream of nitrogen or argon enshrouds the coal stream. Oxygen is simultaneously ejected in an annular stream encircling the inert gas stream. The interposition of the inert gas stream between the coal and oxygen streams prevents the volatile matter in the coal from combusting before it reaches the slag layer. Heat of combustion is thus more efficiently delivered to the slag, where it is needed to sustain the desired reactions occurring there. A second stream of lower velocity oxygen can be delivered through an outermost annulus to react with carbon monoxide gas rising from slag layer, thereby adding still more heat to the furnace. 7 figures.
- DOE Contract Number:
- FC07-89ID12847
- Assignee:
- Steel Technology Corporation, Washington, DC (United States)
- Patent Number(s):
- US 5374297; A
- Application Number:
- PPN: US 8-151007
- OSTI ID:
- 6681005
- Resource Relation:
- Patent File Date: 12 Nov 1993
- Country of Publication:
- United States
- Language:
- English
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Fuel and oxygen addition for metal smelting or refining process
Fuel and oxygen addition for metal smelting or refining process
Related Subjects
BLAST FURNACES
FUEL FEEDING SYSTEMS
COAL
COMBUSTION
PNEUMATIC TRANSPORT
DESIGN
SMELTERS
IRON ORES
REDUCING AGENTS
SMELTING
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
ENERGY SOURCES
FOSSIL FUELS
FUEL SYSTEMS
FUELS
FURNACES
MATERIALS
ORES
OXIDATION
THERMOCHEMICAL PROCESSES
TRANSPORT
010500* - Coal
Lignite
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