Lance for fuel and oxygen injection into smelting or refining furnace
Abstract
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.
- Inventors:
- Issue Date:
- OSTI Identifier:
- 6681005
- Patent Number(s):
- 5374297
- Application Number:
- PPN: US 8-151007
- Assignee:
- Steel Technology Corporation, Washington, DC (United States)
- DOE Contract Number:
- FC07-89ID12847
- Resource Type:
- Patent
- Resource Relation:
- Patent File Date: 12 Nov 1993
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 01 COAL, LIGNITE, AND PEAT; 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, & Peat- Products & By-Products
Citation Formats
Schlichting, M R. Lance for fuel and oxygen injection into smelting or refining furnace. United States: N. p., 1994.
Web.
Schlichting, M R. Lance for fuel and oxygen injection into smelting or refining furnace. United States.
Schlichting, M R. Tue .
"Lance for fuel and oxygen injection into smelting or refining furnace". United States.
@article{osti_6681005,
title = {Lance for fuel and oxygen injection into smelting or refining furnace},
author = {Schlichting, M R},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {12}
}