Lance for fuel and oxygen injection into smelting or refining furnace

Patent · Tue Dec 20 04:00:00 EST 1994

OSTI ID:6681005

Schlichting, M R

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): A; US 5374297
• Application Number: PPN: US 8-151007
• OSTI ID: 6681005
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010500* -- Coal
Lignite
& Peat-- Products & By-Products
BLAST FURNACES
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COMBUSTION
DESIGN
ENERGY SOURCES
FOSSIL FUELS
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
FUELS
FURNACES
IRON ORES
MATERIALS
ORES
OXIDATION
PNEUMATIC TRANSPORT
REDUCING AGENTS
SMELTERS
SMELTING
THERMOCHEMICAL PROCESSES
TRANSPORT