Fuel and oxygen addition for metal smelting or refining process

Patent · Tue Nov 22 04:00:00 EST 1994

OSTI ID:7120845

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 figs.

• DOE Contract Number: FC07-89ID12847
• Assignee: Steel Technology Corp., Washington, DC (United States)
• Patent Number(s): A; US 5366537
• Application Number: PPN: US 8-000722
• OSTI ID: 7120845
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320301 -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Energy Sources
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTION HEAT
ENERGY
ENERGY SOURCES
ENRICHMENT
ENTHALPY
FOSSIL FUELS
FUEL FEEDING SYSTEMS
FUEL SYSTEMS
FUELS
HEAT
IRON ORES
MATERIALS
ORES
OXIDATION
OXYGEN ENRICHMENT
PHYSICAL PROPERTIES
PULVERIZED FUELS
REACTION HEAT
SMELTERS
SMELTING
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES