Fuel and oxygen addition for metal smelting or refining process
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):
- US 5366537; A
- Application Number:
- PPN: US 8-000722
- OSTI ID:
- 7120845
- Resource Relation:
- Patent File Date: 5 Jan 1993
- Country of Publication:
- United States
- Language:
- English
Similar Records
Lance for fuel and oxygen injection into smelting or refining furnace
Lance for fuel and oxygen injection into smelting or refining furnace
Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
COAL
COMBUSTION
SMELTERS
FUEL FEEDING SYSTEMS
OXYGEN ENRICHMENT
COMBUSTION HEAT
IRON ORES
PULVERIZED FUELS
SMELTING
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
ENERGY
ENERGY SOURCES
ENRICHMENT
ENTHALPY
FOSSIL FUELS
FUEL SYSTEMS
FUELS
HEAT
MATERIALS
ORES
OXIDATION
PHYSICAL PROPERTIES
REACTION HEAT
THERMOCHEMICAL PROCESSES
THERMODYNAMIC PROPERTIES
014000* - Coal
Lignite
& Peat- Combustion
320301 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Energy Sources