Fuel and oxygen addition for metal smelting or refining process
- Chesterton, IN
A furnace 10 for smelting iron ore and/or refining molten iron 20 is equipped with an overhead pneumatic lance 40, through which a center stream of particulate coal 53 is ejected at high velocity into a slag layer 30. An annular stream of nitrogen or argon 51 enshrouds the coal stream. Oxygen 52 is simultaneously ejected in an annular stream encircling the inert gas stream 51. 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 84 to react with carbon monoxide gas rising from slag layer 30, thereby adding still more heat to the furnace.
- Research Organization:
- American Iron and Steel Inst., Pittsburgh, PA (United States)
- DOE Contract Number:
- FC07-89ID12847
- Assignee:
- Steel Technology Corporation (Washington, DC)
- Patent Number(s):
- US 5366537
- OSTI ID:
- 869610
- Country of Publication:
- United States
- Language:
- English
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Lance for fuel and oxygen injection into smelting or refining furnace
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Related Subjects
oxygen
addition
metal
smelting
refining
process
furnace
10
iron
molten
20
equipped
overhead
pneumatic
lance
40
center
stream
particulate
coal
53
ejected
velocity
slag
layer
30
annular
nitrogen
argon
51
enshrouds
52
simultaneously
encircling
inert
gas
interposition
streams
prevents
volatile
matter
combusting
reaches
heat
combustion
efficiently
delivered
sustain
desired
reactions
occurring
outermost
annulus
84
react
carbon
monoxide
rising
adding
monoxide gas
volatile matter
carbon monoxide
gas stream
inert gas
particulate coal
slag layer
molten iron
coal stream
smelting iron
refining process
gas rising
refining molten
reactions occur
center stream
oxygen stream
overhead pneumatic
oxide gas
pneumatic lance
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