Method for reducing iron losses in an iron smelting process
- Airmont, NY
- Greenville, SC
A process of smelting iron that comprises the steps of: a) introducing a source of iron oxide, oxygen, nitrogen, and a source of carbonaceous fuel to a smelting reactor, at least some of said oxygen being continuously introduced through an overhead lance; b) maintaining conditions in said reactor to cause (i) at least some of the iron oxide to be chemically reduced, (ii) a bath of molten iron to be created and stirred in the bottom of the reactor, surmounted by a layer of slag, and (iii) carbon monoxide gas to rise through the slag; c) causing at least some of said carbon monoxide to react in the reactor with the incoming oxygen, thereby generating heat for reactions taking place in the reactor; and d) releasing from the reactor an offgas effluent, is run in a way that keeps iron losses in the offgas relatively low. After start-up of the process is complete, steps (a) and (b) are controlled so as to: e) keep the temperature of the molten iron at or below about 1550.degree. C. and f) keep the slag weight at or above about 0.8 tonne per square meter.
- Research Organization:
- AMERICAN IRON & STEEL INST
- DOE Contract Number:
- FC07-94ID13284
- Assignee:
- Steel Technology Corporation (Washington, DC)
- Patent Number(s):
- US 5885322
- OSTI ID:
- 872203
- Country of Publication:
- United States
- Language:
- English
Investigation on the effect of Zn on the behaviour of S in the iron bath smelting reduction process
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journal | January 1993 |
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Related Subjects
reducing
iron
losses
smelting
process
comprises
steps
introducing
source
oxide
oxygen
nitrogen
carbonaceous
fuel
reactor
continuously
introduced
overhead
lance
maintaining
conditions
chemically
reduced
ii
bath
molten
created
stirred
bottom
surmounted
layer
slag
iii
carbon
monoxide
gas
rise
causing
react
incoming
generating
heat
reactions
taking
releasing
offgas
effluent
run
relatively
start-up
complete
controlled
temperature
below
1550
degree
weight
tonne
square
meter
monoxide gas
chemically reduce
continuously introduced
square meter
carbon monoxide
iron oxide
carbonaceous fuel
molten iron
smelting iron
reducing iron
gas effluent
oxide gas
chemically reduced
/75/