Method for reducing iron losses in an iron smelting process
Abstract
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 (1) at least some of the iron oxide to be chemically reduced, (2) a bath of molten iron to be created and stirred in the bottom of the reactor, surmounted by a layer of slag, and (3) 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: (1) keep the temperature of the molten iron at or below about 1550 C and (2) keep the slag weight at or above about 0.8 ton per square meter. 13 figs.
- Inventors:
- Issue Date:
- Research Org.:
- American Iron and Steel Institute
- Sponsoring Org.:
- USDOE, Washington, DC (United States)
- OSTI Identifier:
- 335447
- Patent Number(s):
- 5885322
- Application Number:
- PAN: 8-823,012
- Assignee:
- Steel Technology Corp., Washington, DC (United States)
- DOE Contract Number:
- FC07-94ID13284
- Resource Type:
- Patent
- Resource Relation:
- Other Information: PBD: 23 Mar 1999
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 01 COAL, LIGNITE, AND PEAT; IRON ORES; SMELTING; SMELTERS; REDUCTION; IRON OXIDES; CARBON MONOXIDE; OXYGEN ENRICHMENT; SLAGS; PROCESS CONTROL; TEMPERATURE CONTROL; CARBONACEOUS MATERIALS
Citation Formats
Sarma, B, and Downing, K B. Method for reducing iron losses in an iron smelting process. United States: N. p., 1999.
Web.
Sarma, B, & Downing, K B. Method for reducing iron losses in an iron smelting process. United States.
Sarma, B, and Downing, K B. Tue .
"Method for reducing iron losses in an iron smelting process". United States.
@article{osti_335447,
title = {Method for reducing iron losses in an iron smelting process},
author = {Sarma, B and Downing, K B},
abstractNote = {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 (1) at least some of the iron oxide to be chemically reduced, (2) a bath of molten iron to be created and stirred in the bottom of the reactor, surmounted by a layer of slag, and (3) 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: (1) keep the temperature of the molten iron at or below about 1550 C and (2) keep the slag weight at or above about 0.8 ton per square meter. 13 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Mar 23 00:00:00 EST 1999},
month = {Tue Mar 23 00:00:00 EST 1999}
}
Works referenced in this record:
Investigation on the effect of Zn on the behaviour of S in the iron bath smelting reduction process
journal, January 1993
- Li, Hong-jie; Tokuda, Masanori
- Steel Research, Vol. 64, Issue 1