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Title: 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):
5,885,322
Application Number:
PAN: 8-823,012
Assignee:
Steel Technology Corp., Washington, DC (United States) PTO; SCA: 320303; 010500; PA: EDB-99:045626; SN: 99002077335
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 = {1999},
month = {3}
}