Method for reducing iron losses in an iron smelting process

Sarma, Balu; Downing, Kenneth B

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 (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.

Inventors:

Sarma, Balu ^[1]; Downing, Kenneth B ^[2]

Airmont, NY
Greenville, SC

Publication Date:: Fri Jan 01 00:00:00 EST 1999

Research Org.:: AMERICAN IRON & STEEL INST

OSTI Identifier:: 872203

Patent Number(s):: US 5885322

Assignee:: Steel Technology Corporation (Washington, DC)

DOE Contract Number:: FC07-94ID13284

Resource Type:: Patent

Country of Publication:: United States

Language:: English

Subject:: method; 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/

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                    Sarma, Balu, and Downing, Kenneth B. Method for reducing iron losses in an iron smelting process.  United States: N. p., 1999. 
        Web.

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                    Sarma, Balu, & Downing, Kenneth B. Method for reducing iron losses in an iron smelting process.  United States.

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                    Sarma, Balu, and Downing, Kenneth B. 1999.  
        "Method for reducing iron losses in an iron smelting process".  United States.  https://www.osti.gov/servlets/purl/872203.

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@article{osti_872203,

  title        = {Method for reducing iron losses in an iron smelting process},

  author       = {Sarma, Balu and Downing, Kenneth 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 (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.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/872203},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Fri Jan 01 00:00:00 EST 1999},

  month        = {Fri Jan 01 00:00:00 EST 1999}

}

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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
https://doi.org/10.1002/srin.199300980

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Title: Method for reducing iron losses in an iron smelting process

Abstract

Citation Formats

Investigation on the effect of Zn on the behaviour of S in the iron bath smelting reduction process journal, January 1993

Investigation on the effect of Zn on the behaviour of S in the iron bath smelting reduction process
journal, January 1993