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Title: Fuel and oxygen addition for metal smelting or refining process

Abstract

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.

Inventors:
 [1]
  1. (Chesterton, IN)
Issue Date:
Research Org.:
American Iron and Steel Inst., Pittsburgh, PA (United States)
OSTI Identifier:
869610
Patent Number(s):
5366537
Assignee:
Steel Technology Corporation (Washington, DC) IDO
DOE Contract Number:  
FC07-89ID12847
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
fuel; 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; /75/266/

Citation Formats

Schlichting, Mark R. Fuel and oxygen addition for metal smelting or refining process. United States: N. p., 1994. Web.
Schlichting, Mark R. Fuel and oxygen addition for metal smelting or refining process. United States.
Schlichting, Mark R. Sat . "Fuel and oxygen addition for metal smelting or refining process". United States. https://www.osti.gov/servlets/purl/869610.
@article{osti_869610,
title = {Fuel and oxygen addition for metal smelting or refining process},
author = {Schlichting, Mark R.},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {1}
}

Patent:

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