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Title: Lance for fuel and oxygen injection into smelting or refining furnace

Abstract

A furnace for smelting iron ore and/or refining molten iron is equipped with an overhead pneumatic lance, through which a center stream of particulate coal is ejected at high velocity into a slag layer. An annular stream of nitrogen or argon enshrouds the coal stream. Oxygen is simultaneously ejected in an annular stream encircling the inert gas stream. 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 to react with carbon monoxide gas rising from slag layer, thereby adding still more heat to the furnace. 7 figures.

Inventors:
Issue Date:
OSTI Identifier:
6681005
Patent Number(s):
5374297 A
Application Number:
PPN: US 8-151007
Assignee:
Steel Technology Corporation, Washington, DC (United States) PTO; EDB-95-026825
DOE Contract Number:  
FC07-89ID12847
Resource Type:
Patent
Resource Relation:
Patent File Date: 12 Nov 1993
Country of Publication:
United States
Language:
English
Subject:
01 COAL, LIGNITE, AND PEAT; BLAST FURNACES; FUEL FEEDING SYSTEMS; COAL; COMBUSTION; PNEUMATIC TRANSPORT; DESIGN; SMELTERS; IRON ORES; REDUCING AGENTS; SMELTING; CARBONACEOUS MATERIALS; CHEMICAL REACTIONS; ENERGY SOURCES; FOSSIL FUELS; FUEL SYSTEMS; FUELS; FURNACES; MATERIALS; ORES; OXIDATION; THERMOCHEMICAL PROCESSES; TRANSPORT 010500* -- Coal, Lignite, & Peat-- Products & By-Products

Citation Formats

Schlichting, M.R. Lance for fuel and oxygen injection into smelting or refining furnace. United States: N. p., 1994. Web.
Schlichting, M.R. Lance for fuel and oxygen injection into smelting or refining furnace. United States.
Schlichting, M.R. Tue . "Lance for fuel and oxygen injection into smelting or refining furnace". United States.
@article{osti_6681005,
title = {Lance for fuel and oxygen injection into smelting or refining furnace},
author = {Schlichting, M.R.},
abstractNote = {A furnace for smelting iron ore and/or refining molten iron is equipped with an overhead pneumatic lance, through which a center stream of particulate coal is ejected at high velocity into a slag layer. An annular stream of nitrogen or argon enshrouds the coal stream. Oxygen is simultaneously ejected in an annular stream encircling the inert gas stream. 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 to react with carbon monoxide gas rising from slag layer, thereby adding still more heat to the furnace. 7 figures.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1994},
month = {12}
}