Method for producing hot sponge iron by introducing hydrocarbon for carburizing into reduction zone
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United States of America Patent
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May 30, 1989
Grant Date -
N/A
app pub date -
Aug 21, 1986
filing date -
Aug 21, 1986
priority date (Note) -
Expired
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Abstract
A method and apparatus for the direct gaseous reduction of iron ore to sponge iron at an elevated temperature suitable for hot briquetting, wherein a hot reducing gas is circulated upwardly through a descending body of iron ore and a make-up reducing gas stream is added to the circulating gas stream. A sponge iron product having a predetermined desired degree of carburization in the range 0.5% to 4% is obtained by adding a controlled flow of natural gas or other methane-containing gas to said make-up gas stream or to said circulating gas stream.
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