Methods and systems for producing high carbon content metallic iron using coke oven gas
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United States of America Patent
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Oct 30, 2018
Grant Date -
Jul 21, 2016
app pub date -
Jan 20, 2016
filing date -
Jan 20, 2015
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Abstract
A method for producing high carbon content metallic iron using coke oven gas, including: dividing a top gas stream from a direct reduction shaft furnace into a first top gas stream and a second top gas stream; mixing the first top gas stream with a coke oven gas stream from a coke oven gas source and processing at least a portion of a resulting combined coke oven gas stream in a carbon dioxide separation unit to form a synthesis gas-rich gas stream and a carbon-dioxide rich gas stream; delivering the synthesis gas-rich gas stream to the direct reduction shaft furnace as bustle gas; using the carbon-dioxide rich gas stream as fuel gas in one or more heating units; and delivering the second top gas stream to the direct reduction shaft furnace as bustle gas.
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