Pressure control in direct smelting process
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United States of America Patent
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Jul 12, 2011
Grant Date -
Dec 31, 2009
app pub date -
Apr 24, 2007
filing date -
Apr 24, 2006
priority date (Note) -
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Abstract
A direct smelting process for producing molten metal from a metalliferous feed material in a direct smelting vessel is disclosed. The process includes using a stream of off-gas from the vessel as a fuel gas in (i) stoves for generating a hot blast of air or oxygen-enriched air for the process and (ii) a waste heat recovery apparatus for generating steam for the process. The process also includes controlling pressure in the vessel by controlling pressure in the off-gas stream while the process is producing molten metal.
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