Method of coal gasification and direct ironmaking and system therefor
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United States of America Patent
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Oct 8, 2013
Grant Date -
Aug 18, 2011
app pub date -
Sep 25, 2009
filing date -
Sep 25, 2009
priority date (Note) -
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Abstract
A system of coal gasification and direct ironmaking attains both heat recovery in a coal-based direct ironmaking process and a reduction in equipment investment in a coal gasification process. A waste heat boiler in the system recovers heat of gas exhausted from a coal gasification furnace. A heater in exhaust gas lines of a heat reduction furnace in the coal-based direct ironmaking process superheats the steam generated by and exhausted from the waste heat boiler. A superheated steam line supplies the steam superheated by the heater as an oxidant to the coal gasification furnace.
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