Operating a blast furnace using dried top gas

Patent · Tue Aug 10 00:00:00 EDT 1993

OSTI ID:6320803

Kundrat, D M

A method is described of operating a blast furnace, comprising: introducing into the top of the furnace a charge containing metal oxide, coke and flux, collecting a top gas CO, H[sub 2], carbon dioxide and water from the furnace, increasing the reducing potential of said collected top gas by removing water but without removing carbon dioxide from at least a portion of said collected top gas thereby forming a dried top gas, heating said dried top gas to form a heated dried top gas, introducing said heated dried top gas into the lower half of the stack of the furnace at a position above which said coke is not reactive and introducing an oxygen-containing gas and a hydrogenaceous fuel into the bosh of the furnace whereby said metal oxide is reduced to a molten metal using said heated dried top gas.

• Assignee: Armco Inc., Middletown, OH (United States)
• Patent Number(s): US 5234490; A
• Application Number: PPN: US 7-799790
• OSTI ID: 6320803
• Resource Relation: Patent File Date: 29 Nov 1991
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
BLAST FURNACES
OPERATION
COAL GAS
COMBUSTION
DRYING
CARBON DIOXIDE
CARBON MONOXIDE
COKE
HEATING
HYDROGEN
METALS
OXIDES
REDUCTION
WATER VAPOR
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHEMICAL REACTIONS
ELEMENTS
FLUIDS
FURNACES
GASES
NONMETALS
OXIDATION
OXYGEN COMPOUNDS
PYROLYSIS PRODUCTS
THERMOCHEMICAL PROCESSES
VAPORS
010500* - Coal
Lignite
& Peat- Products & By-Products