PROCESS FOR PRODUCTION OF GRANULAR METALLIC IRON AND EQUIPMENT FOR THE PRODUCTION

A process for producing granular metallic iron by subjecting a raw material mixture comprising both an iron oxide-containing substance and a carbonaceous reducing agent to reduction, which comprises the step of charging the raw material mixture onto the hearth of a shifting-hearth heating/reducing f...

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Bibliographic Details
Main Authors TOKUDA KOJI, ITO SHUZO, KIKUCHI SHOICHI
Format Patent
LanguageEnglish
Published 22.06.2009
Subjects
BLASTING
CHEMISTRY
FURNACES
FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL
HEATING
KILNS
LIGHTING
MANUFACTURE OF IRON OR STEEL
MECHANICAL ENGINEERING
METALLURGY
METALLURGY OF IRON
OPEN SINTERING OR LIKE APPARATUS
OVENS
RETORTS
WEAPONS
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Summary:A process for producing granular metallic iron by subjecting a raw material mixture comprising both an iron oxide-containing substance and a carbonaceous reducing agent to reduction, which comprises the step of charging the raw material mixture onto the hearth of a shifting-hearth heating/reducing furnace, the step of reducing the iron oxides contained in the raw material mixture with the carbonaceous reducing agent through heating to form metallic iron, melting the metallic iron, and then condensing the molten metallic iron into a granular one while separating the molten metallic iron from slag generated as by-product, and the step of solidifying the resulting metallic iron by cooling, wherein the heating/reducing step is accompanied with the step of controlling the flow rate of atmospheric gas in a prescribed zone of the furnace to a level within a prescribed range. High-quality granular metallic iron can be produced by the process.
Bibliography:Application Number: KR20097009789