METHOD FOR CONTROLLING A FLOW RATE OF GAS FOR PREREDUCING ORE AND APPARATUS THEREFOR

The invention relates to a method for controlling a flow rate of gas for prereducing ore comprising the steps of prereducing ore in a prereduction furnace (2) having a fluidized bed (5) by use of gas generated in a smelting reduction furnace (1) and controlling a pressure of gas generated in the sme...

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Bibliographische Detailangaben
Hauptverfasser:	TATSURO ARIYAMA, MASAHIRO MATSUO, SHINICHI ISOZAKI, KENZO YAMADA, GENJI KANATANI
Format:	Patent
Sprache:	eng
Schlagworte:	CHEMISTRY MANUFACTURE OF IRON OR STEEL METALLURGY METALLURGY OF IRON
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Beschreibung
Zusammenfassung:	The invention relates to a method for controlling a flow rate of gas for prereducing ore comprising the steps of prereducing ore in a prereduction furnace (2) having a fluidized bed (5) by use of gas generated in a smelting reduction furnace (1) and controlling a pressure of gas generated in the smelting reduction furnace and introduced into the prereduction furnace, an actual flow rate of gas introduced into the prereduction furnace being controlled. An apparatus is also described for controlling a flow rate of gas for prereducing ore, and comprises a flow passage (3) for introducing gas generated in a smelting reduction furnace (1) into a prereduction furnace (2) and a gas pressure control valve (l6) positioned in the flow passage.