Melt Reducing Facility And Method Of Operation Thereof

Abstract: A melt-reducing facility for directly producing molten iron or molten /iron by throwing iron bearing material, carbon and flux into furnace bodies and blowing pure oxygen and/or an oxygen-rich gas therein, wherein a waste heat boiler and a power-generating facility are connected to a plurality of furnace bodies through ducts which can be freely opened and closed, the waste heat boiler being capable of recovering by vaporization the sensible heat and the latent heat of the combustible gases generated from the furnace bodies. The invention is further concerned with a method of operating the melt-reducing facility wherein when, for example, two furnaces are being operated, the secondary combustion rate in the furnaces is increased to decrease the amount of heat of the combustible gases per a furnace and when one furnace is being operated, the secondary combustion rate in the furnace is decreased to double the amount of heat of the combustible gases in one furnace, so that the total amount of heat of combustible gases of the two furnaces remains constant at all times.

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