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

摘要

A method for controlling a flow rate of gas for prereducing ore comprises the steps of prereducing ore in a prereduction furnace having a fluidized bed by use of gas generated in a smelting reduction furnace 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 for controlling a flow rate of gas for prereducing ore comprises a flow passage for introducing gas generated in a smelting reduction furnace into a prereduction furnace and a gas pressure control valve positioned in the flow passage.