OPERATING FURNACE OF MELT REDUCTION FURNACE

PURPOSE:To accelerate reduction with a min. amt of flux and to discharge smoothly slag in a method for charging powder ore and flux to a titled furnace contg. a C contg. solid reducing agent and provided with plural upper and lower stages positioned near a tuyere by blowing specifically the flux. CONSTITUTION:A C contg. solid reducing agent is charged into a vertical melt reduction furnace 1 to form a packed bed. Powder ore and a flux for accelerating the reduction thereof are supplied by a device 7 to a fluidized preliminary reduction furnace 6, where the ore is preliminarily reduced and heated by using the high temp. waste gas generated in the furnace 1. The preliminarily reduced ore and flux are transferred through a discharging port 8 to the upper and middle tuyeres 3, 4 in the lower part of the furnace and are blown together with the hot air from a hot stove 11 into the furnace 1. These materials are immediately melted, and while the molten material drops in the reducing agent packed bed in the lower part of the furnace 1, the materials are reduced and the molten metal and slag are formed. A flux for adjusting the final slag component in the hopper 9 is blown together with the hot air through a tuyere 5 into the furnace 1 to discharge the slag smoothly. The molten metal is melted together with the flux and is finally accumulated in the hearth part. The molten metal is properly tapped through a discharging port 10.