METHOD AND APPARATUS FOR RAPID REDUCTION OF IRON OXIDE IN A ROTARY HEARTH FURNACE

摘要

A METHOD AND APPARATUS FOR PRODUCING DIRECT REDUCED IRON FROM DRY COMPACTS COMPOSED OF IRON OXIDE (16) AND CARBONACEOUS MATERIAL (18) BY FEEDING COMPACTS NO MORE THAN TWO LAYERS DEEP ONTO A HEARTH (36) AND REMOVING ALL THE VOLATILES AND METALLIZING THE COMPACTS BY EXPOSING SAID COMPACTS TO A RADIANT HEAT SOURCE (40) AT A TEMPERATURE OF FROM ABOUT 1315 TO ABOUT 1430°C FOR A TOTAL TIME PERIOD OF ABOUT FOUR TO TEN MINUTES AND PARTIALLY COOLING THE COMPACTS WHILE DISCHARGING THEM FROM THE HEARTH (36).FIGURE 3