METHOD FOR HEAT-TREATING RECYCLINGS CONTAINING OIL AND IRON OXIDE

摘要

The invention relates to a method for heat-treating recyclings containing oi l and iron oxide in a multiple hearth furnace. Said oven has several superpose d tiers. The recyclings containing oil and iron oxide are mixed with a solid reducing agent and continuously fed into the multiple hearth furnace, placed on the top tier and then gradually transferred to the lower tiers. The recyclings are dried on the uppermost tier. The oil is then evaporated and pyrolysed and the reducing agents react with the iron oxide to form directly reduced iron. The directly reduced iron is then discharged together with residues of the reducing agents in the area of the lowest tier of the multip le hearth furnace.