A PROCESS FOR SMELTING FINE-GRAINED ,DIRECT-REDUCED IRON

摘要

A process for smelting fine—grained, direct—reduced iron (DRI) which consists to at least 80% by weight of a grain size of at most 3 mm, in an electric are furnace which contains a bath of malten iron and a foamed s1ag 1ayer on the molten iron, wherein the DRI during operation of the furnace is passed through at least one lance which passes through the roof of the furnace, from above through the aperture of the lance into the foamed slag layer and on to the molten iron, wherein the DRI falls through the lance or lances on to the iron bath solely through the force of gravity and without using a conveying gas, characterised in that each lance aperture is located in the foamed slag layer, and that the proportion of the DRI fed through the lance or lances to the iron bath relative to the total amount of iron material charged is 85 to 100% by weight.