Patent ID: 8298317
Filing Date: 2012-10-30
Classification: C21B,C21C,C22B,Y02P,Y02W

Abstract:
1. A process that includes the steps of: (a) producing molten steel and molten steelmaking slag in a steelmaking vessel, the steelmaking slag including iron units and flux units; and (b) producing molten iron in a direct smelting process in a direct smelting vessel containing a molten bath of iron and iron-making slag by supplying iron ore or pre-treated iron ore and carbonaceous material to the direct smelting vessel as a part of feed material requirements of the direct smelting process, by injecting an oxygen-containing gas into the vessel to combust reaction gases released from the bath and by using a substantial portion of the steelmaking slag from step (a) as part of flux unit requirements for the direct smelting process and thereby smelting the iron ore or pre-treated iron ore and iron units to produce molten iron, wherein the direct smelting process includes controlling conditions within the direct smelting vessel to substantially partition phosphorous to the iron-making slag.