Process for the production of steel from fine ore hot briquetted after fluidized bed reduction
OwnerRalph Weberinventor
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Abstract
Fine ore is reduced in a circulating fluidized bed by a reduction gas in the presence of fine coal, the discharged mixture of iron sponge particles and fine coal is subjected to hot compacting and then fed to a melting vessel in which oxygen is injected into the molten material through nozzles. The melting vessel can also be supplied with scrap which has been pre-heated by the hot waste gases from the melting vessel, in a scrap pre-heater which is fitted onto the melting vessel.
Claims7
A process for the production of steel from fine ore comprising the step of reducing the fine ore in the presence of coal in a fluidized bed of a reduction unit together with a reduction gas to form iron sponge particles, and passing the particles to a melting vessel in which they are melted with a feed of coal and oxygen and are refined to produce steel, the improvement in said process comprising the step of subjecting a mixture of iron sponge particles and fine coal which is discharged from the reduction unit to hot compacting to form hot iron sponge-coal briquettes before said briquettes are introduced into the melting and refining vessel.
Dependencies are inferred from the claim text.