Method for producing directly reduced iron in a layered furnace
AssigneePaul Wurth S.A.
InventorsRomain Frieden, Thomas Hansmann, Marc Solvi
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Abstract
A method for producing reduced iron in a layered furnace which includes several superimposed layers. Ore is continuously fed into the layered furnace, deposited on the uppermost layer, and gradually transferred to the lower layer. A reducing agent is deposited on the uppermost layer and/or layers thereunder and is reacted with the ore in order to form directly reduced iron. The directly reduced iron and reducing agent residues are discharged in the vicinity of the lowest layer of the furnace.
Claims13
A process for production of directly reduced iron in a multi-stage furnace having a plurality of stages in which a higher temperature prevails in lower stages of the plurality of stages, said process comprising the steps of:
- continuously introducing ore into the multi-stage furnace on a top stage of the plurality of stages;
- gradually transferring the ore to the lower stages;
- depositing at least one of solid and liquid reducing agents on at least one of the top stages and one of stages underneath the top stage;
- feeding a gas containing oxygen through a bottom half portion of a side wall of the multi-stage furnace into the multi-stage furnace;
- reacting the gas containing oxygen with part of the at least one of solid and liquid reducing agents to form a reducing gas;
- reacting the reducing gas with the ore to form directly reduced iron;
- and
- discharging the directly reduced iron together with residues of the at least one of solid and liquid reducing agents from a bottom stage area of the multi-stage furnace.
Dependencies are inferred from the claim text.