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US 4,290,587 AGranted
Ore treating apparatus
AssigneePullman Incorporated
InventorLarry A. Coccia
Life of this patent
Estimating the term…
Abstract
An apparatus for the gaseous reduction of iron ore to sponge iron includes upper, intermediate and lower vessel chamber portions with the intermediate and lower chamber portions having a frusto-conical shape. An annular baffle projects from the intermediate chamber into the lower chamber and provides a configuration for cooling without the requirement of an internal coil type water cooling system.
Claims20
In an apparatus for the gaseous reduction of metal oxide ore including a vessel having an outer wall defining
- an upper cylindrical chamber portion
- an intermediate chamber portion;
- and
- a lower chamber portion
- said upper chamber portion including a charging opening, a reduction gas inlet means and a hot gas inlet means,
- said intermediate chamber portion being formed by a first frusto-conical portion of said cylindrical outer wall and having at its lower end a relatively narrower throat portion,
- said lower chamber portion including a second frusto-conical wall portion at its upper end being of a greater diameter in cross-section than said upper chamber portion, and an upper wall being of frusto-conical shape, converging upwardly, inwardly and being connected to the upper portion of said second frusto-conical cylindrical wall portion and being connected to said narrower throat portion thereby enhancing cooling of said metal oxide ore by reducing gas independent of water cooling,
- a plurality of gas outlets provided in said connecting upper wall to direct gas from said reactor outwardly of said vessel, and
- said second frusto-conical cylindrical wall portion having at its lower end a relatively narrow discharge portion.
6 more elements
A process for reduction of the iron ore to its metalic iron state comprising the steps of:
- charging the vessel with the iron ore,
- introducing a hot gas in the upper portion of the reactor vessel in two separate stages and allowing it in each stage to traverse downwardly the extend of the reactor vessel and out a plurality of gas outlets in the connecting upper wall connecting the lower and intermediate portions of the reactor,
- discontinuing the introduction of the hot gas into the reactor vessel,
- introducing a reducing cooler gas into the upper portion of the reactor vessel and allowing the gas to stream through the charge cooling the charge and reducing the iron oxide to iron, the gas traversing downwardly the length of the reactor vessel and out through a plurality of gas outlets in the connecting upper wall connecting the lower and intermediate portions of the reactor, and
- discharging the metalic iron from the reactor vessel.
2 more elements
Dependencies are inferred from the claim text.