Method and installation for the cooling of reduced material such as fine grained ore
AssigneeKlockner-Humboldt-Deutz Aktiengesellschaft
InventorsAlfred Kryczun, Theodor Manshausen
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Abstract
Method and apparatus for cooling hot reduced material output from a reduction furnace without exposing the material to oxygen in the air. A fluid-bed-cooler which receives the heated, reduced, material from the reduction furnace contains cooling pipes through which a cooling liquid is passed for indirectly cooling the reduced material. Additionally, the cooler is connected to a positive pressure reduction gas recirculating distribution system which continually passes cooled and cleaned oxygen-free reduction gases over the heated, reduced, material to be cooled. Any losses due to leaks in the recirculating reduction system, are replaced by oxygen-free reduction gas supplied from an exhaust gas port of the reduction furnace.
Claims1
An in-line method of cooling reduced fine grained ore, from a reduction process, where quantities of oxygen free reduction gases are generated by the process which comprises the steps of:
- cooling and cleaning a portion of the oxygen free reduction gases,
- supplying reduced ore at a selected rate to an enclosed cooling chamber,
- continuously recirculating at a positive pressure the cooled and cleaned oxygen free reduction gases through the reduced ore in the enclosed cooling chamber,
- passing the ore to be cooled over a set of closed cooling pipes in the enclosed cooling chamber,
- circulating cooling liquid through the closed cooling pipes,
- removing the cooled ore from the enclosed chamber at a selected rate,
- removing the cooling gases from the enclosed cooling chamber and recleaning and recooling them, and
- replacing any oxygen free reduction gases lost during the recirculation and cooling process from the quantity generated by the reduction process.
Dependencies are inferred from the claim text.