Reduction kiln

Details Reduction kiln Reduction kiln

2007-01-23

2010-11-09

Wilson, Gregory A (Department: 3749)

Heating

Tumbler-type rotary - drum furnace

Having combustion products generated in or fed to drum

C432S111000, C432S117000, C266S173000, C075S762000

Reexamination Certificate

active

07828548

ABSTRACT:
Disclosed is a process for reducing metallic oxide or sulfide materials in a rotary kiln and a rotary kiln for reducing such materials. The materials are heated in a reducing atmosphere as they travel along the axial length of the rotary kiln. The materials are discharged from the kiln at a discharge point in the kiln away from its lower material outlet end, wherein the temperature within the kiln at said discharge point is greater than the temperature at the lower material outlet end.

REFERENCES:
patent: 2039062 (1936-04-01), Debuch
patent: 3171638 (1965-03-01), Zimmerley et al.
patent: 3272616 (1966-09-01), Brubaker et al.
patent: 3604692 (1971-09-01), Smithwick
patent: 3847538 (1974-11-01), Rossi
patent: 4427376 (1984-01-01), Etnyre et al.
patent: 4993940 (1991-02-01), McIlvaine
patent: 5908291 (1999-06-01), Dover et al.

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