Method for reducing build-up on a roasting furnace grate

Details Method for reducing build-up on a roasting furnace grate Method for reducing build-up on a roasting furnace grate

2006-05-16

2006-05-16

Kastler, Scott (Department: 1742)

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

C075S387000, C075S447000

Reexamination Certificate

active

07044996

ABSTRACT:
The present invention relates to method, which helps to reduce and remove the build-up forming on the grate of a fluidized-bed furnace in the roasting of fine-grained material such as concentrate. The concentrate is fed into the roaster from the wall of the furnace, and oxygen-containing gas is fed via gas nozzles under the grate in the bottom of the furnace in order to fluidize the concentrate and oxidize it during fluidization. Below the concentrate feed point, or feed grate, the oxygen content of the gas to be fed is raised compared with the oxygen content of the gas fed elsewhere.

REFERENCES:
patent: 2813015 (1957-11-01), Thornhill
patent: 2825628 (1958-03-01), Johannsen et al.
patent: 4409101 (1983-10-01), Salikhov et al.
patent: 5026269 (1991-06-01), Ruottu
patent: 6641392 (2003-11-01), Siirila
patent: 6814571 (2004-11-01), Nyberg et al.
Abstract, Accession No. 1976-04921X, Patent No. SU 455232, Mar. 26, 1975.
Abstract, Accession No. 1992-174427, Patent No. SU 1659501, Jun. 30, 1991.
Abstract, Accession No. 1994-143331, Patent No. SU 1797681, Feb. 23, 1993.

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