Title:
METHOD FOR REDUCING BUILD-UP ON A ROASTING FURNACE GRATE
Document Type and Number:
WIPO Patent Application WO2002040724
Kind Code:
A8
Abstract:
The present invention relates to method, which helps to reduce and remove the build-up forming on the grate of a fludized-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.
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Inventors:
TASKINEN PEKKA (FI)
METSAERINTA MAIJA-LEENA (FI)
JAERVI JUHA (FI)
NYBERG JENS (FI)
SIIRILAE HEIKKI (FI)
METSAERINTA MAIJA-LEENA (FI)
JAERVI JUHA (FI)
NYBERG JENS (FI)
SIIRILAE HEIKKI (FI)
Application Number:
PCT/FI2001/000983
Publication Date:
February 20, 2003
Filing Date:
November 13, 2001
Export Citation:
Assignee:
OUTOKUMPU OY (FI)
TASKINEN PEKKA (FI)
METSAERINTA MAIJA-LEENA (FI)
JAERVI JUHA (FI)
NYBERG JENS (FI)
SIIRILAE HEIKKI (FI)
TASKINEN PEKKA (FI)
METSAERINTA MAIJA-LEENA (FI)
JAERVI JUHA (FI)
NYBERG JENS (FI)
SIIRILAE HEIKKI (FI)
International Classes:
C22B1/10; C22B19/02; (IPC1-7): C22B1/10
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