Method for reducing build-up on a roasting furnace grate
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United States of America Patent
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May 16, 2006
Grant Date -
Apr 1, 2004
app pub date -
Nov 13, 2001
filing date -
Nov 15, 2000
priority date (Note) -
Expired
status (Latency Note)
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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.
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