Method for the stabilization of a fluidized bed in a roasting furnace
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United States of America Patent
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Aug 9, 2005
Grant Date -
Mar 18, 2004
app pub date -
Nov 13, 2001
filing date -
Nov 15, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
This invention relates to a method for stabilizing a fluidized bed used in roasting by adjusting the oxygen content of the roasting gas in the bed. The fine-grained material for roasting is fed into the furnace above the fluidized bed and the roasting gas, which causes the fluidizing, is fed into the bottom of the furnace through a grate. In this method, the total amount of oxygen in the roasting gas to be fed and the average total oxygen requirement of the material to be roasted are calculated and the ratio between them regulated so that the oxygen coefficient in the bed is over 1.
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