Specialized metallurgical processes – compositions for use therei – Processes – Process control responsive to sensed condition
Reexamination Certificate
2005-08-09
2005-08-09
Andrews, Melvyn (Department: 1742)
Specialized metallurgical processes, compositions for use therei
Processes
Process control responsive to sensed condition
C423S099000, C423S148000, C432S017000
Reexamination Certificate
active
06926752
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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Metsärinta Maija-Leena
Nyberg Jens
Rytioja Aija
Taskinen Pekka
Andrews Melvyn
Morgan & Finnegan L.L.P.
Outokumpu Oyj
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