Method and plant for the heat treatment of solids containing iron oxide using a fluidized bed reactor
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United States of America Patent
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Dec 1, 2009
Grant Date -
Jun 21, 2007
app pub date -
Dec 1, 2003
filing date -
Dec 23, 2002
priority date (Note) -
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Abstract
The present invention relates to a method and a plant for the heat treatment of solids containing iron oxide, in which fine-grained solids are heated to a temperature of 700 to 1150.degree. C. in a fluidized bed reactor (8). To improve the utilization of energy, it is proposed to introduce a first gas or gas mixture from below through at least one gas supply tube (9) into a mixing chamber region (15) of the reactor (8), the gas supply tube (9) being at least partly surrounded by a stationary annular fluidized bed (12) which is fluidized by supplying fluidizing gas. The gas velocities of the first gas or gas mixture and of the fluidizing gas for the annular fluidized bed (12) are adjusted such that the Particle-Froude-Numbers in the gas supply tube (9) are between 1 and 100, in the annular fluidized bed (12) between 0.02 and 2, and in the mixing chamber (15) between 0.3 and 30.
First Claim
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International Classification(s)
- 2003 Application Filing Year
- C22B Class
- 159 Applications Filed
- 48 Patents Issued To-Date
- 30.19 % Issued To-Date
Cited Art Landscape
Patent Citation Ranking
- 4 Citation Count
- C22B Class
- 10.42 % this patent is cited more than
- 16 Age
