2-stage fluidized bed furnace for pre-reducing fine iron ore and method for pre-reducing fine iron ore using the furnace
CA 2211906 C · Owner: Park, Dae Gyu · Inventors: Lee, Ii Ock; Park, Suk In; Park, Dae Gyu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The 2-stage fluidized bed furnace for, pre-reducing a fine iron ore of the present invention comprises a first stage fluidized bed furnace for receiving the fine iron ore from storage hopper, discharging medium/small particles to the upper part thereof, and reducing a coarse particle ore while forming a bubbling fluidized bed; a second stage fluidized bed furnace for receiving the medium/small particles discharged from the upper part of the first stage and reducing it while forming a turbulent fluidized bed; and a first hot cyclone for collecting the small particles contained in the discharged gas from the second stage fluidized bed furnace the first, stage furnace being in an upper …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed December 26, 1996 and granted October 9, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 26, 2016.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 26, 2018.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.