Process and plant for the production of iron, in particular steel
CA 2345470 A1 · Owner: Voest-Alpine Industrieanlagenbau Gmbh · Inventors: Standler, Gerhard; Wiesinger, Horst; Kropf, Alfred
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for producing iron especially steel, from , ferriferous oxides. According to said method an H2 smelting reduction is , carried out in a smelting vessel (1) and H2-containing gas and energy are supplied. The ferriferous oxides are preheated and prereduced in at least one preheating and prereduction area (11a) using a gas containing H2 and H2O which is drawn out of the smelting vessel (1) and then conveyed to the preheating and prereduction area (11a) optionally after a gas containing more than 50 %, preferably more than 90 % H2 has been added. The preheated and prereduced ferriferous oxides are then introduced into the smelting vessel (1), where they …
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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 August 16, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 16, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 16, 2021.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.