Method of smelting reduction of ores containing metal oxides
CA 1338099 C · Owner: Kawasaki Jukogyo Kabushiki Kaisha · Inventors: Murakami, Keikichi; Yajima, Kenichi; Kishimoto, Mitsuharu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Metal oxide ore is subjected to smelting reduction to obtain the molten metal by a method which comprises prereducing said ore in solid state in a prereduction furnace, thereafter melting said ore and carrying out final reduction thereof in a smelting reduction furnace and at the same time introducing gas generated in said smelting reduction furnace and having reductive capability into said prereduction furnace the rate of, prereducing said ore in said prereduction furnace being controlled at a value with a maximum of the order of 33 percent for raising the rate of utilization of energy to a maximum limit.
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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
- Granted March 5, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 5, 2013.
- 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.