Method of recovering metals and metal alloys and a plant therefor
CA 1324265 C · Owner: Ottenschlager, Erich · Inventors: Ottenschlager, Erich; Kepplinger, Werner L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a method for recovering a metal or metal alloy in particular a ferro-alloy, by reducing a metal oxide in a reduction zone formed by a coal bed with a reducing gas. To obtain a metal having a high affinity to oxygen the coal bed, is formed by three static bed layers including a bottom layer of degassed coal covering a liquid sump of reduced metal and slag, a middle layer and a top layer. Oxygen or an oxygencontaining gas is blown into the middle layer to form a hot reducing gas, and at a distance thereabove fine-grain oxidic, charging material is introduced into the middle layer. A combustion gas of carbon particles and oxygen or oxygencontaining gas is fed into the top layer.
Read the whole patent
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 November 16, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 16, 2010.
- 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.