Dead roast-oxide flash reduction process for copper concentrates
CA 1202184 A · Owner: Exxon Research And Engineering Company · Inventors: Hoffmann, James E.; Subramanian, Kohur N.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention contemplates providing a finely divided copper calcine and thereafter subjecting the calcine to reduction flash smelting. Indeed significant processing advantages are achieved by dead roasting a finely divided copper concentrate especially, in a fluid bed reduction zone and thereafter subjecting, the resulting calcine to reduction flash smelting. Gases from the dead roaster and the flash smelter are combined for SO2 recovery in an acid plant.
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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 25, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 25, 2003.
- 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.