Using oxygen for leaching
CA 1269252 C · Owner: Elmore, Carl L. · Inventors: Elmore, Carl L.; Mitchell, Phillip; Brison, Robert J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Metal bearing ore, such as gold ore or silver ore, is subjected to a leaching action utilizing a cyanide solution liquid containing a large amount of oxygen. The ore is slurried to form a liquid slurry (flocculating material and fibers may be added to lock the particlized ore in a stable network in the slurry) and is passed downwardly in a leaching reactor. The cyanide solution is deaerated, and then oxygen gas is introduced under pressure to the cyanide solution and preferably is mixed into the solution utilizing an in-line mixer downstream of a pump to essentially saturate the cyanide solution with oxygen. About 5-10 times the amount of oxygen can be provided in the liquid, in this manner …
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 May 22, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 22, 2007.
- 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.