Method for concentrating ore slurries by means of intensive agitation conditioning and simultaneous flotation, and an apparatus for the same
CA 2070146 C · Owner: Lilja, Launo L. · Inventors: Makitalo, Valto J.; Nyman, Bror G.; Jounela, Seppo S.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a method for concentrating a certain mineral fraction attached to air bubbles from a slurry to the foam layer accumulated on the surface so that, the concentration takes place in three different mixing zones. The apparatus of the invention is formed of a colon-like flotation arrangement and of flow guides a flow, attenuator and an agitator belonging thereto. The flotation reactions are created in the bottom zone wherefrom air, bubbles and mineral particles carried by them are directed in a controlled fashion onto the surface of the apparatus. The flotation apparatus is so designed that a strong, agitation in the bottom zone can be used without causing …
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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 June 1, 1992 and granted July 21, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 1, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 1, 2014.
- 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
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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.