Method of producing blister copper from copper raw material containing antimony
CA 1111658 A · Owner: Boliden Aktiebolag · Inventors: Eriksson, Bengt S.; Petersson, Stig A.; Fridfeldt, Arne C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of producing blister copper from raw material containing antimony. The invention is characterized in that a slag is separated from copper matte formed by smelting the raw material. Thereafter the matte is brought into contact under violent, agitation preferably in a rotary converter of the Kaldo type with a substantially inert gas in a quantity sufficient to reduce by volatilization the antimony content of the copper matte and, possibly, also the content of other impurities such as bismuth, arsenic and zinc to a level acceptable when performing the subsequent converting process so as to obtain the, desired blister copper product preferably a maximum content, of antimony 0.04 …
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 3, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 1998.
- 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.