The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 12, 2020
Filed:
May. 03, 2016
Outotec (Finland) Oy, Espoo, FI;
Akusti Jaatinen, Espoo, FI;
Harri Talvensaari, Nummela, FI;
OUTOTEC (FINLAND) OY, Espoo, FI;
Abstract
Provided herein is a process of fire refining blister copper, comprising the steps of (a) providing molten blister copper into an anode furnace; (b) when sulfur concentration of the molten blister copper provided in step (a) is above a first prescribed target value, oxidizing sulfur in the molten blister copper by blowing oxygen containing gas into the molten blister copper until the first prescribed target value has been reached; (c) subsequently lowering the sulfur and oxygen content in blister copper by blowing inert gas into the molten blister copper until a second prescribed target value has been reached, wherein the inert phase (c) is continued until the second prescribed target value of the oxygen concentration is below 4000 ppm, and the second prescribed target value of the sulfur concentration is below 500 ppm; (d) when certain condition(s) occur, subsequently reducing oxygen in the blister copper; and (e) optionally casting.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile