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:
Oct. 10, 2006
Filed:
Dec. 07, 2001
Applicant:
Sigmund Fugleberg, Turku, FI;
Inventor:
Sigmund Fugleberg, Turku, FI;
Assignee:
Outokumpu Technology Oy, Espoo, FI;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C01G 1/00 (2006.01); C01G 9/00 (2006.01); C01G 49/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention relates to a method for the hydrolytic precipitation of iron as jarosite from a sulphate-containing solution in connection with zinc recovery from zinc calcine. The recovey contains neutral leach, ferrite leach, zinc electrolysis and iron precipitation stages. The ferrite included in the calcine is leached with return acid of the electrolysis after which the iron present in ferrous form is neutralized and routed to an iron precipitation stage, where the iron is oxidised to the trivalent form using an oxygen-containing gas. Also present in the precipitation stage arc Na, K or NHions and jarosite nuclei.