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:
Jan. 20, 1981
Filed:
Mar. 05, 1979
Applicant:
Inventor:
Srdjan Bulatovic, Peterborough, CA;
Assignee:
Falconbridge Copper Limited, Toronto, CA;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B03D / ;
U.S. Cl.
CPC ...
201167 ;
Abstract
A method for separating copper sulphides from lead sulphides contained in particulate copper lead sulphide concentrates by a flotation process in which an aqueous alkali metal silicate-alkali metal dichromate reagent solution is added in the flotation step to depress the lead bearing sulphides. The copper lead sulphide concentrate may be obtained from a complex copper-lead-zinc ore, in which case the majority of the zinc is first removed by conventional flotation techniques and the copper lead sulphide concentrate treated with activated carbon prior to addition of the silicate-dichromate reagent solution.