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:
Apr. 12, 1977
Filed:
Dec. 12, 1974
Applicant:
Inventors:
Stig Arvid Peterson, Skelleftehamn, SW;
Sven Anders Lundquist, Skelleftehamn, SW;
Assignee:
Boliden Aktiebolag, Stockholm, SW;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C22B / ;
U.S. Cl.
CPC ...
75 77 ;
Abstract
Processes are provided for the recovering of crude lead from materials containing lead substantially in the form of oxides and/or sulphates. The processes are carried out in a rotary converter with the rotation axis inclined to the plane of the vertical. In the process the materials containing lead are smelted and reduced while the furnace is rotated. Processes are also provided to separate and recover possible impurities of arsenic, antimony and tin.