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:
Aug. 16, 1977
Filed:
Aug. 18, 1976
Denby Harcourt Ward, Port Pirie, AU;
James Dixon Iley, Port Pirie, AU;
The Broken Hill Associated Smelters Proprietary Limited, Melbourne, AU;
Abstract
Apparatus for debismuthising lead containing one or more alkaline earth metals or alloys thereof, including a separation vessel having independently temperature-controlled upper liquation and lower separation zones, devices for adding a reagent selected from the group consisting of antimony, arsenic and alloys containing antimony and/or arsenic to the input lead to form a crust/bullion mixture and continuously and directly introducing the crust/bullion mixture into the lower separation zone of the vessel at a point below the upper liquation zone, the crust particles being separated from the bullion in the lower separation zone and moving upwardly in the vessel, the entrained lead being separated from the crust particles in the upper liquation zone and moving downwardly in the vessel, the enriched crusts being removed from the upper surface of the material in the vessel, and the debismuthised product lead being withdrawn from near the lower end of the lower separation zone. The input lead and the reagent may be mixed in a mixing chamber in the separation vessel or in one or more separate mixing pots.