Patents Assigned to Anschutz Mining Corporation
  • Sequential flotation of sulfide ores
    Patent number: 4460459
    Abstract: A sequential flotation process for the recovery of high-grade concentrates of copper, lead and cobalt-nickel from sulfide ores is provided. A primary grind ore pulp is conditioned with SO.sub.2 as H.sub.2 SO.sub.3 under intense aeration, and the conditioned pulp subjected to sequential flotation, with regrinding and conditioning of a copper rougher concentrate obtained in the first flotation step for copper.
    Type: Grant
    Filed: February 16, 1983
    Date of Patent: July 17, 1984
    Assignee: Anschutz Mining Corporation
    Inventors: Douglas R. Shaw, John F. Spisak, Jerome P. Downey, Gary E. Butts