Patents Assigned to SIRCH GROUP (PTY) LTD.
  • Method of recovering base metals from low grade ores and residues
    Patent number: 10724117
    Abstract: A method of recovering a metal from a low-grade ore which is subjected to cyanide leaching to produce a PLS which contains a metal cyanide which is removed from the PLS by ultrafiltration and nano-filtration, and then acidified and sulphidised to produce a metal sulphide from which the metal is extracted, and hydrogen cyanide which is recycled to the cyanide leaching step.
    Type: Grant
    Filed: June 18, 2015
    Date of Patent: July 28, 2020
    Assignee: SIRCH GROUP (PTY) LTD.
    Inventors: Nicholas Conradie, Marthie Kotze