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Gold recovery plant, Kokpatas, Uzbekistan

GoldBeneficiation & SortingHydrometallurgy

Reconstruction of a gold recovery plant based on the bio-oxidation process

Customer Navoi Mining  and Metallurgical Combine (NGMK), Uzbekistan


  • 1st stage 2009
  • 2nd stage 2011


  • Full project planning and coordination of the reconstruction and expansion of a gold recovery plant
  • Supply of main components

Scope of supply 

  • Hydrocyclone-plant ContiClass®System
  • Flotation 
  • Thickening
  • Counter-current washing and neutralisation 
  • Process air generation via turbo compress for "BIOX®*"-process 
  • Plants for preparation and dosing of chemicals for flotation 
  • Cooling tower systems for cooling water for process air and  for cooling of "BIOX®"-reactors 
  • Pumping station for "BIOX®"-feed
  • Full automation and setting-up of process control system

Technical data

Capacity: 3.2 Mio. tons of ore/year

    Customer benefits

    • Increasing efficiency of gold extraction from sulphide ores which are difficult to treat
    • Optimisation of flotation ore charge for BIO-Oxidation (BIOX®)
    • The sulfur-oxidizing *BIOX-process - according to the technologies of company BIOMIN -  is one hundred thousand times faster by using micro-organisms in an oxygen environment than under conventional conditions 

    Project highlight

    tons of ore per year