Offered Services

Bench-Scale Testing

Fully equipped flotation laboratories for routine and specialised testwork.

  • Six Denver D-12 laboratory flotation machines.
  • Full range of flotation cells from 1 to 10 litres.
  • Facility to measure and record parameters such as sulphide ion concentration, redox potential, pH, oxygen levels, xanthate concentration, temperature.
  • Procedures for conducting rougher and cleaner¬†rate flotation tests and fitting to rate models.

Pilot Scale Testing

  • An extensive range of modular pilot-scale equipment for use on small (60 kg/h) and large flotation plant runs for parameter investigations and plant design data-gathering exercises.
  • Autogenous mill (a bleed stream is fed directly into the flotation plant).
  • A wide range of pilot-scale mills, that can be run in rod or ball mode, with capacities from 250 to 1000 kg/h.
  • Two smaller mills, 0.6m diameter by 1 m long, are used for smaller scale testwork.
  • Stirred mill detritor.
  • A range of classification systems (microscreens, spiral classifiers, sieve bends, and cyclones), conditioner types (Sala and Denver), and peristaltic pumps sizes for reagent delivery.
  • Flotation cells for specific on-site applications.
  • One 18L OK flash flotation cell.
  • One Maxwell-type cell
  • Two modified single Sala 80L cells with extra large impellers.
  • Six 180L tank cells.
  • Jameson cells and Multotech column flotation cells can be hired as required.
  • Flotation cells, modular, for general work.
  • Eight banks of 80L Sala cells for rougher and scavenger flotation, each bank comprising four or six cells, all equipped with automatic level controllers.
  • Six banks of 30L Sala cells, usually used for cleaner flotation, each bank consisting of two, four, or six cells.
  • Six banks of Denver 11L cells, and three of 3L cells.

A full range of in-house analytical facilities is available, with turnaround times of between 3 and 8 hours. Plant runs can be scheduled for periods ranging from a few hours to continuous runs over several days.

A dedicated, experienced team is available to run the pilot plant and to manually measure all plant parameters. The plant is usually sampled every hour manually, and the data are processed through commercial mass-balancing package

The pilot plant is set up so that air flowrates and bubble sizes in the cells can be measured. This is useful for modelling purposes. The plant is controlled via the Mintek FloatStar system, which reduces start-up time and allows tight level control at setpoints. This reduces variations in the data due to plant disturbances, and allows study of the effects of small level changes.