Comminution Testing Comminution Testing
Core Group has extensive experience in conventional ball and rod mill grinding, as well as stirred bead ultrafine grinding. The laboratory can carry out comminution testwork ranging from 0.5 kg batch grinding tests up to 500 kg per hour continuous pilot plant testing. The latter features a 4.5 m x 30 cm belt conveyor and a 1 mfeed hopper which is mounted on a 3 t platform load cell for feed rate monitoring and control.

Our Equipment

Ultrafine grinding duties for a wide range of sample sizes can be achieved using an M4 IsaMillTM, a laboratory Metprotech mill (with a range of grinding chambers) and an English China Clay mill.  Core is accredited by Glencore Technology to perform IsaMillTM ‘Signature Plot’ grinding procedures suitable for IsaMillTM sizing and design purposes. The laboratory has a wide range of particle characterisation tools to assist in the analysis of mineral grinding. These include laboratory Endecotts screens and rotap shakers, Kason screens and screen shaker for larger samples, Malvern laser diffraction particle size analyser and Brookfield and Bohlin viscometers.

Selected project experience:

Nickel Laterite Comminution Project, Queensland Nickel, Queensland

Hawsons Iron Ore Project, Carpenteria Exploration, New South Wales

Gold-Zinc Project, Pueblo Viejo Dominicana Corporation, Dominican Republic

Equipment and facilities available for

laboratory and pilot scale testing include:

Pilot Plant

  • Continuous 1 m x 1.2 m Ball Mill and 0.5 m x 1 m Regrind Ball Mill
  • Continuous IsaMillTM Netzsch and Metprotech pilot plant ultrafine grinding mills
  • Warman and Sala slurry pumps and hydrocyclones
  • Malvern Mastersizer 2000 (particle size analyser), on site XRF, AAS and ICP-OES


  • 250 mm Jaw and 150 mm rollers crusher, disc and ring pulveriser
  • Stainless steel, mild steel rod mills and ceramic ball mills
  • IsaMillTM, Netzsch, Metprotech (pin mill) and Svedala/ECC Mills for ultrafine grinding
  • Sample splitting and blending equipment