Diavik (Slurry Plant)

 

Location

Diavik Diamond Mine
N.W.T., Canada

SIZE / CAPACITY
50 m3/hr slurry
(45 tonnes/hr dry cement)

SERVICES PROVIDED

  • Conceptual Design
  • Structural/Mechanical Engineering
  • Design & Supply of Control System
  • Supply/Fabrication of all Equipment
  • Supervision of Equipment Installation
  • Commissioning and Training

SUPPLIED EQUIPMENT

  • 2000 liter Colloidal Mixer
  • 5500 litre Agitation Tank
  • Two Progressive Cavity Pumps
  • Slurry agitator
  • Automated PLC Control System
  • Touchscreen HMI
  • Pneumatic Control System
  • Related Piping and Valving

The Diavik Diamond Project lies approx. 300 km NE of Yellowknife, NWT. The diamond deposit lies partially under Lac de Gras within the continuous permafrost zone, some 100 km north of the treeline.

As part of the underground mining requirement, a dual purpose paste/rockfill system was designed. Partially ground waste rock (to produce fines) is mixed with crushed waste and a cement slurry to produce a paste which is pumped underground as backfill. The plant is also capable of producing a cemented rockfill (CRF) using the same crushing circuit. Rockfill is discharged into trucks and the cement slurry is sprayed onto the aggregate in the truck bed after which it is delivered to the underground workings.

Team Mixing designed and built the cement slurry preparation part of the overall plant, controlled by its own PLC, but integrated with the overall plant control system. A progressing cavity pump varies the slurry pump rate in response to the aggregate and fines feed into the paste mixer in a continuous process.