Innovative dry handling and wet stacking technique used

Queensland Fertilizer Project - Gypsum Handling & Stacking System
Queensland, Australia
WMC Fertilizers
Industry Sector
Industrial; Minerals & Metals
Industrial Minerals
Service Area
Environment & Sustainability; Infrastructure; Project Delivery; Process Plants
Construction Support Services; Basic Engineering; Detailed Design; Program Management; Materials Handling

Detailed design and part procurement of materials handling system and HDPE lined storage ponds for containment of gypsum by-product in ‘stacks’. The system comprised conveyors, stacker and reslurrying systems, drainage systems, stormwater diversions, decant and water re-use systems.

Ausenco’s scope included the options innovation and analysis; preparation of flowsheets, P&ID’s and control philosophy; management of and interaction with the Gypsum stack detailed design; interaction with the relevant government authorities including preparation/compilation of technical component of WMCF submissions relating to gypsum stacking and handling; detailed engineering design and preparation of technical specifications; technical evaluations for procurement by the client and partial procurement of equipment; compilation of construction scope of work and construction assistance; and engineering and operational support to WMCF for the first 16 months of system operation.


  • First use of innovative dry handling and wet ‘stacking’ technique in Australia
  • Provision of operational management during commissioning and the first 3 months of production ramp-up
  • Process design to facilitate conversion gypsum from hemihydrate to dehydrate form
  • Creek system diversion to cater for major rainfall events