Core Resources has successfully completed a three-week High Density Solids (HDS) neutralisation pilot plant programme aimed at developing benchmark data for a client’s copper leach projects. This programme investigated various process conditions in a continuous pilot plant circuit.
Programme Objectives and Focus
The pilot trial focused on the precipitation of iron, aluminium, and arsenic from a sulphate system, with particular attention to the dewatering characteristics of the neutralised slurries. The morphology of precipitate crystals directly affects the dewatering characteristics of thickened slurries. To optimise crystal formation, several process conditions were designed and tested, including varying pH levels across the neutralisation circuit, recycle ratios, and leach residence times.
Continuous Pilot Plant Operation
The pilot plant operated in continuous mode, examining the effects of recycling from different points within the circuit. Campaigns were run without halting feed liquor and continued until steady state was achieved after each condition change. Prior to the programme, newly developed single reactor continuous testwork was conducted at Core to provide preliminary screening and development of baseline conditions and dewatering data.
Core’s Role in Process Development
Core played a pivotal role by providing process engineering, design, and process modelling services to maximise the value of the data obtained. The programme leveraged Core’s integrated testwork and engineering capabilities to assist the client in developing their projects.
This successful pilot plant programme underscores Core Resources’ commitment to advancing hydrometallurgical processing and water treatment capabilities, offering valuable insights for future copper leach projects.
