The PFS study has identified the preferred development option to be a conventional truck and shovel open pit mining operation, and has determined an effective method of mineral processing to be a processing circuit incorporating primary crushing, grinding, gravity concentration
and cyanide leaching, followed by gold recovery using carbon-in-pulp, stripping and electrowinning.
Processing steps will include crushing, grinding, gravity concentration
, cyanide leach, counter-current decantation, Merrill Crowe extraction, and on-site refining to produce dore bars.
It details the theories of origin and formation of coal, its constituents, sampling, calorific value, rank, properties, classification, coking tests, and size, proximate, and ultimate analysis; processing aspects, namely unit operations, screening, size reduction, dewatering, beneficiation processes, gravity concentration
processes, heavy medium separation, jigging, flowing film concentration, froth flotation, centrifugal separators, and coal washing; and coal utilization, including carbonization, combustion, gasification, liquefaction, and capture and storage.
Among these, gravity concentration
processes enjoy the advantages of being cheaper, simple in operation and convenient (Shahzad, 2012) and are used extensively for coal cleaning (Wills and Napier-Munn, 2006).
Various beneficiation techniques including flotation heavy medium separation gravity concentration
and magnetic separationwere used to upgrade the ore.
is also planned to maximise the recovery of gold and minimise processing costs.
The test work was conducted to see if a bulk combined sample (ROM sample) is amendable to gravity concentration
and gold dissolution.
Based on all the work that we've done last the two years and this summer, yes, we're going to have the information in hand that demonstrates we have a deposit here that can be operated economically at a much larger scale using gravity concentration
," Gross said, during a tour of the processing facility.
The CSIRO team has proposed a process that would combine hydraulic classification to remove plastic, foam, rubber and other low-density, nonmetallic materials, magnetic separation to concentrate clean steel, and gravity concentration
in a jig to separate low-density materials like calcite and glass from the high-density metals like copper, lead and brass.
This scheme was soon replaced by chlorate-sulphuric acid-soda leaching with gravity concentration
at the process head.
The earliest method, other than collecting it by hand, was by gravity concentration
in water but modern mining utilises up-to-date technology.
Moreover, unlike most gravity concentration
systems which prefer closely sized material, the RAC works well on a broad size range of material.