Mineral sands mining targets ancient coastal environments where geological forces have concentrated heavy minerals into valuable economic deposits. These strandlines contain highly sought-after minerals, predominantly Zircon, rutile, and Ilmenite, along with smaller quantities of leucoxene and Monazite. Many of these minerals, particularly zircon and monazite, are often associated with NORM (Naturally Occurring Radioactive Material), containing radionuclides such as Uranium-238 and Thorium from their respective Uranium Decay Series and Thorium Decay Chain. Because these minerals are exceptionally durable, they resist weathering and accumulate over millennia in coastal dunes or fossilised, inland beaches.
Extraction typically begins with open-pit dry mining or hydraulic dredging. In dry mining operations, large earthmoving equipment—such as scrapers, excavators, and continuous miners—removes the overlying topsoil, which is carefully stockpiled for progressive rehabilitation. The exposed mineral-bearing sand is then fed into a hopper. Alternatively, where water tables are high, floating dredges use a rotating cutter head to churn the sand into a slurry, pumping it directly to a floating wet concentrator plant.
Sand Ore Slurry
Spiral Concentrators
Heavy Mineral Concentrate
Tailings (Returned to Pit)
The primary processing stage relies entirely on physical separation rather than chemical agents. Because the target minerals have a significantly higher specific gravity than common quartz sand, gravity separation is highly effective. The sand slurry cascades down series of spiral concentrators. As the mixture spins, centrifugal force pushes the lighter quartz sand to the outside, while the heavier, valuable mineral particles concentrate along the inner channel.
The output is a Heavy Mineral Concentrate (HMC). The remaining quartz sand, or tailings, is immediately pumped back into the mined-out voids to reshape the landscape. The HMC is transported to a dry separation plant, where electrostatic and magnetic circuits isolate the individual mineral species based on their unique physical properties, preparing them for industrial use in ceramics, pigments, and titanium metal production.