Next-generation solutions around ore sorting




We are world-leading experts in the integration of ore sorting technology.

STARK has the expertise to implement almost every mining technology in the field to brownfield sites. Dense Media Separation (DMS) plants, RFID tracers, selective milling, magnetic separation; whatever your needs, we can deliver. As we are experts in delivering Greenfield plants from scratch, we can enhance and recalibrate virtually every aspect of your plant, delivering huge cost benefits with a rapid payback time.

However, STARK can also deliver some solutions that no other operator can.

The advantages of implementing ore sorting technology at Tier-1 projects:

  • Install integrated modular solutions, which can be ready within two weeks of arrival on site
  • Deliver rapid payback time, often of only a few months
  • Increase minable tons, reclaim waste dumps, divert ore types to access previously inaccessible revenue, decrease haulage costs and reduce tailings
  • Reduce water consumption by up to 100%, and energy consumption by up to 80%
  • Minimise reagent use

After initial orebody analysis, our focus is on immediate cash benefits, as all improvements which result in an increased yield from the orebody constitute 100% additional profit.

Our clients and partners say

Is a single test sufficient for determining ore sorting suitability in an orebody?

You may be under the misconception that ore sorting suitability can be determined with a single test. The sensors and software advancements available with modern technology are continuously evolving, and many assets have only been tested with one type of ore sorter. STARK uses the most advanced orebody analysis techniques to check whether a different approach might yield positive results. We’re able to source ore sorters from the entire market.

Beyond this, assets need to be comprehensively tested, with multiple samples taken from material including a high, low, and average expected feed. Tier 1 miners may think they need more advanced capacities than STARK can provide, but it’s often the case that only a small segment, or a specific size class, of total feed streams needs to be sorted for value add.

Other objections can include fears that original plant designs didn’t include sorting, or that it adds an extra layer of complexity to a simple, already smooth operation. However, this is another misconception — we independently integrate and apply equipment to reduce downstream chemical processing requirements and tailings, which makes the operation easier as well as cheaper.

At the very least, it’s worth a brief call to see whether we can help.

The two key sorting approaches we use
are XRT sorting and UV laser sorting.

XRT Sorting

XRT sorting is based on the mining principle that different materials absorb X-rays to varying degrees. For example, lithium-bearing ores absorb X-rays differently to host rocks such as clays or granites.

By measuring the intensity of the X-rays which make it through material, XRT sorting equipment can distinguish between valuable and worthless material, like how a doctor can distinguish bone through soft tissue on an X-ray scan.

Waste rock rejection by XRT sorting is typically coarse (within the -50 to +10mm fraction), and high capacity, targeting the specific atomic density of the waste rock. It’s the unique density range which sees waste removed from the feed material, improving the ore grade being fed into subsequent unit processes.

World-first laser sorting technology

Of course, you often only need XRT sorting to generate a saleable product. However, where a product still needs to be upgraded – in the case of lithium ore, up to SC6 quality – we roll out our unique selling point: the world’s first UV laser ore sorting technology. The valuable material that has made it through the XRT sorters is sent through the plant process to UV sorting.

Although STARK doesn’t develop or supply the technology itself, the company has facilitated the integration of the world’s first UV sorting application in hard rock lithium mining.

Additional benefits to your business



Run your mineral processing operation more efficiently and profitably by integrating our RFID tracer technology. Monitor your plant in real time with no shut-down time to introduce the tracers.



Mining is about volume and efficiencies. Monitor your fit-for-purpose, custom-built dashboard and have access to actionable data to make smart decisions and optimise immediately.



Reduce the negative impact of mining and do as little harm as possible. Reduce waste, don’t lose any ore that will need to be reprocessed and ensure efficient allocation of resources. Improve the safety of your employees.

Contact us

    Any questions?
    We are always at your service.

    Ryan Szabo

    B.Tech Mech Engineering


    +49 177 242 5901