JOHN FINLAY MINING中文JOHN FINLAY MINING中文X-rays image the inside of each rock — grade is read through dust, mud and moisture, and waste is ejected before it costs you anything.
XRT ore sorting is a dry, particle-by-particle separation method that X-rays each rock on a belt, uses dual-energy transmission to read its internal density and atomic number, and ejects waste with air jets — with zero process water and no reagents, at particle sizes of roughly 10–60 mm.
Each rock on the belt is X-rayed; transmission imaging with AI recognition reads internal density rather than surface appearance. High-pressure air ejectors then split ore from waste in flight. No water, no reagents, no drying stage.
XRT suits nearly every density- or atomic-number-contrast ore: tungsten, tin, antimony, fluorite, lead-zinc, copper, phosphate, barite, graphite, spodumene — and low-grade stockpiles that were never economic before. See it working in series with DMC in our Hunan tungsten case (95.43% recovery).
XRT takes the coarse window; the screen underflow feeds our dense medium cyclones — together covering the full 60–0.5 mm range.
| Parameter | Value |
|---|---|
| Particle size | 10–60 mm sorted; screen underflow routed to DMC |
| Sensing | dual-energy X-ray transmission (DE-XRT) — atomic-number discrimination with thickness compensation |
| Recognition | AI image classification on the transmission map of every particle |
| Ejection | high-speed air-valve array, millisecond response, particle-by-particle |
| Throughput | tens to hundreds of t/h per machine, belt-width dependent |
| Utilities | zero process water, no reagents; power and compressed air only |
Optical and NIR sorters read the particle surface, so dust coatings, moisture films and weathering rinds defeat them. Dual-energy XRT measures attenuation through the particle at two energy levels: the ratio isolates effective atomic number from thickness, so a mud-coated high-density particle classifies exactly like a washed one. That is why XRT holds accuracy on run-of-mine feed without washing or drying.
Q: What is the minimum particle size XRT can sort?
Practically ~10 mm: below that, per-particle ejection loses resolution and throughput economics fail. That is why our flowsheets pass the screen underflow to dense medium cyclones — as in the Hunan tungsten campaign.
Q: Does moisture, dust or surface mud affect accuracy?
No. Dual-energy transmission reads through the particle; surface condition is irrelevant. This is XRT's decisive advantage over optical and NIR sorting on run-of-mine feed.
Q: What utilities does a sorter need?
Electric power and clean compressed air for the ejection valves. No process water, no reagents — which is why XRT suits arid sites and water-capped permits.
Send ~1 tonne of representative ore — washability results within 24 hours of sample receipt.
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