Products: X-ray luminescence sorters
LS-20-05N X-ray sorter
Brochure LS-20-05N
Dimensional Drawing
Installation Drawing
Reference on the operation of X-ray luminescent sorters produced by Bourevestnik, Inc. and operated by CATOCA Mining Society, Lda. concentration plant (Angola)
The LS-20-05N sorter is designated for the enrichment of wet initial diamond ore with grain size -20 + 10, and - 10 + 5 mm.

The sorter's operation concept is based on the luminescence property of X-ray irradiated diamonds and on the difference of those properties with diamonds and associate luminescent minerals.

The sorter includes a sorting machine (SM) and an automated control rack (ACR).

Material to be processed Wet, clean from clay and slurries, classified (contents of main class 85% minimum)
Material grain size classes - 20 + 10 mm,
-10 + 5 mm
Material feed and transportation system Continuous flow system, single-pass. Loading hopper (with a flange to connect to the mill's transportation system) - gravity feeder with automatically controlled slide valve - a shaping slope chute (240 mm wide) - adjustable outer divider plate (concentrate-tailing) - concentrate and tailing channels (with flanges to connect the relevant mill's pipelines).
Non-single layer feed of material to the analysis area is allowed.
Throuput rates 45 t/hr (- 20 + 10 mm)
25 t/hr (- 10 + 5 mm)
number of tubes
mode of radiation
anode voltage
anode current
Two-sided eliminate of material flow in the freefall chute.
Pulse type (pulse length - 0.5 ms; pulse period - 4 ms).
35 kV max.
350 mA
Luminescent signals' receivers
number of receivers
detection channels
Two-sided material luminescent detection.
Photomultipliers (PHM)
6 (3 on each side of the material flow).
Analogue-to-digital detection system; options include operation both in amplitude-time mode and in special mode, increased selectivity, using kinetic features for luminescent.
Ejection Pneumatic, with compressed air, by means of solenoid-operated pneumatic valves
4-channel splitter. Edjection by all 4 valves simultaneously, irrespective of the channel where luminescent was detected
Recovery 98% minimum
Outward flow of material per one edjection (with Throuput rate) Max. 1.0 kg (- 20 + 10 mm),
0.5 kg (- 10 + 5 mm)
Extra option (supplied after a special order): Protection system against unauthorized access to SM, material
Checking of main systems prior to start of material feed and in the course of operation (material feed is stopped if fault is detected) Sensitivity Failure indication. Monitoring and control from the concentration mill's Automated Process Checking System.
Only if special smart cards are available and by commissioning.
Electric power supply 380V ± 10%;
50 Hz±2%;
7 kVA
Flow rate for transportation water (0.015 MPa) 1.2 (m³/hr) max.
Flow rate for potable quality water to cool the tubes 6 l/min max.
Flow rate for potable quality water to wash the windows of photo receptors and tube collimators (0.3 MPa) 0.5 l/min max.
Average compressed air flow rate (0.6 MPa) 0.03 m³/min
Overall dimensions (LxWxH), mass:
2300×845×2300 mm;
1100 kg
765×555×1745 mm;
230 kg
Operation conditions:
ambient air temperature:
From + 10°С to + 35°С.
Relative humidity (at ambient air temperature + 25°С) SM - to 100%
ACR - to 80%